diff --git a/regression/book-examples/CMakeLists.txt b/regression/book-examples/CMakeLists.txt
index 0d700299478..542439bf298 100644
--- a/regression/book-examples/CMakeLists.txt
+++ b/regression/book-examples/CMakeLists.txt
@@ -30,11 +30,11 @@ add_test_pl_profile(
     "CORE"
 )
 
-# If `-I` (include flag) is passed, test.pl will run only the tests matching the label following it.
+# If `-X` (exclude flag) is passed, test.pl will exclude the tests matching the label following it.
 add_test_pl_profile(
   "book-examples-new-smt-backend"
   "$<TARGET_FILE:cbmc> --incremental-smt2-solver 'z3 --smt2 -in'"
-  "${gcc_only_string}-I;new-smt-backend;-s;new-smt-backend"
+  "${gcc_only_string}-X;no-new-smt;-s;new-smt-backend"
   "CORE"
 )
 
diff --git a/regression/book-examples/Makefile b/regression/book-examples/Makefile
index a633d3cbaa9..e5777ce8774 100644
--- a/regression/book-examples/Makefile
+++ b/regression/book-examples/Makefile
@@ -31,7 +31,7 @@ test-paths-lifo:
 
 test-new-smt-backend:
 	@../test.pl -e -p -c "../../../src/cbmc/cbmc --incremental-smt2-solver 'z3 --smt2 -in'" \
-					  -I new-smt-backend \
+					  -X no-new-smt \
 					  -s new-smt-backend $(GCC_ONLY)
 
 tests.log: ../test.pl test
diff --git a/regression/book-examples/abs/C1.desc b/regression/book-examples/abs/C1.desc
index 9b08578871c..0f5007ecbfc 100644
--- a/regression/book-examples/abs/C1.desc
+++ b/regression/book-examples/abs/C1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 abs.c
 --function abs
 ^EXIT=0$
diff --git a/regression/book-examples/abs/C13.desc b/regression/book-examples/abs/C13.desc
index b94e41c8f0e..10f601a6879 100644
--- a/regression/book-examples/abs/C13.desc
+++ b/regression/book-examples/abs/C13.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 abs.c
 --function abs --signed-overflow-check --show-goto-functions
 ^EXIT=0$
diff --git a/regression/book-examples/abs/C2.desc b/regression/book-examples/abs/C2.desc
index 3afbdc4fb55..567d7432fb7 100644
--- a/regression/book-examples/abs/C2.desc
+++ b/regression/book-examples/abs/C2.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 abs.c
 --function abs --signed-overflow-check
 ^EXIT=10$
diff --git a/regression/book-examples/abs/C3.desc b/regression/book-examples/abs/C3.desc
index dac48029b63..af88b9510b1 100644
--- a/regression/book-examples/abs/C3.desc
+++ b/regression/book-examples/abs/C3.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 abs.c
 --function abs --signed-overflow-check --trace
 ^EXIT=10$
diff --git a/regression/book-examples/binsearch/C4.desc b/regression/book-examples/binsearch/C4.desc
index e11431d78a4..b705e94e627 100644
--- a/regression/book-examples/binsearch/C4.desc
+++ b/regression/book-examples/binsearch/C4.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 binsearch.c
 --function binsearch --unwind 6 --bounds-check --unwinding-assertions
 ^EXIT=0$
diff --git a/regression/book-examples/lock/depth.desc b/regression/book-examples/lock/depth.desc
index 8a50ddf5ac1..2f343fea21b 100644
--- a/regression/book-examples/lock/depth.desc
+++ b/regression/book-examples/lock/depth.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 lock.c
 --depth 10
 ^EXIT=0$
diff --git a/regression/book-examples/lock/unwind1.desc b/regression/book-examples/lock/unwind1.desc
index 4fe3fd2f67e..44b6fd7291e 100644
--- a/regression/book-examples/lock/unwind1.desc
+++ b/regression/book-examples/lock/unwind1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 lock.c
 --unwind 1
 ^EXIT=0$
diff --git a/regression/book-examples/lock/unwind2.desc b/regression/book-examples/lock/unwind2.desc
index 095b5ee6b98..2b030385116 100644
--- a/regression/book-examples/lock/unwind2.desc
+++ b/regression/book-examples/lock/unwind2.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 lock.c
 --unwind 2
 ^EXIT=10$
diff --git a/regression/book-examples/login/C5.desc b/regression/book-examples/login/C5.desc
index a42eafe12cc..ec416f04b15 100644
--- a/regression/book-examples/login/C5.desc
+++ b/regression/book-examples/login/C5.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 login.c
 --unwind 20 --bounds-check
 ^EXIT=10$
diff --git a/regression/book-examples/login/C6.desc b/regression/book-examples/login/C6.desc
index 5f23b857c17..ad974ddb95a 100644
--- a/regression/book-examples/login/C6.desc
+++ b/regression/book-examples/login/C6.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 login.c
 --show-properties --bounds-check --pointer-check
 ^EXIT=0$
diff --git a/regression/book-examples/login/C7.desc b/regression/book-examples/login/C7.desc
index 08abd792b4f..ec4aac94467 100644
--- a/regression/book-examples/login/C7.desc
+++ b/regression/book-examples/login/C7.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 login.c
 --unwind 20 --show-vcc --bounds-check --pointer-check
 ^EXIT=0$
diff --git a/regression/book-examples/login/C8.desc b/regression/book-examples/login/C8.desc
index 0c4570971ed..6521123d821 100644
--- a/regression/book-examples/login/C8.desc
+++ b/regression/book-examples/login/C8.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 login.c
 --unwind 20 --bounds-check --pointer-check
 ^EXIT=10$
diff --git a/regression/book-examples/login/C9.desc b/regression/book-examples/login/C9.desc
index 2d00651face..7d0ca0b9e63 100644
--- a/regression/book-examples/login/C9.desc
+++ b/regression/book-examples/login/C9.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 login.c
 --unwind 20 --bounds-check --pointer-check --trace
 ^EXIT=10$
diff --git a/regression/book-examples/pid/C11.desc b/regression/book-examples/pid/C11.desc
index 3bb75a1099a..ba3c301548f 100644
--- a/regression/book-examples/pid/C11.desc
+++ b/regression/book-examples/pid/C11.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 pid.c
 --cover mcdc --unwind 6
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/CMakeLists.txt b/regression/cbmc-primitives/CMakeLists.txt
index d29594eebd1..331c1cd1fe2 100644
--- a/regression/cbmc-primitives/CMakeLists.txt
+++ b/regression/cbmc-primitives/CMakeLists.txt
@@ -5,11 +5,11 @@ if(Z3_EXISTS)
         "$<TARGET_FILE:cbmc>"
     )
 
-    # If `-I` (include flag) is passed, test.pl will run only the tests matching the label following it.
+    # If `-X` (exclude flag) is passed, test.pl will exclude the tests matching the label following it.
     add_test_pl_profile(
             "cbmc-primitives-new-smt-backend"
             "$<TARGET_FILE:cbmc> --incremental-smt2-solver 'z3 --smt2 -in'"
-            "-I;new-smt-backend;-s;new-smt-backend"
+            "-X;no-new-smt;-s;new-smt-backend"
             "CORE"
     )
 else()
diff --git a/regression/cbmc-primitives/Makefile b/regression/cbmc-primitives/Makefile
index 1c5578af570..e60c0d87ca5 100644
--- a/regression/cbmc-primitives/Makefile
+++ b/regression/cbmc-primitives/Makefile
@@ -4,7 +4,7 @@ test:
 	@../test.pl -e -p -c ../../../src/cbmc/cbmc
 
 test.smt2_incr:
-	@../test.pl -e -p -I new-smt-backend -c "../../../src/cbmc/cbmc --incremental-smt2-solver 'z3 --smt2 -in' --validate-goto-model --validate-ssa-equation"
+	@../test.pl -e -p -X no-new-smt -c "../../../src/cbmc/cbmc --incremental-smt2-solver 'z3 --smt2 -in' --validate-goto-model --validate-ssa-equation"
 
 tests.log: ../test.pl
 	@../test.pl -e -p -c ../../../src/cbmc/cbmc
diff --git a/regression/cbmc-primitives/alternating_quantifiers_6231/exists_in_forall.desc b/regression/cbmc-primitives/alternating_quantifiers_6231/exists_in_forall.desc
index a30dc3ff971..0a64fd8c084 100644
--- a/regression/cbmc-primitives/alternating_quantifiers_6231/exists_in_forall.desc
+++ b/regression/cbmc-primitives/alternating_quantifiers_6231/exists_in_forall.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 exists_in_forall.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/alternating_quantifiers_6231/forall_in_exists.desc b/regression/cbmc-primitives/alternating_quantifiers_6231/forall_in_exists.desc
index c2d038ac09e..d342ec6ad16 100644
--- a/regression/cbmc-primitives/alternating_quantifiers_6231/forall_in_exists.desc
+++ b/regression/cbmc-primitives/alternating_quantifiers_6231/forall_in_exists.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 forall_in_exists.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/dynamic-object-02/test-no-cp.desc b/regression/cbmc-primitives/dynamic-object-02/test-no-cp.desc
index c81d679d7bb..7849c7b2f9d 100644
--- a/regression/cbmc-primitives/dynamic-object-02/test-no-cp.desc
+++ b/regression/cbmc-primitives/dynamic-object-02/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-simplify --no-propagation
 ^EXIT=10$
diff --git a/regression/cbmc-primitives/dynamic-object-02/test.desc b/regression/cbmc-primitives/dynamic-object-02/test.desc
index ad5b36e5df8..56e1062fb95 100644
--- a/regression/cbmc-primitives/dynamic-object-02/test.desc
+++ b/regression/cbmc-primitives/dynamic-object-02/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc-primitives/exists_assume_6231/test.desc b/regression/cbmc-primitives/exists_assume_6231/test.desc
index 0510753828f..93fbac32173 100644
--- a/regression/cbmc-primitives/exists_assume_6231/test.desc
+++ b/regression/cbmc-primitives/exists_assume_6231/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/exists_assume_6231/test2.desc b/regression/cbmc-primitives/exists_assume_6231/test2.desc
index d5dc3e29ef7..73b4a57e53a 100644
--- a/regression/cbmc-primitives/exists_assume_6231/test2.desc
+++ b/regression/cbmc-primitives/exists_assume_6231/test2.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test2.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc-primitives/exists_memory_checks/invalid_index_range.desc b/regression/cbmc-primitives/exists_memory_checks/invalid_index_range.desc
index 09a4b6a7a72..de78c06a295 100644
--- a/regression/cbmc-primitives/exists_memory_checks/invalid_index_range.desc
+++ b/regression/cbmc-primitives/exists_memory_checks/invalid_index_range.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 invalid_index_range.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc-primitives/exists_memory_checks/negated_exists.desc b/regression/cbmc-primitives/exists_memory_checks/negated_exists.desc
index 69643c4a532..7cac0d2b3df 100644
--- a/regression/cbmc-primitives/exists_memory_checks/negated_exists.desc
+++ b/regression/cbmc-primitives/exists_memory_checks/negated_exists.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 negated_exists.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/exists_memory_checks/smt_missing_range_check.desc b/regression/cbmc-primitives/exists_memory_checks/smt_missing_range_check.desc
index e607b134aa9..56f0ee65866 100644
--- a/regression/cbmc-primitives/exists_memory_checks/smt_missing_range_check.desc
+++ b/regression/cbmc-primitives/exists_memory_checks/smt_missing_range_check.desc
@@ -1,4 +1,4 @@
-CORE smt-backend
+CORE smt-backend no-new-smt
 smt_missing_range_check.c
 --pointer-check -z3
 ^EXIT=10$
diff --git a/regression/cbmc-primitives/exists_memory_checks/valid_index_range.desc b/regression/cbmc-primitives/exists_memory_checks/valid_index_range.desc
index 4701ef529ad..90ae42be1c3 100644
--- a/regression/cbmc-primitives/exists_memory_checks/valid_index_range.desc
+++ b/regression/cbmc-primitives/exists_memory_checks/valid_index_range.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 valid_index_range.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/forall_6231_1/test.desc b/regression/cbmc-primitives/forall_6231_1/test.desc
index e7be61857f2..2288457a7ab 100644
--- a/regression/cbmc-primitives/forall_6231_1/test.desc
+++ b/regression/cbmc-primitives/forall_6231_1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/forall_6231_2/test.desc b/regression/cbmc-primitives/forall_6231_2/test.desc
index 0ee5ae2025e..9c3574eb406 100644
--- a/regression/cbmc-primitives/forall_6231_2/test.desc
+++ b/regression/cbmc-primitives/forall_6231_2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/forall_6231_3/test.desc b/regression/cbmc-primitives/forall_6231_3/test.desc
index 52fd12384f8..f3b3fdf813c 100644
--- a/regression/cbmc-primitives/forall_6231_3/test.desc
+++ b/regression/cbmc-primitives/forall_6231_3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/forall_6231_3/test_malloc_less_than_bound.desc b/regression/cbmc-primitives/forall_6231_3/test_malloc_less_than_bound.desc
index fa1886f8261..5ea23c0cc79 100644
--- a/regression/cbmc-primitives/forall_6231_3/test_malloc_less_than_bound.desc
+++ b/regression/cbmc-primitives/forall_6231_3/test_malloc_less_than_bound.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test_malloc_less_than_bound.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc-primitives/forall_6231_4/test.desc b/regression/cbmc-primitives/forall_6231_4/test.desc
index 6b12e3a208b..94c737847f5 100644
--- a/regression/cbmc-primitives/forall_6231_4/test.desc
+++ b/regression/cbmc-primitives/forall_6231_4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --div-by-zero-check
 ^EXIT=10$
diff --git a/regression/cbmc-primitives/implication_statement_checks_1/test.desc b/regression/cbmc-primitives/implication_statement_checks_1/test.desc
index 887b45caf26..2342fe5ad35 100644
--- a/regression/cbmc-primitives/implication_statement_checks_1/test.desc
+++ b/regression/cbmc-primitives/implication_statement_checks_1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 --div-by-zero-check
 test.c
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/pointer-offset-01/test-no-cp.desc b/regression/cbmc-primitives/pointer-offset-01/test-no-cp.desc
index 5e71e5b8485..7dee0d0d985 100644
--- a/regression/cbmc-primitives/pointer-offset-01/test-no-cp.desc
+++ b/regression/cbmc-primitives/pointer-offset-01/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-simplify --no-propagation
 ^EXIT=10$
diff --git a/regression/cbmc-primitives/pointer-offset-01/test.desc b/regression/cbmc-primitives/pointer-offset-01/test.desc
index b6d13bdf66f..4d46a9ceddc 100644
--- a/regression/cbmc-primitives/pointer-offset-01/test.desc
+++ b/regression/cbmc-primitives/pointer-offset-01/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc-primitives/r_w_ok_bug/test.desc b/regression/cbmc-primitives/r_w_ok_bug/test.desc
index 5dd4be23e5f..e47b34c18b2 100644
--- a/regression/cbmc-primitives/r_w_ok_bug/test.desc
+++ b/regression/cbmc-primitives/r_w_ok_bug/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --no-simplify --no-propagation
 ^\[main.pointer_dereference.\d+\] line 8 dereference failure: pointer outside object bounds in \*p1: FAILURE$
diff --git a/regression/cbmc-primitives/r_w_ok_inconsistent_invalid/test-no-cp.desc b/regression/cbmc-primitives/r_w_ok_inconsistent_invalid/test-no-cp.desc
index 6a35b801d51..ada56588c85 100644
--- a/regression/cbmc-primitives/r_w_ok_inconsistent_invalid/test-no-cp.desc
+++ b/regression/cbmc-primitives/r_w_ok_inconsistent_invalid/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --no-simplify --no-propagation
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/r_w_ok_inconsistent_invalid/test.desc b/regression/cbmc-primitives/r_w_ok_inconsistent_invalid/test.desc
index dfbef465fd3..2b2871e6642 100644
--- a/regression/cbmc-primitives/r_w_ok_inconsistent_invalid/test.desc
+++ b/regression/cbmc-primitives/r_w_ok_inconsistent_invalid/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/r_w_ok_null/test-no-cp.desc b/regression/cbmc-primitives/r_w_ok_null/test-no-cp.desc
index e09fcc5760b..2e9f6335203 100644
--- a/regression/cbmc-primitives/r_w_ok_null/test-no-cp.desc
+++ b/regression/cbmc-primitives/r_w_ok_null/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --no-simplify --no-propagation
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/r_w_ok_null/test.desc b/regression/cbmc-primitives/r_w_ok_null/test.desc
index 3fbe7bf0e90..1823876a8c0 100644
--- a/regression/cbmc-primitives/r_w_ok_null/test.desc
+++ b/regression/cbmc-primitives/r_w_ok_null/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/r_w_ok_valid/test-no-cp.desc b/regression/cbmc-primitives/r_w_ok_valid/test-no-cp.desc
index 8e80aa977cb..63d28ba42a1 100644
--- a/regression/cbmc-primitives/r_w_ok_valid/test-no-cp.desc
+++ b/regression/cbmc-primitives/r_w_ok_valid/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --no-simplify --no-propagation
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/r_w_ok_valid/test.desc b/regression/cbmc-primitives/r_w_ok_valid/test.desc
index 8cf3be37deb..328c947b45c 100644
--- a/regression/cbmc-primitives/r_w_ok_valid/test.desc
+++ b/regression/cbmc-primitives/r_w_ok_valid/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/r_w_ok_valid_negated/test-no-cp.desc b/regression/cbmc-primitives/r_w_ok_valid_negated/test-no-cp.desc
index cc8569b0362..3f232e2ad3a 100644
--- a/regression/cbmc-primitives/r_w_ok_valid_negated/test-no-cp.desc
+++ b/regression/cbmc-primitives/r_w_ok_valid_negated/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --no-simplify --no-propagation
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/r_w_ok_valid_negated/test.desc b/regression/cbmc-primitives/r_w_ok_valid_negated/test.desc
index 4b5fb0cda97..c3047928dc7 100644
--- a/regression/cbmc-primitives/r_w_ok_valid_negated/test.desc
+++ b/regression/cbmc-primitives/r_w_ok_valid_negated/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/same-object-01/test-no-cp.desc b/regression/cbmc-primitives/same-object-01/test-no-cp.desc
index 6e3503f0649..97df364eec4 100644
--- a/regression/cbmc-primitives/same-object-01/test-no-cp.desc
+++ b/regression/cbmc-primitives/same-object-01/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-simplify --no-propagation
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/same-object-01/test.desc b/regression/cbmc-primitives/same-object-01/test.desc
index e5ccb6957c6..d32f40840c5 100644
--- a/regression/cbmc-primitives/same-object-01/test.desc
+++ b/regression/cbmc-primitives/same-object-01/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/same-object-02/test-no-cp.desc b/regression/cbmc-primitives/same-object-02/test-no-cp.desc
index 3571af6d1a8..1ac4fc36084 100644
--- a/regression/cbmc-primitives/same-object-02/test-no-cp.desc
+++ b/regression/cbmc-primitives/same-object-02/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-simplify --no-propagation
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/same-object-02/test.desc b/regression/cbmc-primitives/same-object-02/test.desc
index a9218179515..38d01968b72 100644
--- a/regression/cbmc-primitives/same-object-02/test.desc
+++ b/regression/cbmc-primitives/same-object-02/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/same-object-03/test-no-cp.desc b/regression/cbmc-primitives/same-object-03/test-no-cp.desc
index a4b5eac61c4..1fb48dd8ec4 100644
--- a/regression/cbmc-primitives/same-object-03/test-no-cp.desc
+++ b/regression/cbmc-primitives/same-object-03/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-simplify --no-propagation
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/same-object-03/test.desc b/regression/cbmc-primitives/same-object-03/test.desc
index fede8a24802..e6bfec93ba4 100644
--- a/regression/cbmc-primitives/same-object-03/test.desc
+++ b/regression/cbmc-primitives/same-object-03/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/same-object-04/test-no-cp.desc b/regression/cbmc-primitives/same-object-04/test-no-cp.desc
index 79250c34577..af320058c24 100644
--- a/regression/cbmc-primitives/same-object-04/test-no-cp.desc
+++ b/regression/cbmc-primitives/same-object-04/test-no-cp.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-simplify --no-propagation
 ^EXIT=0$
diff --git a/regression/cbmc-primitives/same-object-04/test.desc b/regression/cbmc-primitives/same-object-04/test.desc
index e7467607904..04675e48d79 100644
--- a/regression/cbmc-primitives/same-object-04/test.desc
+++ b/regression/cbmc-primitives/same-object-04/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/ACSL/operators.desc b/regression/cbmc/ACSL/operators.desc
index fbaf5072a5c..0f3f061b7a7 100644
--- a/regression/cbmc/ACSL/operators.desc
+++ b/regression/cbmc/ACSL/operators.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 operators.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/ACSL/quantifier-precedence.desc b/regression/cbmc/ACSL/quantifier-precedence.desc
index 82d82540504..36922c52380 100644
--- a/regression/cbmc/ACSL/quantifier-precedence.desc
+++ b/regression/cbmc/ACSL/quantifier-precedence.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 quantifier-precedence.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/ASHR1/test.desc b/regression/cbmc/ASHR1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/ASHR1/test.desc
+++ b/regression/cbmc/ASHR1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Address_of1/test.desc b/regression/cbmc/Address_of1/test.desc
index d18a7f927da..d891ef29be9 100644
--- a/regression/cbmc/Address_of1/test.desc
+++ b/regression/cbmc/Address_of1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --stop-on-fail
 ^\[main\.assertion
diff --git a/regression/cbmc/Address_of2/test.desc b/regression/cbmc/Address_of2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Address_of2/test.desc
+++ b/regression/cbmc/Address_of2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Anonymous_Struct1/test.desc b/regression/cbmc/Anonymous_Struct1/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Anonymous_Struct1/test.desc
+++ b/regression/cbmc/Anonymous_Struct1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Anonymous_Struct2/test.desc b/regression/cbmc/Anonymous_Struct2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Anonymous_Struct2/test.desc
+++ b/regression/cbmc/Anonymous_Struct2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Anonymous_Struct3/test.desc b/regression/cbmc/Anonymous_Struct3/test.desc
index 86980b336e4..7057e2afbe7 100644
--- a/regression/cbmc/Anonymous_Struct3/test.desc
+++ b/regression/cbmc/Anonymous_Struct3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 -win32
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Access1/test.desc b/regression/cbmc/Array_Access1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Access1/test.desc
+++ b/regression/cbmc/Array_Access1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Access2/test.desc b/regression/cbmc/Array_Access2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Access2/test.desc
+++ b/regression/cbmc/Array_Access2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Access3/test.desc b/regression/cbmc/Array_Access3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Access3/test.desc
+++ b/regression/cbmc/Array_Access3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Initialization1/test.desc b/regression/cbmc/Array_Initialization1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Initialization1/test.desc
+++ b/regression/cbmc/Array_Initialization1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Initialization2/test.desc b/regression/cbmc/Array_Initialization2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Initialization2/test.desc
+++ b/regression/cbmc/Array_Initialization2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Initialization3/test.desc b/regression/cbmc/Array_Initialization3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Initialization3/test.desc
+++ b/regression/cbmc/Array_Initialization3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Pointer1/test.desc b/regression/cbmc/Array_Pointer1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Pointer1/test.desc
+++ b/regression/cbmc/Array_Pointer1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Pointer2/test.desc b/regression/cbmc/Array_Pointer2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Pointer2/test.desc
+++ b/regression/cbmc/Array_Pointer2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Pointer3/test.desc b/regression/cbmc/Array_Pointer3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Pointer3/test.desc
+++ b/regression/cbmc/Array_Pointer3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Pointer4/test.desc b/regression/cbmc/Array_Pointer4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Pointer4/test.desc
+++ b/regression/cbmc/Array_Pointer4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Pointer5/test.desc b/regression/cbmc/Array_Pointer5/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Pointer5/test.desc
+++ b/regression/cbmc/Array_Pointer5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Pointer6/test.desc b/regression/cbmc/Array_Pointer6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Pointer6/test.desc
+++ b/regression/cbmc/Array_Pointer6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Pointer7/test.desc b/regression/cbmc/Array_Pointer7/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Array_Pointer7/test.desc
+++ b/regression/cbmc/Array_Pointer7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_Propagation1/test.desc b/regression/cbmc/Array_Propagation1/test.desc
index 1880bbb5b32..c7996d86f9f 100644
--- a/regression/cbmc/Array_Propagation1/test.desc
+++ b/regression/cbmc/Array_Propagation1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Array_UF1/test.desc b/regression/cbmc/Array_UF1/test.desc
index b87b796089e..61e3418f5e6 100644
--- a/regression/cbmc/Array_UF1/test.desc
+++ b/regression/cbmc/Array_UF1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 11
 ^EXIT=0$
diff --git a/regression/cbmc/Array_UF10/test.desc b/regression/cbmc/Array_UF10/test.desc
index 84d4733c0c3..a74140bd6ed 100644
--- a/regression/cbmc/Array_UF10/test.desc
+++ b/regression/cbmc/Array_UF10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 1
 ^EXIT=0$
diff --git a/regression/cbmc/Array_UF11/test.desc b/regression/cbmc/Array_UF11/test.desc
index e231e47ae69..c4496ea4fd2 100644
--- a/regression/cbmc/Array_UF11/test.desc
+++ b/regression/cbmc/Array_UF11/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 1
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF12/test.desc b/regression/cbmc/Array_UF12/test.desc
index 618dd4be233..09c3a6e12da 100644
--- a/regression/cbmc/Array_UF12/test.desc
+++ b/regression/cbmc/Array_UF12/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 2
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF13/test.desc b/regression/cbmc/Array_UF13/test.desc
index 84d4733c0c3..a74140bd6ed 100644
--- a/regression/cbmc/Array_UF13/test.desc
+++ b/regression/cbmc/Array_UF13/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 1
 ^EXIT=0$
diff --git a/regression/cbmc/Array_UF14/test.desc b/regression/cbmc/Array_UF14/test.desc
index 2569d3b97ff..2a5c51a9f90 100644
--- a/regression/cbmc/Array_UF14/test.desc
+++ b/regression/cbmc/Array_UF14/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths new-smt-backend
+CORE thorough-paths
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 6
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF15/test.desc b/regression/cbmc/Array_UF15/test.desc
index 074b36a4a1b..15690b94615 100644
--- a/regression/cbmc/Array_UF15/test.desc
+++ b/regression/cbmc/Array_UF15/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths new-smt-backend
+CORE thorough-paths
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 11
 ^EXIT=0$
diff --git a/regression/cbmc/Array_UF16/test.desc b/regression/cbmc/Array_UF16/test.desc
index 618dd4be233..09c3a6e12da 100644
--- a/regression/cbmc/Array_UF16/test.desc
+++ b/regression/cbmc/Array_UF16/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 2
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF17/test.desc b/regression/cbmc/Array_UF17/test.desc
index 4ba91617222..e9939c1e8c3 100644
--- a/regression/cbmc/Array_UF17/test.desc
+++ b/regression/cbmc/Array_UF17/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths new-smt-backend
+CORE thorough-paths
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 9
 ^EXIT=0$
diff --git a/regression/cbmc/Array_UF18/test.desc b/regression/cbmc/Array_UF18/test.desc
index b87b796089e..61e3418f5e6 100644
--- a/regression/cbmc/Array_UF18/test.desc
+++ b/regression/cbmc/Array_UF18/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 11
 ^EXIT=0$
diff --git a/regression/cbmc/Array_UF19/test.desc b/regression/cbmc/Array_UF19/test.desc
index e22d35d5205..d92ab778129 100644
--- a/regression/cbmc/Array_UF19/test.desc
+++ b/regression/cbmc/Array_UF19/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths new-smt-backend
+CORE thorough-paths
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 3
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF2/test.desc b/regression/cbmc/Array_UF2/test.desc
index a3e52fdd404..ebecd288e48 100644
--- a/regression/cbmc/Array_UF2/test.desc
+++ b/regression/cbmc/Array_UF2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 5
 ^EXIT=0$
diff --git a/regression/cbmc/Array_UF20/test.desc b/regression/cbmc/Array_UF20/test.desc
index d6516a4f9b2..fa4e310b875 100644
--- a/regression/cbmc/Array_UF20/test.desc
+++ b/regression/cbmc/Array_UF20/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 12
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF21/test.desc b/regression/cbmc/Array_UF21/test.desc
index e9d3c4ebe15..c022bf3a395 100644
--- a/regression/cbmc/Array_UF21/test.desc
+++ b/regression/cbmc/Array_UF21/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --arrays-uf-always --bounds-check
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/Array_UF3/test.desc b/regression/cbmc/Array_UF3/test.desc
index a55860596c0..912cf6019b0 100644
--- a/regression/cbmc/Array_UF3/test.desc
+++ b/regression/cbmc/Array_UF3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 3 --no-unwinding-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF5/test.desc b/regression/cbmc/Array_UF5/test.desc
index 618dd4be233..09c3a6e12da 100644
--- a/regression/cbmc/Array_UF5/test.desc
+++ b/regression/cbmc/Array_UF5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 2
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF6/test.desc b/regression/cbmc/Array_UF6/test.desc
index e22d35d5205..d92ab778129 100644
--- a/regression/cbmc/Array_UF6/test.desc
+++ b/regression/cbmc/Array_UF6/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths new-smt-backend
+CORE thorough-paths
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 3
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF7/test.desc b/regression/cbmc/Array_UF7/test.desc
index 5c423a157a9..c47f81c71cc 100644
--- a/regression/cbmc/Array_UF7/test.desc
+++ b/regression/cbmc/Array_UF7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 3
 ^EXIT=10$
diff --git a/regression/cbmc/Array_UF9/test.desc b/regression/cbmc/Array_UF9/test.desc
index abec3deb3e4..b3db38477ee 100644
--- a/regression/cbmc/Array_UF9/test.desc
+++ b/regression/cbmc/Array_UF9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arrays-uf-always --no-propagation --refine-arrays --unwind 21
 ^EXIT=10$
diff --git a/regression/cbmc/Array_operations1/full-slice.desc b/regression/cbmc/Array_operations1/full-slice.desc
index 7a1611c0d8f..2fe6c114f6e 100644
--- a/regression/cbmc/Array_operations1/full-slice.desc
+++ b/regression/cbmc/Array_operations1/full-slice.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --full-slice
 ^EXIT=10$
diff --git a/regression/cbmc/Array_operations1/test.desc b/regression/cbmc/Array_operations1/test.desc
index 55311b430f9..ba6bbd32daf 100644
--- a/regression/cbmc/Array_operations1/test.desc
+++ b/regression/cbmc/Array_operations1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Array_operations2/test.desc b/regression/cbmc/Array_operations2/test.desc
index 712e870ea1c..559e087cce9 100644
--- a/regression/cbmc/Array_operations2/test.desc
+++ b/regression/cbmc/Array_operations2/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 
 ^\[main.assertion.12\] line 34 assertion arr\[1\].c\[2\] == 0: FAILURE$
diff --git a/regression/cbmc/Associativity1/test.desc b/regression/cbmc/Associativity1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Associativity1/test.desc
+++ b/regression/cbmc/Associativity1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Assumption1/test.desc b/regression/cbmc/Assumption1/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Assumption1/test.desc
+++ b/regression/cbmc/Assumption1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/BV_Arithmetic1/test.desc b/regression/cbmc/BV_Arithmetic1/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/BV_Arithmetic1/test.desc
+++ b/regression/cbmc/BV_Arithmetic1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/BV_Arithmetic2/test.desc b/regression/cbmc/BV_Arithmetic2/test.desc
index baa24854523..23e981a3744 100644
--- a/regression/cbmc/BV_Arithmetic2/test.desc
+++ b/regression/cbmc/BV_Arithmetic2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --unwind 32
 ^EXIT=0$
diff --git a/regression/cbmc/BV_Arithmetic3/test.desc b/regression/cbmc/BV_Arithmetic3/test.desc
index 00f3ce2d93a..d2a7e3e7574 100644
--- a/regression/cbmc/BV_Arithmetic3/test.desc
+++ b/regression/cbmc/BV_Arithmetic3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/BV_Arithmetic4/test.desc b/regression/cbmc/BV_Arithmetic4/test.desc
index baa24854523..23e981a3744 100644
--- a/regression/cbmc/BV_Arithmetic4/test.desc
+++ b/regression/cbmc/BV_Arithmetic4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --unwind 32
 ^EXIT=0$
diff --git a/regression/cbmc/BV_Arithmetic5/test.desc b/regression/cbmc/BV_Arithmetic5/test.desc
index baa24854523..23e981a3744 100644
--- a/regression/cbmc/BV_Arithmetic5/test.desc
+++ b/regression/cbmc/BV_Arithmetic5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --unwind 32
 ^EXIT=0$
diff --git a/regression/cbmc/BV_Arithmetic6/test.desc b/regression/cbmc/BV_Arithmetic6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/BV_Arithmetic6/test.desc
+++ b/regression/cbmc/BV_Arithmetic6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Bitfields1/test.desc b/regression/cbmc/Bitfields1/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Bitfields1/test.desc
+++ b/regression/cbmc/Bitfields1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Bitfields2/test.desc b/regression/cbmc/Bitfields2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Bitfields2/test.desc
+++ b/regression/cbmc/Bitfields2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Bitfields3/paths.desc b/regression/cbmc/Bitfields3/paths.desc
index 81ec9c8ed2d..2b3f7623037 100644
--- a/regression/cbmc/Bitfields3/paths.desc
+++ b/regression/cbmc/Bitfields3/paths.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check --bounds-check --paths lifo
 ^EXIT=0$
diff --git a/regression/cbmc/Bitfields3/test.desc b/regression/cbmc/Bitfields3/test.desc
index 96c9b4bcd7b..032c2879b43 100644
--- a/regression/cbmc/Bitfields3/test.desc
+++ b/regression/cbmc/Bitfields3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/Bitfields4/test.desc b/regression/cbmc/Bitfields4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Bitfields4/test.desc
+++ b/regression/cbmc/Bitfields4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Bool/bool1.desc b/regression/cbmc/Bool/bool1.desc
index b45c1b483af..0638fdff0e6 100644
--- a/regression/cbmc/Bool/bool1.desc
+++ b/regression/cbmc/Bool/bool1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 bool1.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Bool/bool2.desc b/regression/cbmc/Bool/bool2.desc
index e1e55611867..e298f35dce1 100644
--- a/regression/cbmc/Bool/bool2.desc
+++ b/regression/cbmc/Bool/bool2.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 bool2.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Bool/bool3.desc b/regression/cbmc/Bool/bool3.desc
index ab33f1f0312..2cd8843c88c 100644
--- a/regression/cbmc/Bool/bool3.desc
+++ b/regression/cbmc/Bool/bool3.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 bool3.c
 --json-ui
 ^EXIT=10$
diff --git a/regression/cbmc/Bool/bool4.desc b/regression/cbmc/Bool/bool4.desc
index 48975cb2285..49b4f5e01d2 100644
--- a/regression/cbmc/Bool/bool4.desc
+++ b/regression/cbmc/Bool/bool4.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 bool4.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Bool/bool5-full-slice.desc b/regression/cbmc/Bool/bool5-full-slice.desc
index c94ef40020a..6fc49d6b0cf 100644
--- a/regression/cbmc/Bool/bool5-full-slice.desc
+++ b/regression/cbmc/Bool/bool5-full-slice.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 bool5.c
 --full-slice
 Generated 4 VCC\(s\), 0 remaining after simplification
diff --git a/regression/cbmc/Bool/bool5.desc b/regression/cbmc/Bool/bool5.desc
index ab32f527065..273ab4b0ed7 100644
--- a/regression/cbmc/Bool/bool5.desc
+++ b/regression/cbmc/Bool/bool5.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 bool5.c
 
 Generated 4 VCC\(s\), 0 remaining after simplification
diff --git a/regression/cbmc/Bool/bool6.desc b/regression/cbmc/Bool/bool6.desc
index cf5bb8c2839..59c4d81608f 100644
--- a/regression/cbmc/Bool/bool6.desc
+++ b/regression/cbmc/Bool/bool6.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 bool6.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Boolean_Guards1/test.desc b/regression/cbmc/Boolean_Guards1/test.desc
index 6e36fa13566..da239c1965b 100644
--- a/regression/cbmc/Boolean_Guards1/test.desc
+++ b/regression/cbmc/Boolean_Guards1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --bounds-check --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/CMakeLists.txt b/regression/cbmc/CMakeLists.txt
index 6d346838652..b0de5320280 100644
--- a/regression/cbmc/CMakeLists.txt
+++ b/regression/cbmc/CMakeLists.txt
@@ -30,11 +30,11 @@ add_test_pl_profile(
     "CORE"
 )
 
-# If `-I` (include flag) is passed, test.pl will run only the tests matching the label following it.
+# If `-X` (exclude flag) is passed, test.pl will exclude the tests matching the label following it.
 add_test_pl_profile(
   "cbmc-new-smt-backend"
   "$<TARGET_FILE:cbmc> --incremental-smt2-solver 'z3 --smt2 -in'"
-  "${gcc_only_string}-I;new-smt-backend;-s;new-smt-backend"
+  "${gcc_only_string}-X;no-new-smt;-s;new-smt-backend"
   "CORE"
 )
 
diff --git a/regression/cbmc/Computed-Goto1/test.desc b/regression/cbmc/Computed-Goto1/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Computed-Goto1/test.desc
+++ b/regression/cbmc/Computed-Goto1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Division1/test.desc b/regression/cbmc/Division1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Division1/test.desc
+++ b/regression/cbmc/Division1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Division2/test.desc b/regression/cbmc/Division2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Division2/test.desc
+++ b/regression/cbmc/Division2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Ellipsis1/test.desc b/regression/cbmc/Ellipsis1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Ellipsis1/test.desc
+++ b/regression/cbmc/Ellipsis1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Ellipsis2/test.desc b/regression/cbmc/Ellipsis2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Ellipsis2/test.desc
+++ b/regression/cbmc/Ellipsis2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Empty_struct1/test.desc b/regression/cbmc/Empty_struct1/test.desc
index 4de445f0439..83b8819429a 100644
--- a/regression/cbmc/Empty_struct1/test.desc
+++ b/regression/cbmc/Empty_struct1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Empty_struct2/test.desc b/regression/cbmc/Empty_struct2/test.desc
index 4de445f0439..83b8819429a 100644
--- a/regression/cbmc/Empty_struct2/test.desc
+++ b/regression/cbmc/Empty_struct2/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Empty_struct3/test.desc b/regression/cbmc/Empty_struct3/test.desc
index 438e04f17c1..3cc54906e1b 100644
--- a/regression/cbmc/Empty_struct3/test.desc
+++ b/regression/cbmc/Empty_struct3/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 --json-ui
 VERIFICATION FAILED
diff --git a/regression/cbmc/End_thread1/test.desc b/regression/cbmc/End_thread1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/End_thread1/test.desc
+++ b/regression/cbmc/End_thread1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Endianness1/test.desc b/regression/cbmc/Endianness1/test.desc
index 91f07e669da..217eac96e2f 100644
--- a/regression/cbmc/Endianness1/test.desc
+++ b/regression/cbmc/Endianness1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Endianness2/test.desc b/regression/cbmc/Endianness2/test.desc
index c6c44885fb0..4f2eebc5e15 100644
--- a/regression/cbmc/Endianness2/test.desc
+++ b/regression/cbmc/Endianness2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Endianness3/test.desc b/regression/cbmc/Endianness3/test.desc
index 91f07e669da..217eac96e2f 100644
--- a/regression/cbmc/Endianness3/test.desc
+++ b/regression/cbmc/Endianness3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Endianness4/test.desc b/regression/cbmc/Endianness4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Endianness4/test.desc
+++ b/regression/cbmc/Endianness4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Endianness5/test.desc b/regression/cbmc/Endianness5/test.desc
index e15727d18a8..4e90da351ba 100644
--- a/regression/cbmc/Endianness5/test.desc
+++ b/regression/cbmc/Endianness5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Endianness6/test.desc b/regression/cbmc/Endianness6/test.desc
index 9457c6a3fd8..81ceb4c6dc0 100644
--- a/regression/cbmc/Endianness6/test.desc
+++ b/regression/cbmc/Endianness6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Endianness7/test.desc b/regression/cbmc/Endianness7/test.desc
index a1d9aa1f8a4..54056d719c9 100644
--- a/regression/cbmc/Endianness7/test.desc
+++ b/regression/cbmc/Endianness7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --big-endian --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Endianness8/test.desc b/regression/cbmc/Endianness8/test.desc
index 9457c6a3fd8..81ceb4c6dc0 100644
--- a/regression/cbmc/Endianness8/test.desc
+++ b/regression/cbmc/Endianness8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Endianness9/test.desc b/regression/cbmc/Endianness9/test.desc
index 9457c6a3fd8..81ceb4c6dc0 100644
--- a/regression/cbmc/Endianness9/test.desc
+++ b/regression/cbmc/Endianness9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Error_Label1/test.desc b/regression/cbmc/Error_Label1/test.desc
index 16eda50f23d..e14ade773e5 100644
--- a/regression/cbmc/Error_Label1/test.desc
+++ b/regression/cbmc/Error_Label1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --error-label ERROR
 ^EXIT=10$
diff --git a/regression/cbmc/Error_Label2/test.desc b/regression/cbmc/Error_Label2/test.desc
index 9d238204565..3631d5c8930 100644
--- a/regression/cbmc/Error_Label2/test.desc
+++ b/regression/cbmc/Error_Label2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --error-label ERROR --no-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/Error_Label3/test.desc b/regression/cbmc/Error_Label3/test.desc
index 1328552a8c1..450e47883c7 100644
--- a/regression/cbmc/Error_Label3/test.desc
+++ b/regression/cbmc/Error_Label3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --error-label ERROR1 --error-label ERROR2
 ^EXIT=10$
diff --git a/regression/cbmc/Eval_Order1/test.desc b/regression/cbmc/Eval_Order1/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Eval_Order1/test.desc
+++ b/regression/cbmc/Eval_Order1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Exceptions1/test.desc b/regression/cbmc/Exceptions1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Exceptions1/test.desc
+++ b/regression/cbmc/Exceptions1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Failed_Symbols1/test.desc b/regression/cbmc/Failed_Symbols1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Failed_Symbols1/test.desc
+++ b/regression/cbmc/Failed_Symbols1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Failing_Assert1/dimacs.desc b/regression/cbmc/Failing_Assert1/dimacs.desc
index 6a74ab39bd1..75036ccd09d 100644
--- a/regression/cbmc/Failing_Assert1/dimacs.desc
+++ b/regression/cbmc/Failing_Assert1/dimacs.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --dimacs
 ^Runtime decision procedure: [0-9]+(\.[0-9]+)?(e-[0-9]+)?s$
diff --git a/regression/cbmc/Failing_Assert1/external-z3.desc b/regression/cbmc/Failing_Assert1/external-z3.desc
index 0ca9b64dc45..3de382ca821 100644
--- a/regression/cbmc/Failing_Assert1/external-z3.desc
+++ b/regression/cbmc/Failing_Assert1/external-z3.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 --external-sat-solver ./z3-wrapper.sh --trace
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/Failing_Assert1/test.desc b/regression/cbmc/Failing_Assert1/test.desc
index f343f6c411b..f777601a25f 100644
--- a/regression/cbmc/Failing_Assert1/test.desc
+++ b/regression/cbmc/Failing_Assert1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --verbosity 8
 ^EXIT=10$
diff --git a/regression/cbmc/Fixedbv1/test.desc b/regression/cbmc/Fixedbv1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Fixedbv1/test.desc
+++ b/regression/cbmc/Fixedbv1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Fixedbv2/test.desc b/regression/cbmc/Fixedbv2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Fixedbv2/test.desc
+++ b/regression/cbmc/Fixedbv2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Fixedbv3/test.desc b/regression/cbmc/Fixedbv3/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Fixedbv3/test.desc
+++ b/regression/cbmc/Fixedbv3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Fixedbv4/test.desc b/regression/cbmc/Fixedbv4/test.desc
index 6692af3d55d..65535fe6331 100644
--- a/regression/cbmc/Fixedbv4/test.desc
+++ b/regression/cbmc/Fixedbv4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Fixedbv5/test.desc b/regression/cbmc/Fixedbv5/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Fixedbv5/test.desc
+++ b/regression/cbmc/Fixedbv5/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Fixedbv6/test.desc b/regression/cbmc/Fixedbv6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Fixedbv6/test.desc
+++ b/regression/cbmc/Fixedbv6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Fixedbv8/test.desc b/regression/cbmc/Fixedbv8/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Fixedbv8/test.desc
+++ b/regression/cbmc/Fixedbv8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Float-div2/test.desc b/regression/cbmc/Float-div2/test.desc
index e40801d9f85..9e28fc5f807 100644
--- a/regression/cbmc/Float-div2/test.desc
+++ b/regression/cbmc/Float-div2/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float-div3/test.desc b/regression/cbmc/Float-div3/test.desc
index e40801d9f85..9e28fc5f807 100644
--- a/regression/cbmc/Float-div3/test.desc
+++ b/regression/cbmc/Float-div3/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float-equality1/test_no_equality.desc b/regression/cbmc/Float-equality1/test_no_equality.desc
index 67cb3bf2767..839bb30826b 100644
--- a/regression/cbmc/Float-equality1/test_no_equality.desc
+++ b/regression/cbmc/Float-equality1/test_no_equality.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Float-equality2/test.desc b/regression/cbmc/Float-equality2/test.desc
index 17fba7951a0..c73e5b919a8 100644
--- a/regression/cbmc/Float-equality2/test.desc
+++ b/regression/cbmc/Float-equality2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 (Starting CEGAR Loop|VCC\(s\), 0 remaining after simplification$)
diff --git a/regression/cbmc/Float-flags-no-simp1/test.desc b/regression/cbmc/Float-flags-no-simp1/test.desc
index e5b48a4a4c1..74e429efb6d 100644
--- a/regression/cbmc/Float-flags-no-simp1/test.desc
+++ b/regression/cbmc/Float-flags-no-simp1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend thorough-paths
+CORE broken-cprover-smt-backend thorough-paths no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-flags-simp1/test.desc b/regression/cbmc/Float-flags-simp1/test.desc
index 7fe9c55459b..ccfe3848438 100644
--- a/regression/cbmc/Float-flags-simp1/test.desc
+++ b/regression/cbmc/Float-flags-simp1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float-no-simp1/test.desc b/regression/cbmc/Float-no-simp1/test.desc
index ca85d6aa5f7..a81db2713bf 100644
--- a/regression/cbmc/Float-no-simp1/test.desc
+++ b/regression/cbmc/Float-no-simp1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 main.c
 --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-no-simp2/test.desc b/regression/cbmc/Float-no-simp2/test.desc
index 4d2a93e6e26..a4790755889 100644
--- a/regression/cbmc/Float-no-simp2/test.desc
+++ b/regression/cbmc/Float-no-simp2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-no-simp3/test.desc b/regression/cbmc/Float-no-simp3/test.desc
index 4d2a93e6e26..a4790755889 100644
--- a/regression/cbmc/Float-no-simp3/test.desc
+++ b/regression/cbmc/Float-no-simp3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-no-simp4/test.desc b/regression/cbmc/Float-no-simp4/test.desc
index 4d2a93e6e26..a4790755889 100644
--- a/regression/cbmc/Float-no-simp4/test.desc
+++ b/regression/cbmc/Float-no-simp4/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-no-simp5/test.desc b/regression/cbmc/Float-no-simp5/test.desc
index 8dff0290a02..1e99ead6d5a 100644
--- a/regression/cbmc/Float-no-simp5/test.desc
+++ b/regression/cbmc/Float-no-simp5/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-no-simp6/test.desc b/regression/cbmc/Float-no-simp6/test.desc
index 4d2a93e6e26..a4790755889 100644
--- a/regression/cbmc/Float-no-simp6/test.desc
+++ b/regression/cbmc/Float-no-simp6/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-no-simp7/test.desc b/regression/cbmc/Float-no-simp7/test.desc
index 4d2a93e6e26..a4790755889 100644
--- a/regression/cbmc/Float-no-simp7/test.desc
+++ b/regression/cbmc/Float-no-simp7/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-no-simp9/test.desc b/regression/cbmc/Float-no-simp9/test.desc
index e5b48a4a4c1..74e429efb6d 100644
--- a/regression/cbmc/Float-no-simp9/test.desc
+++ b/regression/cbmc/Float-no-simp9/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend thorough-paths
+CORE broken-cprover-smt-backend thorough-paths no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-overflow1/test.desc b/regression/cbmc/Float-overflow1/test.desc
index a1de3d41cf0..ec6c2758486 100644
--- a/regression/cbmc/Float-overflow1/test.desc
+++ b/regression/cbmc/Float-overflow1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv --float-overflow-check
 ^EXIT=0$
diff --git a/regression/cbmc/Float-overflow2/test.desc b/regression/cbmc/Float-overflow2/test.desc
index f7cd5fc8bf3..8e2c1634e53 100644
--- a/regression/cbmc/Float-overflow2/test.desc
+++ b/regression/cbmc/Float-overflow2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv --float-overflow-check
 ^EXIT=10$
diff --git a/regression/cbmc/Float-rounding/compile_time_rounding.desc b/regression/cbmc/Float-rounding/compile_time_rounding.desc
index 9409894732e..0a5fa2ce343 100644
--- a/regression/cbmc/Float-rounding/compile_time_rounding.desc
+++ b/regression/cbmc/Float-rounding/compile_time_rounding.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 compile_time_rounding.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Float-rounding2/test.desc b/regression/cbmc/Float-rounding2/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Float-rounding2/test.desc
+++ b/regression/cbmc/Float-rounding2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Float-smt2-1/test.desc b/regression/cbmc/Float-smt2-1/test.desc
index be435602af4..6ee214dfbab 100644
--- a/regression/cbmc/Float-smt2-1/test.desc
+++ b/regression/cbmc/Float-smt2-1/test.desc
@@ -1,4 +1,4 @@
-CORE smt-backend
+CORE smt-backend no-new-smt
 main.c
 --smt2
 ^EXIT=10$
diff --git a/regression/cbmc/Float-to-double2/test.desc b/regression/cbmc/Float-to-double2/test.desc
index 4d2a93e6e26..a4790755889 100644
--- a/regression/cbmc/Float-to-double2/test.desc
+++ b/regression/cbmc/Float-to-double2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float-to-int1/test.desc b/regression/cbmc/Float-to-int1/test.desc
index e40801d9f85..9e28fc5f807 100644
--- a/regression/cbmc/Float-to-int1/test.desc
+++ b/regression/cbmc/Float-to-int1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float-to-int2/test.desc b/regression/cbmc/Float-to-int2/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float-to-int2/test.desc
+++ b/regression/cbmc/Float-to-int2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float-to-int3/test.desc b/regression/cbmc/Float-to-int3/test.desc
index e40801d9f85..9e28fc5f807 100644
--- a/regression/cbmc/Float-to-int3/test.desc
+++ b/regression/cbmc/Float-to-int3/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float-zero-sum1/test.desc b/regression/cbmc/Float-zero-sum1/test.desc
index 8dff0290a02..1e99ead6d5a 100644
--- a/regression/cbmc/Float-zero-sum1/test.desc
+++ b/regression/cbmc/Float-zero-sum1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 --floatbv --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/Float1/test.desc b/regression/cbmc/Float1/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float1/test.desc
+++ b/regression/cbmc/Float1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float11/test.desc b/regression/cbmc/Float11/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float11/test.desc
+++ b/regression/cbmc/Float11/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float12/test.desc b/regression/cbmc/Float12/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Float12/test.desc
+++ b/regression/cbmc/Float12/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Float13/test.desc b/regression/cbmc/Float13/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Float13/test.desc
+++ b/regression/cbmc/Float13/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Float14/test.desc b/regression/cbmc/Float14/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Float14/test.desc
+++ b/regression/cbmc/Float14/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Float2/test.desc b/regression/cbmc/Float2/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float2/test.desc
+++ b/regression/cbmc/Float2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float20/test.desc b/regression/cbmc/Float20/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float20/test.desc
+++ b/regression/cbmc/Float20/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float21/test.desc b/regression/cbmc/Float21/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float21/test.desc
+++ b/regression/cbmc/Float21/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float22/test.desc b/regression/cbmc/Float22/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float22/test.desc
+++ b/regression/cbmc/Float22/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float23/test.desc b/regression/cbmc/Float23/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Float23/test.desc
+++ b/regression/cbmc/Float23/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Float24/test.desc b/regression/cbmc/Float24/test.desc
index 1306f3ad6f5..d0169afaccc 100644
--- a/regression/cbmc/Float24/test.desc
+++ b/regression/cbmc/Float24/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.i
 --win32 --xml-ui
 ^EXIT=10$
diff --git a/regression/cbmc/Float3/test.desc b/regression/cbmc/Float3/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float3/test.desc
+++ b/regression/cbmc/Float3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float4/test.desc b/regression/cbmc/Float4/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float4/test.desc
+++ b/regression/cbmc/Float4/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float5/test.desc b/regression/cbmc/Float5/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float5/test.desc
+++ b/regression/cbmc/Float5/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float6/test.desc b/regression/cbmc/Float6/test.desc
index b7d95a28215..6a9edba6d48 100644
--- a/regression/cbmc/Float6/test.desc
+++ b/regression/cbmc/Float6/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --floatbv
 ^EXIT=0$
diff --git a/regression/cbmc/Float7/test.desc b/regression/cbmc/Float7/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Float7/test.desc
+++ b/regression/cbmc/Float7/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Float8/smt.desc b/regression/cbmc/Float8/smt.desc
index 80f2f11b07f..1f0029795bf 100644
--- a/regression/cbmc/Float8/smt.desc
+++ b/regression/cbmc/Float8/smt.desc
@@ -1,4 +1,4 @@
-CORE smt-backend
+CORE smt-backend no-new-smt
 main.c
 --smt2 --fpa
 ^EXIT=0$
diff --git a/regression/cbmc/Float8/test.desc b/regression/cbmc/Float8/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Float8/test.desc
+++ b/regression/cbmc/Float8/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Free1/test.desc b/regression/cbmc/Free1/test.desc
index 25c4b7ecab8..950f6791fef 100644
--- a/regression/cbmc/Free1/test.desc
+++ b/regression/cbmc/Free1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/Free2/test.desc b/regression/cbmc/Free2/test.desc
index 7ded8494f5b..caab5ef644d 100644
--- a/regression/cbmc/Free2/test.desc
+++ b/regression/cbmc/Free2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Free3/test.desc b/regression/cbmc/Free3/test.desc
index 25c4b7ecab8..950f6791fef 100644
--- a/regression/cbmc/Free3/test.desc
+++ b/regression/cbmc/Free3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/Free4/test.desc b/regression/cbmc/Free4/test.desc
index 25c4b7ecab8..950f6791fef 100644
--- a/regression/cbmc/Free4/test.desc
+++ b/regression/cbmc/Free4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/Function-KnR1/test.desc b/regression/cbmc/Function-KnR1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function-KnR1/test.desc
+++ b/regression/cbmc/Function-KnR1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function1/test.desc b/regression/cbmc/Function1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function1/test.desc
+++ b/regression/cbmc/Function1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function10/test.desc b/regression/cbmc/Function10/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function10/test.desc
+++ b/regression/cbmc/Function10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function11/test.desc b/regression/cbmc/Function11/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function11/test.desc
+++ b/regression/cbmc/Function11/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function12/test.desc b/regression/cbmc/Function12/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function12/test.desc
+++ b/regression/cbmc/Function12/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function13/test.desc b/regression/cbmc/Function13/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function13/test.desc
+++ b/regression/cbmc/Function13/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function14/test.desc b/regression/cbmc/Function14/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function14/test.desc
+++ b/regression/cbmc/Function14/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function2/test.desc b/regression/cbmc/Function2/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Function2/test.desc
+++ b/regression/cbmc/Function2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Function3/test.desc b/regression/cbmc/Function3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function3/test.desc
+++ b/regression/cbmc/Function3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function4/test.desc b/regression/cbmc/Function4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function4/test.desc
+++ b/regression/cbmc/Function4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function5/test.desc b/regression/cbmc/Function5/test.desc
index d877a4247fb..252fc3fb47a 100644
--- a/regression/cbmc/Function5/test.desc
+++ b/regression/cbmc/Function5/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check --bounds-check
 ^SIGNAL=0$
diff --git a/regression/cbmc/Function6/test.desc b/regression/cbmc/Function6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function6/test.desc
+++ b/regression/cbmc/Function6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function7/test.desc b/regression/cbmc/Function7/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function7/test.desc
+++ b/regression/cbmc/Function7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function8/test.desc b/regression/cbmc/Function8/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Function8/test.desc
+++ b/regression/cbmc/Function8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Function9/test.desc b/regression/cbmc/Function9/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Function9/test.desc
+++ b/regression/cbmc/Function9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Function_Eval_Order2/test.desc b/regression/cbmc/Function_Eval_Order2/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Function_Eval_Order2/test.desc
+++ b/regression/cbmc/Function_Eval_Order2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Function_Pointer1/test.desc b/regression/cbmc/Function_Pointer1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function_Pointer1/test.desc
+++ b/regression/cbmc/Function_Pointer1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer10/test.desc b/regression/cbmc/Function_Pointer10/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function_Pointer10/test.desc
+++ b/regression/cbmc/Function_Pointer10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer11/test.desc b/regression/cbmc/Function_Pointer11/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Function_Pointer11/test.desc
+++ b/regression/cbmc/Function_Pointer11/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer12/test.desc b/regression/cbmc/Function_Pointer12/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function_Pointer12/test.desc
+++ b/regression/cbmc/Function_Pointer12/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer13/test.desc b/regression/cbmc/Function_Pointer13/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function_Pointer13/test.desc
+++ b/regression/cbmc/Function_Pointer13/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer14/test.desc b/regression/cbmc/Function_Pointer14/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Function_Pointer14/test.desc
+++ b/regression/cbmc/Function_Pointer14/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer15/test.desc b/regression/cbmc/Function_Pointer15/test.desc
index 6de79559914..69ea4ed48db 100644
--- a/regression/cbmc/Function_Pointer15/test.desc
+++ b/regression/cbmc/Function_Pointer15/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Function_Pointer16/test.desc b/regression/cbmc/Function_Pointer16/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Function_Pointer16/test.desc
+++ b/regression/cbmc/Function_Pointer16/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer17/test.desc b/regression/cbmc/Function_Pointer17/test.desc
index ed5e26161dc..c0bbb27f448 100644
--- a/regression/cbmc/Function_Pointer17/test.desc
+++ b/regression/cbmc/Function_Pointer17/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 1
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer18/test.desc b/regression/cbmc/Function_Pointer18/test.desc
index 386d294e198..3cd78297904 100644
--- a/regression/cbmc/Function_Pointer18/test.desc
+++ b/regression/cbmc/Function_Pointer18/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Function_Pointer19/test.desc b/regression/cbmc/Function_Pointer19/test.desc
index 22961959ca9..278f468e130 100644
--- a/regression/cbmc/Function_Pointer19/test.desc
+++ b/regression/cbmc/Function_Pointer19/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/Function_Pointer2/test.desc b/regression/cbmc/Function_Pointer2/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Function_Pointer2/test.desc
+++ b/regression/cbmc/Function_Pointer2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer3/test.desc b/regression/cbmc/Function_Pointer3/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Function_Pointer3/test.desc
+++ b/regression/cbmc/Function_Pointer3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer4/test.desc b/regression/cbmc/Function_Pointer4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function_Pointer4/test.desc
+++ b/regression/cbmc/Function_Pointer4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer5/test.desc b/regression/cbmc/Function_Pointer5/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function_Pointer5/test.desc
+++ b/regression/cbmc/Function_Pointer5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer6/test.desc b/regression/cbmc/Function_Pointer6/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Function_Pointer6/test.desc
+++ b/regression/cbmc/Function_Pointer6/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer7/test.desc b/regression/cbmc/Function_Pointer7/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Function_Pointer7/test.desc
+++ b/regression/cbmc/Function_Pointer7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Function_Pointer8/test.desc b/regression/cbmc/Function_Pointer8/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Function_Pointer8/test.desc
+++ b/regression/cbmc/Function_Pointer8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Function_Pointer9/test.desc b/regression/cbmc/Function_Pointer9/test.desc
index 33900ad2b78..028f7170892 100644
--- a/regression/cbmc/Function_Pointer9/test.desc
+++ b/regression/cbmc/Function_Pointer9/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Function_Pointer_Init_No_Candidate/test.desc b/regression/cbmc/Function_Pointer_Init_No_Candidate/test.desc
index a2ee87339e2..01bd38d3647 100644
--- a/regression/cbmc/Function_Pointer_Init_No_Candidate/test.desc
+++ b/regression/cbmc/Function_Pointer_Init_No_Candidate/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --function foo --pointer-check
 ^\[foo.assertion.\d+\] line \d+ assertion other_function\(4\) > 5: SUCCESS$
diff --git a/regression/cbmc/Function_Pointer_Init_One_Candidate/test.desc b/regression/cbmc/Function_Pointer_Init_One_Candidate/test.desc
index b0e774c5ed5..82355e72ed9 100644
--- a/regression/cbmc/Function_Pointer_Init_One_Candidate/test.desc
+++ b/regression/cbmc/Function_Pointer_Init_One_Candidate/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --function foo
 ^\[foo.assertion.\d+\] line \d+ assertion other_function\(4\) == 5: FAILURE$
diff --git a/regression/cbmc/Function_Pointer_Init_Two_Candidates/test.desc b/regression/cbmc/Function_Pointer_Init_Two_Candidates/test.desc
index 8becf23aa28..20467d9982b 100644
--- a/regression/cbmc/Function_Pointer_Init_Two_Candidates/test.desc
+++ b/regression/cbmc/Function_Pointer_Init_Two_Candidates/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --function foo
 ^\[foo.assertion.\d+\] line \d+ assertion other_function\(4\) == 5: FAILURE$
diff --git a/regression/cbmc/Global_Initialization1/test.desc b/regression/cbmc/Global_Initialization1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Global_Initialization1/test.desc
+++ b/regression/cbmc/Global_Initialization1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Global_Initialization2/test.desc b/regression/cbmc/Global_Initialization2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Global_Initialization2/test.desc
+++ b/regression/cbmc/Global_Initialization2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Initialization1/test.desc b/regression/cbmc/Initialization1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Initialization1/test.desc
+++ b/regression/cbmc/Initialization1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Initialization2/test.desc b/regression/cbmc/Initialization2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Initialization2/test.desc
+++ b/regression/cbmc/Initialization2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Initialization3/test.desc b/regression/cbmc/Initialization3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Initialization3/test.desc
+++ b/regression/cbmc/Initialization3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Initialization5/test.desc b/regression/cbmc/Initialization5/test.desc
index 6de79559914..69ea4ed48db 100644
--- a/regression/cbmc/Initialization5/test.desc
+++ b/regression/cbmc/Initialization5/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Initialization6/test.desc b/regression/cbmc/Initialization6/test.desc
index 33900ad2b78..028f7170892 100644
--- a/regression/cbmc/Initialization6/test.desc
+++ b/regression/cbmc/Initialization6/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Initialization7/test.desc b/regression/cbmc/Initialization7/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Initialization7/test.desc
+++ b/regression/cbmc/Initialization7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/KnR1/test.desc b/regression/cbmc/KnR1/test.desc
index 1f2c73a7350..574296748f3 100644
--- a/regression/cbmc/KnR1/test.desc
+++ b/regression/cbmc/KnR1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Linked_List1/test.desc b/regression/cbmc/Linked_List1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Linked_List1/test.desc
+++ b/regression/cbmc/Linked_List1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Linking1/test.desc b/regression/cbmc/Linking1/test.desc
index 645f563290d..af20f90c655 100644
--- a/regression/cbmc/Linking1/test.desc
+++ b/regression/cbmc/Linking1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 module.c
 ^EXIT=0$
diff --git a/regression/cbmc/Linking2/test.desc b/regression/cbmc/Linking2/test.desc
index 645f563290d..af20f90c655 100644
--- a/regression/cbmc/Linking2/test.desc
+++ b/regression/cbmc/Linking2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 module.c
 ^EXIT=0$
diff --git a/regression/cbmc/Linking3/test.desc b/regression/cbmc/Linking3/test.desc
index ca176b4ad69..bb271770fef 100644
--- a/regression/cbmc/Linking3/test.desc
+++ b/regression/cbmc/Linking3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main1.c
 main2.c
 ^EXIT=0$
diff --git a/regression/cbmc/Linking4/test.desc b/regression/cbmc/Linking4/test.desc
index eeb440dc546..d88e6744dbd 100644
--- a/regression/cbmc/Linking4/test.desc
+++ b/regression/cbmc/Linking4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 link1.c
 link2.c
 ^EXIT=0$
diff --git a/regression/cbmc/Linking5/test.desc b/regression/cbmc/Linking5/test.desc
index eeb440dc546..d88e6744dbd 100644
--- a/regression/cbmc/Linking5/test.desc
+++ b/regression/cbmc/Linking5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 link1.c
 link2.c
 ^EXIT=0$
diff --git a/regression/cbmc/Linking6/test.desc b/regression/cbmc/Linking6/test.desc
index a5e0ad27fd7..67f1dd7303f 100644
--- a/regression/cbmc/Linking6/test.desc
+++ b/regression/cbmc/Linking6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 module.c --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Linking7/member-name-mismatch.desc b/regression/cbmc/Linking7/member-name-mismatch.desc
index 3ed8ac3b6e2..e29ec41a04d 100644
--- a/regression/cbmc/Linking7/member-name-mismatch.desc
+++ b/regression/cbmc/Linking7/member-name-mismatch.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 module2.c
 ^EXIT=10$
diff --git a/regression/cbmc/Linking7/return_type.desc b/regression/cbmc/Linking7/return_type.desc
index 09e102a87c1..e51bc4611dd 100644
--- a/regression/cbmc/Linking7/return_type.desc
+++ b/regression/cbmc/Linking7/return_type.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 return_type1.c
 return_type2.c
 ^EXIT=0$
diff --git a/regression/cbmc/Linking7/test.desc b/regression/cbmc/Linking7/test.desc
index 2917ed7e4f6..ea855e83c8f 100644
--- a/regression/cbmc/Linking7/test.desc
+++ b/regression/cbmc/Linking7/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 module.c
 ^EXIT=10$
diff --git a/regression/cbmc/Linking8/test.desc b/regression/cbmc/Linking8/test.desc
index d2e73a08fe0..ebb8d9d1d71 100644
--- a/regression/cbmc/Linking8/test.desc
+++ b/regression/cbmc/Linking8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 b.c
 a.c --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Local_out_of_scope1/test.desc b/regression/cbmc/Local_out_of_scope1/test.desc
index 25c4b7ecab8..950f6791fef 100644
--- a/regression/cbmc/Local_out_of_scope1/test.desc
+++ b/regression/cbmc/Local_out_of_scope1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/Local_out_of_scope2/test.desc b/regression/cbmc/Local_out_of_scope2/test.desc
index b59d561e220..6de79559914 100644
--- a/regression/cbmc/Local_out_of_scope2/test.desc
+++ b/regression/cbmc/Local_out_of_scope2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Local_out_of_scope3/test.desc b/regression/cbmc/Local_out_of_scope3/test.desc
index b59d561e220..6de79559914 100644
--- a/regression/cbmc/Local_out_of_scope3/test.desc
+++ b/regression/cbmc/Local_out_of_scope3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Local_out_of_scope4/test.desc b/regression/cbmc/Local_out_of_scope4/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Local_out_of_scope4/test.desc
+++ b/regression/cbmc/Local_out_of_scope4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Makefile b/regression/cbmc/Makefile
index a633d3cbaa9..e5777ce8774 100644
--- a/regression/cbmc/Makefile
+++ b/regression/cbmc/Makefile
@@ -31,7 +31,7 @@ test-paths-lifo:
 
 test-new-smt-backend:
 	@../test.pl -e -p -c "../../../src/cbmc/cbmc --incremental-smt2-solver 'z3 --smt2 -in'" \
-					  -I new-smt-backend \
+					  -X no-new-smt \
 					  -s new-smt-backend $(GCC_ONLY)
 
 tests.log: ../test.pl test
diff --git a/regression/cbmc/Malloc1/test.desc b/regression/cbmc/Malloc1/test.desc
index f2d081192ad..7561cd38b9b 100644
--- a/regression/cbmc/Malloc1/test.desc
+++ b/regression/cbmc/Malloc1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc10/test.desc b/regression/cbmc/Malloc10/test.desc
index 7561cd38b9b..98ec2212e40 100644
--- a/regression/cbmc/Malloc10/test.desc
+++ b/regression/cbmc/Malloc10/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc11/slice-formula.desc b/regression/cbmc/Malloc11/slice-formula.desc
index 7e1503c5880..5b5af79ac60 100644
--- a/regression/cbmc/Malloc11/slice-formula.desc
+++ b/regression/cbmc/Malloc11/slice-formula.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --slice-formula
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc11/test.desc b/regression/cbmc/Malloc11/test.desc
index f2d081192ad..7561cd38b9b 100644
--- a/regression/cbmc/Malloc11/test.desc
+++ b/regression/cbmc/Malloc11/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc13/test.desc b/regression/cbmc/Malloc13/test.desc
index ccde4872657..f3145b289ad 100644
--- a/regression/cbmc/Malloc13/test.desc
+++ b/regression/cbmc/Malloc13/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc14/test.desc b/regression/cbmc/Malloc14/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/Malloc14/test.desc
+++ b/regression/cbmc/Malloc14/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc15/test.desc b/regression/cbmc/Malloc15/test.desc
index 7a519ed648a..a1b2c8b18ec 100644
--- a/regression/cbmc/Malloc15/test.desc
+++ b/regression/cbmc/Malloc15/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --32
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc16/test.desc b/regression/cbmc/Malloc16/test.desc
index 7a519ed648a..a1b2c8b18ec 100644
--- a/regression/cbmc/Malloc16/test.desc
+++ b/regression/cbmc/Malloc16/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --32
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc17/test.desc b/regression/cbmc/Malloc17/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/Malloc17/test.desc
+++ b/regression/cbmc/Malloc17/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc18/test.desc b/regression/cbmc/Malloc18/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/Malloc18/test.desc
+++ b/regression/cbmc/Malloc18/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc19/test.desc b/regression/cbmc/Malloc19/test.desc
index 9c96469df12..6e8c19959c9 100644
--- a/regression/cbmc/Malloc19/test.desc
+++ b/regression/cbmc/Malloc19/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc2/test.desc b/regression/cbmc/Malloc2/test.desc
index f2d081192ad..7561cd38b9b 100644
--- a/regression/cbmc/Malloc2/test.desc
+++ b/regression/cbmc/Malloc2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc21/test.desc b/regression/cbmc/Malloc21/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/Malloc21/test.desc
+++ b/regression/cbmc/Malloc21/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc22/test.desc b/regression/cbmc/Malloc22/test.desc
index 42f6c48b22e..11c11d90c5c 100644
--- a/regression/cbmc/Malloc22/test.desc
+++ b/regression/cbmc/Malloc22/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 2 --smt2 --outfile main.smt2
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc23/test.desc b/regression/cbmc/Malloc23/test.desc
index afc24e98c7c..39d94af76fd 100644
--- a/regression/cbmc/Malloc23/test.desc
+++ b/regression/cbmc/Malloc23/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/Malloc24/test.desc b/regression/cbmc/Malloc24/test.desc
index b5dc4690136..cf64d363c65 100644
--- a/regression/cbmc/Malloc24/test.desc
+++ b/regression/cbmc/Malloc24/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 4 --pointer-check --unwinding-assertions
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc25/test.desc b/regression/cbmc/Malloc25/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Malloc25/test.desc
+++ b/regression/cbmc/Malloc25/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc3/test.desc b/regression/cbmc/Malloc3/test.desc
index 25c4b7ecab8..950f6791fef 100644
--- a/regression/cbmc/Malloc3/test.desc
+++ b/regression/cbmc/Malloc3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/Malloc4/test.desc b/regression/cbmc/Malloc4/test.desc
index 6c032458ae9..ac6b317a781 100644
--- a/regression/cbmc/Malloc4/test.desc
+++ b/regression/cbmc/Malloc4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^SIGNAL=0$
diff --git a/regression/cbmc/Malloc5/test.desc b/regression/cbmc/Malloc5/test.desc
index 2a968fbee97..72b27267062 100644
--- a/regression/cbmc/Malloc5/test.desc
+++ b/regression/cbmc/Malloc5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^SIGNAL=0$
diff --git a/regression/cbmc/Malloc6/test.desc b/regression/cbmc/Malloc6/test.desc
index f2d081192ad..7561cd38b9b 100644
--- a/regression/cbmc/Malloc6/test.desc
+++ b/regression/cbmc/Malloc6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc7/test.desc b/regression/cbmc/Malloc7/test.desc
index f2d081192ad..7561cd38b9b 100644
--- a/regression/cbmc/Malloc7/test.desc
+++ b/regression/cbmc/Malloc7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Malloc8/test.desc b/regression/cbmc/Malloc8/test.desc
index 95528fabef5..c9624642ea9 100644
--- a/regression/cbmc/Malloc8/test.desc
+++ b/regression/cbmc/Malloc8/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/Malloc9/test.desc b/regression/cbmc/Malloc9/test.desc
index f2d081192ad..7561cd38b9b 100644
--- a/regression/cbmc/Malloc9/test.desc
+++ b/regression/cbmc/Malloc9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Memory_leak1/test.desc b/regression/cbmc/Memory_leak1/test.desc
index 91591a9814c..8e445aa67b4 100644
--- a/regression/cbmc/Memory_leak1/test.desc
+++ b/regression/cbmc/Memory_leak1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --memory-leak-check
 ^EXIT=10$
diff --git a/regression/cbmc/Memory_leak2/test.desc b/regression/cbmc/Memory_leak2/test.desc
index f90f7c4f8f1..2510787038a 100644
--- a/regression/cbmc/Memory_leak2/test.desc
+++ b/regression/cbmc/Memory_leak2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --memory-leak-check
 ^EXIT=0$
diff --git a/regression/cbmc/Memory_leak_abort/test.desc b/regression/cbmc/Memory_leak_abort/test.desc
index 4e2fcc003e6..7c77b3769c1 100644
--- a/regression/cbmc/Memory_leak_abort/test.desc
+++ b/regression/cbmc/Memory_leak_abort/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --memory-leak-check --memory-cleanup-check --no-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/Minisat_Simp1/test.desc b/regression/cbmc/Minisat_Simp1/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Minisat_Simp1/test.desc
+++ b/regression/cbmc/Minisat_Simp1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Mod1/test.desc b/regression/cbmc/Mod1/test.desc
index b59d561e220..6de79559914 100644
--- a/regression/cbmc/Mod1/test.desc
+++ b/regression/cbmc/Mod1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Mod2/test.desc b/regression/cbmc/Mod2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Mod2/test.desc
+++ b/regression/cbmc/Mod2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Multi_Dimensional_Array1/test.desc b/regression/cbmc/Multi_Dimensional_Array1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Multi_Dimensional_Array1/test.desc
+++ b/regression/cbmc/Multi_Dimensional_Array1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Multi_Dimensional_Array2/test.desc b/regression/cbmc/Multi_Dimensional_Array2/test.desc
index 217a6fa6745..a5790e40f01 100644
--- a/regression/cbmc/Multi_Dimensional_Array2/test.desc
+++ b/regression/cbmc/Multi_Dimensional_Array2/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend new-smt-backend
+CORE broken-cprover-smt-backend
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Multi_Dimensional_Array3/test.desc b/regression/cbmc/Multi_Dimensional_Array3/test.desc
index d612fd9d1b6..5a1f9d2ea20 100644
--- a/regression/cbmc/Multi_Dimensional_Array3/test.desc
+++ b/regression/cbmc/Multi_Dimensional_Array3/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend new-smt-backend
+CORE broken-cprover-smt-backend
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Multi_Dimensional_Array4/test.desc b/regression/cbmc/Multi_Dimensional_Array4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Multi_Dimensional_Array4/test.desc
+++ b/regression/cbmc/Multi_Dimensional_Array4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Multi_Dimensional_Array5/test.desc b/regression/cbmc/Multi_Dimensional_Array5/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Multi_Dimensional_Array5/test.desc
+++ b/regression/cbmc/Multi_Dimensional_Array5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Multi_Dimensional_Array6/test.desc b/regression/cbmc/Multi_Dimensional_Array6/test.desc
index 56a47365d13..6694cf6e8b7 100644
--- a/regression/cbmc/Multi_Dimensional_Array6/test.desc
+++ b/regression/cbmc/Multi_Dimensional_Array6/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths new-smt-backend
+CORE thorough-paths
 main.c
 --unwind 3 --no-unwinding-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/Multiple_Properties1/test.desc b/regression/cbmc/Multiple_Properties1/test.desc
index 77fadc44fd7..beb36b219c7 100644
--- a/regression/cbmc/Multiple_Properties1/test.desc
+++ b/regression/cbmc/Multiple_Properties1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --property main.assertion.1 --property main.assertion.3
 activate-multi-line-match
diff --git a/regression/cbmc/Negation1/test.desc b/regression/cbmc/Negation1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Negation1/test.desc
+++ b/regression/cbmc/Negation1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Negation2/test.desc b/regression/cbmc/Negation2/test.desc
index a78313a26b8..cbd90510599 100644
--- a/regression/cbmc/Negation2/test.desc
+++ b/regression/cbmc/Negation2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-propagation
 ^EXIT=0$
diff --git a/regression/cbmc/Nondet1/test.desc b/regression/cbmc/Nondet1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Nondet1/test.desc
+++ b/regression/cbmc/Nondet1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer1/test.desc b/regression/cbmc/Pointer1/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer1/test.desc
+++ b/regression/cbmc/Pointer1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer10/test.desc b/regression/cbmc/Pointer10/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer10/test.desc
+++ b/regression/cbmc/Pointer10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer11/test.desc b/regression/cbmc/Pointer11/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer11/test.desc
+++ b/regression/cbmc/Pointer11/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer12/test.desc b/regression/cbmc/Pointer12/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer12/test.desc
+++ b/regression/cbmc/Pointer12/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer14/test.desc b/regression/cbmc/Pointer14/test.desc
index 350a589e4a6..b7aa820f6bb 100644
--- a/regression/cbmc/Pointer14/test.desc
+++ b/regression/cbmc/Pointer14/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/Pointer15/test.desc b/regression/cbmc/Pointer15/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer15/test.desc
+++ b/regression/cbmc/Pointer15/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer17/test.desc b/regression/cbmc/Pointer17/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer17/test.desc
+++ b/regression/cbmc/Pointer17/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer18/full-slice.desc b/regression/cbmc/Pointer18/full-slice.desc
index f3b62857e9e..37c7526ffee 100644
--- a/regression/cbmc/Pointer18/full-slice.desc
+++ b/regression/cbmc/Pointer18/full-slice.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 1 --no-unwinding-assertions --pointer-check --full-slice
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer18/test.desc b/regression/cbmc/Pointer18/test.desc
index ecf5b01e3d6..0b21ec028ac 100644
--- a/regression/cbmc/Pointer18/test.desc
+++ b/regression/cbmc/Pointer18/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 1 --no-unwinding-assertions --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer2/test.desc b/regression/cbmc/Pointer2/test.desc
index 2965c901fc3..bce3fcb7f95 100644
--- a/regression/cbmc/Pointer2/test.desc
+++ b/regression/cbmc/Pointer2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/Pointer20/test.desc b/regression/cbmc/Pointer20/test.desc
index 49c3899266f..a0af87d2c09 100644
--- a/regression/cbmc/Pointer20/test.desc
+++ b/regression/cbmc/Pointer20/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^SIGNAL=0$
diff --git a/regression/cbmc/Pointer21/test.desc b/regression/cbmc/Pointer21/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer21/test.desc
+++ b/regression/cbmc/Pointer21/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer23/test.desc b/regression/cbmc/Pointer23/test.desc
index 49c3899266f..a0af87d2c09 100644
--- a/regression/cbmc/Pointer23/test.desc
+++ b/regression/cbmc/Pointer23/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^SIGNAL=0$
diff --git a/regression/cbmc/Pointer24/test.desc b/regression/cbmc/Pointer24/test.desc
index 39c491ba8bb..d9a7678b126 100644
--- a/regression/cbmc/Pointer24/test.desc
+++ b/regression/cbmc/Pointer24/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer25/test.desc b/regression/cbmc/Pointer25/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Pointer25/test.desc
+++ b/regression/cbmc/Pointer25/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer26/test.desc b/regression/cbmc/Pointer26/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Pointer26/test.desc
+++ b/regression/cbmc/Pointer26/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer27/test.desc b/regression/cbmc/Pointer27/test.desc
index 17695a197ac..2cd3abc5c32 100644
--- a/regression/cbmc/Pointer27/test.desc
+++ b/regression/cbmc/Pointer27/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^SIGNAL=0$
diff --git a/regression/cbmc/Pointer28/test.desc b/regression/cbmc/Pointer28/test.desc
index f5e039ba3ed..09aaafc1c87 100644
--- a/regression/cbmc/Pointer28/test.desc
+++ b/regression/cbmc/Pointer28/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer29/test.desc b/regression/cbmc/Pointer29/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Pointer29/test.desc
+++ b/regression/cbmc/Pointer29/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer3/test.desc b/regression/cbmc/Pointer3/test.desc
index 49c3899266f..a0af87d2c09 100644
--- a/regression/cbmc/Pointer3/test.desc
+++ b/regression/cbmc/Pointer3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^SIGNAL=0$
diff --git a/regression/cbmc/Pointer30/test.desc b/regression/cbmc/Pointer30/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer30/test.desc
+++ b/regression/cbmc/Pointer30/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer31/test.desc b/regression/cbmc/Pointer31/test.desc
index 49c3899266f..a0af87d2c09 100644
--- a/regression/cbmc/Pointer31/test.desc
+++ b/regression/cbmc/Pointer31/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^SIGNAL=0$
diff --git a/regression/cbmc/Pointer4/test.desc b/regression/cbmc/Pointer4/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer4/test.desc
+++ b/regression/cbmc/Pointer4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer6/test.desc b/regression/cbmc/Pointer6/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer6/test.desc
+++ b/regression/cbmc/Pointer6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer7/test.desc b/regression/cbmc/Pointer7/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer7/test.desc
+++ b/regression/cbmc/Pointer7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer8/test.desc b/regression/cbmc/Pointer8/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer8/test.desc
+++ b/regression/cbmc/Pointer8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer9/test.desc b/regression/cbmc/Pointer9/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer9/test.desc
+++ b/regression/cbmc/Pointer9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic1/test.desc b/regression/cbmc/Pointer_Arithmetic1/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer_Arithmetic1/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic10/test.desc b/regression/cbmc/Pointer_Arithmetic10/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer_Arithmetic10/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic11/test.desc b/regression/cbmc/Pointer_Arithmetic11/test.desc
index 89e898790d4..f5e039ba3ed 100644
--- a/regression/cbmc/Pointer_Arithmetic11/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic11/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic12/test.desc b/regression/cbmc/Pointer_Arithmetic12/test.desc
index 59cb00eeef9..b3a154d150b 100644
--- a/regression/cbmc/Pointer_Arithmetic12/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic12/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --32 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic14/test.desc b/regression/cbmc/Pointer_Arithmetic14/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Pointer_Arithmetic14/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic14/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic15/test.desc b/regression/cbmc/Pointer_Arithmetic15/test.desc
index 1c32ff1427b..95f0fe0bf7f 100644
--- a/regression/cbmc/Pointer_Arithmetic15/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic15/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Pointer_Arithmetic16/test.desc b/regression/cbmc/Pointer_Arithmetic16/test.desc
index 2377020c65b..34e9937c5ed 100644
--- a/regression/cbmc/Pointer_Arithmetic16/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic16/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Pointer_Arithmetic17/test.desc b/regression/cbmc/Pointer_Arithmetic17/test.desc
index ed1cdd73006..c50a02a2204 100644
--- a/regression/cbmc/Pointer_Arithmetic17/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic17/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic19/test.desc b/regression/cbmc/Pointer_Arithmetic19/test.desc
index 62a5ca76c88..23ecab6dc6a 100644
--- a/regression/cbmc/Pointer_Arithmetic19/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic19/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --program-only
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic2/test.desc b/regression/cbmc/Pointer_Arithmetic2/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer_Arithmetic2/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic3/test.desc b/regression/cbmc/Pointer_Arithmetic3/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer_Arithmetic3/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic4/test.desc b/regression/cbmc/Pointer_Arithmetic4/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer_Arithmetic4/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic5/test.desc b/regression/cbmc/Pointer_Arithmetic5/test.desc
index 4861061b8e0..f9c919bbdc2 100644
--- a/regression/cbmc/Pointer_Arithmetic5/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check --function f
 ^EXIT=10$
diff --git a/regression/cbmc/Pointer_Arithmetic6/test.desc b/regression/cbmc/Pointer_Arithmetic6/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer_Arithmetic6/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic7/test.desc b/regression/cbmc/Pointer_Arithmetic7/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer_Arithmetic7/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Arithmetic8/test.desc b/regression/cbmc/Pointer_Arithmetic8/test.desc
index 12fbfc53750..4b9176a942e 100644
--- a/regression/cbmc/Pointer_Arithmetic8/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^EXIT=10$
diff --git a/regression/cbmc/Pointer_Arithmetic9/test.desc b/regression/cbmc/Pointer_Arithmetic9/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Pointer_Arithmetic9/test.desc
+++ b/regression/cbmc/Pointer_Arithmetic9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Assume1/test.desc b/regression/cbmc/Pointer_Assume1/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/Pointer_Assume1/test.desc
+++ b/regression/cbmc/Pointer_Assume1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_Object_Type1/test.desc b/regression/cbmc/Pointer_Object_Type1/test.desc
index 5bc937da3ce..d3aaf765740 100644
--- a/regression/cbmc/Pointer_Object_Type1/test.desc
+++ b/regression/cbmc/Pointer_Object_Type1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^SIGNAL=0$
diff --git a/regression/cbmc/Pointer_array1/test.desc b/regression/cbmc/Pointer_array1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Pointer_array1/test.desc
+++ b/regression/cbmc/Pointer_array1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_array2/test.desc b/regression/cbmc/Pointer_array2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Pointer_array2/test.desc
+++ b/regression/cbmc/Pointer_array2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_array3/test.desc b/regression/cbmc/Pointer_array3/test.desc
index a7e9cb00446..33c89987cc7 100644
--- a/regression/cbmc/Pointer_array3/test.desc
+++ b/regression/cbmc/Pointer_array3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --no-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/Pointer_array4/test.desc b/regression/cbmc/Pointer_array4/test.desc
index 0c98ed635a3..35cc9d3cd74 100644
--- a/regression/cbmc/Pointer_array4/test.desc
+++ b/regression/cbmc/Pointer_array4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --32
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_array5/test.desc b/regression/cbmc/Pointer_array5/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Pointer_array5/test.desc
+++ b/regression/cbmc/Pointer_array5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_array6/test.desc b/regression/cbmc/Pointer_array6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Pointer_array6/test.desc
+++ b/regression/cbmc/Pointer_array6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_array7/big-endian.desc b/regression/cbmc/Pointer_array7/big-endian.desc
index 10a8d1ea50f..5d4f99dff97 100644
--- a/regression/cbmc/Pointer_array7/big-endian.desc
+++ b/regression/cbmc/Pointer_array7/big-endian.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --big-endian -DUSE_BIG_ENDIAN
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_array7/test.desc b/regression/cbmc/Pointer_array7/test.desc
index 83b98dad2d0..124ff61437b 100644
--- a/regression/cbmc/Pointer_array7/test.desc
+++ b/regression/cbmc/Pointer_array7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian -DUSE_LITTLE_ENDIAN
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_byte_extract1/test.desc b/regression/cbmc/Pointer_byte_extract1/test.desc
index ad10409bb6f..12fc8ce06e1 100644
--- a/regression/cbmc/Pointer_byte_extract1/test.desc
+++ b/regression/cbmc/Pointer_byte_extract1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_byte_extract2/test.desc b/regression/cbmc/Pointer_byte_extract2/test.desc
index af0f6ea4b3f..eb98d4f78ba 100644
--- a/regression/cbmc/Pointer_byte_extract2/test.desc
+++ b/regression/cbmc/Pointer_byte_extract2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=10$
diff --git a/regression/cbmc/Pointer_byte_extract3/test.desc b/regression/cbmc/Pointer_byte_extract3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Pointer_byte_extract3/test.desc
+++ b/regression/cbmc/Pointer_byte_extract3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_byte_extract4/program-only.desc b/regression/cbmc/Pointer_byte_extract4/program-only.desc
index 7b738a3b40b..c3b3f95041f 100644
--- a/regression/cbmc/Pointer_byte_extract4/program-only.desc
+++ b/regression/cbmc/Pointer_byte_extract4/program-only.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_byte_extract4/test.desc b/regression/cbmc/Pointer_byte_extract4/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Pointer_byte_extract4/test.desc
+++ b/regression/cbmc/Pointer_byte_extract4/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_byte_extract5/no-simplify.desc b/regression/cbmc/Pointer_byte_extract5/no-simplify.desc
index 12b18b74493..a8cdc81121f 100644
--- a/regression/cbmc/Pointer_byte_extract5/no-simplify.desc
+++ b/regression/cbmc/Pointer_byte_extract5/no-simplify.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.i
 --bounds-check --32 --no-simplify
 ^EXIT=10$
diff --git a/regression/cbmc/Pointer_byte_extract5/test.desc b/regression/cbmc/Pointer_byte_extract5/test.desc
index 4a6b49453e9..474026934fa 100644
--- a/regression/cbmc/Pointer_byte_extract5/test.desc
+++ b/regression/cbmc/Pointer_byte_extract5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --bounds-check --32
 ^EXIT=10$
diff --git a/regression/cbmc/Pointer_byte_extract6/test.desc b/regression/cbmc/Pointer_byte_extract6/test.desc
index 00550a6e62f..466da18b2b5 100644
--- a/regression/cbmc/Pointer_byte_extract6/test.desc
+++ b/regression/cbmc/Pointer_byte_extract6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_byte_extract7/test.desc b/regression/cbmc/Pointer_byte_extract7/test.desc
index 9457c6a3fd8..81ceb4c6dc0 100644
--- a/regression/cbmc/Pointer_byte_extract7/test.desc
+++ b/regression/cbmc/Pointer_byte_extract7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_byte_extract8/test.desc b/regression/cbmc/Pointer_byte_extract8/test.desc
index 7f9ece3466d..adcea6ed3e2 100644
--- a/regression/cbmc/Pointer_byte_extract8/test.desc
+++ b/regression/cbmc/Pointer_byte_extract8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --64 --unwind 4 --unwinding-assertions
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_byte_extract9/test.desc b/regression/cbmc/Pointer_byte_extract9/test.desc
index 5a2330a5aad..0570ab7aba7 100644
--- a/regression/cbmc/Pointer_byte_extract9/test.desc
+++ b/regression/cbmc/Pointer_byte_extract9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Pointer_comparison2/test.desc b/regression/cbmc/Pointer_comparison2/test.desc
index 22961959ca9..278f468e130 100644
--- a/regression/cbmc/Pointer_comparison2/test.desc
+++ b/regression/cbmc/Pointer_comparison2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/Pointer_comparison3/test.desc b/regression/cbmc/Pointer_comparison3/test.desc
index df2a1a6b25c..4076451d3f7 100644
--- a/regression/cbmc/Pointer_comparison3/test.desc
+++ b/regression/cbmc/Pointer_comparison3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^\[main.assertion.3\] line 21 always false for different objects: FAILURE$
diff --git a/regression/cbmc/Pointer_comparison4/test.desc b/regression/cbmc/Pointer_comparison4/test.desc
index 418749c8d6e..8bbcacca0ef 100644
--- a/regression/cbmc/Pointer_comparison4/test.desc
+++ b/regression/cbmc/Pointer_comparison4/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --unwind 10 --unwinding-assertions
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/Pointer_comparison5/test.desc b/regression/cbmc/Pointer_comparison5/test.desc
index fe094259f78..e41f20ab097 100644
--- a/regression/cbmc/Pointer_comparison5/test.desc
+++ b/regression/cbmc/Pointer_comparison5/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^Generated \d+ VCC\(s\), 1 remaining after simplification$
diff --git a/regression/cbmc/Pointer_difference1/no-simplify.desc b/regression/cbmc/Pointer_difference1/no-simplify.desc
index ae0b2a16edd..2d4a398e23a 100644
--- a/regression/cbmc/Pointer_difference1/no-simplify.desc
+++ b/regression/cbmc/Pointer_difference1/no-simplify.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-simplify
 VERIFICATION SUCCESSFUL
diff --git a/regression/cbmc/Pointer_difference1/test.desc b/regression/cbmc/Pointer_difference1/test.desc
index 00550a6e62f..466da18b2b5 100644
--- a/regression/cbmc/Pointer_difference1/test.desc
+++ b/regression/cbmc/Pointer_difference1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Pointer_difference2/test.desc b/regression/cbmc/Pointer_difference2/test.desc
index 3bf4cfce768..36d9e01f3cf 100644
--- a/regression/cbmc/Pointer_difference2/test.desc
+++ b/regression/cbmc/Pointer_difference2/test.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 main.c
 --pointer-check
 ^\[main.assertion.1\] line 6 correct: SUCCESS
diff --git a/regression/cbmc/Promotion1/test.desc b/regression/cbmc/Promotion1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Promotion1/test.desc
+++ b/regression/cbmc/Promotion1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Promotion2/test.desc b/regression/cbmc/Promotion2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Promotion2/test.desc
+++ b/regression/cbmc/Promotion2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Promotion3/test.desc b/regression/cbmc/Promotion3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Promotion3/test.desc
+++ b/regression/cbmc/Promotion3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Promotion4/test.desc b/regression/cbmc/Promotion4/test.desc
index 42e327ad1bc..63da0758056 100644
--- a/regression/cbmc/Promotion4/test.desc
+++ b/regression/cbmc/Promotion4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --16
 ^EXIT=0$
diff --git a/regression/cbmc/Quantifiers-assertion/test.desc b/regression/cbmc/Quantifiers-assertion/test.desc
index 46ce7f990fa..17a23b4628e 100644
--- a/regression/cbmc/Quantifiers-assertion/test.desc
+++ b/regression/cbmc/Quantifiers-assertion/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-assignment/test.desc b/regression/cbmc/Quantifiers-assignment/test.desc
index 91fdb54f4e1..2c0b0b3ae32 100644
--- a/regression/cbmc/Quantifiers-assignment/test.desc
+++ b/regression/cbmc/Quantifiers-assignment/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 main.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-copy/test.desc b/regression/cbmc/Quantifiers-copy/test.desc
index 9df184ba1f9..ad846a8f439 100644
--- a/regression/cbmc/Quantifiers-copy/test.desc
+++ b/regression/cbmc/Quantifiers-copy/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-expr-cleaning/test.desc b/regression/cbmc/Quantifiers-expr-cleaning/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/Quantifiers-expr-cleaning/test.desc
+++ b/regression/cbmc/Quantifiers-expr-cleaning/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Quantifiers-if/test.desc b/regression/cbmc/Quantifiers-if/test.desc
index 0269bf6e9a7..d61553a444f 100644
--- a/regression/cbmc/Quantifiers-if/test.desc
+++ b/regression/cbmc/Quantifiers-if/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 main.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-initialisation/test.desc b/regression/cbmc/Quantifiers-initialisation/test.desc
index 13409c8fa2d..672fa68090d 100644
--- a/regression/cbmc/Quantifiers-initialisation/test.desc
+++ b/regression/cbmc/Quantifiers-initialisation/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-initialisation2/test.desc b/regression/cbmc/Quantifiers-initialisation2/test.desc
index e841114af5f..82af7c648f3 100644
--- a/regression/cbmc/Quantifiers-initialisation2/test.desc
+++ b/regression/cbmc/Quantifiers-initialisation2/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 main.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-not-exists/fixed.desc b/regression/cbmc/Quantifiers-not-exists/fixed.desc
index 98827639190..c0c0c8aaa2b 100644
--- a/regression/cbmc/Quantifiers-not-exists/fixed.desc
+++ b/regression/cbmc/Quantifiers-not-exists/fixed.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 fixed.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-not/test.desc b/regression/cbmc/Quantifiers-not/test.desc
index 50b7285586e..f930deb9f8a 100644
--- a/regression/cbmc/Quantifiers-not/test.desc
+++ b/regression/cbmc/Quantifiers-not/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 main.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-simplify/rewrite_exists.desc b/regression/cbmc/Quantifiers-simplify/rewrite_exists.desc
index aea9d163276..9b8e205c08c 100644
--- a/regression/cbmc/Quantifiers-simplify/rewrite_exists.desc
+++ b/regression/cbmc/Quantifiers-simplify/rewrite_exists.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 rewrite_exists.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/Quantifiers-simplify/rewrite_forall.desc b/regression/cbmc/Quantifiers-simplify/rewrite_forall.desc
index c4f4fadafa4..516527d0ce1 100644
--- a/regression/cbmc/Quantifiers-simplify/rewrite_forall.desc
+++ b/regression/cbmc/Quantifiers-simplify/rewrite_forall.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 rewrite_forall.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/Quantifiers-simplify/simplify_not_forall.desc b/regression/cbmc/Quantifiers-simplify/simplify_not_forall.desc
index 452c5041604..7e9a2db9699 100644
--- a/regression/cbmc/Quantifiers-simplify/simplify_not_forall.desc
+++ b/regression/cbmc/Quantifiers-simplify/simplify_not_forall.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --program-only
 ASSERT\(exists \{ signed int i!0#0; !\(i!0#0 >= 0\) \}\)$
diff --git a/regression/cbmc/Quantifiers-two-dimension-array/fixed.desc b/regression/cbmc/Quantifiers-two-dimension-array/fixed.desc
index cd06960f0aa..a39cee20077 100644
--- a/regression/cbmc/Quantifiers-two-dimension-array/fixed.desc
+++ b/regression/cbmc/Quantifiers-two-dimension-array/fixed.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 fixed.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-two-dimension-array/test.desc b/regression/cbmc/Quantifiers-two-dimension-array/test.desc
index b49da69591a..5b8451664ce 100644
--- a/regression/cbmc/Quantifiers-two-dimension-array/test.desc
+++ b/regression/cbmc/Quantifiers-two-dimension-array/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend
+CORE broken-z3-smt-backend no-new-smt
 main.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers-type2/test.desc b/regression/cbmc/Quantifiers-type2/test.desc
index b83b70d5457..a34b229ef2d 100644
--- a/regression/cbmc/Quantifiers-type2/test.desc
+++ b/regression/cbmc/Quantifiers-type2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^\*\* Results:$
diff --git a/regression/cbmc/Quantifiers1/quantifier-with-side-effect.desc b/regression/cbmc/Quantifiers1/quantifier-with-side-effect.desc
index 4c495b50792..04d89eeef82 100644
--- a/regression/cbmc/Quantifiers1/quantifier-with-side-effect.desc
+++ b/regression/cbmc/Quantifiers1/quantifier-with-side-effect.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 quantifier-with-side-effect.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/Quantifiers1/test.desc b/regression/cbmc/Quantifiers1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Quantifiers1/test.desc
+++ b/regression/cbmc/Quantifiers1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Recursion1/test.desc b/regression/cbmc/Recursion1/test.desc
index 4529b27fc92..4a9104162ed 100644
--- a/regression/cbmc/Recursion1/test.desc
+++ b/regression/cbmc/Recursion1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --unwind 11
 ^EXIT=0$
diff --git a/regression/cbmc/Recursion2/test.desc b/regression/cbmc/Recursion2/test.desc
index 4529b27fc92..4a9104162ed 100644
--- a/regression/cbmc/Recursion2/test.desc
+++ b/regression/cbmc/Recursion2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --unwind 11
 ^EXIT=0$
diff --git a/regression/cbmc/Recursion3/test.desc b/regression/cbmc/Recursion3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Recursion3/test.desc
+++ b/regression/cbmc/Recursion3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Recursion4/test.desc b/regression/cbmc/Recursion4/test.desc
index bf382a33f0f..6cb8c550fa3 100644
--- a/regression/cbmc/Recursion4/test.desc
+++ b/regression/cbmc/Recursion4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-propagation --unwind 2
 ^EXIT=0$
diff --git a/regression/cbmc/Recursion5/test.desc b/regression/cbmc/Recursion5/test.desc
index 4863f2764bc..bb6455323ca 100644
--- a/regression/cbmc/Recursion5/test.desc
+++ b/regression/cbmc/Recursion5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 2 --no-unwinding-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/Recursion6/test.desc b/regression/cbmc/Recursion6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Recursion6/test.desc
+++ b/regression/cbmc/Recursion6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/SIMD1/test.desc b/regression/cbmc/SIMD1/test.desc
index 39d9265e8a7..972a0477bd8 100644
--- a/regression/cbmc/SIMD1/test.desc
+++ b/regression/cbmc/SIMD1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Same_Basename1/test.desc b/regression/cbmc/Same_Basename1/test.desc
index 3f3fd1dd763..b7af5f0e4e4 100644
--- a/regression/cbmc/Same_Basename1/test.desc
+++ b/regression/cbmc/Same_Basename1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 bar.c
 foo/bar.c
 ^EXIT=0$
diff --git a/regression/cbmc/Sideeffects1/test.desc b/regression/cbmc/Sideeffects1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Sideeffects1/test.desc
+++ b/regression/cbmc/Sideeffects1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Sideeffects2/test.desc b/regression/cbmc/Sideeffects2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Sideeffects2/test.desc
+++ b/regression/cbmc/Sideeffects2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Sideeffects3/test.desc b/regression/cbmc/Sideeffects3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Sideeffects3/test.desc
+++ b/regression/cbmc/Sideeffects3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Sideeffects4/test.desc b/regression/cbmc/Sideeffects4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Sideeffects4/test.desc
+++ b/regression/cbmc/Sideeffects4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Sideeffects5/test.desc b/regression/cbmc/Sideeffects5/test.desc
index e4902fb709a..e69488b2e66 100644
--- a/regression/cbmc/Sideeffects5/test.desc
+++ b/regression/cbmc/Sideeffects5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --div-by-zero-check
 ^EXIT=10$
diff --git a/regression/cbmc/Sideeffects6/test.desc b/regression/cbmc/Sideeffects6/test.desc
index e4902fb709a..e69488b2e66 100644
--- a/regression/cbmc/Sideeffects6/test.desc
+++ b/regression/cbmc/Sideeffects6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --div-by-zero-check
 ^EXIT=10$
diff --git a/regression/cbmc/Sideeffects7/test.desc b/regression/cbmc/Sideeffects7/test.desc
index 32635253c4d..d201d944aa2 100644
--- a/regression/cbmc/Sideeffects7/test.desc
+++ b/regression/cbmc/Sideeffects7/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Sideeffects8/test.desc b/regression/cbmc/Sideeffects8/test.desc
index ca8c3172e2b..565f30cc839 100644
--- a/regression/cbmc/Sideeffects8/test.desc
+++ b/regression/cbmc/Sideeffects8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/Sizeof1/test.desc b/regression/cbmc/Sizeof1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Sizeof1/test.desc
+++ b/regression/cbmc/Sizeof1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Static2/test.desc b/regression/cbmc/Static2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Static2/test.desc
+++ b/regression/cbmc/Static2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Static4/test.desc b/regression/cbmc/Static4/test.desc
index a25ad4cbd93..1d4a527e6f2 100644
--- a/regression/cbmc/Static4/test.desc
+++ b/regression/cbmc/Static4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table
 ^EXIT=0$
diff --git a/regression/cbmc/Static_Functions1/test.desc b/regression/cbmc/Static_Functions1/test.desc
index 6a8056da7e4..8a09111c3b1 100644
--- a/regression/cbmc/Static_Functions1/test.desc
+++ b/regression/cbmc/Static_Functions1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 file1.c
 file2.c
 ^EXIT=0$
diff --git a/regression/cbmc/String1/test.desc b/regression/cbmc/String1/test.desc
index 5821c3e2820..96c9b4bcd7b 100644
--- a/regression/cbmc/String1/test.desc
+++ b/regression/cbmc/String1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String2/test.desc b/regression/cbmc/String2/test.desc
index 4b9176a942e..224f3ea52ea 100644
--- a/regression/cbmc/String2/test.desc
+++ b/regression/cbmc/String2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check --bounds-check
 ^EXIT=10$
diff --git a/regression/cbmc/String4/test.desc b/regression/cbmc/String4/test.desc
index 5821c3e2820..96c9b4bcd7b 100644
--- a/regression/cbmc/String4/test.desc
+++ b/regression/cbmc/String4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String5/test.desc b/regression/cbmc/String5/test.desc
index 5821c3e2820..96c9b4bcd7b 100644
--- a/regression/cbmc/String5/test.desc
+++ b/regression/cbmc/String5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String7/test.desc b/regression/cbmc/String7/test.desc
index 5821c3e2820..96c9b4bcd7b 100644
--- a/regression/cbmc/String7/test.desc
+++ b/regression/cbmc/String7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String8/test.desc b/regression/cbmc/String8/test.desc
index 96c9b4bcd7b..032c2879b43 100644
--- a/regression/cbmc/String8/test.desc
+++ b/regression/cbmc/String8/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction1/test.desc b/regression/cbmc/String_Abstraction1/test.desc
index 1eb3c23641f..e6fb3bba609 100644
--- a/regression/cbmc/String_Abstraction1/test.desc
+++ b/regression/cbmc/String_Abstraction1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --string-abstraction --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction11/test.desc b/regression/cbmc/String_Abstraction11/test.desc
index e2565276645..e21815b93e7 100644
--- a/regression/cbmc/String_Abstraction11/test.desc
+++ b/regression/cbmc/String_Abstraction11/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 anon-retval.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction12/test.desc b/regression/cbmc/String_Abstraction12/test.desc
index 13a54271fca..f1bfc215f0e 100644
--- a/regression/cbmc/String_Abstraction12/test.desc
+++ b/regression/cbmc/String_Abstraction12/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 char-array.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction13/test.desc b/regression/cbmc/String_Abstraction13/test.desc
index 487d5ed47fd..286653d5ec1 100644
--- a/regression/cbmc/String_Abstraction13/test.desc
+++ b/regression/cbmc/String_Abstraction13/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 constant.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction14/test.desc b/regression/cbmc/String_Abstraction14/test.desc
index 363bf3474e5..18451e6bc84 100644
--- a/regression/cbmc/String_Abstraction14/test.desc
+++ b/regression/cbmc/String_Abstraction14/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 pass-in-implicit.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction15/test.desc b/regression/cbmc/String_Abstraction15/test.desc
index 05d3fbd6365..d7fa5b8d070 100644
--- a/regression/cbmc/String_Abstraction15/test.desc
+++ b/regression/cbmc/String_Abstraction15/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 pass-in.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction16/test.desc b/regression/cbmc/String_Abstraction16/test.desc
index bfc2287e1ce..5a112202fa5 100644
--- a/regression/cbmc/String_Abstraction16/test.desc
+++ b/regression/cbmc/String_Abstraction16/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 ptr-arith.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction17/test.desc b/regression/cbmc/String_Abstraction17/test.desc
index ad0106474bd..ecc21f02dff 100644
--- a/regression/cbmc/String_Abstraction17/test.desc
+++ b/regression/cbmc/String_Abstraction17/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 strcpy-no-decl.c
 --string-abstraction --validate-goto-model
 ^EXIT=10$
diff --git a/regression/cbmc/String_Abstraction18/test.desc b/regression/cbmc/String_Abstraction18/test.desc
index a59bb4ae0ea..1ba5b8639ea 100644
--- a/regression/cbmc/String_Abstraction18/test.desc
+++ b/regression/cbmc/String_Abstraction18/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 strcpy.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction19/test.desc b/regression/cbmc/String_Abstraction19/test.desc
index f573198d9a1..456949ab85b 100644
--- a/regression/cbmc/String_Abstraction19/test.desc
+++ b/regression/cbmc/String_Abstraction19/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 structs.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction2/test.desc b/regression/cbmc/String_Abstraction2/test.desc
index 1eb3c23641f..e6fb3bba609 100644
--- a/regression/cbmc/String_Abstraction2/test.desc
+++ b/regression/cbmc/String_Abstraction2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --string-abstraction --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction20/test.desc b/regression/cbmc/String_Abstraction20/test.desc
index a847537f994..4d938229673 100644
--- a/regression/cbmc/String_Abstraction20/test.desc
+++ b/regression/cbmc/String_Abstraction20/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 structs2.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction21/test.desc b/regression/cbmc/String_Abstraction21/test.desc
index 9ecab2d3ccb..bd236c738fc 100644
--- a/regression/cbmc/String_Abstraction21/test.desc
+++ b/regression/cbmc/String_Abstraction21/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 strcpy2.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction22/test.desc b/regression/cbmc/String_Abstraction22/test.desc
index ccde4872657..f3145b289ad 100644
--- a/regression/cbmc/String_Abstraction22/test.desc
+++ b/regression/cbmc/String_Abstraction22/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --string-abstraction
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction23/test.desc b/regression/cbmc/String_Abstraction23/test.desc
index 1eb3c23641f..e6fb3bba609 100644
--- a/regression/cbmc/String_Abstraction23/test.desc
+++ b/regression/cbmc/String_Abstraction23/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --string-abstraction --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction24/test.desc b/regression/cbmc/String_Abstraction24/test.desc
index f3e2764ae85..2c2667887f0 100644
--- a/regression/cbmc/String_Abstraction24/test.desc
+++ b/regression/cbmc/String_Abstraction24/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --string-abstraction
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/String_Abstraction3/test.desc b/regression/cbmc/String_Abstraction3/test.desc
index 1eb3c23641f..e6fb3bba609 100644
--- a/regression/cbmc/String_Abstraction3/test.desc
+++ b/regression/cbmc/String_Abstraction3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --string-abstraction --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction4/test.desc b/regression/cbmc/String_Abstraction4/test.desc
index 4beaf5352c1..665513326d2 100644
--- a/regression/cbmc/String_Abstraction4/test.desc
+++ b/regression/cbmc/String_Abstraction4/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --string-abstraction --pointer-check --bounds-check
 ^EXIT=10$
diff --git a/regression/cbmc/String_Abstraction5/test.desc b/regression/cbmc/String_Abstraction5/test.desc
index e6fb3bba609..4d28a11df24 100644
--- a/regression/cbmc/String_Abstraction5/test.desc
+++ b/regression/cbmc/String_Abstraction5/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --string-abstraction --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction7/test.desc b/regression/cbmc/String_Abstraction7/test.desc
index e6fb3bba609..4d28a11df24 100644
--- a/regression/cbmc/String_Abstraction7/test.desc
+++ b/regression/cbmc/String_Abstraction7/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --string-abstraction --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction8/test.desc b/regression/cbmc/String_Abstraction8/test.desc
index 2e71211cd8a..c9b7d9f6ff4 100644
--- a/regression/cbmc/String_Abstraction8/test.desc
+++ b/regression/cbmc/String_Abstraction8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --string-abstraction --unwind 5 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String_Abstraction9/test.desc b/regression/cbmc/String_Abstraction9/test.desc
index 1eb3c23641f..e6fb3bba609 100644
--- a/regression/cbmc/String_Abstraction9/test.desc
+++ b/regression/cbmc/String_Abstraction9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --string-abstraction --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/String_Literal1/test.desc b/regression/cbmc/String_Literal1/test.desc
index 3ff5fed3f75..4eb9bdc9e07 100644
--- a/regression/cbmc/String_Literal1/test.desc
+++ b/regression/cbmc/String_Literal1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --trace
 ^State \d+ file main.c function main line 20 thread 0$
diff --git a/regression/cbmc/Struct_Array1/test.desc b/regression/cbmc/Struct_Array1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Array1/test.desc
+++ b/regression/cbmc/Struct_Array1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Bytewise1/test.desc b/regression/cbmc/Struct_Bytewise1/test.desc
index 4452a33cdc0..03ad7634d7c 100644
--- a/regression/cbmc/Struct_Bytewise1/test.desc
+++ b/regression/cbmc/Struct_Bytewise1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 struct_bytewise.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Bytewise2/test.desc b/regression/cbmc/Struct_Bytewise2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Bytewise2/test.desc
+++ b/regression/cbmc/Struct_Bytewise2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization1/test.desc b/regression/cbmc/Struct_Initialization1/test.desc
index 34817532309..0797c56a2cc 100644
--- a/regression/cbmc/Struct_Initialization1/test.desc
+++ b/regression/cbmc/Struct_Initialization1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization10/test.desc b/regression/cbmc/Struct_Initialization10/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Initialization10/test.desc
+++ b/regression/cbmc/Struct_Initialization10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization2/test.desc b/regression/cbmc/Struct_Initialization2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Initialization2/test.desc
+++ b/regression/cbmc/Struct_Initialization2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization3/test.desc b/regression/cbmc/Struct_Initialization3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Initialization3/test.desc
+++ b/regression/cbmc/Struct_Initialization3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization4/test.desc b/regression/cbmc/Struct_Initialization4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Initialization4/test.desc
+++ b/regression/cbmc/Struct_Initialization4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization5/test.desc b/regression/cbmc/Struct_Initialization5/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Initialization5/test.desc
+++ b/regression/cbmc/Struct_Initialization5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization6/test.desc b/regression/cbmc/Struct_Initialization6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Initialization6/test.desc
+++ b/regression/cbmc/Struct_Initialization6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization7/test.desc b/regression/cbmc/Struct_Initialization7/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Initialization7/test.desc
+++ b/regression/cbmc/Struct_Initialization7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization8/test.desc b/regression/cbmc/Struct_Initialization8/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Initialization8/test.desc
+++ b/regression/cbmc/Struct_Initialization8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Initialization9/test.desc b/regression/cbmc/Struct_Initialization9/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Initialization9/test.desc
+++ b/regression/cbmc/Struct_Initialization9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Padding1/test.desc b/regression/cbmc/Struct_Padding1/test.desc
index 0c98ed635a3..35cc9d3cd74 100644
--- a/regression/cbmc/Struct_Padding1/test.desc
+++ b/regression/cbmc/Struct_Padding1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --32
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Pointer1/test.desc b/regression/cbmc/Struct_Pointer1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Pointer1/test.desc
+++ b/regression/cbmc/Struct_Pointer1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Pointer2/test.desc b/regression/cbmc/Struct_Pointer2/test.desc
index 86726dd3c44..39c491ba8bb 100644
--- a/regression/cbmc/Struct_Pointer2/test.desc
+++ b/regression/cbmc/Struct_Pointer2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Pointer3/test.desc b/regression/cbmc/Struct_Pointer3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Pointer3/test.desc
+++ b/regression/cbmc/Struct_Pointer3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Pointer_Array1/test.desc b/regression/cbmc/Struct_Pointer_Array1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Struct_Pointer_Array1/test.desc
+++ b/regression/cbmc/Struct_Pointer_Array1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Struct_Propagation1/test.desc b/regression/cbmc/Struct_Propagation1/test.desc
index 25707ea2b5c..42e6505e2d3 100644
--- a/regression/cbmc/Struct_Propagation1/test.desc
+++ b/regression/cbmc/Struct_Propagation1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 5
 ^EXIT=0$
diff --git a/regression/cbmc/Type_Error1/test.desc b/regression/cbmc/Type_Error1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Type_Error1/test.desc
+++ b/regression/cbmc/Type_Error1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Typecast1/test.desc b/regression/cbmc/Typecast1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Typecast1/test.desc
+++ b/regression/cbmc/Typecast1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Typecast2/test.desc b/regression/cbmc/Typecast2/test.desc
index e75e707a552..cdbe617e1f6 100644
--- a/regression/cbmc/Typecast2/test.desc
+++ b/regression/cbmc/Typecast2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --no-propagation --64
 ^EXIT=0$
diff --git a/regression/cbmc/Typecast3/test.desc b/regression/cbmc/Typecast3/test.desc
index c6e349c161c..fb0ba091c5b 100644
--- a/regression/cbmc/Typecast3/test.desc
+++ b/regression/cbmc/Typecast3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Unbounded_Array1/test.desc b/regression/cbmc/Unbounded_Array1/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/Unbounded_Array1/test.desc
+++ b/regression/cbmc/Unbounded_Array1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Unbounded_Array2/test.desc b/regression/cbmc/Unbounded_Array2/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/Unbounded_Array2/test.desc
+++ b/regression/cbmc/Unbounded_Array2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Unbounded_Array3/test.desc b/regression/cbmc/Unbounded_Array3/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Unbounded_Array3/test.desc
+++ b/regression/cbmc/Unbounded_Array3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Unbounded_Array4/test.desc b/regression/cbmc/Unbounded_Array4/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/Unbounded_Array4/test.desc
+++ b/regression/cbmc/Unbounded_Array4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Unbounded_Array5/test.desc b/regression/cbmc/Unbounded_Array5/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/Unbounded_Array5/test.desc
+++ b/regression/cbmc/Unbounded_Array5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Unbounded_Array6/test.desc b/regression/cbmc/Unbounded_Array6/test.desc
index 3125bc8e945..b5d481c7c7a 100644
--- a/regression/cbmc/Unbounded_Array6/test.desc
+++ b/regression/cbmc/Unbounded_Array6/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --trace
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/Undefined_Function1/test.desc b/regression/cbmc/Undefined_Function1/test.desc
index 035e5aec631..431b8dc42b1 100644
--- a/regression/cbmc/Undefined_Function1/test.desc
+++ b/regression/cbmc/Undefined_Function1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Undefined_Function2/test.desc b/regression/cbmc/Undefined_Function2/test.desc
index 31ef9c4330d..bf3843459f5 100644
--- a/regression/cbmc/Undefined_Function2/test.desc
+++ b/regression/cbmc/Undefined_Function2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Undefined_Shift1/test.desc b/regression/cbmc/Undefined_Shift1/test.desc
index 2100ae1bf2f..06417908cee 100644
--- a/regression/cbmc/Undefined_Shift1/test.desc
+++ b/regression/cbmc/Undefined_Shift1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --undefined-shift-check
 ^EXIT=10$
diff --git a/regression/cbmc/Union_Initialization1/test.desc b/regression/cbmc/Union_Initialization1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Union_Initialization1/test.desc
+++ b/regression/cbmc/Union_Initialization1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Union_Initialization2/test.desc b/regression/cbmc/Union_Initialization2/test.desc
index fb1dcb59ba7..613e7a62267 100644
--- a/regression/cbmc/Union_Initialization2/test.desc
+++ b/regression/cbmc/Union_Initialization2/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Union_Initialization5/test.desc b/regression/cbmc/Union_Initialization5/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Union_Initialization5/test.desc
+++ b/regression/cbmc/Union_Initialization5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Unwinding_Locality1/test.desc b/regression/cbmc/Unwinding_Locality1/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/Unwinding_Locality1/test.desc
+++ b/regression/cbmc/Unwinding_Locality1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/Variadic1/test.desc b/regression/cbmc/Variadic1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Variadic1/test.desc
+++ b/regression/cbmc/Variadic1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/Visual_Studio_Types1/test.desc b/regression/cbmc/Visual_Studio_Types1/test.desc
index 8a0bf496c8f..982c46d6c98 100644
--- a/regression/cbmc/Visual_Studio_Types1/test.desc
+++ b/regression/cbmc/Visual_Studio_Types1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --i386-win32
 ^EXIT=0$
diff --git a/regression/cbmc/Visual_Studio_Types2/test.desc b/regression/cbmc/Visual_Studio_Types2/test.desc
index 1fa3a10bf4c..254b9942989 100644
--- a/regression/cbmc/Visual_Studio_Types2/test.desc
+++ b/regression/cbmc/Visual_Studio_Types2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --winx64
 ^EXIT=0$
diff --git a/regression/cbmc/Zero_Initialization1/test.desc b/regression/cbmc/Zero_Initialization1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/Zero_Initialization1/test.desc
+++ b/regression/cbmc/Zero_Initialization1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/__builtin_clz-01/big-endian.desc b/regression/cbmc/__builtin_clz-01/big-endian.desc
index 384020bd94f..8fce3084303 100644
--- a/regression/cbmc/__builtin_clz-01/big-endian.desc
+++ b/regression/cbmc/__builtin_clz-01/big-endian.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --bounds-check --big-endian
 ^\[main.bit_count.\d+\] line 61 count leading zeros is undefined for value zero in __builtin_clz\(0u\): FAILURE$
diff --git a/regression/cbmc/__builtin_clz-01/test.desc b/regression/cbmc/__builtin_clz-01/test.desc
index 8da8468eb09..335b9f6beca 100644
--- a/regression/cbmc/__builtin_clz-01/test.desc
+++ b/regression/cbmc/__builtin_clz-01/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --bounds-check
 ^\[main.bit_count.\d+\] line 61 count leading zeros is undefined for value zero in __builtin_clz\(0u\): FAILURE$
diff --git a/regression/cbmc/__builtin_ctz-01/big-endian.desc b/regression/cbmc/__builtin_ctz-01/big-endian.desc
index 32ac57e326c..3251ca19026 100644
--- a/regression/cbmc/__builtin_ctz-01/big-endian.desc
+++ b/regression/cbmc/__builtin_ctz-01/big-endian.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --bounds-check --big-endian
 ^\[main.bit_count.\d+\] line 46 count trailing zeros is undefined for value zero in __builtin_ctz\(0u\): FAILURE$
diff --git a/regression/cbmc/__builtin_ctz-01/test.desc b/regression/cbmc/__builtin_ctz-01/test.desc
index fbbd69442a3..7b8ccbf8e26 100644
--- a/regression/cbmc/__builtin_ctz-01/test.desc
+++ b/regression/cbmc/__builtin_ctz-01/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --bounds-check
 ^\[main.bit_count.\d+\] line 46 count trailing zeros is undefined for value zero in __builtin_ctz\(0u\): FAILURE$
diff --git a/regression/cbmc/__builtin_ffs-01/big-endian.desc b/regression/cbmc/__builtin_ffs-01/big-endian.desc
index 77655302fee..1e0a706ecec 100644
--- a/regression/cbmc/__builtin_ffs-01/big-endian.desc
+++ b/regression/cbmc/__builtin_ffs-01/big-endian.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check --bounds-check --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/__builtin_ffs-01/test.desc b/regression/cbmc/__builtin_ffs-01/test.desc
index 96c9b4bcd7b..032c2879b43 100644
--- a/regression/cbmc/__builtin_ffs-01/test.desc
+++ b/regression/cbmc/__builtin_ffs-01/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/__func__1/test.desc b/regression/cbmc/__func__1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/__func__1/test.desc
+++ b/regression/cbmc/__func__1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/address_of_struct_member/test.desc b/regression/cbmc/address_of_struct_member/test.desc
index d5dc9a41012..d3b7fa7fdda 100644
--- a/regression/cbmc/address_of_struct_member/test.desc
+++ b/regression/cbmc/address_of_struct_member/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 address_of.c
 
 \[main\.assertion\.1\] line \d+ expected failure: ref == 34: FAILURE
diff --git a/regression/cbmc/address_of_struct_member_rec/test.desc b/regression/cbmc/address_of_struct_member_rec/test.desc
index a0ab293013e..7153972f526 100644
--- a/regression/cbmc/address_of_struct_member_rec/test.desc
+++ b/regression/cbmc/address_of_struct_member_rec/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 address_of_rec.c
 
 \[main\.assertion\.1\] line \d+ expected failure: ref == 'b': FAILURE
diff --git a/regression/cbmc/address_space_size_limit1/test.desc b/regression/cbmc/address_space_size_limit1/test.desc
index d68272d8db5..0794e0fe6a1 100644
--- a/regression/cbmc/address_space_size_limit1/test.desc
+++ b/regression/cbmc/address_space_size_limit1/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths
+CORE thorough-paths no-new-smt
 test.c
 --no-simplify --unwind 300 --object-bits 8
 too many addressed objects
diff --git a/regression/cbmc/address_space_size_limit3/test.desc b/regression/cbmc/address_space_size_limit3/test.desc
index 84ba893a1e1..8aaae24a492 100644
--- a/regression/cbmc/address_space_size_limit3/test.desc
+++ b/regression/cbmc/address_space_size_limit3/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-smt-backend
+CORE thorough-smt-backend no-new-smt
 main.i
 --32 --little-endian --object-bits 26 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/always_inline1/test.desc b/regression/cbmc/always_inline1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/always_inline1/test.desc
+++ b/regression/cbmc/always_inline1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/always_inline2/test.desc b/regression/cbmc/always_inline2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/always_inline2/test.desc
+++ b/regression/cbmc/always_inline2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/always_inline3/test.desc b/regression/cbmc/always_inline3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/always_inline3/test.desc
+++ b/regression/cbmc/always_inline3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/apply_condition1/test.desc b/regression/cbmc/apply_condition1/test.desc
index 1af4a06c3bd..c0dd22e954d 100644
--- a/regression/cbmc/apply_condition1/test.desc
+++ b/regression/cbmc/apply_condition1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/argc-and-argv/argc1.desc b/regression/cbmc/argc-and-argv/argc1.desc
index 75a33f47f83..5f6348ffbe0 100644
--- a/regression/cbmc/argc-and-argv/argc1.desc
+++ b/regression/cbmc/argc-and-argv/argc1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 argc1.c
 --bounds-check --pointer-check --unwind 0
 ^EXIT=10$
diff --git a/regression/cbmc/argc-and-argv/argv1.desc b/regression/cbmc/argc-and-argv/argv1.desc
index 978f764059d..1f379687b2b 100644
--- a/regression/cbmc/argc-and-argv/argv1.desc
+++ b/regression/cbmc/argc-and-argv/argv1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 argv1.c
 --bounds-check --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/argv2/test.desc b/regression/cbmc/argv2/test.desc
index 672e7d28024..e41bbe1df7a 100644
--- a/regression/cbmc/argv2/test.desc
+++ b/regression/cbmc/argv2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.i
 --32
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/array-bug-6230/test.desc b/regression/cbmc/array-bug-6230/test.desc
index dc07bc8a3f3..e7f5fdc04e1 100644
--- a/regression/cbmc/array-bug-6230/test.desc
+++ b/regression/cbmc/array-bug-6230/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --malloc-may-fail --malloc-fail-null --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/array-cell-sensitivity1/test.desc b/regression/cbmc/array-cell-sensitivity1/test.desc
index 8660167f711..9b926d93278 100644
--- a/regression/cbmc/array-cell-sensitivity1/test.desc
+++ b/regression/cbmc/array-cell-sensitivity1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::array!0@1#2\[\[1\]\] =
diff --git a/regression/cbmc/array-cell-sensitivity1/test_execution.desc b/regression/cbmc/array-cell-sensitivity1/test_execution.desc
index bae66a2dd4b..9280dcb19be 100644
--- a/regression/cbmc/array-cell-sensitivity1/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity1/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/array-cell-sensitivity10/test.desc b/regression/cbmc/array-cell-sensitivity10/test.desc
index 09a6e142f2c..76d5b27a974 100644
--- a/regression/cbmc/array-cell-sensitivity10/test.desc
+++ b/regression/cbmc/array-cell-sensitivity10/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::array!0@1#2\[\[0\]\]..x =
diff --git a/regression/cbmc/array-cell-sensitivity10/test_execution.desc b/regression/cbmc/array-cell-sensitivity10/test_execution.desc
index 1e8aa561e48..ad3cfb11354 100644
--- a/regression/cbmc/array-cell-sensitivity10/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity10/test_execution.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/array-cell-sensitivity11/test.desc b/regression/cbmc/array-cell-sensitivity11/test.desc
index 39040e6ec57..876777e3cf6 100644
--- a/regression/cbmc/array-cell-sensitivity11/test.desc
+++ b/regression/cbmc/array-cell-sensitivity11/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 main::1::array!0@1#2\[\[0\]\]..y =
diff --git a/regression/cbmc/array-cell-sensitivity11/test_execution.desc b/regression/cbmc/array-cell-sensitivity11/test_execution.desc
index d33e4045438..70141323480 100644
--- a/regression/cbmc/array-cell-sensitivity11/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity11/test_execution.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/array-cell-sensitivity12/test_execution.desc b/regression/cbmc/array-cell-sensitivity12/test_execution.desc
index d33e4045438..70141323480 100644
--- a/regression/cbmc/array-cell-sensitivity12/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity12/test_execution.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/array-cell-sensitivity13/test.desc b/regression/cbmc/array-cell-sensitivity13/test.desc
index f1e573e7548..36d5cc34e1a 100644
--- a/regression/cbmc/array-cell-sensitivity13/test.desc
+++ b/regression/cbmc/array-cell-sensitivity13/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 main::1::node1!0@1#2\.\.data =
diff --git a/regression/cbmc/array-cell-sensitivity13/test_execution.desc b/regression/cbmc/array-cell-sensitivity13/test_execution.desc
index f3dc42bc691..05e951427ff 100644
--- a/regression/cbmc/array-cell-sensitivity13/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity13/test_execution.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/array-cell-sensitivity14/test.desc b/regression/cbmc/array-cell-sensitivity14/test.desc
index 56536513f0d..3395875c67d 100644
--- a/regression/cbmc/array-cell-sensitivity14/test.desc
+++ b/regression/cbmc/array-cell-sensitivity14/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 main::1::node1!0@1#2\.\.data =
diff --git a/regression/cbmc/array-cell-sensitivity14/test_execution.desc b/regression/cbmc/array-cell-sensitivity14/test_execution.desc
index 5b84583d54a..fbb8ee591f9 100644
--- a/regression/cbmc/array-cell-sensitivity14/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity14/test_execution.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/array-cell-sensitivity15/test.desc b/regression/cbmc/array-cell-sensitivity15/test.desc
index ebcd06ece7b..84c4b927b7c 100644
--- a/regression/cbmc/array-cell-sensitivity15/test.desc
+++ b/regression/cbmc/array-cell-sensitivity15/test.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 access.c
 --program-only
 ^EXIT=0$
diff --git a/regression/cbmc/array-cell-sensitivity2/test.desc b/regression/cbmc/array-cell-sensitivity2/test.desc
index 976c607d8b1..f72ae25fcc6 100644
--- a/regression/cbmc/array-cell-sensitivity2/test.desc
+++ b/regression/cbmc/array-cell-sensitivity2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 main::1::array!0@1#2 = with\(main::1::array!0@1#1, (main::argc!0@1#1 \+ -1|cast\(main::argc!0@1#1 \+ -1, signedbv\[64\]\)), 1\)
diff --git a/regression/cbmc/array-cell-sensitivity2/test_execution.desc b/regression/cbmc/array-cell-sensitivity2/test_execution.desc
index bae66a2dd4b..9280dcb19be 100644
--- a/regression/cbmc/array-cell-sensitivity2/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity2/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/array-cell-sensitivity3/test.desc b/regression/cbmc/array-cell-sensitivity3/test.desc
index bc2967a5861..ca15f0a10d0 100644
--- a/regression/cbmc/array-cell-sensitivity3/test.desc
+++ b/regression/cbmc/array-cell-sensitivity3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::array!0@1#2\[\[0\]\] =
diff --git a/regression/cbmc/array-cell-sensitivity3/test_execution.desc b/regression/cbmc/array-cell-sensitivity3/test_execution.desc
index 52bf413ffd9..90923e72fb0 100644
--- a/regression/cbmc/array-cell-sensitivity3/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity3/test_execution.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/array-cell-sensitivity4/test.desc b/regression/cbmc/array-cell-sensitivity4/test.desc
index 1507d095b49..7ebd769707d 100644
--- a/regression/cbmc/array-cell-sensitivity4/test.desc
+++ b/regression/cbmc/array-cell-sensitivity4/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::array!0@1#2\[\[1\]\] =
diff --git a/regression/cbmc/array-cell-sensitivity4/test_execution.desc b/regression/cbmc/array-cell-sensitivity4/test_execution.desc
index bae66a2dd4b..9280dcb19be 100644
--- a/regression/cbmc/array-cell-sensitivity4/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity4/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/array-cell-sensitivity5/test.desc b/regression/cbmc/array-cell-sensitivity5/test.desc
index 0023375c14b..26985ac3983 100644
--- a/regression/cbmc/array-cell-sensitivity5/test.desc
+++ b/regression/cbmc/array-cell-sensitivity5/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 symex_dynamic::dynamic_object#2\[\[1\]\] =
diff --git a/regression/cbmc/array-cell-sensitivity5/test_execution.desc b/regression/cbmc/array-cell-sensitivity5/test_execution.desc
index bae66a2dd4b..9280dcb19be 100644
--- a/regression/cbmc/array-cell-sensitivity5/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity5/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/array-cell-sensitivity6/test.desc b/regression/cbmc/array-cell-sensitivity6/test.desc
index 0784095ce24..fe2602094b1 100644
--- a/regression/cbmc/array-cell-sensitivity6/test.desc
+++ b/regression/cbmc/array-cell-sensitivity6/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 symex_dynamic::dynamic_object#2\[\[1\]\] =
diff --git a/regression/cbmc/array-cell-sensitivity6/test_execution.desc b/regression/cbmc/array-cell-sensitivity6/test_execution.desc
index bae66a2dd4b..9280dcb19be 100644
--- a/regression/cbmc/array-cell-sensitivity6/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity6/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/array-cell-sensitivity7/test.desc b/regression/cbmc/array-cell-sensitivity7/test.desc
index 4ab41c78401..af77262bf77 100644
--- a/regression/cbmc/array-cell-sensitivity7/test.desc
+++ b/regression/cbmc/array-cell-sensitivity7/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::array!0@1#2\[\[1\]\] =
diff --git a/regression/cbmc/array-cell-sensitivity7/test_execution.desc b/regression/cbmc/array-cell-sensitivity7/test_execution.desc
index 4e577438df9..57ae814e535 100644
--- a/regression/cbmc/array-cell-sensitivity7/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity7/test_execution.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/array-cell-sensitivity8/test.desc b/regression/cbmc/array-cell-sensitivity8/test.desc
index cbf8ddcc46d..249ecdc42b1 100644
--- a/regression/cbmc/array-cell-sensitivity8/test.desc
+++ b/regression/cbmc/array-cell-sensitivity8/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::array!0@1#2\[\[1\]\] =
diff --git a/regression/cbmc/array-cell-sensitivity8/test_execution.desc b/regression/cbmc/array-cell-sensitivity8/test_execution.desc
index 6cbd3a308e8..6977d7ae999 100644
--- a/regression/cbmc/array-cell-sensitivity8/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity8/test_execution.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/array-cell-sensitivity9/test.desc b/regression/cbmc/array-cell-sensitivity9/test.desc
index 1af05859124..84fc8b0d9bd 100644
--- a/regression/cbmc/array-cell-sensitivity9/test.desc
+++ b/regression/cbmc/array-cell-sensitivity9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 main::1::array!0@1#2\[\[0\]\]..x =
diff --git a/regression/cbmc/array-cell-sensitivity9/test_execution.desc b/regression/cbmc/array-cell-sensitivity9/test_execution.desc
index bae66a2dd4b..9280dcb19be 100644
--- a/regression/cbmc/array-cell-sensitivity9/test_execution.desc
+++ b/regression/cbmc/array-cell-sensitivity9/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/array-constraint/test.desc b/regression/cbmc/array-constraint/test.desc
index 04dcc2aee65..f450ca322fb 100644
--- a/regression/cbmc/array-constraint/test.desc
+++ b/regression/cbmc/array-constraint/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-array-constraints
 ^EXIT=1$
diff --git a/regression/cbmc/array-constraint/test_xml.desc b/regression/cbmc/array-constraint/test_xml.desc
index 8288e2de3e3..8a5e92b42b1 100644
--- a/regression/cbmc/array-constraint/test_xml.desc
+++ b/regression/cbmc/array-constraint/test_xml.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-array-constraints --xml-ui
 ^EXIT=1$
diff --git a/regression/cbmc/array-function-parameters/test.desc b/regression/cbmc/array-function-parameters/test.desc
index 515a2470dd8..bcc19893964 100644
--- a/regression/cbmc/array-function-parameters/test.desc
+++ b/regression/cbmc/array-function-parameters/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --function test --min-null-tree-depth 2 --max-nondet-tree-depth 2 --bounds-check
 ^EXIT=10$
diff --git a/regression/cbmc/array-tests/test.desc b/regression/cbmc/array-tests/test.desc
index 2d1516825f8..3380b5e9b74 100644
--- a/regression/cbmc/array-tests/test.desc
+++ b/regression/cbmc/array-tests/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths thorough-smt-backend new-smt-backend
+CORE thorough-paths thorough-smt-backend
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/array-tests/uf-always.desc b/regression/cbmc/array-tests/uf-always.desc
index 9cf249b3c8b..c51f158c2f5 100644
--- a/regression/cbmc/array-tests/uf-always.desc
+++ b/regression/cbmc/array-tests/uf-always.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 uf-always.c
 --arrays-uf-always
 ^EXIT=0$
diff --git a/regression/cbmc/array-tests/zero-sized.desc b/regression/cbmc/array-tests/zero-sized.desc
index 2ffc9eeb700..b6c60848e18 100644
--- a/regression/cbmc/array-tests/zero-sized.desc
+++ b/regression/cbmc/array-tests/zero-sized.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 zero-sized.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/array_constraints1/test.desc b/regression/cbmc/array_constraints1/test.desc
index 8040e5651bf..32573032d3b 100644
--- a/regression/cbmc/array_constraints1/test.desc
+++ b/regression/cbmc/array_constraints1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --unwind 2 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/array_of_bool_as_bitvec/test-smt2-outfile.desc b/regression/cbmc/array_of_bool_as_bitvec/test-smt2-outfile.desc
index 16474b90ac5..dc284b10ff9 100644
--- a/regression/cbmc/array_of_bool_as_bitvec/test-smt2-outfile.desc
+++ b/regression/cbmc/array_of_bool_as_bitvec/test-smt2-outfile.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 main.c
 --smt2 --outfile -
 \(= \(select array_of\.0 i\) \(ite false #b1 #b0\)\)
diff --git a/regression/cbmc/assert_func_four/test.desc b/regression/cbmc/assert_func_four/test.desc
index e60cf9c0eac..4e6ca7b2d9e 100644
--- a/regression/cbmc/assert_func_four/test.desc
+++ b/regression/cbmc/assert_func_four/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 function .* is not declared
diff --git a/regression/cbmc/assert_lhs/test.desc b/regression/cbmc/assert_lhs/test.desc
index 92104b36f3e..694fa96c475 100644
--- a/regression/cbmc/assert_lhs/test.desc
+++ b/regression/cbmc/assert_lhs/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 function .* is not declared
diff --git a/regression/cbmc/assert_one/test.desc b/regression/cbmc/assert_one/test.desc
index 7bb309317e2..ccc7c4dd8e7 100644
--- a/regression/cbmc/assert_one/test.desc
+++ b/regression/cbmc/assert_one/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 function .* is not declared
diff --git a/regression/cbmc/assert_rtn_four/test.desc b/regression/cbmc/assert_rtn_four/test.desc
index e60cf9c0eac..4e6ca7b2d9e 100644
--- a/regression/cbmc/assert_rtn_four/test.desc
+++ b/regression/cbmc/assert_rtn_four/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 function .* is not declared
diff --git a/regression/cbmc/assigning_nullpointers_should_not_crash_symex/test.desc b/regression/cbmc/assigning_nullpointers_should_not_crash_symex/test.desc
index a0514f57efb..7871b85de89 100644
--- a/regression/cbmc/assigning_nullpointers_should_not_crash_symex/test.desc
+++ b/regression/cbmc/assigning_nullpointers_should_not_crash_symex/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/atomic_X_fetch-1/pointer.desc b/regression/cbmc/atomic_X_fetch-1/pointer.desc
index 1befe221131..cf2de2e0ffc 100644
--- a/regression/cbmc/atomic_X_fetch-1/pointer.desc
+++ b/regression/cbmc/atomic_X_fetch-1/pointer.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 pointer.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/atomic_X_fetch-1/test.desc b/regression/cbmc/atomic_X_fetch-1/test.desc
index 6032b0b3c6a..27a28993ba5 100644
--- a/regression/cbmc/atomic_X_fetch-1/test.desc
+++ b/regression/cbmc/atomic_X_fetch-1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/atomic_X_fetch-1/two.desc b/regression/cbmc/atomic_X_fetch-1/two.desc
index a3a5eae1881..2470348ff1b 100644
--- a/regression/cbmc/atomic_X_fetch-1/two.desc
+++ b/regression/cbmc/atomic_X_fetch-1/two.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 two.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/atomic_fetch_X-1/pointer.desc b/regression/cbmc/atomic_fetch_X-1/pointer.desc
index 1befe221131..cf2de2e0ffc 100644
--- a/regression/cbmc/atomic_fetch_X-1/pointer.desc
+++ b/regression/cbmc/atomic_fetch_X-1/pointer.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 pointer.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/atomic_fetch_X-1/test.desc b/regression/cbmc/atomic_fetch_X-1/test.desc
index 27a28993ba5..854a0a8ec12 100644
--- a/regression/cbmc/atomic_fetch_X-1/test.desc
+++ b/regression/cbmc/atomic_fetch_X-1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/atomic_fetch_X-1/two.desc b/regression/cbmc/atomic_fetch_X-1/two.desc
index a3a5eae1881..2470348ff1b 100644
--- a/regression/cbmc/atomic_fetch_X-1/two.desc
+++ b/regression/cbmc/atomic_fetch_X-1/two.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 two.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/atomic_load_store-1/test.desc b/regression/cbmc/atomic_load_store-1/test.desc
index 6032b0b3c6a..27a28993ba5 100644
--- a/regression/cbmc/atomic_load_store-1/test.desc
+++ b/regression/cbmc/atomic_load_store-1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/atomic_section_seq1/test.desc b/regression/cbmc/atomic_section_seq1/test.desc
index 6de79559914..69ea4ed48db 100644
--- a/regression/cbmc/atomic_section_seq1/test.desc
+++ b/regression/cbmc/atomic_section_seq1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/aws-byte-buf-regression/test.desc b/regression/cbmc/aws-byte-buf-regression/test.desc
index be64da0049a..87997b956fc 100644
--- a/regression/cbmc/aws-byte-buf-regression/test.desc
+++ b/regression/cbmc/aws-byte-buf-regression/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-check
 VERIFICATION SUCCESSFUL
diff --git a/regression/cbmc/bad_option/test.desc b/regression/cbmc/bad_option/test.desc
index 318af32d2c1..c7f22f5b873 100644
--- a/regression/cbmc/bad_option/test.desc
+++ b/regression/cbmc/bad_option/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 -foo
 ^EXIT=(64|1)$
diff --git a/regression/cbmc/bad_option/test_multiple.desc b/regression/cbmc/bad_option/test_multiple.desc
index 284316a7332..30697b2267d 100644
--- a/regression/cbmc/bad_option/test_multiple.desc
+++ b/regression/cbmc/bad_option/test_multiple.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --trace --foo --refine-strings
 ^EXIT=(64|1)$
diff --git a/regression/cbmc/big-endian-array1/test.desc b/regression/cbmc/big-endian-array1/test.desc
index 9457c6a3fd8..81ceb4c6dc0 100644
--- a/regression/cbmc/big-endian-array1/test.desc
+++ b/regression/cbmc/big-endian-array1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/bounds_check1/test.desc b/regression/cbmc/bounds_check1/test.desc
index 44ec3e491d0..2b746cacc8e 100644
--- a/regression/cbmc/bounds_check1/test.desc
+++ b/regression/cbmc/bounds_check1/test.desc
@@ -1,4 +1,4 @@
-CORE thorough-smt-backend
+CORE thorough-smt-backend no-new-smt
 main.c
 --bounds-check --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/bounds_check2/test.desc b/regression/cbmc/bounds_check2/test.desc
index 32b1f9a2f71..2af7f866590 100644
--- a/regression/cbmc/bounds_check2/test.desc
+++ b/regression/cbmc/bounds_check2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --bounds-check --retain-trivial-checks
 ^Generated \d+ VCC\(s\), 0 remaining after simplification$
diff --git a/regression/cbmc/byte-op-metric/test.desc b/regression/cbmc/byte-op-metric/test.desc
index 1d8a0d7e4ef..cc6c7458784 100644
--- a/regression/cbmc/byte-op-metric/test.desc
+++ b/regression/cbmc/byte-op-metric/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-byte-ops
 ^EXIT=0$
diff --git a/regression/cbmc/byte-op-metric/test_json.desc b/regression/cbmc/byte-op-metric/test_json.desc
index b42edab14c5..987fd55c0cf 100644
--- a/regression/cbmc/byte-op-metric/test_json.desc
+++ b/regression/cbmc/byte-op-metric/test_json.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-byte-ops --json-ui
 activate-multi-line-match
diff --git a/regression/cbmc/byte_extract1/test.desc b/regression/cbmc/byte_extract1/test.desc
index d80821ffede..ecf6bd304bc 100644
--- a/regression/cbmc/byte_extract1/test.desc
+++ b/regression/cbmc/byte_extract1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/byte_extract2/test.desc b/regression/cbmc/byte_extract2/test.desc
index 14708968aae..2bc0ce4c301 100644
--- a/regression/cbmc/byte_extract2/test.desc
+++ b/regression/cbmc/byte_extract2/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/byte_update1/test.desc b/regression/cbmc/byte_update1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/byte_update1/test.desc
+++ b/regression/cbmc/byte_update1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update10/test.desc b/regression/cbmc/byte_update10/test.desc
index db605da9634..e4acf874325 100644
--- a/regression/cbmc/byte_update10/test.desc
+++ b/regression/cbmc/byte_update10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update11/test.desc b/regression/cbmc/byte_update11/test.desc
index 9845e70d84b..366f3e536c7 100644
--- a/regression/cbmc/byte_update11/test.desc
+++ b/regression/cbmc/byte_update11/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update12/test.desc b/regression/cbmc/byte_update12/test.desc
index a5790e40f01..d6cf44082c0 100644
--- a/regression/cbmc/byte_update12/test.desc
+++ b/regression/cbmc/byte_update12/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update13/test.desc b/regression/cbmc/byte_update13/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/byte_update13/test.desc
+++ b/regression/cbmc/byte_update13/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update14/test.desc b/regression/cbmc/byte_update14/test.desc
index 99e319ce543..584a1cbca73 100644
--- a/regression/cbmc/byte_update14/test.desc
+++ b/regression/cbmc/byte_update14/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/byte_update15/test.desc b/regression/cbmc/byte_update15/test.desc
index d1cfc841128..2d2099d7c00 100644
--- a/regression/cbmc/byte_update15/test.desc
+++ b/regression/cbmc/byte_update15/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update16/big-endian.desc b/regression/cbmc/byte_update16/big-endian.desc
index 81ceb4c6dc0..bdf75a8ae10 100644
--- a/regression/cbmc/byte_update16/big-endian.desc
+++ b/regression/cbmc/byte_update16/big-endian.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update16/little-endian.desc b/regression/cbmc/byte_update16/little-endian.desc
index 9845e70d84b..366f3e536c7 100644
--- a/regression/cbmc/byte_update16/little-endian.desc
+++ b/regression/cbmc/byte_update16/little-endian.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update17/test.desc b/regression/cbmc/byte_update17/test.desc
index dabdd0cbe98..1091e209839 100644
--- a/regression/cbmc/byte_update17/test.desc
+++ b/regression/cbmc/byte_update17/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/byte_update18/test.desc b/regression/cbmc/byte_update18/test.desc
index 50bea8a71e6..4ebc3b5a4bb 100644
--- a/regression/cbmc/byte_update18/test.desc
+++ b/regression/cbmc/byte_update18/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/byte_update2/test.desc b/regression/cbmc/byte_update2/test.desc
index b177f2412ca..9845e70d84b 100644
--- a/regression/cbmc/byte_update2/test.desc
+++ b/regression/cbmc/byte_update2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update3/test.desc b/regression/cbmc/byte_update3/test.desc
index b177f2412ca..9845e70d84b 100644
--- a/regression/cbmc/byte_update3/test.desc
+++ b/regression/cbmc/byte_update3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update4/test.desc b/regression/cbmc/byte_update4/test.desc
index b177f2412ca..9845e70d84b 100644
--- a/regression/cbmc/byte_update4/test.desc
+++ b/regression/cbmc/byte_update4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update5/full-slice.desc b/regression/cbmc/byte_update5/full-slice.desc
index ba47d78e7e8..35702fdf3a2 100644
--- a/regression/cbmc/byte_update5/full-slice.desc
+++ b/regression/cbmc/byte_update5/full-slice.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian --full-slice
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update5/test.desc b/regression/cbmc/byte_update5/test.desc
index b177f2412ca..9845e70d84b 100644
--- a/regression/cbmc/byte_update5/test.desc
+++ b/regression/cbmc/byte_update5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update6/test.desc b/regression/cbmc/byte_update6/test.desc
index b177f2412ca..9845e70d84b 100644
--- a/regression/cbmc/byte_update6/test.desc
+++ b/regression/cbmc/byte_update6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update7/test.desc b/regression/cbmc/byte_update7/test.desc
index b177f2412ca..9845e70d84b 100644
--- a/regression/cbmc/byte_update7/test.desc
+++ b/regression/cbmc/byte_update7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update8/test.desc b/regression/cbmc/byte_update8/test.desc
index b177f2412ca..9845e70d84b 100644
--- a/regression/cbmc/byte_update8/test.desc
+++ b/regression/cbmc/byte_update8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/byte_update9/test.desc b/regression/cbmc/byte_update9/test.desc
index 9457c6a3fd8..81ceb4c6dc0 100644
--- a/regression/cbmc/byte_update9/test.desc
+++ b/regression/cbmc/byte_update9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/c99_Bool/test.desc b/regression/cbmc/c99_Bool/test.desc
index a454c448ed0..9afc07ce007 100644
--- a/regression/cbmc/c99_Bool/test.desc
+++ b/regression/cbmc/c99_Bool/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --function foo
 ^EXIT=0$
diff --git a/regression/cbmc/char1/test.desc b/regression/cbmc/char1/test.desc
index 6c1844f833a..ec0541ac9fc 100644
--- a/regression/cbmc/char1/test.desc
+++ b/regression/cbmc/char1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unsigned-char
 ^EXIT=0$
diff --git a/regression/cbmc/character_handling1/test.desc b/regression/cbmc/character_handling1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/character_handling1/test.desc
+++ b/regression/cbmc/character_handling1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/clang_builtins/bitreverse-typeconflict.desc b/regression/cbmc/clang_builtins/bitreverse-typeconflict.desc
index 03599581a2e..7cf28b1c1f2 100644
--- a/regression/cbmc/clang_builtins/bitreverse-typeconflict.desc
+++ b/regression/cbmc/clang_builtins/bitreverse-typeconflict.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 bitreverse-typeconflict.c
 file bitreverse-typeconflict.c line 5 function main: error: __builtin_bitreverse8 expects one operand
 ^EXIT=6$
diff --git a/regression/cbmc/clang_builtins/bitreverse.desc b/regression/cbmc/clang_builtins/bitreverse.desc
index d15a16c069d..00a7688efea 100644
--- a/regression/cbmc/clang_builtins/bitreverse.desc
+++ b/regression/cbmc/clang_builtins/bitreverse.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths
+CORE thorough-paths no-new-smt
 bitreverse.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/clang_builtins/rotate.desc b/regression/cbmc/clang_builtins/rotate.desc
index 25a4d0c702a..286958c723c 100644
--- a/regression/cbmc/clang_builtins/rotate.desc
+++ b/regression/cbmc/clang_builtins/rotate.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 rotate.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/comma1/test.desc b/regression/cbmc/comma1/test.desc
index ad10409bb6f..12fc8ce06e1 100644
--- a/regression/cbmc/comma1/test.desc
+++ b/regression/cbmc/comma1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/compact-trace/test.desc b/regression/cbmc/compact-trace/test.desc
index 60be5f3c51c..4d326a50d10 100644
--- a/regression/cbmc/compact-trace/test.desc
+++ b/regression/cbmc/compact-trace/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --compact-trace
 activate-multi-line-match
diff --git a/regression/cbmc/complex1/test.desc b/regression/cbmc/complex1/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/complex1/test.desc
+++ b/regression/cbmc/complex1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/compound-assignment/compound_promotion.desc b/regression/cbmc/compound-assignment/compound_promotion.desc
index 492043a627a..975a85b1f9d 100644
--- a/regression/cbmc/compound-assignment/compound_promotion.desc
+++ b/regression/cbmc/compound-assignment/compound_promotion.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 compound_promotion.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/compound_literal1/test.desc b/regression/cbmc/compound_literal1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/compound_literal1/test.desc
+++ b/regression/cbmc/compound_literal1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/condition-propagation-1/test.desc b/regression/cbmc/condition-propagation-1/test.desc
index ef37fdd4c7f..cc3baab01eb 100644
--- a/regression/cbmc/condition-propagation-1/test.desc
+++ b/regression/cbmc/condition-propagation-1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/condition-propagation-2/test.desc b/regression/cbmc/condition-propagation-2/test.desc
index ef37fdd4c7f..cc3baab01eb 100644
--- a/regression/cbmc/condition-propagation-2/test.desc
+++ b/regression/cbmc/condition-propagation-2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/condition-propagation-3/test.desc b/regression/cbmc/condition-propagation-3/test.desc
index ef37fdd4c7f..cc3baab01eb 100644
--- a/regression/cbmc/condition-propagation-3/test.desc
+++ b/regression/cbmc/condition-propagation-3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/condition-propagation-4/test.desc b/regression/cbmc/condition-propagation-4/test.desc
index ef37fdd4c7f..cc3baab01eb 100644
--- a/regression/cbmc/condition-propagation-4/test.desc
+++ b/regression/cbmc/condition-propagation-4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/const_ptr1/test.desc b/regression/cbmc/const_ptr1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/const_ptr1/test.desc
+++ b/regression/cbmc/const_ptr1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/constant_folding1/test.desc b/regression/cbmc/constant_folding1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/constant_folding1/test.desc
+++ b/regression/cbmc/constant_folding1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/constant_folding2/test.desc b/regression/cbmc/constant_folding2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/constant_folding2/test.desc
+++ b/regression/cbmc/constant_folding2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/constant_folding3/test.desc b/regression/cbmc/constant_folding3/test.desc
index 30d812ee484..85f89ddbb1a 100644
--- a/regression/cbmc/constant_folding3/test.desc
+++ b/regression/cbmc/constant_folding3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^Generated 1 VCC\(s\), 0 remaining after simplification$
diff --git a/regression/cbmc/constructor1/test.desc b/regression/cbmc/constructor1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/constructor1/test.desc
+++ b/regression/cbmc/constructor1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/constructor2/test.desc b/regression/cbmc/constructor2/test.desc
index da96dcddeee..12e0425c378 100644
--- a/regression/cbmc/constructor2/test.desc
+++ b/regression/cbmc/constructor2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/cover-failed-assertions/test-no-failed-assertions.desc b/regression/cbmc/cover-failed-assertions/test-no-failed-assertions.desc
index 9f7882b842f..0544dcdb715 100644
--- a/regression/cbmc/cover-failed-assertions/test-no-failed-assertions.desc
+++ b/regression/cbmc/cover-failed-assertions/test-no-failed-assertions.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --cover location --pointer-check --malloc-may-fail --malloc-fail-null
 \[main\.coverage\.4\] file test\.c line \d+ function main block 4 \(lines test\.c:main:17,18\): SATISFIED
diff --git a/regression/cbmc/cover-failed-assertions/test.desc b/regression/cbmc/cover-failed-assertions/test.desc
index 99d367e7a1c..2b07b32fe2d 100644
--- a/regression/cbmc/cover-failed-assertions/test.desc
+++ b/regression/cbmc/cover-failed-assertions/test.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --cover location --cover-failed-assertions --pointer-check --malloc-may-fail --malloc-fail-null
 \[main.coverage\.4\] file test\.c line \d+ function main block 4 \(lines test\.c:main:17,18\): SATISFIED
diff --git a/regression/cbmc/coverage_report1/paths.desc b/regression/cbmc/coverage_report1/paths.desc
index 73ae23cf459..6a5b7a085d3 100644
--- a/regression/cbmc/coverage_report1/paths.desc
+++ b/regression/cbmc/coverage_report1/paths.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --symex-coverage-report - --paths lifo
 <line branch="false" hits="1" number="12"/>
diff --git a/regression/cbmc/coverage_report1/test.desc b/regression/cbmc/coverage_report1/test.desc
index fb67a8b3164..81ec99da0b5 100644
--- a/regression/cbmc/coverage_report1/test.desc
+++ b/regression/cbmc/coverage_report1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --symex-coverage-report -
 <line branch="false" hits="1" number="12"/>
diff --git a/regression/cbmc/coverage_report2/test.desc b/regression/cbmc/coverage_report2/test.desc
index 825addd41c6..7100b16008e 100644
--- a/regression/cbmc/coverage_report2/test.desc
+++ b/regression/cbmc/coverage_report2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --symex-coverage-report - --unwind 1
 <line branch="true" condition-coverage="50% \(1/2\)" hits="2" number="3">
diff --git a/regression/cbmc/cprover_assert_two/test.desc b/regression/cbmc/cprover_assert_two/test.desc
index 9f1aa2be3b0..bca33a5dd6d 100644
--- a/regression/cbmc/cprover_assert_two/test.desc
+++ b/regression/cbmc/cprover_assert_two/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/cprover_bool1/test.desc b/regression/cbmc/cprover_bool1/test.desc
index 3771d0ca6f2..20a1bea26ec 100644
--- a/regression/cbmc/cprover_bool1/test.desc
+++ b/regression/cbmc/cprover_bool1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --trace
 ^EXIT=10$
diff --git a/regression/cbmc/cprover_fence_one/test.desc b/regression/cbmc/cprover_fence_one/test.desc
index 9b00e953ecf..123db195ec1 100644
--- a/regression/cbmc/cprover_fence_one/test.desc
+++ b/regression/cbmc/cprover_fence_one/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/cprover_havoc_object_one/test.desc b/regression/cbmc/cprover_havoc_object_one/test.desc
index 9f1aa2be3b0..bca33a5dd6d 100644
--- a/regression/cbmc/cprover_havoc_object_one/test.desc
+++ b/regression/cbmc/cprover_havoc_object_one/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/cprover_id1/test.desc b/regression/cbmc/cprover_id1/test.desc
index 2f27ba321a2..6d0c9efb95c 100644
--- a/regression/cbmc/cprover_id1/test.desc
+++ b/regression/cbmc/cprover_id1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/cprover_postcondition/test.desc b/regression/cbmc/cprover_postcondition/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/cprover_postcondition/test.desc
+++ b/regression/cbmc/cprover_postcondition/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/cprover_precondition/test.desc b/regression/cbmc/cprover_precondition/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/cprover_precondition/test.desc
+++ b/regression/cbmc/cprover_precondition/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/dereference-cache-flag/test-no-cache.desc b/regression/cbmc/dereference-cache-flag/test-no-cache.desc
index 233947512d9..23ee595f1e5 100644
--- a/regression/cbmc/dereference-cache-flag/test-no-cache.desc
+++ b/regression/cbmc/dereference-cache-flag/test-no-cache.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 \(main::1::p!0@1#2 = address_of
diff --git a/regression/cbmc/dereference-cache-flag/test-with-cache.desc b/regression/cbmc/dereference-cache-flag/test-with-cache.desc
index 68a04bdfe0c..b4342f18c76 100644
--- a/regression/cbmc/dereference-cache-flag/test-with-cache.desc
+++ b/regression/cbmc/dereference-cache-flag/test-with-cache.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc --symex-cache-dereferences
 symex::dereference_cache!0#1 = 0
diff --git a/regression/cbmc/destructor1/test.desc b/regression/cbmc/destructor1/test.desc
index 0c9df6413f5..d386a6e31ac 100644
--- a/regression/cbmc/destructor1/test.desc
+++ b/regression/cbmc/destructor1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^\[assert_false.assertion.1\] line 10 assertion 0: FAILURE$
diff --git a/regression/cbmc/destructors/compound_literal.desc b/regression/cbmc/destructors/compound_literal.desc
index 0b34672576b..47c217fed18 100644
--- a/regression/cbmc/destructors/compound_literal.desc
+++ b/regression/cbmc/destructors/compound_literal.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 10 --show-goto-functions
 activate-multi-line-match
diff --git a/regression/cbmc/destructors/enter_lexical_block.desc b/regression/cbmc/destructors/enter_lexical_block.desc
index b088d95998f..751e929d85d 100644
--- a/regression/cbmc/destructors/enter_lexical_block.desc
+++ b/regression/cbmc/destructors/enter_lexical_block.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 10 --show-goto-functions
 activate-multi-line-match
diff --git a/regression/cbmc/divide-by-one-simplify/test.desc b/regression/cbmc/divide-by-one-simplify/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/divide-by-one-simplify/test.desc
+++ b/regression/cbmc/divide-by-one-simplify/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/double_deref/double_deref.desc b/regression/cbmc/double_deref/double_deref.desc
index 93b5aaf0e7a..b5daf7673f3 100644
--- a/regression/cbmc/double_deref/double_deref.desc
+++ b/regression/cbmc/double_deref/double_deref.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 double_deref.c
 --show-vcc
 \{1\} \(main::1::pptr!0@1#2 = address_of\(main::1::ptr[12]!0@1\) \? main::argc!0@1#1 = [12] : main::argc!0@1#1 = [12]\)
diff --git a/regression/cbmc/double_deref/double_deref_single_alias.desc b/regression/cbmc/double_deref/double_deref_single_alias.desc
index 992763a2680..c759890f632 100644
--- a/regression/cbmc/double_deref/double_deref_single_alias.desc
+++ b/regression/cbmc/double_deref/double_deref_single_alias.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 double_deref_single_alias.c
 --show-vcc
 \{1\} main::argc!0@1#1 = 1
diff --git a/regression/cbmc/double_deref/double_deref_with_cast.desc b/regression/cbmc/double_deref/double_deref_with_cast.desc
index e3e9d6f08a4..e5b1f592416 100644
--- a/regression/cbmc/double_deref/double_deref_with_cast.desc
+++ b/regression/cbmc/double_deref/double_deref_with_cast.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 double_deref_with_cast.c
 --show-vcc
 \{1\} \(cast\(main::1::pptr!0@1#2, signedbv\[32\]\*\*\) = address_of\(main::1::ptr2!0@1\) \? main::argc!0@1#1 = 2 \: main::argc!0@1#1 = 1\)
diff --git a/regression/cbmc/double_deref/double_deref_with_cast_single_alias.desc b/regression/cbmc/double_deref/double_deref_with_cast_single_alias.desc
index 9a7f78cb573..6be9a4d83da 100644
--- a/regression/cbmc/double_deref/double_deref_with_cast_single_alias.desc
+++ b/regression/cbmc/double_deref/double_deref_with_cast_single_alias.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 double_deref_with_cast_single_alias.c
 --show-vcc
 \{1\} main::argc!0@1#1 = 1
diff --git a/regression/cbmc/double_deref/double_deref_with_member.desc b/regression/cbmc/double_deref/double_deref_with_member.desc
index c861dbddfb2..85156557ba2 100644
--- a/regression/cbmc/double_deref/double_deref_with_member.desc
+++ b/regression/cbmc/double_deref/double_deref_with_member.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 double_deref_with_member.c
 --show-vcc
 ^\{1\} \(main::1::cptr!0@1#2 = address_of\(main::1::container2!0@1\) \? main::argc!0@1#1 = 2 : main::argc!0@1#1 = 1\)
diff --git a/regression/cbmc/double_deref/double_deref_with_member_single_alias.desc b/regression/cbmc/double_deref/double_deref_with_member_single_alias.desc
index dfd2f251fec..0e4313b1877 100644
--- a/regression/cbmc/double_deref/double_deref_with_member_single_alias.desc
+++ b/regression/cbmc/double_deref/double_deref_with_member_single_alias.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 double_deref_with_member_single_alias.c
 --show-vcc
 \{1\} main::argc!0@1#1 = 1
diff --git a/regression/cbmc/double_deref/double_deref_with_pointer_arithmetic.desc b/regression/cbmc/double_deref/double_deref_with_pointer_arithmetic.desc
index c0d895cda47..3aa1e3f7721 100644
--- a/regression/cbmc/double_deref/double_deref_with_pointer_arithmetic.desc
+++ b/regression/cbmc/double_deref/double_deref_with_pointer_arithmetic.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 double_deref_with_pointer_arithmetic.c
 --show-vcc
 ^\{-[0-9]+\} derefd_pointer::derefd_pointer!0#1 = \{ symex_dynamic::dynamic_object#3\[\[0\]\], symex_dynamic::dynamic_object#3\[\[1\]\] \}\[(mod\(main::argc!0@1#1, 2\)|cast\(mod\(main::argc!0@1#1, 2\), signedbv\[64\]\))\]
diff --git a/regression/cbmc/double_deref/double_deref_with_pointer_arithmetic_single_alias.desc b/regression/cbmc/double_deref/double_deref_with_pointer_arithmetic_single_alias.desc
index 872ed7bd073..73ed1993e1f 100644
--- a/regression/cbmc/double_deref/double_deref_with_pointer_arithmetic_single_alias.desc
+++ b/regression/cbmc/double_deref/double_deref_with_pointer_arithmetic_single_alias.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 double_deref_with_pointer_arithmetic_single_alias.c
 --show-vcc
 \{1\} \(derefd_pointer::derefd_pointer!0#1 = address_of\(symex_dynamic::dynamic_object\$0\) \? main::argc!0@1#1 = 1 : symex::invalid_object!0#0 = main::argc!0@1#1\)
diff --git a/regression/cbmc/dynamic_size1/stack_object.desc b/regression/cbmc/dynamic_size1/stack_object.desc
index 242e2c1d4c0..c6ac74c15fb 100644
--- a/regression/cbmc/dynamic_size1/stack_object.desc
+++ b/regression/cbmc/dynamic_size1/stack_object.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 stack_object.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/dynamic_size1/test.desc b/regression/cbmc/dynamic_size1/test.desc
index c7bf1bb822d..d110065a9cf 100644
--- a/regression/cbmc/dynamic_size1/test.desc
+++ b/regression/cbmc/dynamic_size1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/dynamic_sizeof1/test.desc b/regression/cbmc/dynamic_sizeof1/test.desc
index 23a6930cf4e..832578a5964 100644
--- a/regression/cbmc/dynamic_sizeof1/test.desc
+++ b/regression/cbmc/dynamic_sizeof1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend new-smt-backend
+CORE broken-z3-smt-backend
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/empty_compound_type1/test.desc b/regression/cbmc/empty_compound_type1/test.desc
index 24f428aede5..88df5a048c4 100644
--- a/regression/cbmc/empty_compound_type1/test.desc
+++ b/regression/cbmc/empty_compound_type1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/empty_compound_type2/test.desc b/regression/cbmc/empty_compound_type2/test.desc
index 476325edc54..43b571fbd05 100644
--- a/regression/cbmc/empty_compound_type2/test.desc
+++ b/regression/cbmc/empty_compound_type2/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/empty_compound_type3/test.desc b/regression/cbmc/empty_compound_type3/test.desc
index a9525f8bb0b..71835eef7cb 100644
--- a/regression/cbmc/empty_compound_type3/test.desc
+++ b/regression/cbmc/empty_compound_type3/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/empty_compound_type4/test.desc b/regression/cbmc/empty_compound_type4/test.desc
index 3b114585ec7..fc5073f7368 100644
--- a/regression/cbmc/empty_compound_type4/test.desc
+++ b/regression/cbmc/empty_compound_type4/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 --trace
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/enum-trace1/test_json.desc b/regression/cbmc/enum-trace1/test_json.desc
index f52d8159f89..6619fc73eea 100644
--- a/regression/cbmc/enum-trace1/test_json.desc
+++ b/regression/cbmc/enum-trace1/test_json.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --json-ui --function test --trace
 activate-multi-line-match
diff --git a/regression/cbmc/enum-trace1/test_xml.desc b/regression/cbmc/enum-trace1/test_xml.desc
index 63e8695a41a..b0c3bf820f9 100644
--- a/regression/cbmc/enum-trace1/test_xml.desc
+++ b/regression/cbmc/enum-trace1/test_xml.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --xml-ui --function test --trace
 activate-multi-line-match
diff --git a/regression/cbmc/enum1/test.desc b/regression/cbmc/enum1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/enum1/test.desc
+++ b/regression/cbmc/enum1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum2/test.desc b/regression/cbmc/enum2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/enum2/test.desc
+++ b/regression/cbmc/enum2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum3/test.desc b/regression/cbmc/enum3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/enum3/test.desc
+++ b/regression/cbmc/enum3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum4/test.desc b/regression/cbmc/enum4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/enum4/test.desc
+++ b/regression/cbmc/enum4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum5/test.desc b/regression/cbmc/enum5/test.desc
index 3e3538f4992..a4fe5b3f962 100644
--- a/regression/cbmc/enum5/test.desc
+++ b/regression/cbmc/enum5/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/enum6/test.desc b/regression/cbmc/enum6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/enum6/test.desc
+++ b/regression/cbmc/enum6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum7/test.desc b/regression/cbmc/enum7/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/enum7/test.desc
+++ b/regression/cbmc/enum7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum8/test.desc b/regression/cbmc/enum8/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/enum8/test.desc
+++ b/regression/cbmc/enum8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum9/test.desc b/regression/cbmc/enum9/test.desc
index 245d2eacb1b..8c243e7454c 100644
--- a/regression/cbmc/enum9/test.desc
+++ b/regression/cbmc/enum9/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/enum_is_in_range/enum_test3-simplified.desc b/regression/cbmc/enum_is_in_range/enum_test3-simplified.desc
index 7b61cb34c49..12fd13ace0e 100644
--- a/regression/cbmc/enum_is_in_range/enum_test3-simplified.desc
+++ b/regression/cbmc/enum_is_in_range/enum_test3-simplified.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 enum_test3.c
 --show-goto-functions
 0 ≤ cast\(main::1::ev1, (un)?signedbv\[\d+\]\) ∧ cast\(main::1::ev1, (un)?signedbv\[\d+\]\) ≤ 4
diff --git a/regression/cbmc/enum_is_in_range/enum_test3.desc b/regression/cbmc/enum_is_in_range/enum_test3.desc
index 3acc973c35e..f5a94e90126 100644
--- a/regression/cbmc/enum_is_in_range/enum_test3.desc
+++ b/regression/cbmc/enum_is_in_range/enum_test3.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 enum_test3.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum_is_in_range/enum_test4.desc b/regression/cbmc/enum_is_in_range/enum_test4.desc
index ed0ae318665..cb92ba52f99 100644
--- a/regression/cbmc/enum_is_in_range/enum_test4.desc
+++ b/regression/cbmc/enum_is_in_range/enum_test4.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 enum_test4.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/enum_is_in_range/enum_test5.desc b/regression/cbmc/enum_is_in_range/enum_test5.desc
index d94a28a2f5f..5b89b663b07 100644
--- a/regression/cbmc/enum_is_in_range/enum_test5.desc
+++ b/regression/cbmc/enum_is_in_range/enum_test5.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 enum_test5.c
 --enum-range-check
 ^EXIT=10$
diff --git a/regression/cbmc/enum_is_in_range/enum_test7.desc b/regression/cbmc/enum_is_in_range/enum_test7.desc
index abd2b22e843..613a2cbc8f9 100644
--- a/regression/cbmc/enum_is_in_range/enum_test7.desc
+++ b/regression/cbmc/enum_is_in_range/enum_test7.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 enum_test7.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum_is_in_range/enum_test8.desc b/regression/cbmc/enum_is_in_range/enum_test8.desc
index 732325746ef..b03055b46ea 100644
--- a/regression/cbmc/enum_is_in_range/enum_test8.desc
+++ b/regression/cbmc/enum_is_in_range/enum_test8.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 enum_test8.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/enum_is_in_range/format.desc b/regression/cbmc/enum_is_in_range/format.desc
index 8efd942f74a..6de3db06fa6 100644
--- a/regression/cbmc/enum_is_in_range/format.desc
+++ b/regression/cbmc/enum_is_in_range/format.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 no_duplicate.c
 --show-goto-functions
 main::1::e = 1 ∨ main::1::e = 2 ∨ main::1::e = 4 ∨ main::1::e = 8
diff --git a/regression/cbmc/enum_is_in_range/no_duplicate.desc b/regression/cbmc/enum_is_in_range/no_duplicate.desc
index f9ba922ed11..20c2ce2693b 100644
--- a/regression/cbmc/enum_is_in_range/no_duplicate.desc
+++ b/regression/cbmc/enum_is_in_range/no_duplicate.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 no_duplicate.c
 --enum-range-check
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/enum_underlying_type_01/test.desc b/regression/cbmc/enum_underlying_type_01/test.desc
index cf442150f67..b9a3d7c2794 100644
--- a/regression/cbmc/enum_underlying_type_01/test.desc
+++ b/regression/cbmc/enum_underlying_type_01/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/enum_underlying_type_02/test.desc b/regression/cbmc/enum_underlying_type_02/test.desc
index 0efecca0335..1bb30ef4b5d 100644
--- a/regression/cbmc/enum_underlying_type_02/test.desc
+++ b/regression/cbmc/enum_underlying_type_02/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/enum_underlying_type_03/test.desc b/regression/cbmc/enum_underlying_type_03/test.desc
index 77751f8aefc..41f9982a334 100644
--- a/regression/cbmc/enum_underlying_type_03/test.desc
+++ b/regression/cbmc/enum_underlying_type_03/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/equality_through_array1/test.desc b/regression/cbmc/equality_through_array1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array1/test.desc
+++ b/regression/cbmc/equality_through_array1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_array2/test.desc b/regression/cbmc/equality_through_array2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array2/test.desc
+++ b/regression/cbmc/equality_through_array2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_array3/test.desc b/regression/cbmc/equality_through_array3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array3/test.desc
+++ b/regression/cbmc/equality_through_array3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_array4/test.desc b/regression/cbmc/equality_through_array4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array4/test.desc
+++ b/regression/cbmc/equality_through_array4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_array5/test.desc b/regression/cbmc/equality_through_array5/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array5/test.desc
+++ b/regression/cbmc/equality_through_array5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_array6/test.desc b/regression/cbmc/equality_through_array6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array6/test.desc
+++ b/regression/cbmc/equality_through_array6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_array_of_struct1/test.desc b/regression/cbmc/equality_through_array_of_struct1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array_of_struct1/test.desc
+++ b/regression/cbmc/equality_through_array_of_struct1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_array_of_struct2/test.desc b/regression/cbmc/equality_through_array_of_struct2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array_of_struct2/test.desc
+++ b/regression/cbmc/equality_through_array_of_struct2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_array_of_struct3/test.desc b/regression/cbmc/equality_through_array_of_struct3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array_of_struct3/test.desc
+++ b/regression/cbmc/equality_through_array_of_struct3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_array_of_struct4/test.desc b/regression/cbmc/equality_through_array_of_struct4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/equality_through_array_of_struct4/test.desc
+++ b/regression/cbmc/equality_through_array_of_struct4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_struct1/test.desc b/regression/cbmc/equality_through_struct1/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/equality_through_struct1/test.desc
+++ b/regression/cbmc/equality_through_struct1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_struct2/test.desc b/regression/cbmc/equality_through_struct2/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/equality_through_struct2/test.desc
+++ b/regression/cbmc/equality_through_struct2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_struct3/test.desc b/regression/cbmc/equality_through_struct3/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/equality_through_struct3/test.desc
+++ b/regression/cbmc/equality_through_struct3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_struct4/test.desc b/regression/cbmc/equality_through_struct4/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/equality_through_struct4/test.desc
+++ b/regression/cbmc/equality_through_struct4/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_struct_containing_arrays1/test.desc b/regression/cbmc/equality_through_struct_containing_arrays1/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/equality_through_struct_containing_arrays1/test.desc
+++ b/regression/cbmc/equality_through_struct_containing_arrays1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_struct_containing_arrays2/test.desc b/regression/cbmc/equality_through_struct_containing_arrays2/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/equality_through_struct_containing_arrays2/test.desc
+++ b/regression/cbmc/equality_through_struct_containing_arrays2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_union1/test.desc b/regression/cbmc/equality_through_union1/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/equality_through_union1/test.desc
+++ b/regression/cbmc/equality_through_union1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_union2/test.desc b/regression/cbmc/equality_through_union2/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/equality_through_union2/test.desc
+++ b/regression/cbmc/equality_through_union2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/equality_through_union3/test.desc b/regression/cbmc/equality_through_union3/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/equality_through_union3/test.desc
+++ b/regression/cbmc/equality_through_union3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/exit1/test.desc b/regression/cbmc/exit1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/exit1/test.desc
+++ b/regression/cbmc/exit1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/export-symex-ready-goto/test-bad-usage.desc b/regression/cbmc/export-symex-ready-goto/test-bad-usage.desc
index 7d49270fbe2..134d2bc1ecb 100644
--- a/regression/cbmc/export-symex-ready-goto/test-bad-usage.desc
+++ b/regression/cbmc/export-symex-ready-goto/test-bad-usage.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --export-symex-ready-goto ''
 ^ERROR: Please provide a filename to write the goto-binary to.$
diff --git a/regression/cbmc/export-symex-ready-goto/test-correct.desc b/regression/cbmc/export-symex-ready-goto/test-correct.desc
index e6b592328c7..d035e47d599 100644
--- a/regression/cbmc/export-symex-ready-goto/test-correct.desc
+++ b/regression/cbmc/export-symex-ready-goto/test-correct.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --export-symex-ready-goto exported.symex.ready.goto
 ^Parsing test.c$
diff --git a/regression/cbmc/extern1/test.desc b/regression/cbmc/extern1/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/extern1/test.desc
+++ b/regression/cbmc/extern1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/extern2/test.desc b/regression/cbmc/extern2/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/extern2/test.desc
+++ b/regression/cbmc/extern2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/extern3/test.desc b/regression/cbmc/extern3/test.desc
index 8ec8f46374e..578c27b1fa2 100644
--- a/regression/cbmc/extern3/test.desc
+++ b/regression/cbmc/extern3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/extern4/test.desc b/regression/cbmc/extern4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/extern4/test.desc
+++ b/regression/cbmc/extern4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/extern5/test.desc b/regression/cbmc/extern5/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/extern5/test.desc
+++ b/regression/cbmc/extern5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/extern_initialization1/test.desc b/regression/cbmc/extern_initialization1/test.desc
index 934fbe2fe2d..73b0a6abe16 100644
--- a/regression/cbmc/extern_initialization1/test.desc
+++ b/regression/cbmc/extern_initialization1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 file1.c
 file2.c
 ^EXIT=10$
diff --git a/regression/cbmc/extern_initialization2/test.desc b/regression/cbmc/extern_initialization2/test.desc
index 6a8056da7e4..8a09111c3b1 100644
--- a/regression/cbmc/extern_initialization2/test.desc
+++ b/regression/cbmc/extern_initialization2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 file1.c
 file2.c
 ^EXIT=0$
diff --git a/regression/cbmc/fault_localization-stop_on_fail1/test.desc b/regression/cbmc/fault_localization-stop_on_fail1/test.desc
index 4ac351f51ea..9358227a214 100644
--- a/regression/cbmc/fault_localization-stop_on_fail1/test.desc
+++ b/regression/cbmc/fault_localization-stop_on_fail1/test.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure broken-smt-backend
+CORE paths-lifo-expected-failure broken-smt-backend no-new-smt
 main.c
 --localize-faults --stop-on-fail
 ^EXIT=10$
diff --git a/regression/cbmc/field-sensitivity-trace-wrong-counterexample-1/test.desc b/regression/cbmc/field-sensitivity-trace-wrong-counterexample-1/test.desc
index 302c296e59c..6b29656fb20 100644
--- a/regression/cbmc/field-sensitivity-trace-wrong-counterexample-1/test.desc
+++ b/regression/cbmc/field-sensitivity-trace-wrong-counterexample-1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --trace
 ^EXIT=10$
diff --git a/regression/cbmc/field-sensitivity1/test.desc b/regression/cbmc/field-sensitivity1/test.desc
index b341617e533..523f48ddcfd 100644
--- a/regression/cbmc/field-sensitivity1/test.desc
+++ b/regression/cbmc/field-sensitivity1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::a!0@1#2\.\.x = main::argc!0@1#1
diff --git a/regression/cbmc/field-sensitivity10/test.desc b/regression/cbmc/field-sensitivity10/test.desc
index 0ac74f6391c..b1d83b1c4c2 100644
--- a/regression/cbmc/field-sensitivity10/test.desc
+++ b/regression/cbmc/field-sensitivity10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 main::1::a1!0@1#2\.\.y =
diff --git a/regression/cbmc/field-sensitivity11/test.desc b/regression/cbmc/field-sensitivity11/test.desc
index b92bd687845..9d9d2d4ecfd 100644
--- a/regression/cbmc/field-sensitivity11/test.desc
+++ b/regression/cbmc/field-sensitivity11/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::a1!0@1#2\.\.x = main::argc!0@1#1
diff --git a/regression/cbmc/field-sensitivity12/test.desc b/regression/cbmc/field-sensitivity12/test.desc
index 077f112784c..5a9e2e43bb0 100644
--- a/regression/cbmc/field-sensitivity12/test.desc
+++ b/regression/cbmc/field-sensitivity12/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::a1!0@1#2\.\.x = main::argc!0@1#1
diff --git a/regression/cbmc/field-sensitivity13/test.desc b/regression/cbmc/field-sensitivity13/test.desc
index 6b069745129..0cdbc5b1663 100644
--- a/regression/cbmc/field-sensitivity13/test.desc
+++ b/regression/cbmc/field-sensitivity13/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::b1!0@1#2\.\.a\.\.x = main::argc!0@1#1
diff --git a/regression/cbmc/field-sensitivity14/test.desc b/regression/cbmc/field-sensitivity14/test.desc
index fbc7cec277d..d1748c78147 100644
--- a/regression/cbmc/field-sensitivity14/test.desc
+++ b/regression/cbmc/field-sensitivity14/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^Generated \d+ VCC\(s\), 0 remaining after simplification$
diff --git a/regression/cbmc/field-sensitivity15/test.desc b/regression/cbmc/field-sensitivity15/test.desc
index bba818d84cd..70bb49f6d15 100644
--- a/regression/cbmc/field-sensitivity15/test.desc
+++ b/regression/cbmc/field-sensitivity15/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/field-sensitivity16/test.desc b/regression/cbmc/field-sensitivity16/test.desc
index bba818d84cd..70bb49f6d15 100644
--- a/regression/cbmc/field-sensitivity16/test.desc
+++ b/regression/cbmc/field-sensitivity16/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/field-sensitivity2/test.desc b/regression/cbmc/field-sensitivity2/test.desc
index 622076d0a44..3416366884c 100644
--- a/regression/cbmc/field-sensitivity2/test.desc
+++ b/regression/cbmc/field-sensitivity2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::a1!0@1#2\.\.x =
diff --git a/regression/cbmc/field-sensitivity3/test.desc b/regression/cbmc/field-sensitivity3/test.desc
index ef0725b67eb..bedaf22a831 100644
--- a/regression/cbmc/field-sensitivity3/test.desc
+++ b/regression/cbmc/field-sensitivity3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::a1!0@1#2\.\.x =
diff --git a/regression/cbmc/field-sensitivity5/test.desc b/regression/cbmc/field-sensitivity5/test.desc
index 161c5b5d6fb..cbbc6b7a7c9 100644
--- a/regression/cbmc/field-sensitivity5/test.desc
+++ b/regression/cbmc/field-sensitivity5/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::node1!0@1#2\.\.head =
diff --git a/regression/cbmc/field-sensitivity6/test.desc b/regression/cbmc/field-sensitivity6/test.desc
index 6a5e6b588e2..a976d428bb5 100644
--- a/regression/cbmc/field-sensitivity6/test.desc
+++ b/regression/cbmc/field-sensitivity6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 main::1::b1!0@1#2\.\.a\.\.x =
diff --git a/regression/cbmc/field-sensitivity7/test.desc b/regression/cbmc/field-sensitivity7/test.desc
index b473d8d934a..7b97c8c7d95 100644
--- a/regression/cbmc/field-sensitivity7/test.desc
+++ b/regression/cbmc/field-sensitivity7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 main::1::a1!0@1#2\.\.y =
diff --git a/regression/cbmc/field-sensitivity8/test.desc b/regression/cbmc/field-sensitivity8/test.desc
index 4219fec651e..0d0db3d2bff 100644
--- a/regression/cbmc/field-sensitivity8/test.desc
+++ b/regression/cbmc/field-sensitivity8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --show-vcc
 main::1::a1!0@1#2\.\.y =
diff --git a/regression/cbmc/field-sensitivity9/test.desc b/regression/cbmc/field-sensitivity9/test.desc
index 656fa006bb5..bb5312cb6c7 100644
--- a/regression/cbmc/field-sensitivity9/test.desc
+++ b/regression/cbmc/field-sensitivity9/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --show-vcc
 main::1::a1!0@1#2 =
diff --git a/regression/cbmc/float-nan-check/test.desc b/regression/cbmc/float-nan-check/test.desc
index e98ccd41cc0..92033bd0a16 100644
--- a/regression/cbmc/float-nan-check/test.desc
+++ b/regression/cbmc/float-nan-check/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --nan-check
 \[main.NaN.1\] line \d+ NaN on \+ in byte_extract_(big|little)_endian\(c, (0|0l|0ll), float\) \+ myzero: SUCCESS
diff --git a/regression/cbmc/fmod1/test.desc b/regression/cbmc/fmod1/test.desc
index 8ebdc8c83ba..75ed3d2f77b 100644
--- a/regression/cbmc/fmod1/test.desc
+++ b/regression/cbmc/fmod1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend broken-smt-backend
+CORE broken-z3-smt-backend broken-smt-backend no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/for-break1/test.desc b/regression/cbmc/for-break1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/for-break1/test.desc
+++ b/regression/cbmc/for-break1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/for1/test.desc b/regression/cbmc/for1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/for1/test.desc
+++ b/regression/cbmc/for1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/for2/test.desc b/regression/cbmc/for2/test.desc
index 4b25d69c9ce..ae05c84a478 100644
--- a/regression/cbmc/for2/test.desc
+++ b/regression/cbmc/for2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/for3/test.desc b/regression/cbmc/for3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/for3/test.desc
+++ b/regression/cbmc/for3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/full_slice1/test.desc b/regression/cbmc/full_slice1/test.desc
index 3c7e7ab851a..f980949f3a1 100644
--- a/regression/cbmc/full_slice1/test.desc
+++ b/regression/cbmc/full_slice1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --full-slice --property main.assertion.1 --unwind 1
 ^EXIT=10$
diff --git a/regression/cbmc/full_slice2/test.desc b/regression/cbmc/full_slice2/test.desc
index 38a99c103cf..5f56c5881eb 100644
--- a/regression/cbmc/full_slice2/test.desc
+++ b/regression/cbmc/full_slice2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --full-slice --property main.assertion.2 --unwind 1
 ^EXIT=10$
diff --git a/regression/cbmc/full_slice3/test.desc b/regression/cbmc/full_slice3/test.desc
index b3eaff9c7a1..9f1003d166a 100644
--- a/regression/cbmc/full_slice3/test.desc
+++ b/regression/cbmc/full_slice3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --full-slice
 ^EXIT=0$
diff --git a/regression/cbmc/function-return-no-body1/test.desc b/regression/cbmc/function-return-no-body1/test.desc
index e500f2698e5..17f1370937f 100644
--- a/regression/cbmc/function-return-no-body1/test.desc
+++ b/regression/cbmc/function-return-no-body1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --xml-ui
 activate-multi-line-match
diff --git a/regression/cbmc/function_option1/test.desc b/regression/cbmc/function_option1/test.desc
index 0aa58545b2f..521d7365c2f 100644
--- a/regression/cbmc/function_option1/test.desc
+++ b/regression/cbmc/function_option1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --function f
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_attribute_alias1/test.desc b/regression/cbmc/gcc_attribute_alias1/test.desc
index 00550a6e62f..466da18b2b5 100644
--- a/regression/cbmc/gcc_attribute_alias1/test.desc
+++ b/regression/cbmc/gcc_attribute_alias1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_bswap1/test.desc b/regression/cbmc/gcc_bswap1/test.desc
index 2f839efe54a..b38684cc270 100644
--- a/regression/cbmc/gcc_bswap1/test.desc
+++ b/regression/cbmc/gcc_bswap1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/gcc_builtin_add_overflow/test.desc b/regression/cbmc/gcc_builtin_add_overflow/test.desc
index e970e53d165..a58bf12b1fb 100644
--- a/regression/cbmc/gcc_builtin_add_overflow/test.desc
+++ b/regression/cbmc/gcc_builtin_add_overflow/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 \[check_int.assertion.1\] line \d+ assertion !__builtin_sadd_overflow\(one, one, &result\): SUCCESS
diff --git a/regression/cbmc/gcc_builtin_add_overflow/type-conflict-2.desc b/regression/cbmc/gcc_builtin_add_overflow/type-conflict-2.desc
index 4db9cb24eb1..d936698a5ca 100644
--- a/regression/cbmc/gcc_builtin_add_overflow/type-conflict-2.desc
+++ b/regression/cbmc/gcc_builtin_add_overflow/type-conflict-2.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 type-conflict.c
 
 line 14 function main: __builtin_add_overflow takes exactly 3 arguments, but 2 were provided$
diff --git a/regression/cbmc/gcc_builtin_add_overflow/type-conflict.desc b/regression/cbmc/gcc_builtin_add_overflow/type-conflict.desc
index 3b0ddcd2eb3..61831ad63ab 100644
--- a/regression/cbmc/gcc_builtin_add_overflow/type-conflict.desc
+++ b/regression/cbmc/gcc_builtin_add_overflow/type-conflict.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 type-conflict.c
 -DCONFLICT1
 line 12 function main: error: __builtin_add_overflow has signature __builtin_add_overflow\(integral, integral, integral\*\), but argument 3 \(r\) has type `signed int`$
diff --git a/regression/cbmc/gcc_builtin_mul_overflow/test.desc b/regression/cbmc/gcc_builtin_mul_overflow/test.desc
index 2a6f2826c3a..ad1a37607bc 100644
--- a/regression/cbmc/gcc_builtin_mul_overflow/test.desc
+++ b/regression/cbmc/gcc_builtin_mul_overflow/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 \[check_int.assertion.1\] line \d+ assertion !__builtin_smul_overflow\(1, 1, &result\): SUCCESS
diff --git a/regression/cbmc/gcc_builtin_sub_overflow/simplify.desc b/regression/cbmc/gcc_builtin_sub_overflow/simplify.desc
index 7a3c9680812..8545723aa6d 100644
--- a/regression/cbmc/gcc_builtin_sub_overflow/simplify.desc
+++ b/regression/cbmc/gcc_builtin_sub_overflow/simplify.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 simplify.c
 
 ^Generated 1 VCC\(s\), 0 remaining after simplification$
diff --git a/regression/cbmc/gcc_builtin_sub_overflow/test.desc b/regression/cbmc/gcc_builtin_sub_overflow/test.desc
index bb83cb1bd40..77d5ae2c43c 100644
--- a/regression/cbmc/gcc_builtin_sub_overflow/test.desc
+++ b/regression/cbmc/gcc_builtin_sub_overflow/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 \[check_int.assertion.1\] line \d+ assertion !__builtin_ssub_overflow\(1, 1, &result\): SUCCESS
diff --git a/regression/cbmc/gcc_builtin_va_arg_one/test.desc b/regression/cbmc/gcc_builtin_va_arg_one/test.desc
index 7bb309317e2..ccc7c4dd8e7 100644
--- a/regression/cbmc/gcc_builtin_va_arg_one/test.desc
+++ b/regression/cbmc/gcc_builtin_va_arg_one/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 function .* is not declared
diff --git a/regression/cbmc/gcc_c99-bool-1/test.desc b/regression/cbmc/gcc_c99-bool-1/test.desc
index db9df6a498e..d82c02459fc 100644
--- a/regression/cbmc/gcc_c99-bool-1/test.desc
+++ b/regression/cbmc/gcc_c99-bool-1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 c99-bool-1.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_conditional_expr1/test.desc b/regression/cbmc/gcc_conditional_expr1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/gcc_conditional_expr1/test.desc
+++ b/regression/cbmc/gcc_conditional_expr1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_local_label1/test.desc b/regression/cbmc/gcc_local_label1/test.desc
index bb401e87482..bb760ec3230 100644
--- a/regression/cbmc/gcc_local_label1/test.desc
+++ b/regression/cbmc/gcc_local_label1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 1 --no-unwinding-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/gcc_popcount1/test.desc b/regression/cbmc/gcc_popcount1/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/gcc_popcount1/test.desc
+++ b/regression/cbmc/gcc_popcount1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_statement_expression1/test.desc b/regression/cbmc/gcc_statement_expression1/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/gcc_statement_expression1/test.desc
+++ b/regression/cbmc/gcc_statement_expression1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_statement_expression2/test.desc b/regression/cbmc/gcc_statement_expression2/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/gcc_statement_expression2/test.desc
+++ b/regression/cbmc/gcc_statement_expression2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_statement_expression3/test.desc b/regression/cbmc/gcc_statement_expression3/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/gcc_statement_expression3/test.desc
+++ b/regression/cbmc/gcc_statement_expression3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_statement_expression4/test.desc b/regression/cbmc/gcc_statement_expression4/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/gcc_statement_expression4/test.desc
+++ b/regression/cbmc/gcc_statement_expression4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_statement_expression5/test.desc b/regression/cbmc/gcc_statement_expression5/test.desc
index 9f5bd9e1119..9c96469df12 100644
--- a/regression/cbmc/gcc_statement_expression5/test.desc
+++ b/regression/cbmc/gcc_statement_expression5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_switch_case_range1/test.desc b/regression/cbmc/gcc_switch_case_range1/test.desc
index f3a9f1a2097..8bcbbb03111 100644
--- a/regression/cbmc/gcc_switch_case_range1/test.desc
+++ b/regression/cbmc/gcc_switch_case_range1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/gcc_switch_case_range2/test.desc b/regression/cbmc/gcc_switch_case_range2/test.desc
index 819b231c7c3..cfa6e0b1e20 100644
--- a/regression/cbmc/gcc_switch_case_range2/test.desc
+++ b/regression/cbmc/gcc_switch_case_range2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/gcc_vector1/test.desc b/regression/cbmc/gcc_vector1/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/gcc_vector1/test.desc
+++ b/regression/cbmc/gcc_vector1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_vector2/test.desc b/regression/cbmc/gcc_vector2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/gcc_vector2/test.desc
+++ b/regression/cbmc/gcc_vector2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/gcc_vector3/test.desc b/regression/cbmc/gcc_vector3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/gcc_vector3/test.desc
+++ b/regression/cbmc/gcc_vector3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/goto1/test.desc b/regression/cbmc/goto1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/goto1/test.desc
+++ b/regression/cbmc/goto1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/goto2/test.desc b/regression/cbmc/goto2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/goto2/test.desc
+++ b/regression/cbmc/goto2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/goto3/test.desc b/regression/cbmc/goto3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/goto3/test.desc
+++ b/regression/cbmc/goto3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/goto4/test.desc b/regression/cbmc/goto4/test.desc
index 50f936b97ec..a38a3191f53 100644
--- a/regression/cbmc/goto4/test.desc
+++ b/regression/cbmc/goto4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 1 --unwinding-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/goto5/test.desc b/regression/cbmc/goto5/test.desc
index b59d561e220..6de79559914 100644
--- a/regression/cbmc/goto5/test.desc
+++ b/regression/cbmc/goto5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/graphml_witness1/test.desc b/regression/cbmc/graphml_witness1/test.desc
index b2879aba198..4b5b3029e4c 100644
--- a/regression/cbmc/graphml_witness1/test.desc
+++ b/regression/cbmc/graphml_witness1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --graphml-witness -
 ^EXIT=10$
diff --git a/regression/cbmc/graphml_witness2/test.desc b/regression/cbmc/graphml_witness2/test.desc
index b31243fbb28..e5766e2ba2e 100644
--- a/regression/cbmc/graphml_witness2/test.desc
+++ b/regression/cbmc/graphml_witness2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --graphml-witness - --unwindset main.0:1 --unwinding-assertions --stack-trace
 ^EXIT=10$
diff --git a/regression/cbmc/guard1/test.desc b/regression/cbmc/guard1/test.desc
index bc6f8fcb5d4..a6acc8553dc 100644
--- a/regression/cbmc/guard1/test.desc
+++ b/regression/cbmc/guard1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --depth 19
 ^EXIT=0$
diff --git a/regression/cbmc/havoc_choice/test.desc b/regression/cbmc/havoc_choice/test.desc
index f6a65685eb6..6a08a7aaecd 100644
--- a/regression/cbmc/havoc_choice/test.desc
+++ b/regression/cbmc/havoc_choice/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 \[main\.assertion\.1\] line \d+ assertion a \=\= \'a\'\: FAILURE
diff --git a/regression/cbmc/havoc_object1/full-slice.desc b/regression/cbmc/havoc_object1/full-slice.desc
index fe3706bdab4..49e5ecdf189 100644
--- a/regression/cbmc/havoc_object1/full-slice.desc
+++ b/regression/cbmc/havoc_object1/full-slice.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --full-slice
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_object1/test.desc b/regression/cbmc/havoc_object1/test.desc
index abe30d88695..432d0b5a4eb 100644
--- a/regression/cbmc/havoc_object1/test.desc
+++ b/regression/cbmc/havoc_object1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_array_slice_1.desc b/regression/cbmc/havoc_slice/test_array_slice_1.desc
index 5792188b700..fc0c3c011d0 100644
--- a/regression/cbmc/havoc_slice/test_array_slice_1.desc
+++ b/regression/cbmc/havoc_slice/test_array_slice_1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test_array_slice_1.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_array_slice_2.desc b/regression/cbmc/havoc_slice/test_array_slice_2.desc
index 14155278b3e..a6ae75f2598 100644
--- a/regression/cbmc/havoc_slice/test_array_slice_2.desc
+++ b/regression/cbmc/havoc_slice/test_array_slice_2.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test_array_slice_2.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_array_symbolic_size.desc b/regression/cbmc/havoc_slice/test_array_symbolic_size.desc
index b007c3048f0..a7497b00d14 100644
--- a/regression/cbmc/havoc_slice/test_array_symbolic_size.desc
+++ b/regression/cbmc/havoc_slice/test_array_symbolic_size.desc
@@ -1,4 +1,4 @@
-CORE thorough-paths thorough-smt-backend
+CORE thorough-paths thorough-smt-backend no-new-smt
 test_array_symbolic_size.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_nondet_conditional.desc b/regression/cbmc/havoc_slice/test_nondet_conditional.desc
index e1906ba8222..7792d8d9454 100644
--- a/regression/cbmc/havoc_slice/test_nondet_conditional.desc
+++ b/regression/cbmc/havoc_slice/test_nondet_conditional.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_nondet_conditional.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_a.desc b/regression/cbmc/havoc_slice/test_struct_a.desc
index 7b09ab9d65b..c125c7bcf14 100644
--- a/regression/cbmc/havoc_slice/test_struct_a.desc
+++ b/regression/cbmc/havoc_slice/test_struct_a.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_a.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_b.desc b/regression/cbmc/havoc_slice/test_struct_b.desc
index 6080d0294ad..746b21e772f 100644
--- a/regression/cbmc/havoc_slice/test_struct_b.desc
+++ b/regression/cbmc/havoc_slice/test_struct_b.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_b.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_b_slice.desc b/regression/cbmc/havoc_slice/test_struct_b_slice.desc
index c4cd5bcdf2c..e04607dc835 100644
--- a/regression/cbmc/havoc_slice/test_struct_b_slice.desc
+++ b/regression/cbmc/havoc_slice/test_struct_b_slice.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_b_slice.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_c.desc b/regression/cbmc/havoc_slice/test_struct_c.desc
index caae5ca8147..8cc8b55b0c5 100644
--- a/regression/cbmc/havoc_slice/test_struct_c.desc
+++ b/regression/cbmc/havoc_slice/test_struct_c.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_c.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_d.desc b/regression/cbmc/havoc_slice/test_struct_d.desc
index fc112312aa7..953bb0e9a47 100644
--- a/regression/cbmc/havoc_slice/test_struct_d.desc
+++ b/regression/cbmc/havoc_slice/test_struct_d.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_d.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_raw_bytes.desc b/regression/cbmc/havoc_slice/test_struct_raw_bytes.desc
index 9d9f481de40..940c000d0db 100644
--- a/regression/cbmc/havoc_slice/test_struct_raw_bytes.desc
+++ b/regression/cbmc/havoc_slice/test_struct_raw_bytes.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 test_struct_raw_bytes.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_union_a.desc b/regression/cbmc/havoc_slice/test_struct_union_a.desc
index 55629d1fe3a..b6874ea6458 100644
--- a/regression/cbmc/havoc_slice/test_struct_union_a.desc
+++ b/regression/cbmc/havoc_slice/test_struct_union_a.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_union_a.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_union_b.desc b/regression/cbmc/havoc_slice/test_struct_union_b.desc
index a73e87aeeb6..b7720fccaa0 100644
--- a/regression/cbmc/havoc_slice/test_struct_union_b.desc
+++ b/regression/cbmc/havoc_slice/test_struct_union_b.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_union_b.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_union_b_slice.desc b/regression/cbmc/havoc_slice/test_struct_union_b_slice.desc
index ddabb2d9cbd..c0cd9b09d98 100644
--- a/regression/cbmc/havoc_slice/test_struct_union_b_slice.desc
+++ b/regression/cbmc/havoc_slice/test_struct_union_b_slice.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_union_b_slice.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_union_c.desc b/regression/cbmc/havoc_slice/test_struct_union_c.desc
index a73e87aeeb6..b7720fccaa0 100644
--- a/regression/cbmc/havoc_slice/test_struct_union_c.desc
+++ b/regression/cbmc/havoc_slice/test_struct_union_c.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_union_b.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_struct_union_d.desc b/regression/cbmc/havoc_slice/test_struct_union_d.desc
index 988e086ac6d..55ff505960d 100644
--- a/regression/cbmc/havoc_slice/test_struct_union_d.desc
+++ b/regression/cbmc/havoc_slice/test_struct_union_d.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test_struct_union_d.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_whole_array.desc b/regression/cbmc/havoc_slice/test_whole_array.desc
index 7c6102e062f..93b0da7bc5d 100644
--- a/regression/cbmc/havoc_slice/test_whole_array.desc
+++ b/regression/cbmc/havoc_slice/test_whole_array.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test_whole_array.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice/test_whole_array_with_offset.desc b/regression/cbmc/havoc_slice/test_whole_array_with_offset.desc
index 2794cf08ab4..13751786467 100644
--- a/regression/cbmc/havoc_slice/test_whole_array_with_offset.desc
+++ b/regression/cbmc/havoc_slice/test_whole_array_with_offset.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test_whole_array_with_offset.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/havoc_slice_checks/full-slice.desc b/regression/cbmc/havoc_slice_checks/full-slice.desc
index 40d201dbe26..01af361a4ba 100644
--- a/regression/cbmc/havoc_slice_checks/full-slice.desc
+++ b/regression/cbmc/havoc_slice_checks/full-slice.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --full-slice
 ^\[main\.assertion\.\d+\] line 9 assertion havoc_slice W_OK.*: FAILURE$
diff --git a/regression/cbmc/havoc_slice_checks/test.desc b/regression/cbmc/havoc_slice_checks/test.desc
index b5d12522d0a..42b6f11e2c3 100644
--- a/regression/cbmc/havoc_slice_checks/test.desc
+++ b/regression/cbmc/havoc_slice_checks/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^\[main\.assertion\.\d+\] line 9 assertion havoc_slice W_OK.*: FAILURE$
diff --git a/regression/cbmc/havoc_undefined_functions/test.desc b/regression/cbmc/havoc_undefined_functions/test.desc
index 047a6acab1e..9a9f9b98bd0 100644
--- a/regression/cbmc/havoc_undefined_functions/test.desc
+++ b/regression/cbmc/havoc_undefined_functions/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --havoc-undefined-functions
 ^EXIT=10$
diff --git a/regression/cbmc/hex_string1/test.desc b/regression/cbmc/hex_string1/test.desc
index ad10409bb6f..12fc8ce06e1 100644
--- a/regression/cbmc/hex_string1/test.desc
+++ b/regression/cbmc/hex_string1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/hex_trace/test.desc b/regression/cbmc/hex_trace/test.desc
index 668421f7790..45811a0756c 100644
--- a/regression/cbmc/hex_trace/test.desc
+++ b/regression/cbmc/hex_trace/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --trace-hex --trace
 ^EXIT=10$
diff --git a/regression/cbmc/if1/test.desc b/regression/cbmc/if1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/if1/test.desc
+++ b/regression/cbmc/if1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/if2/test.desc b/regression/cbmc/if2/test.desc
index b59d561e220..6de79559914 100644
--- a/regression/cbmc/if2/test.desc
+++ b/regression/cbmc/if2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/if3/test.desc b/regression/cbmc/if3/test.desc
index b59d561e220..6de79559914 100644
--- a/regression/cbmc/if3/test.desc
+++ b/regression/cbmc/if3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/if4/test.desc b/regression/cbmc/if4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/if4/test.desc
+++ b/regression/cbmc/if4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/incomplete-sizeof/array.desc b/regression/cbmc/incomplete-sizeof/array.desc
index a1dd65b48f4..2287c0b74b7 100644
--- a/regression/cbmc/incomplete-sizeof/array.desc
+++ b/regression/cbmc/incomplete-sizeof/array.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 array.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/incomplete-sizeof/enum.desc b/regression/cbmc/incomplete-sizeof/enum.desc
index 1130d80ebf1..0b8b1902d86 100644
--- a/regression/cbmc/incomplete-sizeof/enum.desc
+++ b/regression/cbmc/incomplete-sizeof/enum.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 enum.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/incomplete-sizeof/struct.desc b/regression/cbmc/incomplete-sizeof/struct.desc
index 28d6e1ba462..ba39504cbb4 100644
--- a/regression/cbmc/incomplete-sizeof/struct.desc
+++ b/regression/cbmc/incomplete-sizeof/struct.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 struct.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/incomplete-sizeof/union.desc b/regression/cbmc/incomplete-sizeof/union.desc
index d334155e59e..7571d615926 100644
--- a/regression/cbmc/incomplete-sizeof/union.desc
+++ b/regression/cbmc/incomplete-sizeof/union.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 union.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/incomplete-structs/test.desc b/regression/cbmc/incomplete-structs/test.desc
index 669b2ee057d..f78df39a678 100644
--- a/regression/cbmc/incomplete-structs/test.desc
+++ b/regression/cbmc/incomplete-structs/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 typesmain.c
 types1.c types2.c types3.c
 warning: pointer parameter types differ between declaration and definition "bar"
diff --git a/regression/cbmc/inequality-with-constant-normalisation/test.desc b/regression/cbmc/inequality-with-constant-normalisation/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/inequality-with-constant-normalisation/test.desc
+++ b/regression/cbmc/inequality-with-constant-normalisation/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/inequality-with-constant-normalisation1/test.desc b/regression/cbmc/inequality-with-constant-normalisation1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/inequality-with-constant-normalisation1/test.desc
+++ b/regression/cbmc/inequality-with-constant-normalisation1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/inline1/test.desc b/regression/cbmc/inline1/test.desc
index 645f563290d..af20f90c655 100644
--- a/regression/cbmc/inline1/test.desc
+++ b/regression/cbmc/inline1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 module.c
 ^EXIT=0$
diff --git a/regression/cbmc/integer-assignments1/integer-typecheck.desc b/regression/cbmc/integer-assignments1/integer-typecheck.desc
index a4662f6fd42..612dfad45eb 100644
--- a/regression/cbmc/integer-assignments1/integer-typecheck.desc
+++ b/regression/cbmc/integer-assignments1/integer-typecheck.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-goto-functions
 ^[[:space:]]*ASSIGN main::1::b := main::1::b \* cast\(100, ℤ\)$
diff --git a/regression/cbmc/integer-assignments1/test.desc b/regression/cbmc/integer-assignments1/test.desc
index d2615e371c7..dd038ca9cf6 100644
--- a/regression/cbmc/integer-assignments1/test.desc
+++ b/regression/cbmc/integer-assignments1/test.desc
@@ -1,4 +1,4 @@
-CORE smt-backend broken-cprover-smt-backend
+CORE smt-backend broken-cprover-smt-backend no-new-smt
 main.c
 --trace --smt2
 ^EXIT=10$
diff --git a/regression/cbmc/integral-trace/test.desc b/regression/cbmc/integral-trace/test.desc
index e856567f07e..8d80b03d193 100644
--- a/regression/cbmc/integral-trace/test.desc
+++ b/regression/cbmc/integral-trace/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 --trace --xml-ui
 activate-multi-line-match
diff --git a/regression/cbmc/issue_5952_soundness_bug_smt_encoding/test_original.desc b/regression/cbmc/issue_5952_soundness_bug_smt_encoding/test_original.desc
index 808836019d7..8bdfaffafb4 100644
--- a/regression/cbmc/issue_5952_soundness_bug_smt_encoding/test_original.desc
+++ b/regression/cbmc/issue_5952_soundness_bug_smt_encoding/test_original.desc
@@ -1,4 +1,4 @@
-CORE smt-backend new-smt-backend
+CORE smt-backend
 original_repro.c
 --smt2
 ^EXIT=0$
diff --git a/regression/cbmc/issue_5952_soundness_bug_smt_encoding/test_short.desc b/regression/cbmc/issue_5952_soundness_bug_smt_encoding/test_short.desc
index c733fcb1217..2369a0bd857 100644
--- a/regression/cbmc/issue_5952_soundness_bug_smt_encoding/test_short.desc
+++ b/regression/cbmc/issue_5952_soundness_bug_smt_encoding/test_short.desc
@@ -1,4 +1,4 @@
-CORE smt-backend new-smt-backend
+CORE smt-backend
 short.c
 --smt2
 ^EXIT=0$
diff --git a/regression/cbmc/json-interface1/test.desc b/regression/cbmc/json-interface1/test.desc
index 998a2a65201..083df61a021 100644
--- a/regression/cbmc/json-interface1/test.desc
+++ b/regression/cbmc/json-interface1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 --json-interface
 < test.json
 activate-multi-line-match
diff --git a/regression/cbmc/json-interface1/test_wrong_flag.desc b/regression/cbmc/json-interface1/test_wrong_flag.desc
index b57e4d64a9a..b1210068e2e 100644
--- a/regression/cbmc/json-interface1/test_wrong_flag.desc
+++ b/regression/cbmc/json-interface1/test_wrong_flag.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 --json-interface
 < test_wrong_flag.json
 ^EXIT=6$
diff --git a/regression/cbmc/json-interface1/test_wrong_option.desc b/regression/cbmc/json-interface1/test_wrong_option.desc
index 08080cbf4f5..c1b57e8574b 100644
--- a/regression/cbmc/json-interface1/test_wrong_option.desc
+++ b/regression/cbmc/json-interface1/test_wrong_option.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 --json-interface
 < test_wrong_option.json
 ^EXIT=6$
diff --git a/regression/cbmc/json-ui/no_entry.desc b/regression/cbmc/json-ui/no_entry.desc
index 88514dddbe5..ea376532787 100644
--- a/regression/cbmc/json-ui/no_entry.desc
+++ b/regression/cbmc/json-ui/no_entry.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 no_entry.c
 --json-ui
 activate-multi-line-match
diff --git a/regression/cbmc/json-ui/syntax_error.desc b/regression/cbmc/json-ui/syntax_error.desc
index 4a4942ac72d..b7c3530a7bc 100644
--- a/regression/cbmc/json-ui/syntax_error.desc
+++ b/regression/cbmc/json-ui/syntax_error.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 syntax_error.c
 --json-ui
 activate-multi-line-match
diff --git a/regression/cbmc/json1/test.desc b/regression/cbmc/json1/test.desc
index 1a15bc47af9..b9eb6a30118 100644
--- a/regression/cbmc/json1/test.desc
+++ b/regression/cbmc/json1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --json-ui --stop-on-fail
 activate-multi-line-match
diff --git a/regression/cbmc/lhs-pointer-aliases-constant/test.desc b/regression/cbmc/lhs-pointer-aliases-constant/test.desc
index f1d09136c55..bc3c7c620ad 100644
--- a/regression/cbmc/lhs-pointer-aliases-constant/test.desc
+++ b/regression/cbmc/lhs-pointer-aliases-constant/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 test.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/link_json_symtabs/test.desc b/regression/cbmc/link_json_symtabs/test.desc
index c5a0c306551..c6f6ebe9068 100644
--- a/regression/cbmc/link_json_symtabs/test.desc
+++ b/regression/cbmc/link_json_symtabs/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 one.json_symtab
 two.json_symtab
 ^EXIT=0$
diff --git a/regression/cbmc/little-endian-array1/test.desc b/regression/cbmc/little-endian-array1/test.desc
index b177f2412ca..9845e70d84b 100644
--- a/regression/cbmc/little-endian-array1/test.desc
+++ b/regression/cbmc/little-endian-array1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/locations1/test.desc b/regression/cbmc/locations1/test.desc
index 1f1a6e1ed93..12c44d464cd 100644
--- a/regression/cbmc/locations1/test.desc
+++ b/regression/cbmc/locations1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --signed-overflow-check
 ^EXIT=0$
diff --git a/regression/cbmc/loophead-trace/test-json.desc b/regression/cbmc/loophead-trace/test-json.desc
index a8c254405af..9754b659021 100644
--- a/regression/cbmc/loophead-trace/test-json.desc
+++ b/regression/cbmc/loophead-trace/test-json.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --unwind 6 test.c --trace --json-ui --partial-loops --slice-formula
 activate-multi-line-match
diff --git a/regression/cbmc/loophead-trace/test-xml.desc b/regression/cbmc/loophead-trace/test-xml.desc
index 17bfd844b3f..b039701d87d 100644
--- a/regression/cbmc/loophead-trace/test-xml.desc
+++ b/regression/cbmc/loophead-trace/test-xml.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --unwind 6 test.c --trace --xml-ui --partial-loops --slice-formula
 activate-multi-line-match
diff --git a/regression/cbmc/malloc-may-fail/test.desc b/regression/cbmc/malloc-may-fail/test.desc
index 383fe856bee..fb64c203397 100644
--- a/regression/cbmc/malloc-may-fail/test.desc
+++ b/regression/cbmc/malloc-may-fail/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --malloc-may-fail --malloc-fail-null
 ^EXIT=10$
diff --git a/regression/cbmc/malloc-may-fail/test_without_option.desc b/regression/cbmc/malloc-may-fail/test_without_option.desc
index 776b1df6563..f0c5e3ae1ef 100644
--- a/regression/cbmc/malloc-may-fail/test_without_option.desc
+++ b/regression/cbmc/malloc-may-fail/test_without_option.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/malloc-too-large/largest_representable.desc b/regression/cbmc/malloc-too-large/largest_representable.desc
index 8f0bbae1bd7..d6f9fd63d14 100644
--- a/regression/cbmc/malloc-too-large/largest_representable.desc
+++ b/regression/cbmc/malloc-too-large/largest_representable.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 largest_representable.c
 --malloc-fail-assert
 ^EXIT=0$
diff --git a/regression/cbmc/malloc-too-large/max_size.desc b/regression/cbmc/malloc-too-large/max_size.desc
index 79bc9dd5320..783470072e3 100644
--- a/regression/cbmc/malloc-too-large/max_size.desc
+++ b/regression/cbmc/malloc-too-large/max_size.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 max_size.c
 --malloc-fail-assert
 ^EXIT=10$
diff --git a/regression/cbmc/malloc-too-large/one_byte_too_large.desc b/regression/cbmc/malloc-too-large/one_byte_too_large.desc
index e1a2505daf8..dbec5e98957 100644
--- a/regression/cbmc/malloc-too-large/one_byte_too_large.desc
+++ b/regression/cbmc/malloc-too-large/one_byte_too_large.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 one_byte_too_large.c
 --malloc-fail-null
 ^EXIT=10$
diff --git a/regression/cbmc/member1/test.desc b/regression/cbmc/member1/test.desc
index 9dfd17b7527..22feeb5e857 100644
--- a/regression/cbmc/member1/test.desc
+++ b/regression/cbmc/member1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/memory_allocation1/test.desc b/regression/cbmc/memory_allocation1/test.desc
index 663bbf6176b..8f8e0f557a1 100644
--- a/regression/cbmc/memory_allocation1/test.desc
+++ b/regression/cbmc/memory_allocation1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend new-smt-backend
+CORE broken-smt-backend
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/memory_allocation2/test.desc b/regression/cbmc/memory_allocation2/test.desc
index e0d2061483c..879dc7a01f2 100644
--- a/regression/cbmc/memory_allocation2/test.desc
+++ b/regression/cbmc/memory_allocation2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --bounds-check
 ^EXIT=10$
diff --git a/regression/cbmc/memset1/test.desc b/regression/cbmc/memset1/test.desc
index db4ec3e73bf..35db5b73ebd 100644
--- a/regression/cbmc/memset1/test.desc
+++ b/regression/cbmc/memset1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/memset2/test.desc b/regression/cbmc/memset2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/memset2/test.desc
+++ b/regression/cbmc/memset2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/memset3/test.desc b/regression/cbmc/memset3/test.desc
index fea96178727..be58134bdcb 100644
--- a/regression/cbmc/memset3/test.desc
+++ b/regression/cbmc/memset3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/memset_null/test.desc b/regression/cbmc/memset_null/test.desc
index bef94363c5e..6984ae9e29d 100644
--- a/regression/cbmc/memset_null/test.desc
+++ b/regression/cbmc/memset_null/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^\[main.precondition_instance.1\] line .* memset destination region writeable: FAILURE$
diff --git a/regression/cbmc/mm_io1/test.desc b/regression/cbmc/mm_io1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/mm_io1/test.desc
+++ b/regression/cbmc/mm_io1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/multiple-goto-traces/test.desc b/regression/cbmc/multiple-goto-traces/test.desc
index 96a326299a7..fb8bbd2fa7e 100644
--- a/regression/cbmc/multiple-goto-traces/test.desc
+++ b/regression/cbmc/multiple-goto-traces/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --trace
 activate-multi-line-match
diff --git a/regression/cbmc/nested_label1/test.desc b/regression/cbmc/nested_label1/test.desc
index 22a71cb70eb..401b46a8d28 100644
--- a/regression/cbmc/nested_label1/test.desc
+++ b/regression/cbmc/nested_label1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/no-propagation/test.desc b/regression/cbmc/no-propagation/test.desc
index e7e387fff69..abf436bb9e3 100644
--- a/regression/cbmc/no-propagation/test.desc
+++ b/regression/cbmc/no-propagation/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-propagation
 Generated 1 VCC\(s\), 1 remaining after simplification
diff --git a/regression/cbmc/no_nondet_static/test.desc b/regression/cbmc/no_nondet_static/test.desc
index 4f2a282f623..feebbad71a8 100644
--- a/regression/cbmc/no_nondet_static/test.desc
+++ b/regression/cbmc/no_nondet_static/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --nondet-static
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/nondet-pointer/nondet-pointer1.desc b/regression/cbmc/nondet-pointer/nondet-pointer1.desc
index eef0545637e..d4834e848eb 100644
--- a/regression/cbmc/nondet-pointer/nondet-pointer1.desc
+++ b/regression/cbmc/nondet-pointer/nondet-pointer1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 nondet-pointer1.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/nondet-pointer/nondet-pointer2.desc b/regression/cbmc/nondet-pointer/nondet-pointer2.desc
index eef0545637e..d4834e848eb 100644
--- a/regression/cbmc/nondet-pointer/nondet-pointer2.desc
+++ b/regression/cbmc/nondet-pointer/nondet-pointer2.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 nondet-pointer1.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/nondet-pointer/nondet-pointer3.desc b/regression/cbmc/nondet-pointer/nondet-pointer3.desc
index eef0545637e..d4834e848eb 100644
--- a/regression/cbmc/nondet-pointer/nondet-pointer3.desc
+++ b/regression/cbmc/nondet-pointer/nondet-pointer3.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 nondet-pointer1.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/nondet-pointer/nondet-pointer4.desc b/regression/cbmc/nondet-pointer/nondet-pointer4.desc
index eef0545637e..d4834e848eb 100644
--- a/regression/cbmc/nondet-pointer/nondet-pointer4.desc
+++ b/regression/cbmc/nondet-pointer/nondet-pointer4.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 nondet-pointer1.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/nondet-pointer/nondet-pointer5.desc b/regression/cbmc/nondet-pointer/nondet-pointer5.desc
index eef0545637e..d4834e848eb 100644
--- a/regression/cbmc/nondet-pointer/nondet-pointer5.desc
+++ b/regression/cbmc/nondet-pointer/nondet-pointer5.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 nondet-pointer1.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/noop1/test.desc b/regression/cbmc/noop1/test.desc
index 20a75a6d62d..d9e8f9ae8b8 100644
--- a/regression/cbmc/noop1/test.desc
+++ b/regression/cbmc/noop1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 -winx64
 ^EXIT=0$
diff --git a/regression/cbmc/noop2/test.desc b/regression/cbmc/noop2/test.desc
index 86980b336e4..7057e2afbe7 100644
--- a/regression/cbmc/noop2/test.desc
+++ b/regression/cbmc/noop2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 -win32
 ^EXIT=0$
diff --git a/regression/cbmc/null1/test.desc b/regression/cbmc/null1/test.desc
index dd1f74fd067..376d43d5dfa 100644
--- a/regression/cbmc/null1/test.desc
+++ b/regression/cbmc/null1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/null2/test.desc b/regression/cbmc/null2/test.desc
index a8631c101f9..1d6654a4859 100644
--- a/regression/cbmc/null2/test.desc
+++ b/regression/cbmc/null2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/null3/test.desc b/regression/cbmc/null3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/null3/test.desc
+++ b/regression/cbmc/null3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/null4/test.desc b/regression/cbmc/null4/test.desc
index f6507f3600b..926be8072d2 100644
--- a/regression/cbmc/null4/test.desc
+++ b/regression/cbmc/null4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/null5/test.desc b/regression/cbmc/null5/test.desc
index f6507f3600b..926be8072d2 100644
--- a/regression/cbmc/null5/test.desc
+++ b/regression/cbmc/null5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/null6/test.desc b/regression/cbmc/null6/test.desc
index 9a8e1f01802..b312cea5fe3 100644
--- a/regression/cbmc/null6/test.desc
+++ b/regression/cbmc/null6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/null7/test.desc b/regression/cbmc/null7/test.desc
index 33fddc1a285..45989540170 100644
--- a/regression/cbmc/null7/test.desc
+++ b/regression/cbmc/null7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/null8/test.desc b/regression/cbmc/null8/test.desc
index 33b97c40e57..f2bcf68da06 100644
--- a/regression/cbmc/null8/test.desc
+++ b/regression/cbmc/null8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 Generated 1 VCC\(s\), 0 remaining after simplification
diff --git a/regression/cbmc/object-bits-parsing/non_numeric.desc b/regression/cbmc/object-bits-parsing/non_numeric.desc
index b4ad2a40335..ca52caf9c89 100644
--- a/regression/cbmc/object-bits-parsing/non_numeric.desc
+++ b/regression/cbmc/object-bits-parsing/non_numeric.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --object-bits foobar
 Value of "foobar" given for object-bits is not a valid unsigned integer.
diff --git a/regression/cbmc/object-bits-parsing/too_large.desc b/regression/cbmc/object-bits-parsing/too_large.desc
index 41581fd9d7c..4bf82c9dc95 100644
--- a/regression/cbmc/object-bits-parsing/too_large.desc
+++ b/regression/cbmc/object-bits-parsing/too_large.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --object-bits 65
 Value of "65" given for object-bits is out of range.
diff --git a/regression/cbmc/object-bits-parsing/valid.desc b/regression/cbmc/object-bits-parsing/valid.desc
index bfde0d5699f..6cf345f5522 100644
--- a/regression/cbmc/object-bits-parsing/valid.desc
+++ b/regression/cbmc/object-bits-parsing/valid.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --object-bits 8
 ^EXIT=0$
diff --git a/regression/cbmc/object-bits-parsing/zero.desc b/regression/cbmc/object-bits-parsing/zero.desc
index 1603bf99d37..4471b3c7337 100644
--- a/regression/cbmc/object-bits-parsing/zero.desc
+++ b/regression/cbmc/object-bits-parsing/zero.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --object-bits 0
 Value of "0" given for object-bits is out of range.
diff --git a/regression/cbmc/offsetof1/test.desc b/regression/cbmc/offsetof1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/offsetof1/test.desc
+++ b/regression/cbmc/offsetof1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/overflow/leftshift_overflow-c89.desc b/regression/cbmc/overflow/leftshift_overflow-c89.desc
index 0e7b71047b8..78ccc75aa8a 100644
--- a/regression/cbmc/overflow/leftshift_overflow-c89.desc
+++ b/regression/cbmc/overflow/leftshift_overflow-c89.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 leftshift_overflow.c
 --signed-overflow-check --c89
 ^EXIT=10$
diff --git a/regression/cbmc/overflow/leftshift_overflow-c99-full-slice.desc b/regression/cbmc/overflow/leftshift_overflow-c99-full-slice.desc
index 6e59198bcab..4059cdb1c85 100644
--- a/regression/cbmc/overflow/leftshift_overflow-c99-full-slice.desc
+++ b/regression/cbmc/overflow/leftshift_overflow-c99-full-slice.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 leftshift_overflow.c
 --signed-overflow-check --c99 --full-slice
 ^EXIT=10$
diff --git a/regression/cbmc/overflow/leftshift_overflow-c99.desc b/regression/cbmc/overflow/leftshift_overflow-c99.desc
index 6bd817096c3..5104954ed84 100644
--- a/regression/cbmc/overflow/leftshift_overflow-c99.desc
+++ b/regression/cbmc/overflow/leftshift_overflow-c99.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 leftshift_overflow.c
 --signed-overflow-check --c99
 ^EXIT=10$
diff --git a/regression/cbmc/overflow/mod_overflow.desc b/regression/cbmc/overflow/mod_overflow.desc
index 3dd44700a71..fd1ab486ff6 100644
--- a/regression/cbmc/overflow/mod_overflow.desc
+++ b/regression/cbmc/overflow/mod_overflow.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 mod_overflow.c
 --signed-overflow-check
 ^EXIT=10$
diff --git a/regression/cbmc/overflow/signed_addition_overflow1.desc b/regression/cbmc/overflow/signed_addition_overflow1.desc
index 8f0a19c0056..0db00fffad6 100644
--- a/regression/cbmc/overflow/signed_addition_overflow1.desc
+++ b/regression/cbmc/overflow/signed_addition_overflow1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 signed_addition_overflow1.c
 --signed-overflow-check
 ^EXIT=10$
diff --git a/regression/cbmc/overflow/signed_addition_overflow2.desc b/regression/cbmc/overflow/signed_addition_overflow2.desc
index c5cd82b695d..2e02a2230df 100644
--- a/regression/cbmc/overflow/signed_addition_overflow2.desc
+++ b/regression/cbmc/overflow/signed_addition_overflow2.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 signed_addition_overflow2.c
 --signed-overflow-check
 ^EXIT=10$
diff --git a/regression/cbmc/overflow/signed_addition_overflow3.desc b/regression/cbmc/overflow/signed_addition_overflow3.desc
index f4a7e139afc..9710d0ad847 100644
--- a/regression/cbmc/overflow/signed_addition_overflow3.desc
+++ b/regression/cbmc/overflow/signed_addition_overflow3.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 signed_addition_overflow3.c
 --signed-overflow-check --conversion-check
 ^EXIT=10$
diff --git a/regression/cbmc/overflow/signed_addition_overflow4.desc b/regression/cbmc/overflow/signed_addition_overflow4.desc
index 85044403a64..b532dbb788e 100644
--- a/regression/cbmc/overflow/signed_addition_overflow4.desc
+++ b/regression/cbmc/overflow/signed_addition_overflow4.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 signed_addition_overflow4.c
 --signed-overflow-check --conversion-check
 ^EXIT=10$
diff --git a/regression/cbmc/overflow/signed_multiplication1.desc b/regression/cbmc/overflow/signed_multiplication1.desc
index 65f1aba2329..3e243e13501 100644
--- a/regression/cbmc/overflow/signed_multiplication1.desc
+++ b/regression/cbmc/overflow/signed_multiplication1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 signed_multiplication1.c
 --signed-overflow-check
 ^EXIT=0$
diff --git a/regression/cbmc/overflow/signed_subtraction1.desc b/regression/cbmc/overflow/signed_subtraction1.desc
index cc170ec9e4d..fad1fa02144 100644
--- a/regression/cbmc/overflow/signed_subtraction1.desc
+++ b/regression/cbmc/overflow/signed_subtraction1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 signed_subtraction1.c
 --signed-overflow-check
 ^EXIT=0$
diff --git a/regression/cbmc/overflow/unary_minus_overflow.desc b/regression/cbmc/overflow/unary_minus_overflow.desc
index 78ba903c155..2766431e519 100644
--- a/regression/cbmc/overflow/unary_minus_overflow.desc
+++ b/regression/cbmc/overflow/unary_minus_overflow.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 unary_minus_overflow.c
 --signed-overflow-check --unsigned-overflow-check
 ^EXIT=10$
diff --git a/regression/cbmc/path-branch-pointer-call/test.desc b/regression/cbmc/path-branch-pointer-call/test.desc
index a3434a8d52e..5ea1d977cab 100644
--- a/regression/cbmc/path-branch-pointer-call/test.desc
+++ b/regression/cbmc/path-branch-pointer-call/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --paths lifo
 ^EXIT=0$
diff --git a/regression/cbmc/path-per-path-vccs/test.desc b/regression/cbmc/path-per-path-vccs/test.desc
index 09f6e02de12..d399e5b2ddb 100644
--- a/regression/cbmc/path-per-path-vccs/test.desc
+++ b/regression/cbmc/path-per-path-vccs/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --paths lifo --unwind 1 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/phi-merge_uninitialized_values/dynamic.desc b/regression/cbmc/phi-merge_uninitialized_values/dynamic.desc
index 23fe3760425..94054b4d376 100644
--- a/regression/cbmc/phi-merge_uninitialized_values/dynamic.desc
+++ b/regression/cbmc/phi-merge_uninitialized_values/dynamic.desc
@@ -1,4 +1,4 @@
-CORE  new-smt-backend
+CORE 
 test.c
 --function dynamicAllocationUninitialized --show-vcc
 activate-multi-line-match
diff --git a/regression/cbmc/phi-merge_uninitialized_values/global.desc b/regression/cbmc/phi-merge_uninitialized_values/global.desc
index b561d311e7e..5891ab3a6bb 100644
--- a/regression/cbmc/phi-merge_uninitialized_values/global.desc
+++ b/regression/cbmc/phi-merge_uninitialized_values/global.desc
@@ -1,4 +1,4 @@
-CORE  new-smt-backend
+CORE 
 test.c
 --function globalUninitialized --show-vcc
 activate-multi-line-match
diff --git a/regression/cbmc/phi-merge_uninitialized_values/local.desc b/regression/cbmc/phi-merge_uninitialized_values/local.desc
index b9c91fa87f1..d588bf234e2 100644
--- a/regression/cbmc/phi-merge_uninitialized_values/local.desc
+++ b/regression/cbmc/phi-merge_uninitialized_values/local.desc
@@ -1,4 +1,4 @@
-CORE  new-smt-backend
+CORE 
 test.c
 --function localUninitialized --show-vcc
 activate-multi-line-match
diff --git a/regression/cbmc/phi-merge_uninitialized_values/static_local.desc b/regression/cbmc/phi-merge_uninitialized_values/static_local.desc
index 37f196ebabe..0896809ce1d 100644
--- a/regression/cbmc/phi-merge_uninitialized_values/static_local.desc
+++ b/regression/cbmc/phi-merge_uninitialized_values/static_local.desc
@@ -1,4 +1,4 @@
-CORE  new-smt-backend
+CORE 
 test.c
 --function staticLocalUninitialized --show-vcc
 activate-multi-line-match
diff --git a/regression/cbmc/pointer-check-01/test.desc b/regression/cbmc/pointer-check-01/test.desc
index fea45a594cb..f86851a0aa1 100644
--- a/regression/cbmc/pointer-check-01/test.desc
+++ b/regression/cbmc/pointer-check-01/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/pointer-check-02/test.desc b/regression/cbmc/pointer-check-02/test.desc
index 9cebe7a9203..2e0645ee56a 100644
--- a/regression/cbmc/pointer-check-02/test.desc
+++ b/regression/cbmc/pointer-check-02/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/pointer-extra-checks/test.desc b/regression/cbmc/pointer-extra-checks/test.desc
index 528cf397a1b..b793e876bf8 100644
--- a/regression/cbmc/pointer-extra-checks/test.desc
+++ b/regression/cbmc/pointer-extra-checks/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/pointer-function-parameters-struct-mutual-recursion/test.desc b/regression/cbmc/pointer-function-parameters-struct-mutual-recursion/test.desc
index bf0755102ff..7b82cc87646 100644
--- a/regression/cbmc/pointer-function-parameters-struct-mutual-recursion/test.desc
+++ b/regression/cbmc/pointer-function-parameters-struct-mutual-recursion/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --function func --min-null-tree-depth 10 --max-nondet-tree-depth 3 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/pointer-function-parameters-struct-non-recursive/test.desc b/regression/cbmc/pointer-function-parameters-struct-non-recursive/test.desc
index a90929db40c..7a63a07d95e 100644
--- a/regression/cbmc/pointer-function-parameters-struct-non-recursive/test.desc
+++ b/regression/cbmc/pointer-function-parameters-struct-non-recursive/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --function func --min-null-tree-depth 10
 ^EXIT=10$
diff --git a/regression/cbmc/pointer-function-parameters-struct-simple-recursion-2/test.desc b/regression/cbmc/pointer-function-parameters-struct-simple-recursion-2/test.desc
index d14ccb163be..716670ff6f7 100644
--- a/regression/cbmc/pointer-function-parameters-struct-simple-recursion-2/test.desc
+++ b/regression/cbmc/pointer-function-parameters-struct-simple-recursion-2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --function func --min-null-tree-depth 10 --max-nondet-tree-depth 2 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/pointer-function-parameters-struct-simple-recursion/test.desc b/regression/cbmc/pointer-function-parameters-struct-simple-recursion/test.desc
index bf0755102ff..7b82cc87646 100644
--- a/regression/cbmc/pointer-function-parameters-struct-simple-recursion/test.desc
+++ b/regression/cbmc/pointer-function-parameters-struct-simple-recursion/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --function func --min-null-tree-depth 10 --max-nondet-tree-depth 3 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/pointer-function-parameters/test.desc b/regression/cbmc/pointer-function-parameters/test.desc
index b9bf5e8ae2a..7529d7e143f 100644
--- a/regression/cbmc/pointer-function-parameters/test.desc
+++ b/regression/cbmc/pointer-function-parameters/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --function f
 ^EXIT=0$
diff --git a/regression/cbmc/pointer-offset-01/test.desc b/regression/cbmc/pointer-offset-01/test.desc
index a82fd91fad4..9ab90ca43ae 100644
--- a/regression/cbmc/pointer-offset-01/test.desc
+++ b/regression/cbmc/pointer-offset-01/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --trace
 ^\s*ub.*=(\(char \*\)&)?dynamic_object \+ \d+
diff --git a/regression/cbmc/pointer-overflow1/test.desc b/regression/cbmc/pointer-overflow1/test.desc
index a38989b4d0d..af678d78121 100644
--- a/regression/cbmc/pointer-overflow1/test.desc
+++ b/regression/cbmc/pointer-overflow1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-overflow-check --unsigned-overflow-check
 ^EXIT=10$
diff --git a/regression/cbmc/pointer-overflow2/test.desc b/regression/cbmc/pointer-overflow2/test.desc
index cc01b9c5024..e00d2d72ddf 100644
--- a/regression/cbmc/pointer-overflow2/test.desc
+++ b/regression/cbmc/pointer-overflow2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-overflow-check
 ^EXIT=0$
diff --git a/regression/cbmc/pointer-overflow3/no-simplify.desc b/regression/cbmc/pointer-overflow3/no-simplify.desc
index fb659529422..30977ffdd2b 100644
--- a/regression/cbmc/pointer-overflow3/no-simplify.desc
+++ b/regression/cbmc/pointer-overflow3/no-simplify.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --pointer-overflow-check --no-simplify
 ^\[main.pointer_arithmetic.\d+\] line 6 pointer arithmetic: pointer outside object bounds in p \+ (\(signed (long (long )?)?int\))?10: FAILURE
diff --git a/regression/cbmc/pointer-overflow3/test.desc b/regression/cbmc/pointer-overflow3/test.desc
index e781ff58a46..8cde100fe50 100644
--- a/regression/cbmc/pointer-overflow3/test.desc
+++ b/regression/cbmc/pointer-overflow3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-overflow-check
 ^\[main.pointer_arithmetic.\d+\] line 6 pointer arithmetic: pointer outside object bounds in p \+ (\(signed (long (long )?)?int\))?10: FAILURE
diff --git a/regression/cbmc/pointer-overflow4/test.desc b/regression/cbmc/pointer-overflow4/test.desc
index 9db69c89e6c..0c24bc9b6df 100644
--- a/regression/cbmc/pointer-overflow4/test.desc
+++ b/regression/cbmc/pointer-overflow4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-overflow-check
 ^\[main.overflow.1\] line 10 arithmetic overflow on signed \* in (0x)?[0-9a-fA-F]+l* \* \(signed (long (long )?)?int\)4ul*: FAILURE$
diff --git a/regression/cbmc/pointer-predicates/at_bounds1.desc b/regression/cbmc/pointer-predicates/at_bounds1.desc
index ab59233baf9..c2251b5db67 100644
--- a/regression/cbmc/pointer-predicates/at_bounds1.desc
+++ b/regression/cbmc/pointer-predicates/at_bounds1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 at_bounds1.c
 --pointer-primitive-check --malloc-fail-null
 ^\[main.pointer_primitives.\d+\] line 13 pointer outside object bounds in R_OK\(q \+ (\(signed (long (long )?)?int\))?1, (\(unsigned (long (long )?)?int\))?0\): FAILURE$
diff --git a/regression/cbmc/pointer-predicates/in_range1.desc b/regression/cbmc/pointer-predicates/in_range1.desc
index c33bb53ca08..3465178e375 100644
--- a/regression/cbmc/pointer-predicates/in_range1.desc
+++ b/regression/cbmc/pointer-predicates/in_range1.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 in_range1.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/pointer-primitive-check-01/test.desc b/regression/cbmc/pointer-primitive-check-01/test.desc
index 721e9542d0b..fb52df0c4de 100644
--- a/regression/cbmc/pointer-primitive-check-01/test.desc
+++ b/regression/cbmc/pointer-primitive-check-01/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-primitive-check
 ^EXIT=10$
diff --git a/regression/cbmc/pointer-primitive-check-02/test.desc b/regression/cbmc/pointer-primitive-check-02/test.desc
index dae95109dcf..315e2d255c7 100644
--- a/regression/cbmc/pointer-primitive-check-02/test.desc
+++ b/regression/cbmc/pointer-primitive-check-02/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-primitive-check
 ^EXIT=0$
diff --git a/regression/cbmc/pointer-primitive-check-04/test.desc b/regression/cbmc/pointer-primitive-check-04/test.desc
index 160942f8359..3c9f2d5f074 100644
--- a/regression/cbmc/pointer-primitive-check-04/test.desc
+++ b/regression/cbmc/pointer-primitive-check-04/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-primitive-check
 ^EXIT=10$
diff --git a/regression/cbmc/pointer-to-struct-with-flexible-array-member-as-parameter-to-entry-point/test.desc b/regression/cbmc/pointer-to-struct-with-flexible-array-member-as-parameter-to-entry-point/test.desc
index e792512536c..a26406a9683 100644
--- a/regression/cbmc/pointer-to-struct-with-flexible-array-member-as-parameter-to-entry-point/test.desc
+++ b/regression/cbmc/pointer-to-struct-with-flexible-array-member-as-parameter-to-entry-point/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --function testFunc
 ^EXIT=0$
diff --git a/regression/cbmc/points-to-sets/test.desc b/regression/cbmc/points-to-sets/test.desc
index e95a06651d8..26085c6bef0 100644
--- a/regression/cbmc/points-to-sets/test.desc
+++ b/regression/cbmc/points-to-sets/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --show-points-to-sets
 ^EXIT=1$
diff --git a/regression/cbmc/points-to-sets/test_json.desc b/regression/cbmc/points-to-sets/test_json.desc
index 1cdd3b6ff30..3ee78b26f91 100644
--- a/regression/cbmc/points-to-sets/test_json.desc
+++ b/regression/cbmc/points-to-sets/test_json.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-points-to-sets --json-ui
 activate-multi-line-match
diff --git a/regression/cbmc/points-to-sets/test_xml.desc b/regression/cbmc/points-to-sets/test_xml.desc
index f4a3654cd5b..d4bf269cbb3 100644
--- a/regression/cbmc/points-to-sets/test_xml.desc
+++ b/regression/cbmc/points-to-sets/test_xml.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-points-to-sets --xml-ui
 ^EXIT=1$
diff --git a/regression/cbmc/pragma_cprover1/test.desc b/regression/cbmc/pragma_cprover1/test.desc
index a7d256af3c6..487a7c80d7b 100644
--- a/regression/cbmc/pragma_cprover1/test.desc
+++ b/regression/cbmc/pragma_cprover1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --signed-overflow-check --bounds-check
 line 14 array 'y' upper bound in y\[(\(signed long( long)? int\))?1\]: FAILURE$
diff --git a/regression/cbmc/pragma_cprover2/test.desc b/regression/cbmc/pragma_cprover2/test.desc
index e55c0ab42e1..fc1f888dfcf 100644
--- a/regression/cbmc/pragma_cprover2/test.desc
+++ b/regression/cbmc/pragma_cprover2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --signed-overflow-check
 ^\[main.overflow\.1\] line 21 arithmetic overflow on signed \+ in n \+ n: FAILURE$
diff --git a/regression/cbmc/pragma_cprover3/test.desc b/regression/cbmc/pragma_cprover3/test.desc
index b00169d9ce2..c7e1faaa966 100644
--- a/regression/cbmc/pragma_cprover3/test.desc
+++ b/regression/cbmc/pragma_cprover3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-primitive-check
 ^main.c function main$
diff --git a/regression/cbmc/pragma_cprover_enable1/test.desc b/regression/cbmc/pragma_cprover_enable1/test.desc
index d00a262ecec..8113775430e 100644
--- a/regression/cbmc/pragma_cprover_enable1/test.desc
+++ b/regression/cbmc/pragma_cprover_enable1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^\[main\.array_bounds\.1\] line \d+ array 'y' upper bound.*FAILURE$
diff --git a/regression/cbmc/pragma_cprover_enable2/test.desc b/regression/cbmc/pragma_cprover_enable2/test.desc
index 038a1451b1e..9ddbded4bb7 100644
--- a/regression/cbmc/pragma_cprover_enable2/test.desc
+++ b/regression/cbmc/pragma_cprover_enable2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^\[main\.overflow\.1\] line 13 arithmetic overflow on signed \+ in n \+ n: FAILURE$
diff --git a/regression/cbmc/pragma_cprover_enable3/test.desc b/regression/cbmc/pragma_cprover_enable3/test.desc
index e794568de05..951dc2c266d 100644
--- a/regression/cbmc/pragma_cprover_enable3/test.desc
+++ b/regression/cbmc/pragma_cprover_enable3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^main.c function main$
diff --git a/regression/cbmc/pragma_cprover_enable_all/test.desc b/regression/cbmc/pragma_cprover_enable_all/test.desc
index be5658ae717..da404977532 100644
--- a/regression/cbmc/pragma_cprover_enable_all/test.desc
+++ b/regression/cbmc/pragma_cprover_enable_all/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --object-bits 8 --bounds-check --pointer-check --pointer-primitive-check --div-by-zero-check --enum-range-check --unsigned-overflow-check --signed-overflow-check --pointer-overflow-check --float-overflow-check --conversion-check --undefined-shift-check --nan-check --pointer-primitive-check
 ^\[main\.pointer_primitives\.\d+\] line 77 pointer invalid in R_OK\(q, \(unsigned (long (long )?)?int\)1\): FAILURE$
diff --git a/regression/cbmc/pragma_cprover_enable_disable_global_off/test.desc b/regression/cbmc/pragma_cprover_enable_disable_global_off/test.desc
index c2c6ade8f9b..c9e8430a6b4 100644
--- a/regression/cbmc/pragma_cprover_enable_disable_global_off/test.desc
+++ b/regression/cbmc/pragma_cprover_enable_disable_global_off/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^main.c function main$
diff --git a/regression/cbmc/pragma_cprover_enable_disable_global_on/test.desc b/regression/cbmc/pragma_cprover_enable_disable_global_on/test.desc
index eb2eed4c87c..9e72ed21ec6 100644
--- a/regression/cbmc/pragma_cprover_enable_disable_global_on/test.desc
+++ b/regression/cbmc/pragma_cprover_enable_disable_global_on/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-primitive-check
 ^main.c function main$
diff --git a/regression/cbmc/pragma_cprover_enable_disable_multiple/test.desc b/regression/cbmc/pragma_cprover_enable_disable_multiple/test.desc
index 08129024a8d..9a39bcf1b94 100644
--- a/regression/cbmc/pragma_cprover_enable_disable_multiple/test.desc
+++ b/regression/cbmc/pragma_cprover_enable_disable_multiple/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^file main.c line \d+ function main: Found enable and disable pragmas for pointer-primitive-check
diff --git a/regression/cbmc/printf1/test.desc b/regression/cbmc/printf1/test.desc
index 367428854a5..8e0bbb83f10 100644
--- a/regression/cbmc/printf1/test.desc
+++ b/regression/cbmc/printf1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 main.c
 --trace
 ^EXIT=10$
diff --git a/regression/cbmc/ptr_arithmetic_on_null/test.desc b/regression/cbmc/ptr_arithmetic_on_null/test.desc
index b7c0190dbc5..c25f165191c 100644
--- a/regression/cbmc/ptr_arithmetic_on_null/test.desc
+++ b/regression/cbmc/ptr_arithmetic_on_null/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 
 ^\[main.assertion.1\] line .* assertion \(\(char \*\)NULL\) != \(char \*\)\(void \*\)0 \+ (\(.*\))?1: SUCCESS$
diff --git a/regression/cbmc/ptr_arithmetic_on_null/type_conflict.desc b/regression/cbmc/ptr_arithmetic_on_null/type_conflict.desc
index 0f5cbf5fcea..c7a44b02a42 100644
--- a/regression/cbmc/ptr_arithmetic_on_null/type_conflict.desc
+++ b/regression/cbmc/ptr_arithmetic_on_null/type_conflict.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 -DMISSING_CAST
 pointer subtraction over different types
diff --git a/regression/cbmc/r_w_ok1/test.desc b/regression/cbmc/r_w_ok1/test.desc
index 325c6fbf73a..6a461a6a137 100644
--- a/regression/cbmc/r_w_ok1/test.desc
+++ b/regression/cbmc/r_w_ok1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 __CPROVER_[rw]_ok\(arbitrary_size, n \+ 1\): FAILURE$
diff --git a/regression/cbmc/r_w_ok10/test.desc b/regression/cbmc/r_w_ok10/test.desc
index 000e3e962ca..54479c1b6d3 100644
--- a/regression/cbmc/r_w_ok10/test.desc
+++ b/regression/cbmc/r_w_ok10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-primitive-check
 ^EXIT=10$
diff --git a/regression/cbmc/r_w_ok2/test.desc b/regression/cbmc/r_w_ok2/test.desc
index 22961959ca9..278f468e130 100644
--- a/regression/cbmc/r_w_ok2/test.desc
+++ b/regression/cbmc/r_w_ok2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/r_w_ok4/test.desc b/regression/cbmc/r_w_ok4/test.desc
index 22961959ca9..278f468e130 100644
--- a/regression/cbmc/r_w_ok4/test.desc
+++ b/regression/cbmc/r_w_ok4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/r_w_ok5/test.desc b/regression/cbmc/r_w_ok5/test.desc
index 21f3ffc9142..a39b6d1bf4b 100644
--- a/regression/cbmc/r_w_ok5/test.desc
+++ b/regression/cbmc/r_w_ok5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 \[main.assertion.1\] .*: SUCCESS
diff --git a/regression/cbmc/r_w_ok6/test.desc b/regression/cbmc/r_w_ok6/test.desc
index 78ce9c8e76e..4ec12d76677 100644
--- a/regression/cbmc/r_w_ok6/test.desc
+++ b/regression/cbmc/r_w_ok6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 \[main.assertion.1\] .*: SUCCESS
diff --git a/regression/cbmc/r_w_ok7/test.desc b/regression/cbmc/r_w_ok7/test.desc
index b3f90047725..a5d7e85c7dc 100644
--- a/regression/cbmc/r_w_ok7/test.desc
+++ b/regression/cbmc/r_w_ok7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 \[main.assertion.1\] .*: SUCCESS
diff --git a/regression/cbmc/r_w_ok8/test.desc b/regression/cbmc/r_w_ok8/test.desc
index 8ba781658d5..4102d81cb91 100644
--- a/regression/cbmc/r_w_ok8/test.desc
+++ b/regression/cbmc/r_w_ok8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 \[main.assertion.1\] .*: SUCCESS
diff --git a/regression/cbmc/r_w_ok9/simplify.desc b/regression/cbmc/r_w_ok9/simplify.desc
index 1b06cbb7098..55a118cca67 100644
--- a/regression/cbmc/r_w_ok9/simplify.desc
+++ b/regression/cbmc/r_w_ok9/simplify.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-goto-functions
 ^EXIT=0$
diff --git a/regression/cbmc/r_w_ok9/test.desc b/regression/cbmc/r_w_ok9/test.desc
index 47c17aad3f3..c626baf6332 100644
--- a/regression/cbmc/r_w_ok9/test.desc
+++ b/regression/cbmc/r_w_ok9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 VERIFICATION SUCCESSFUL
diff --git a/regression/cbmc/reachability-slice-interproc/test.desc b/regression/cbmc/reachability-slice-interproc/test.desc
index e44781801d1..c04ff07afc4 100644
--- a/regression/cbmc/reachability-slice-interproc/test.desc
+++ b/regression/cbmc/reachability-slice-interproc/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --reachability-slice-fb --show-goto-functions
 ^EXIT=0$
diff --git a/regression/cbmc/reachability-slice-interproc2/test.desc b/regression/cbmc/reachability-slice-interproc2/test.desc
index d566401f934..b10acfc02b3 100644
--- a/regression/cbmc/reachability-slice-interproc2/test.desc
+++ b/regression/cbmc/reachability-slice-interproc2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --reachability-slice --show-goto-functions
 ^EXIT=0$
diff --git a/regression/cbmc/reachability-slice-interproc3/test.desc b/regression/cbmc/reachability-slice-interproc3/test.desc
index 58dfd98f172..ccf9d04e679 100644
--- a/regression/cbmc/reachability-slice-interproc3/test.desc
+++ b/regression/cbmc/reachability-slice-interproc3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --reachability-slice-fb --show-goto-functions
 ^EXIT=0$
diff --git a/regression/cbmc/reachability-slice/test.desc b/regression/cbmc/reachability-slice/test.desc
index 29c589ccbee..a8976affbe4 100644
--- a/regression/cbmc/reachability-slice/test.desc
+++ b/regression/cbmc/reachability-slice/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --reachability-slice --show-goto-functions --cover location --property foo.coverage.2
 ^EXIT=0$
diff --git a/regression/cbmc/reachability-slice/test2.desc b/regression/cbmc/reachability-slice/test2.desc
index b61223c79d2..c20147249da 100644
--- a/regression/cbmc/reachability-slice/test2.desc
+++ b/regression/cbmc/reachability-slice/test2.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --reachability-slice-fb --show-goto-functions --cover location --property foo.coverage.2
 ^EXIT=0$
diff --git a/regression/cbmc/reachability-slice/test3.desc b/regression/cbmc/reachability-slice/test3.desc
index c56f2a473f4..49191de1d92 100644
--- a/regression/cbmc/reachability-slice/test3.desc
+++ b/regression/cbmc/reachability-slice/test3.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --reachability-slice --show-goto-functions --cover location
 ^EXIT=0$
diff --git a/regression/cbmc/realloc-should-not-free-on-failure-to-allocate/test.desc b/regression/cbmc/realloc-should-not-free-on-failure-to-allocate/test.desc
index e47d8a997b3..a5bf8ec70eb 100644
--- a/regression/cbmc/realloc-should-not-free-on-failure-to-allocate/test.desc
+++ b/regression/cbmc/realloc-should-not-free-on-failure-to-allocate/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --malloc-may-fail --malloc-fail-null
 ^\[main.precondition_instance.\d+] line \d+ double free: SUCCESS$
diff --git a/regression/cbmc/residual-guards-1/test.desc b/regression/cbmc/residual-guards-1/test.desc
index bd5d4122edb..2edbd291637 100644
--- a/regression/cbmc/residual-guards-1/test.desc
+++ b/regression/cbmc/residual-guards-1/test.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc --unwind 10
 ^\{1\} main::argc!0@1#1 = 1$
diff --git a/regression/cbmc/residual-guards-1/test_execution.desc b/regression/cbmc/residual-guards-1/test_execution.desc
index 06e9033f4ee..e73e7239f23 100644
--- a/regression/cbmc/residual-guards-1/test_execution.desc
+++ b/regression/cbmc/residual-guards-1/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --unwind 10
 ^\[main\.assertion\.[0-9]+\] line [0-9]+ assertion argc == 1: FAILURE$
diff --git a/regression/cbmc/residual-guards-2/test.desc b/regression/cbmc/residual-guards-2/test.desc
index 25b792cd968..0c2247e36d0 100644
--- a/regression/cbmc/residual-guards-2/test.desc
+++ b/regression/cbmc/residual-guards-2/test.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc --unwind 10
 ^\{1\} main::argc!0@1#1 = 1$
diff --git a/regression/cbmc/residual-guards-2/test_execution.desc b/regression/cbmc/residual-guards-2/test_execution.desc
index 06e9033f4ee..e73e7239f23 100644
--- a/regression/cbmc/residual-guards-2/test_execution.desc
+++ b/regression/cbmc/residual-guards-2/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --unwind 10
 ^\[main\.assertion\.[0-9]+\] line [0-9]+ assertion argc == 1: FAILURE$
diff --git a/regression/cbmc/residual-guards-3/test.desc b/regression/cbmc/residual-guards-3/test.desc
index fe51f9dbf1c..21c34f474b0 100644
--- a/regression/cbmc/residual-guards-3/test.desc
+++ b/regression/cbmc/residual-guards-3/test.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc --depth 1000
 ^\{1\} main::argc!0@1#1 = 1$
diff --git a/regression/cbmc/residual-guards-3/test_execution.desc b/regression/cbmc/residual-guards-3/test_execution.desc
index 98e216323af..d196319c904 100644
--- a/regression/cbmc/residual-guards-3/test_execution.desc
+++ b/regression/cbmc/residual-guards-3/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --depth 1000
 ^\[main\.assertion\.[0-9]+\] line [0-9]+ assertion argc == 1: FAILURE$
diff --git a/regression/cbmc/residual-guards-4/test.desc b/regression/cbmc/residual-guards-4/test.desc
index 397f542ae5d..7a51b34f874 100644
--- a/regression/cbmc/residual-guards-4/test.desc
+++ b/regression/cbmc/residual-guards-4/test.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc
 ^\{1\} main::argc!0@1#1 = 1$
diff --git a/regression/cbmc/residual-guards-4/test_execution.desc b/regression/cbmc/residual-guards-4/test_execution.desc
index b288521e470..1ab6c2e23da 100644
--- a/regression/cbmc/residual-guards-4/test_execution.desc
+++ b/regression/cbmc/residual-guards-4/test_execution.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^\[main\.assertion\.[0-9]+\] line [0-9]+ assertion argc == 1: FAILURE$
diff --git a/regression/cbmc/return1/test.desc b/regression/cbmc/return1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/return1/test.desc
+++ b/regression/cbmc/return1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/return2/test.desc b/regression/cbmc/return2/test.desc
index 1801a57c61d..b655b34a10f 100644
--- a/regression/cbmc/return2/test.desc
+++ b/regression/cbmc/return2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/return3/full-slice.desc b/regression/cbmc/return3/full-slice.desc
index fef2038f244..3793f7374e1 100644
--- a/regression/cbmc/return3/full-slice.desc
+++ b/regression/cbmc/return3/full-slice.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --full-slice
 ^EXIT=0$
diff --git a/regression/cbmc/return3/test.desc b/regression/cbmc/return3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/return3/test.desc
+++ b/regression/cbmc/return3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/return4/test.desc b/regression/cbmc/return4/test.desc
index 57d411774da..9c0aae91767 100644
--- a/regression/cbmc/return4/test.desc
+++ b/regression/cbmc/return4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --unwind 2
 ^EXIT=0$
diff --git a/regression/cbmc/return5/test.desc b/regression/cbmc/return5/test.desc
index 8753f301575..7c84befca17 100644
--- a/regression/cbmc/return5/test.desc
+++ b/regression/cbmc/return5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
  --unwind 2
 ^EXIT=10$
diff --git a/regression/cbmc/return6/test.desc b/regression/cbmc/return6/test.desc
index d2175a98e32..bf09360fa4c 100644
--- a/regression/cbmc/return6/test.desc
+++ b/regression/cbmc/return6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 f_def.c
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/return7/test.desc b/regression/cbmc/return7/test.desc
index 88fdd20c5c7..1d3f29ded69 100644
--- a/regression/cbmc/return7/test.desc
+++ b/regression/cbmc/return7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/return8/test.desc b/regression/cbmc/return8/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/return8/test.desc
+++ b/regression/cbmc/return8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/return9/test.desc b/regression/cbmc/return9/test.desc
index a252bdd17d7..25ff2f70a34 100644
--- a/regression/cbmc/return9/test.desc
+++ b/regression/cbmc/return9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 tcas_v23_523.c
 --bounds-check
 ^EXIT=10$
diff --git a/regression/cbmc/runtime-profiling/test.desc b/regression/cbmc/runtime-profiling/test.desc
index ed871184560..a7d3a1198a1 100644
--- a/regression/cbmc/runtime-profiling/test.desc
+++ b/regression/cbmc/runtime-profiling/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/sat-solver-error/test.desc b/regression/cbmc/sat-solver-error/test.desc
index 4b262e9e3b4..8f3cdddef74 100644
--- a/regression/cbmc/sat-solver-error/test.desc
+++ b/regression/cbmc/sat-solver-error/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend broken-cprover-smt-backend paths-lifo-expected-failure
+CORE broken-z3-smt-backend broken-cprover-smt-backend paths-lifo-expected-failure no-new-smt
 test.c
 --sat-solver non-existing-solver
 ^EXIT=1$
diff --git a/regression/cbmc/sat-solver-warning/test.desc b/regression/cbmc/sat-solver-warning/test.desc
index fdae1889d84..856594a9e03 100644
--- a/regression/cbmc/sat-solver-warning/test.desc
+++ b/regression/cbmc/sat-solver-warning/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend broken-cprover-smt-backend 
+CORE broken-z3-smt-backend broken-cprover-smt-backend no-new-smt
 test.c
 --sat-solver lingeling
 ^EXIT=0$
diff --git a/regression/cbmc/sat-solver/test.desc b/regression/cbmc/sat-solver/test.desc
index ec0d32f5b36..78e0e506126 100644
--- a/regression/cbmc/sat-solver/test.desc
+++ b/regression/cbmc/sat-solver/test.desc
@@ -1,4 +1,4 @@
-CORE broken-z3-smt-backend broken-cprover-smt-backend 
+CORE broken-z3-smt-backend broken-cprover-smt-backend no-new-smt
 test.c
 --sat-solver cadical
 ^EXIT=10$
diff --git a/regression/cbmc/saturating_arithmetric/output-formula.desc b/regression/cbmc/saturating_arithmetric/output-formula.desc
index 41a99e2a0d2..11d26aada17 100644
--- a/regression/cbmc/saturating_arithmetric/output-formula.desc
+++ b/regression/cbmc/saturating_arithmetric/output-formula.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --program-only
 ASSERT\(__CPROVER_saturating_minus\(.*\)
diff --git a/regression/cbmc/saturating_arithmetric/output-goto.desc b/regression/cbmc/saturating_arithmetric/output-goto.desc
index 6808b36fe88..fc144ed0a24 100644
--- a/regression/cbmc/saturating_arithmetric/output-goto.desc
+++ b/regression/cbmc/saturating_arithmetric/output-goto.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-goto-functions
 ASSERT saturating-\(.*\)
diff --git a/regression/cbmc/saturating_arithmetric/test.desc b/regression/cbmc/saturating_arithmetric/test.desc
index 9efefbc7362..1c039664a91 100644
--- a/regression/cbmc/saturating_arithmetric/test.desc
+++ b/regression/cbmc/saturating_arithmetric/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/saturating_arithmetric/typeconflict.desc b/regression/cbmc/saturating_arithmetric/typeconflict.desc
index 5a78973bce6..9b00049f109 100644
--- a/regression/cbmc/saturating_arithmetric/typeconflict.desc
+++ b/regression/cbmc/saturating_arithmetric/typeconflict.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 typeconflict.c
 file typeconflict.c line 3 function main: error: __CPROVER_saturating_minus takes exactly two arguments, but 1 were provided
 ^EXIT=6$
diff --git a/regression/cbmc/scanf1/big-endian.desc b/regression/cbmc/scanf1/big-endian.desc
index d8e4b26034c..6528bb49ec8 100644
--- a/regression/cbmc/scanf1/big-endian.desc
+++ b/regression/cbmc/scanf1/big-endian.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.i
 --big-endian
 ^EXIT=10$
diff --git a/regression/cbmc/scanf1/test.desc b/regression/cbmc/scanf1/test.desc
index 346519020ae..1f30ec816fe 100644
--- a/regression/cbmc/scanf1/test.desc
+++ b/regression/cbmc/scanf1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.i
 --little-endian
 ^EXIT=10$
diff --git a/regression/cbmc/self_loops_to_assumptions1/default.desc b/regression/cbmc/self_loops_to_assumptions1/default.desc
index e616b8295e7..5cec41df787 100644
--- a/regression/cbmc/self_loops_to_assumptions1/default.desc
+++ b/regression/cbmc/self_loops_to_assumptions1/default.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 1 --unwinding-assertions
 ^replacing self-loop at file main.c line 3 function main by assume\(FALSE\)$
diff --git a/regression/cbmc/self_loops_to_assumptions1/no-assume.desc b/regression/cbmc/self_loops_to_assumptions1/no-assume.desc
index 10a258c84bc..b75ec34a1bc 100644
--- a/regression/cbmc/self_loops_to_assumptions1/no-assume.desc
+++ b/regression/cbmc/self_loops_to_assumptions1/no-assume.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 1 --unwinding-assertions --no-self-loops-to-assumptions
 ^EXIT=10$
diff --git a/regression/cbmc/set-property-inline1/test.desc b/regression/cbmc/set-property-inline1/test.desc
index 501f959f369..de76ddc5e98 100644
--- a/regression/cbmc/set-property-inline1/test.desc
+++ b/regression/cbmc/set-property-inline1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --property inc.overflow.1 --property inc.overflow.2 --slice-formula --signed-overflow-check --conversion-check
 ^EXIT=10$
diff --git a/regression/cbmc/short_circuit_implies/false_implies_failure_side_effect.desc b/regression/cbmc/short_circuit_implies/false_implies_failure_side_effect.desc
index 31a695307d1..ab4313d22ad 100644
--- a/regression/cbmc/short_circuit_implies/false_implies_failure_side_effect.desc
+++ b/regression/cbmc/short_circuit_implies/false_implies_failure_side_effect.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 false_implies_failure_side_effect.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/short_circuit_implies/short-circuit-memory-checks.desc b/regression/cbmc/short_circuit_implies/short-circuit-memory-checks.desc
index 8c4dab2fd2f..1b37eefb313 100644
--- a/regression/cbmc/short_circuit_implies/short-circuit-memory-checks.desc
+++ b/regression/cbmc/short_circuit_implies/short-circuit-memory-checks.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 short-circuit-memory-checks.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/short_circuit_implies/true_implies_failure_side_effect.desc b/regression/cbmc/short_circuit_implies/true_implies_failure_side_effect.desc
index 157aa113746..e53d14615e4 100644
--- a/regression/cbmc/short_circuit_implies/true_implies_failure_side_effect.desc
+++ b/regression/cbmc/short_circuit_implies/true_implies_failure_side_effect.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 true_implies_failure_side_effect.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/show-vcc/main_prec.desc b/regression/cbmc/show-vcc/main_prec.desc
index 9b746504b77..0a97f5ac109 100644
--- a/regression/cbmc/show-vcc/main_prec.desc
+++ b/regression/cbmc/show-vcc/main_prec.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main_prec.c
 --show-vcc
 ^EXIT=0$
diff --git a/regression/cbmc/show-vcc/test.desc b/regression/cbmc/show-vcc/test.desc
index 1582778b7ae..bb01b2fa853 100644
--- a/regression/cbmc/show-vcc/test.desc
+++ b/regression/cbmc/show-vcc/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-vcc
 ^EXIT=0$
diff --git a/regression/cbmc/show_properties1/test.desc b/regression/cbmc/show_properties1/test.desc
index 0876cac2923..96b4816a1fb 100644
--- a/regression/cbmc/show_properties1/test.desc
+++ b/regression/cbmc/show_properties1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --show-properties
 ^EXIT=0$
diff --git a/regression/cbmc/simplify-array-size/test.desc b/regression/cbmc/simplify-array-size/test.desc
index 9a12d1c23c9..8430287a97a 100644
--- a/regression/cbmc/simplify-array-size/test.desc
+++ b/regression/cbmc/simplify-array-size/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --malloc-may-fail --malloc-fail-null
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/simplify-full-test/test.desc b/regression/cbmc/simplify-full-test/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/simplify-full-test/test.desc
+++ b/regression/cbmc/simplify-full-test/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/simplify-function-call-array-element-pointer/test.desc b/regression/cbmc/simplify-function-call-array-element-pointer/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/simplify-function-call-array-element-pointer/test.desc
+++ b/regression/cbmc/simplify-function-call-array-element-pointer/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/simplify-function-call-array-pointer/test.desc b/regression/cbmc/simplify-function-call-array-pointer/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/simplify-function-call-array-pointer/test.desc
+++ b/regression/cbmc/simplify-function-call-array-pointer/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/simplify-function-call-pointer-access/test.desc b/regression/cbmc/simplify-function-call-pointer-access/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/simplify-function-call-pointer-access/test.desc
+++ b/regression/cbmc/simplify-function-call-pointer-access/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/simplify-global-array-access/test.desc b/regression/cbmc/simplify-global-array-access/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/simplify-global-array-access/test.desc
+++ b/regression/cbmc/simplify-global-array-access/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/simplify-local-array-access/test.desc b/regression/cbmc/simplify-local-array-access/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/simplify-local-array-access/test.desc
+++ b/regression/cbmc/simplify-local-array-access/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/simplify-pointer-access/test.desc b/regression/cbmc/simplify-pointer-access/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/simplify-pointer-access/test.desc
+++ b/regression/cbmc/simplify-pointer-access/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/simplify-union/test.desc b/regression/cbmc/simplify-union/test.desc
index b34ddf1241d..de8c67be832 100644
--- a/regression/cbmc/simplify-union/test.desc
+++ b/regression/cbmc/simplify-union/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^Generated 1 VCC\(s\), 0 remaining after simplification$
diff --git a/regression/cbmc/simplify_singleton_interval_7690/negative_test.desc b/regression/cbmc/simplify_singleton_interval_7690/negative_test.desc
index 141ab73c26d..5127d529276 100644
--- a/regression/cbmc/simplify_singleton_interval_7690/negative_test.desc
+++ b/regression/cbmc/simplify_singleton_interval_7690/negative_test.desc
@@ -1,4 +1,4 @@
-CORE 
+CORE no-new-smt
 --trace
 singleton_interval_simp_neg.c
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/simplify_singleton_interval_7690/positive_test.desc b/regression/cbmc/simplify_singleton_interval_7690/positive_test.desc
index 4977415b9fc..bec510e1349 100644
--- a/regression/cbmc/simplify_singleton_interval_7690/positive_test.desc
+++ b/regression/cbmc/simplify_singleton_interval_7690/positive_test.desc
@@ -1,4 +1,4 @@
-CORE 
+CORE no-new-smt
 --trace
 singleton_interval_simp.c
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/simplify_singleton_interval_7690/test_smt2.desc b/regression/cbmc/simplify_singleton_interval_7690/test_smt2.desc
index 2563cfc11bc..c7b20b1fa7a 100644
--- a/regression/cbmc/simplify_singleton_interval_7690/test_smt2.desc
+++ b/regression/cbmc/simplify_singleton_interval_7690/test_smt2.desc
@@ -1,4 +1,4 @@
-CORE smt-backend new-smt-backend
+CORE smt-backend
 singleton_interval_in_assume_7690.c
 --pointer-check
 ^\[stk_push\.pointer_dereference\.17] line \d+ dereference failure: pointer outside object bounds in stk-\>elems\[\(signed( long( long)?)? int\)stk-\>top\]: SUCCESS$
diff --git a/regression/cbmc/simplify_singleton_interval_7953/test.desc b/regression/cbmc/simplify_singleton_interval_7953/test.desc
index e1db0def910..ccd7028bf2b 100644
--- a/regression/cbmc/simplify_singleton_interval_7953/test.desc
+++ b/regression/cbmc/simplify_singleton_interval_7953/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/stack-trace/test.desc b/regression/cbmc/stack-trace/test.desc
index 70f6deaf734..eceab4a2d07 100644
--- a/regression/cbmc/stack-trace/test.desc
+++ b/regression/cbmc/stack-trace/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --stack-trace
 activate-multi-line-match
diff --git a/regression/cbmc/string_assignment1/test.desc b/regression/cbmc/string_assignment1/test.desc
index 9f085793f76..44427b32e3b 100644
--- a/regression/cbmc/string_assignment1/test.desc
+++ b/regression/cbmc/string_assignment1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/struct1/test.desc b/regression/cbmc/struct1/test.desc
index 4de445f0439..83b8819429a 100644
--- a/regression/cbmc/struct1/test.desc
+++ b/regression/cbmc/struct1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/struct10/test.desc b/regression/cbmc/struct10/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/struct10/test.desc
+++ b/regression/cbmc/struct10/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/struct11/test.desc b/regression/cbmc/struct11/test.desc
index 667664c6acf..8a897dcc15e 100644
--- a/regression/cbmc/struct11/test.desc
+++ b/regression/cbmc/struct11/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/struct12/test.desc b/regression/cbmc/struct12/test.desc
index 41402fa5070..d678193e09e 100644
--- a/regression/cbmc/struct12/test.desc
+++ b/regression/cbmc/struct12/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/struct13/test.desc b/regression/cbmc/struct13/test.desc
index 5d3b63b4691..42120d278a5 100644
--- a/regression/cbmc/struct13/test.desc
+++ b/regression/cbmc/struct13/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/struct14/test.desc b/regression/cbmc/struct14/test.desc
index e9858d2ce80..b69d909607e 100644
--- a/regression/cbmc/struct14/test.desc
+++ b/regression/cbmc/struct14/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/struct15/test.desc b/regression/cbmc/struct15/test.desc
index b624eba8b29..81a142d267f 100644
--- a/regression/cbmc/struct15/test.desc
+++ b/regression/cbmc/struct15/test.desc
@@ -1,4 +1,4 @@
-CORE smt-backend new-smt-backend
+CORE smt-backend
 main.c
 --trace --z3
 ^EXIT=0$
diff --git a/regression/cbmc/struct16/test.desc b/regression/cbmc/struct16/test.desc
index 9927cd18857..81959d03b05 100644
--- a/regression/cbmc/struct16/test.desc
+++ b/regression/cbmc/struct16/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/struct17/test.desc b/regression/cbmc/struct17/test.desc
index 624edd88c09..659a36aac28 100644
--- a/regression/cbmc/struct17/test.desc
+++ b/regression/cbmc/struct17/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/struct3/test.desc b/regression/cbmc/struct3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/struct3/test.desc
+++ b/regression/cbmc/struct3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/struct4/test.desc b/regression/cbmc/struct4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/struct4/test.desc
+++ b/regression/cbmc/struct4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/struct6/test.desc b/regression/cbmc/struct6/test.desc
index 6e36fa13566..da239c1965b 100644
--- a/regression/cbmc/struct6/test.desc
+++ b/regression/cbmc/struct6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --bounds-check --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/struct7/test.desc b/regression/cbmc/struct7/test.desc
index 5821c3e2820..96c9b4bcd7b 100644
--- a/regression/cbmc/struct7/test.desc
+++ b/regression/cbmc/struct7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --bounds-check
 ^EXIT=0$
diff --git a/regression/cbmc/struct8/test.desc b/regression/cbmc/struct8/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/struct8/test.desc
+++ b/regression/cbmc/struct8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/struct9/test.desc b/regression/cbmc/struct9/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/struct9/test.desc
+++ b/regression/cbmc/struct9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/switch1/test.desc b/regression/cbmc/switch1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/switch1/test.desc
+++ b/regression/cbmc/switch1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/switch2/test.desc b/regression/cbmc/switch2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/switch2/test.desc
+++ b/regression/cbmc/switch2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/switch3/test.desc b/regression/cbmc/switch3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/switch3/test.desc
+++ b/regression/cbmc/switch3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/switch4/test.desc b/regression/cbmc/switch4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/switch4/test.desc
+++ b/regression/cbmc/switch4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/switch5/test.desc b/regression/cbmc/switch5/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/switch5/test.desc
+++ b/regression/cbmc/switch5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/switch6/test.desc b/regression/cbmc/switch6/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/switch6/test.desc
+++ b/regression/cbmc/switch6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/switch7/test.desc b/regression/cbmc/switch7/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/switch7/test.desc
+++ b/regression/cbmc/switch7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/switch8/program-only.desc b/regression/cbmc/switch8/program-only.desc
index 03bf14bf3e3..15885c2d7e5 100644
--- a/regression/cbmc/switch8/program-only.desc
+++ b/regression/cbmc/switch8/program-only.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --program-only
 ^EXIT=0$
diff --git a/regression/cbmc/switch8/test.desc b/regression/cbmc/switch8/test.desc
index 5b7760a38df..62e8b9730ae 100644
--- a/regression/cbmc/switch8/test.desc
+++ b/regression/cbmc/switch8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/switch9/test.desc b/regression/cbmc/switch9/test.desc
index 2aa63fe318d..8438cf07aac 100644
--- a/regression/cbmc/switch9/test.desc
+++ b/regression/cbmc/switch9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --pointer-check --malloc-may-fail --malloc-fail-null
 activate-multi-line-match
diff --git a/regression/cbmc/symex_should_evaluate_simple_pointer_conditions/test.desc b/regression/cbmc/symex_should_evaluate_simple_pointer_conditions/test.desc
index d8f0a0e31c7..6711345bfd4 100644
--- a/regression/cbmc/symex_should_evaluate_simple_pointer_conditions/test.desc
+++ b/regression/cbmc/symex_should_evaluate_simple_pointer_conditions/test.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure
+CORE paths-lifo-expected-failure no-new-smt
 test.c
 --function test --show-vcc
 ^EXIT=0$
diff --git a/regression/cbmc/symex_should_exclude_null_pointers/nondet.desc b/regression/cbmc/symex_should_exclude_null_pointers/nondet.desc
index e62d8efa884..8a9209bf15f 100644
--- a/regression/cbmc/symex_should_exclude_null_pointers/nondet.desc
+++ b/regression/cbmc/symex_should_exclude_null_pointers/nondet.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 nondet.c
 
 ^VERIFICATION SUCCESSFUL$
diff --git a/regression/cbmc/symex_should_exclude_null_pointers/test.desc b/regression/cbmc/symex_should_exclude_null_pointers/test.desc
index 493843ebfb7..5ec44d8a987 100644
--- a/regression/cbmc/symex_should_exclude_null_pointers/test.desc
+++ b/regression/cbmc/symex_should_exclude_null_pointers/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --show-vcc
 ^EXIT=0$
diff --git a/regression/cbmc/symex_should_filter_value_sets/test.desc b/regression/cbmc/symex_should_filter_value_sets/test.desc
index 84401510cc7..f5d949cf414 100644
--- a/regression/cbmc/symex_should_filter_value_sets/test.desc
+++ b/regression/cbmc/symex_should_filter_value_sets/test.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure
+CORE paths-lifo-expected-failure no-new-smt
 main.c
 --show-vcc
 ^EXIT=0$
diff --git a/regression/cbmc/sync_X_and_fetch-1/pointer.desc b/regression/cbmc/sync_X_and_fetch-1/pointer.desc
index 111eb593a8d..47e35dd8f38 100644
--- a/regression/cbmc/sync_X_and_fetch-1/pointer.desc
+++ b/regression/cbmc/sync_X_and_fetch-1/pointer.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 pointer.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/sync_X_and_fetch-1/test.desc b/regression/cbmc/sync_X_and_fetch-1/test.desc
index 6032b0b3c6a..27a28993ba5 100644
--- a/regression/cbmc/sync_X_and_fetch-1/test.desc
+++ b/regression/cbmc/sync_X_and_fetch-1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/sync_X_and_fetch-1/two.desc b/regression/cbmc/sync_X_and_fetch-1/two.desc
index 8f2f1ecae22..f30efdf57b3 100644
--- a/regression/cbmc/sync_X_and_fetch-1/two.desc
+++ b/regression/cbmc/sync_X_and_fetch-1/two.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 two.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/sync_bool_compare-1/pointer.desc b/regression/cbmc/sync_bool_compare-1/pointer.desc
index 13e4c643dd0..2711f883b23 100644
--- a/regression/cbmc/sync_bool_compare-1/pointer.desc
+++ b/regression/cbmc/sync_bool_compare-1/pointer.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 pointer.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/sync_bool_compare-1/test.desc b/regression/cbmc/sync_bool_compare-1/test.desc
index 6032b0b3c6a..27a28993ba5 100644
--- a/regression/cbmc/sync_bool_compare-1/test.desc
+++ b/regression/cbmc/sync_bool_compare-1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/sync_bool_compare-1/three.desc b/regression/cbmc/sync_bool_compare-1/three.desc
index 609dba47d70..a6fdead1415 100644
--- a/regression/cbmc/sync_bool_compare-1/three.desc
+++ b/regression/cbmc/sync_bool_compare-1/three.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 three.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/sync_fetch_and_X-1/pointer.desc b/regression/cbmc/sync_fetch_and_X-1/pointer.desc
index 111eb593a8d..47e35dd8f38 100644
--- a/regression/cbmc/sync_fetch_and_X-1/pointer.desc
+++ b/regression/cbmc/sync_fetch_and_X-1/pointer.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 pointer.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/sync_fetch_and_X-1/test.desc b/regression/cbmc/sync_fetch_and_X-1/test.desc
index 6032b0b3c6a..27a28993ba5 100644
--- a/regression/cbmc/sync_fetch_and_X-1/test.desc
+++ b/regression/cbmc/sync_fetch_and_X-1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/sync_fetch_and_X-1/two.desc b/regression/cbmc/sync_fetch_and_X-1/two.desc
index 8f2f1ecae22..f30efdf57b3 100644
--- a/regression/cbmc/sync_fetch_and_X-1/two.desc
+++ b/regression/cbmc/sync_fetch_and_X-1/two.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 two.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/sync_lock_release-1/symbol_per_type.desc b/regression/cbmc/sync_lock_release-1/symbol_per_type.desc
index 90da66a65f3..358d0a47eeb 100644
--- a/regression/cbmc/sync_lock_release-1/symbol_per_type.desc
+++ b/regression/cbmc/sync_lock_release-1/symbol_per_type.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-goto-functions
 ^EXIT=0$
diff --git a/regression/cbmc/sync_lock_release-1/test.desc b/regression/cbmc/sync_lock_release-1/test.desc
index de2901b284e..c985459baff 100644
--- a/regression/cbmc/sync_lock_release-1/test.desc
+++ b/regression/cbmc/sync_lock_release-1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/sync_val_compare-1/pointer.desc b/regression/cbmc/sync_val_compare-1/pointer.desc
index 9c10fef964c..98114eb2101 100644
--- a/regression/cbmc/sync_val_compare-1/pointer.desc
+++ b/regression/cbmc/sync_val_compare-1/pointer.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 pointer.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/sync_val_compare-1/test.desc b/regression/cbmc/sync_val_compare-1/test.desc
index 6032b0b3c6a..27a28993ba5 100644
--- a/regression/cbmc/sync_val_compare-1/test.desc
+++ b/regression/cbmc/sync_val_compare-1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only new-smt-backend
+CORE gcc-only
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/sync_val_compare-1/three.desc b/regression/cbmc/sync_val_compare-1/three.desc
index 609dba47d70..a6fdead1415 100644
--- a/regression/cbmc/sync_val_compare-1/three.desc
+++ b/regression/cbmc/sync_val_compare-1/three.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 three.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/trace-strings/test.desc b/regression/cbmc/trace-strings/test.desc
index 59766b4c193..1abee971520 100644
--- a/regression/cbmc/trace-strings/test.desc
+++ b/regression/cbmc/trace-strings/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --trace
 ^EXIT=10$
diff --git a/regression/cbmc/trace-values/trace-values.desc b/regression/cbmc/trace-values/trace-values.desc
index 151db461f96..f604ae6dd5f 100644
--- a/regression/cbmc/trace-values/trace-values.desc
+++ b/regression/cbmc/trace-values/trace-values.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 trace-values.c
 --trace
 ^EXIT=10$
diff --git a/regression/cbmc/trace-values/unbounded_array.desc b/regression/cbmc/trace-values/unbounded_array.desc
index 3fd8d3b3c16..1d30f864e5e 100644
--- a/regression/cbmc/trace-values/unbounded_array.desc
+++ b/regression/cbmc/trace-values/unbounded_array.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 unbounded_array.c
 --trace
 \{ \[0u?l?l?\]=1, \[1u?l?l?\]=2, \[\d+u?l?l?\]=42 \}
diff --git a/regression/cbmc/trace_address_arithmetic1/test.desc b/regression/cbmc/trace_address_arithmetic1/test.desc
index e66bc70c19f..1f934bfacaa 100644
--- a/regression/cbmc/trace_address_arithmetic1/test.desc
+++ b/regression/cbmc/trace_address_arithmetic1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --trace
 ^EXIT=10$
diff --git a/regression/cbmc/trace_options_json_extended/extended.desc b/regression/cbmc/trace_options_json_extended/extended.desc
index b36daf7cad3..beafa0649de 100644
--- a/regression/cbmc/trace_options_json_extended/extended.desc
+++ b/regression/cbmc/trace_options_json_extended/extended.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --trace --json-ui --trace-json-extended
 ^EXIT=10$
diff --git a/regression/cbmc/trace_options_json_extended/non-extended.desc b/regression/cbmc/trace_options_json_extended/non-extended.desc
index 1821b9f454c..5d03ca97bc1 100644
--- a/regression/cbmc/trace_options_json_extended/non-extended.desc
+++ b/regression/cbmc/trace_options_json_extended/non-extended.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 --trace --json-ui
 ^EXIT=10$
diff --git a/regression/cbmc/trace_show_code/test.desc b/regression/cbmc/trace_show_code/test.desc
index 962278e6598..b5f6f3bd0f4 100644
--- a/regression/cbmc/trace_show_code/test.desc
+++ b/regression/cbmc/trace_show_code/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --trace --trace-show-code
 ^EXIT=10$
diff --git a/regression/cbmc/ts18661_typedefs/test.desc b/regression/cbmc/ts18661_typedefs/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/ts18661_typedefs/test.desc
+++ b/regression/cbmc/ts18661_typedefs/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/typedef-anon-struct1/test.desc b/regression/cbmc/typedef-anon-struct1/test.desc
index 306e7e8557e..4129f0344f1 100644
--- a/regression/cbmc/typedef-anon-struct1/test.desc
+++ b/regression/cbmc/typedef-anon-struct1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-anon-struct2/test.desc b/regression/cbmc/typedef-anon-struct2/test.desc
index 8cd4357382a..86e220fafcd 100644
--- a/regression/cbmc/typedef-anon-struct2/test.desc
+++ b/regression/cbmc/typedef-anon-struct2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-anon-union1/test.desc b/regression/cbmc/typedef-anon-union1/test.desc
index c3c177c5907..190b89262bb 100644
--- a/regression/cbmc/typedef-anon-union1/test.desc
+++ b/regression/cbmc/typedef-anon-union1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-anon-union2/test.desc b/regression/cbmc/typedef-anon-union2/test.desc
index 3e15c5eb4ca..3d5ab817226 100644
--- a/regression/cbmc/typedef-anon-union2/test.desc
+++ b/regression/cbmc/typedef-anon-union2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-const-struct1/test.desc b/regression/cbmc/typedef-const-struct1/test.desc
index d426b8a5ee8..4ed2abc2821 100644
--- a/regression/cbmc/typedef-const-struct1/test.desc
+++ b/regression/cbmc/typedef-const-struct1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-const-type1/test.desc b/regression/cbmc/typedef-const-type1/test.desc
index 8a323995246..9dfc4035aaa 100644
--- a/regression/cbmc/typedef-const-type1/test.desc
+++ b/regression/cbmc/typedef-const-type1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-const-union1/test.desc b/regression/cbmc/typedef-const-union1/test.desc
index f777829bf69..96b3a3107e4 100644
--- a/regression/cbmc/typedef-const-union1/test.desc
+++ b/regression/cbmc/typedef-const-union1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-param-anon-struct1/test.desc b/regression/cbmc/typedef-param-anon-struct1/test.desc
index d6a87fb0c25..aff1030eac9 100644
--- a/regression/cbmc/typedef-param-anon-struct1/test.desc
+++ b/regression/cbmc/typedef-param-anon-struct1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-param-anon-union1/test.desc b/regression/cbmc/typedef-param-anon-union1/test.desc
index e3b7be24f1f..be6ef9f8db3 100644
--- a/regression/cbmc/typedef-param-anon-union1/test.desc
+++ b/regression/cbmc/typedef-param-anon-union1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-param-struct1/test.desc b/regression/cbmc/typedef-param-struct1/test.desc
index c6ef91ec53f..763e2311b54 100644
--- a/regression/cbmc/typedef-param-struct1/test.desc
+++ b/regression/cbmc/typedef-param-struct1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-param-type1/test.desc b/regression/cbmc/typedef-param-type1/test.desc
index af3a1dcb6ad..af9864cde3a 100644
--- a/regression/cbmc/typedef-param-type1/test.desc
+++ b/regression/cbmc/typedef-param-type1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-param-type2/test.desc b/regression/cbmc/typedef-param-type2/test.desc
index 3e3d2f6d27e..f6f46e30ec8 100644
--- a/regression/cbmc/typedef-param-type2/test.desc
+++ b/regression/cbmc/typedef-param-type2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-param-type3/test.desc b/regression/cbmc/typedef-param-type3/test.desc
index 1baba2e69ca..9713651869a 100644
--- a/regression/cbmc/typedef-param-type3/test.desc
+++ b/regression/cbmc/typedef-param-type3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-param-union1/test.desc b/regression/cbmc/typedef-param-union1/test.desc
index 411b26e9f85..b97bca4db0c 100644
--- a/regression/cbmc/typedef-param-union1/test.desc
+++ b/regression/cbmc/typedef-param-union1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-return-anon-struct1/test.desc b/regression/cbmc/typedef-return-anon-struct1/test.desc
index fdbdcafbd96..0e8de52b8f8 100644
--- a/regression/cbmc/typedef-return-anon-struct1/test.desc
+++ b/regression/cbmc/typedef-return-anon-struct1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-return-anon-union1/test.desc b/regression/cbmc/typedef-return-anon-union1/test.desc
index 605ccf4c642..77dd2762f75 100644
--- a/regression/cbmc/typedef-return-anon-union1/test.desc
+++ b/regression/cbmc/typedef-return-anon-union1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-return-struct1/test.desc b/regression/cbmc/typedef-return-struct1/test.desc
index 69fa995c166..cd95cc65f04 100644
--- a/regression/cbmc/typedef-return-struct1/test.desc
+++ b/regression/cbmc/typedef-return-struct1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-return-type1/test.desc b/regression/cbmc/typedef-return-type1/test.desc
index b0255d2893d..dfeef7b64cc 100644
--- a/regression/cbmc/typedef-return-type1/test.desc
+++ b/regression/cbmc/typedef-return-type1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-return-type2/test.desc b/regression/cbmc/typedef-return-type2/test.desc
index 26f598b14c3..cd39fb5092f 100644
--- a/regression/cbmc/typedef-return-type2/test.desc
+++ b/regression/cbmc/typedef-return-type2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-return-type3/test.desc b/regression/cbmc/typedef-return-type3/test.desc
index 212ca68f88d..5f6b1a14eb7 100644
--- a/regression/cbmc/typedef-return-type3/test.desc
+++ b/regression/cbmc/typedef-return-type3/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-return-union1/test.desc b/regression/cbmc/typedef-return-union1/test.desc
index 6328655996d..9dc23de8099 100644
--- a/regression/cbmc/typedef-return-union1/test.desc
+++ b/regression/cbmc/typedef-return-union1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-struct1/test.desc b/regression/cbmc/typedef-struct1/test.desc
index ae67568c86f..a2782102e8f 100644
--- a/regression/cbmc/typedef-struct1/test.desc
+++ b/regression/cbmc/typedef-struct1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-struct2/test.desc b/regression/cbmc/typedef-struct2/test.desc
index ae67568c86f..a2782102e8f 100644
--- a/regression/cbmc/typedef-struct2/test.desc
+++ b/regression/cbmc/typedef-struct2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-type1/test.desc b/regression/cbmc/typedef-type1/test.desc
index de9d2d0cc7c..96795704d3b 100644
--- a/regression/cbmc/typedef-type1/test.desc
+++ b/regression/cbmc/typedef-type1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-type2/test.desc b/regression/cbmc/typedef-type2/test.desc
index 5cb220ee80e..c1dd8aa6755 100644
--- a/regression/cbmc/typedef-type2/test.desc
+++ b/regression/cbmc/typedef-type2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-type3/test.desc b/regression/cbmc/typedef-type3/test.desc
index 92f6cf637bb..330e4d4ca1a 100644
--- a/regression/cbmc/typedef-type3/test.desc
+++ b/regression/cbmc/typedef-type3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-type4/test.desc b/regression/cbmc/typedef-type4/test.desc
index 66522a6ec9f..a958f3923a6 100644
--- a/regression/cbmc/typedef-type4/test.desc
+++ b/regression/cbmc/typedef-type4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-union1/test.desc b/regression/cbmc/typedef-union1/test.desc
index f4e64f14254..6c392e390d6 100644
--- a/regression/cbmc/typedef-union1/test.desc
+++ b/regression/cbmc/typedef-union1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/typedef-union2/test.desc b/regression/cbmc/typedef-union2/test.desc
index a21267cc609..99fe01a98ea 100644
--- a/regression/cbmc/typedef-union2/test.desc
+++ b/regression/cbmc/typedef-union2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-symbol-table --function fun
 // Enable multi-line checking
diff --git a/regression/cbmc/uncaught_exceptions_analysis1/test.desc b/regression/cbmc/uncaught_exceptions_analysis1/test.desc
index 962782268ea..f8823e7d524 100644
--- a/regression/cbmc/uncaught_exceptions_analysis1/test.desc
+++ b/regression/cbmc/uncaught_exceptions_analysis1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/uniform_array1/test.desc b/regression/cbmc/uniform_array1/test.desc
index 6c8aae65d3e..1b1641fd47a 100644
--- a/regression/cbmc/uniform_array1/test.desc
+++ b/regression/cbmc/uniform_array1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/uninterpreted_function/uf1.desc b/regression/cbmc/uninterpreted_function/uf1.desc
index 879865e93e3..e03ec44fa2f 100644
--- a/regression/cbmc/uninterpreted_function/uf1.desc
+++ b/regression/cbmc/uninterpreted_function/uf1.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 uf1.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/uninterpreted_function/uf2.desc b/regression/cbmc/uninterpreted_function/uf2.desc
index b0daa371dd8..f86b1257f94 100644
--- a/regression/cbmc/uninterpreted_function/uf2.desc
+++ b/regression/cbmc/uninterpreted_function/uf2.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 uf2.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union-unequal-element-size1/test.desc b/regression/cbmc/union-unequal-element-size1/test.desc
index efd46cf414f..3a5b2662dc3 100644
--- a/regression/cbmc/union-unequal-element-size1/test.desc
+++ b/regression/cbmc/union-unequal-element-size1/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --verbosity 10
 ^EXIT=0$
diff --git a/regression/cbmc/union/union_initialization.desc b/regression/cbmc/union/union_initialization.desc
index b46931f9641..5af304b2b94 100644
--- a/regression/cbmc/union/union_initialization.desc
+++ b/regression/cbmc/union/union_initialization.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 union_initialization.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/union/union_large_array.desc b/regression/cbmc/union/union_large_array.desc
index 6bab7dc7a74..7dd292448b7 100644
--- a/regression/cbmc/union/union_large_array.desc
+++ b/regression/cbmc/union/union_large_array.desc
@@ -1,4 +1,4 @@
-CORE thorough-smt-backend
+CORE thorough-smt-backend no-new-smt
 union_large_array.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/union/union_member.desc b/regression/cbmc/union/union_member.desc
index 711663b03b1..9a20a725cd4 100644
--- a/regression/cbmc/union/union_member.desc
+++ b/regression/cbmc/union/union_member.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 union_member.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/union/union_update.desc b/regression/cbmc/union/union_update.desc
index 53d3ec8b5ff..710dcdce82e 100644
--- a/regression/cbmc/union/union_update.desc
+++ b/regression/cbmc/union/union_update.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 union_update.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/union1/test.desc b/regression/cbmc/union1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/union1/test.desc
+++ b/regression/cbmc/union1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union10/union_list2.desc b/regression/cbmc/union10/union_list2.desc
index 8eae1f6d03d..613581a5fc8 100644
--- a/regression/cbmc/union10/union_list2.desc
+++ b/regression/cbmc/union10/union_list2.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 union_list2.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union11/union_list.desc b/regression/cbmc/union11/union_list.desc
index 63d06c7e08a..e4d3a427794 100644
--- a/regression/cbmc/union11/union_list.desc
+++ b/regression/cbmc/union11/union_list.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 union_list.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union12/test.desc b/regression/cbmc/union12/test.desc
index 171e794113a..31796f2ff81 100644
--- a/regression/cbmc/union12/test.desc
+++ b/regression/cbmc/union12/test.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/union13/no-arch.desc b/regression/cbmc/union13/no-arch.desc
index a0167414ba7..b43b43ef367 100644
--- a/regression/cbmc/union13/no-arch.desc
+++ b/regression/cbmc/union13/no-arch.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --arch none --little-endian
 (Starting CEGAR Loop|^Generated 1 VCC\(s\), 1 remaining after simplification$)
diff --git a/regression/cbmc/union13/test.desc b/regression/cbmc/union13/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/union13/test.desc
+++ b/regression/cbmc/union13/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union14/test.desc b/regression/cbmc/union14/test.desc
index aa0df5cd3a4..6dd0e558212 100644
--- a/regression/cbmc/union14/test.desc
+++ b/regression/cbmc/union14/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union15/test.desc b/regression/cbmc/union15/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/union15/test.desc
+++ b/regression/cbmc/union15/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union16/test.desc b/regression/cbmc/union16/test.desc
index 93817bbfa45..1b0b90e1916 100644
--- a/regression/cbmc/union16/test.desc
+++ b/regression/cbmc/union16/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union17/test.desc b/regression/cbmc/union17/test.desc
index cb26454d27c..f3599e3b335 100644
--- a/regression/cbmc/union17/test.desc
+++ b/regression/cbmc/union17/test.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 main.c
 --no-simplify
 ^EXIT=0$
diff --git a/regression/cbmc/union18/test.desc b/regression/cbmc/union18/test.desc
index 8f68181436f..e61cb7256ba 100644
--- a/regression/cbmc/union18/test.desc
+++ b/regression/cbmc/union18/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^Generated 1 VCC\(s\), 0 remaining after simplification$
diff --git a/regression/cbmc/union2/test.desc b/regression/cbmc/union2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/union2/test.desc
+++ b/regression/cbmc/union2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union3/test.desc b/regression/cbmc/union3/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/union3/test.desc
+++ b/regression/cbmc/union3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union4/test.desc b/regression/cbmc/union4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/union4/test.desc
+++ b/regression/cbmc/union4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union5/test.desc b/regression/cbmc/union5/test.desc
index 82568cfc082..33900ad2b78 100644
--- a/regression/cbmc/union5/test.desc
+++ b/regression/cbmc/union5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/union6/test.desc b/regression/cbmc/union6/test.desc
index 949a5302cbf..0a5f3bc705f 100644
--- a/regression/cbmc/union6/test.desc
+++ b/regression/cbmc/union6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --little-endian
 ^EXIT=0$
diff --git a/regression/cbmc/union7/test.desc b/regression/cbmc/union7/test.desc
index 11d69ea0681..6450a89940a 100644
--- a/regression/cbmc/union7/test.desc
+++ b/regression/cbmc/union7/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --big-endian
 ^EXIT=0$
diff --git a/regression/cbmc/union8/test.desc b/regression/cbmc/union8/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/union8/test.desc
+++ b/regression/cbmc/union8/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/union9/test.desc b/regression/cbmc/union9/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/union9/test.desc
+++ b/regression/cbmc/union9/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/unknown-argument-suggestion/test.desc b/regression/cbmc/unknown-argument-suggestion/test.desc
index d9341e021b1..bf1204f5842 100644
--- a/regression/cbmc/unknown-argument-suggestion/test.desc
+++ b/regression/cbmc/unknown-argument-suggestion/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 dummy.c
 --traec
 did you mean --trace
diff --git a/regression/cbmc/unreachable-goto1/test-vccs.desc b/regression/cbmc/unreachable-goto1/test-vccs.desc
index 7abdda07dab..9091c97751a 100644
--- a/regression/cbmc/unreachable-goto1/test-vccs.desc
+++ b/regression/cbmc/unreachable-goto1/test-vccs.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc
 ^Generated 1 VCC\(s\), 1 remaining after simplification$
diff --git a/regression/cbmc/unreachable-goto1/test.desc b/regression/cbmc/unreachable-goto1/test.desc
index 3e9d22b2a2f..d9ac83f95d4 100644
--- a/regression/cbmc/unreachable-goto1/test.desc
+++ b/regression/cbmc/unreachable-goto1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/unreachable-goto2/test-vccs.desc b/regression/cbmc/unreachable-goto2/test-vccs.desc
index 36740a80afb..d18e596fd5f 100644
--- a/regression/cbmc/unreachable-goto2/test-vccs.desc
+++ b/regression/cbmc/unreachable-goto2/test-vccs.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc
 ^Generated 1 VCC\(s\), 1 remaining after simplification$
diff --git a/regression/cbmc/unreachable-goto2/test.desc b/regression/cbmc/unreachable-goto2/test.desc
index 1d7e3e4313f..330528f4237 100644
--- a/regression/cbmc/unreachable-goto2/test.desc
+++ b/regression/cbmc/unreachable-goto2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/unreachable-goto3/test-vccs.desc b/regression/cbmc/unreachable-goto3/test-vccs.desc
index c95deabe9a8..54f5a88444d 100644
--- a/regression/cbmc/unreachable-goto3/test-vccs.desc
+++ b/regression/cbmc/unreachable-goto3/test-vccs.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc
 ^Generated 1 VCC\(s\), 1 remaining after simplification$
diff --git a/regression/cbmc/unreachable-goto3/test.desc b/regression/cbmc/unreachable-goto3/test.desc
index 4f00aa41e70..ee2169c0cb5 100644
--- a/regression/cbmc/unreachable-goto3/test.desc
+++ b/regression/cbmc/unreachable-goto3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/unreachable-goto4/test-vccs.desc b/regression/cbmc/unreachable-goto4/test-vccs.desc
index 8e7d45cddd8..434b0b05cd0 100644
--- a/regression/cbmc/unreachable-goto4/test-vccs.desc
+++ b/regression/cbmc/unreachable-goto4/test-vccs.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc
 ^Generated 1 VCC\(s\), 1 remaining after simplification$
diff --git a/regression/cbmc/unreachable-goto4/test.desc b/regression/cbmc/unreachable-goto4/test.desc
index 4f00aa41e70..ee2169c0cb5 100644
--- a/regression/cbmc/unreachable-goto4/test.desc
+++ b/regression/cbmc/unreachable-goto4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/unreachable-goto5/test-vccs.desc b/regression/cbmc/unreachable-goto5/test-vccs.desc
index ad6b25958b9..dc7ef0de936 100644
--- a/regression/cbmc/unreachable-goto5/test-vccs.desc
+++ b/regression/cbmc/unreachable-goto5/test-vccs.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc
 ^Generated 1 VCC\(s\), 1 remaining after simplification$
diff --git a/regression/cbmc/unreachable-goto5/test.desc b/regression/cbmc/unreachable-goto5/test.desc
index d494e422509..aca472865e0 100644
--- a/regression/cbmc/unreachable-goto5/test.desc
+++ b/regression/cbmc/unreachable-goto5/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/unreachable-goto6/test-vccs.desc b/regression/cbmc/unreachable-goto6/test-vccs.desc
index f687a87af7f..dcfb2c2a5e3 100644
--- a/regression/cbmc/unreachable-goto6/test-vccs.desc
+++ b/regression/cbmc/unreachable-goto6/test-vccs.desc
@@ -1,4 +1,4 @@
-CORE paths-lifo-expected-failure new-smt-backend
+CORE paths-lifo-expected-failure
 test.c
 --show-vcc
 ^Generated 1 VCC\(s\), 1 remaining after simplification$
diff --git a/regression/cbmc/unreachable-goto6/test.desc b/regression/cbmc/unreachable-goto6/test.desc
index fe7c85aece9..ead69482cbb 100644
--- a/regression/cbmc/unreachable-goto6/test.desc
+++ b/regression/cbmc/unreachable-goto6/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 test.c
 
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/unsigned1/test.desc b/regression/cbmc/unsigned1/test.desc
index 08a06bb8651..a1e381cbf60 100644
--- a/regression/cbmc/unsigned1/test.desc
+++ b/regression/cbmc/unsigned1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --show-goto-functions
 ^EXIT=0$
diff --git a/regression/cbmc/unsigned___int128/test.desc b/regression/cbmc/unsigned___int128/test.desc
index ab1d61e16c9..67b0294bc90 100644
--- a/regression/cbmc/unsigned___int128/test.desc
+++ b/regression/cbmc/unsigned___int128/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unsigned-overflow-check --signed-overflow-check --function reduce
 ^EXIT=0$
diff --git a/regression/cbmc/unsigned_char1/test.desc b/regression/cbmc/unsigned_char1/test.desc
index 26850765a77..0f995fec257 100644
--- a/regression/cbmc/unsigned_char1/test.desc
+++ b/regression/cbmc/unsigned_char1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unsigned-char
 ^EXIT=0$
diff --git a/regression/cbmc/unwind_counters1/test.desc b/regression/cbmc/unwind_counters1/test.desc
index ca28d22716b..46efb30683e 100644
--- a/regression/cbmc/unwind_counters1/test.desc
+++ b/regression/cbmc/unwind_counters1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 11 --unwinding-assertions
 ^EXIT=0$
diff --git a/regression/cbmc/unwind_counters2/test.desc b/regression/cbmc/unwind_counters2/test.desc
index 9202d246798..70b64ab793d 100644
--- a/regression/cbmc/unwind_counters2/test.desc
+++ b/regression/cbmc/unwind_counters2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 3 --unwinding-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/unwind_counters3/test.desc b/regression/cbmc/unwind_counters3/test.desc
index 9202d246798..70b64ab793d 100644
--- a/regression/cbmc/unwind_counters3/test.desc
+++ b/regression/cbmc/unwind_counters3/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 3 --unwinding-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/unwind_counters4/test.desc b/regression/cbmc/unwind_counters4/test.desc
index 6d425aa2dbe..f60b11caa10 100644
--- a/regression/cbmc/unwind_counters4/test.desc
+++ b/regression/cbmc/unwind_counters4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 2
 ^EXIT=10$
diff --git a/regression/cbmc/unwinding_assertions1/test.desc b/regression/cbmc/unwinding_assertions1/test.desc
index fb604d6187b..33d9d83a074 100644
--- a/regression/cbmc/unwinding_assertions1/test.desc
+++ b/regression/cbmc/unwinding_assertions1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwind 3 --unwinding-assertions
 ^EXIT=10$
diff --git a/regression/cbmc/unwindset1/label.desc b/regression/cbmc/unwindset1/label.desc
index c97aae6bf54..6515b21f9a7 100644
--- a/regression/cbmc/unwindset1/label.desc
+++ b/regression/cbmc/unwindset1/label.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwindset main.for_loop:2,main.1:6
 ^VERIFICATION FAILED$
diff --git a/regression/cbmc/unwindset1/test.desc b/regression/cbmc/unwindset1/test.desc
index 6f6048ff145..b96eb4cdcc5 100644
--- a/regression/cbmc/unwindset1/test.desc
+++ b/regression/cbmc/unwindset1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwindset main.0:2,main.2:2
 ^loop identifier main.2 provided with unwindset does not match any loop$
diff --git a/regression/cbmc/unwindset2/test.desc b/regression/cbmc/unwindset2/test.desc
index 375bb3b4de3..e870637450c 100644
--- a/regression/cbmc/unwindset2/test.desc
+++ b/regression/cbmc/unwindset2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --unwindset main.for_loop:2 --unwinding-assertions
 ^loop identifier main.for_loop provided with unwindset is ambiguous$
diff --git a/regression/cbmc/va_list1/test.desc b/regression/cbmc/va_list1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/va_list1/test.desc
+++ b/regression/cbmc/va_list1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/va_list2/test.desc b/regression/cbmc/va_list2/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/va_list2/test.desc
+++ b/regression/cbmc/va_list2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/va_list3/test.desc b/regression/cbmc/va_list3/test.desc
index 8daee1cee55..8c0e86b7f4b 100644
--- a/regression/cbmc/va_list3/test.desc
+++ b/regression/cbmc/va_list3/test.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/va_list3/windows-preprocessed.desc b/regression/cbmc/va_list3/windows-preprocessed.desc
index 9049dd0fdfa..1eb8a1bf769 100644
--- a/regression/cbmc/va_list3/windows-preprocessed.desc
+++ b/regression/cbmc/va_list3/windows-preprocessed.desc
@@ -1,4 +1,4 @@
-CORE broken-smt-backend
+CORE broken-smt-backend no-new-smt
 windows-preprocessed.i
 --winx64
 ^EXIT=0$
diff --git a/regression/cbmc/va_list4/test.desc b/regression/cbmc/va_list4/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/va_list4/test.desc
+++ b/regression/cbmc/va_list4/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/variable-access-to-constant-array/test.desc b/regression/cbmc/variable-access-to-constant-array/test.desc
index 98870d013c2..212fd7b6674 100644
--- a/regression/cbmc/variable-access-to-constant-array/test.desc
+++ b/regression/cbmc/variable-access-to-constant-array/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/verifier_assume_one/test.desc b/regression/cbmc/verifier_assume_one/test.desc
index 9f1aa2be3b0..bca33a5dd6d 100644
--- a/regression/cbmc/verifier_assume_one/test.desc
+++ b/regression/cbmc/verifier_assume_one/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=6$
diff --git a/regression/cbmc/verifier_error_lhs/test.desc b/regression/cbmc/verifier_error_lhs/test.desc
index 92104b36f3e..694fa96c475 100644
--- a/regression/cbmc/verifier_error_lhs/test.desc
+++ b/regression/cbmc/verifier_error_lhs/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 function .* is not declared
diff --git a/regression/cbmc/verifier_error_zero/test.desc b/regression/cbmc/verifier_error_zero/test.desc
index d6e02f70ba8..f6beb5f5ef4 100644
--- a/regression/cbmc/verifier_error_zero/test.desc
+++ b/regression/cbmc/verifier_error_zero/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 function .* is not declared
diff --git a/regression/cbmc/vla1/program-only.desc b/regression/cbmc/vla1/program-only.desc
index 7c0b75016f3..35f671bf4a5 100644
--- a/regression/cbmc/vla1/program-only.desc
+++ b/regression/cbmc/vla1/program-only.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --program-only
 ^EXIT=0$
diff --git a/regression/cbmc/vla1/test.desc b/regression/cbmc/vla1/test.desc
index f35d0f8db14..decadc51459 100644
--- a/regression/cbmc/vla1/test.desc
+++ b/regression/cbmc/vla1/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/void_ifthenelse/test.desc b/regression/cbmc/void_ifthenelse/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/void_ifthenelse/test.desc
+++ b/regression/cbmc/void_ifthenelse/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/void_pointer1/test.desc b/regression/cbmc/void_pointer1/test.desc
index d5e386bad9a..0cd5686c3d2 100644
--- a/regression/cbmc/void_pointer1/test.desc
+++ b/regression/cbmc/void_pointer1/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/void_pointer2/test.desc b/regression/cbmc/void_pointer2/test.desc
index 6daabc695da..2292d801ebd 100644
--- a/regression/cbmc/void_pointer2/test.desc
+++ b/regression/cbmc/void_pointer2/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 --pointer-check --no-simplify --unwind 3
 ^EXIT=0$
diff --git a/regression/cbmc/void_pointer3/test.desc b/regression/cbmc/void_pointer3/test.desc
index 83b8819429a..4c60cea5a03 100644
--- a/regression/cbmc/void_pointer3/test.desc
+++ b/regression/cbmc/void_pointer3/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/void_pointer4/test.desc b/regression/cbmc/void_pointer4/test.desc
index 6de79559914..69ea4ed48db 100644
--- a/regression/cbmc/void_pointer4/test.desc
+++ b/regression/cbmc/void_pointer4/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/void_pointer5/test.desc b/regression/cbmc/void_pointer5/test.desc
index 5979a5cff73..0a7bda842af 100644
--- a/regression/cbmc/void_pointer5/test.desc
+++ b/regression/cbmc/void_pointer5/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/void_pointer6/test.desc b/regression/cbmc/void_pointer6/test.desc
index 503df2ca2a0..ddb660a9931 100644
--- a/regression/cbmc/void_pointer6/test.desc
+++ b/regression/cbmc/void_pointer6/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 --pointer-check
 ^EXIT=10$
diff --git a/regression/cbmc/void_pointer7/test.desc b/regression/cbmc/void_pointer7/test.desc
index 3db12932134..e0d24cfffc7 100644
--- a/regression/cbmc/void_pointer7/test.desc
+++ b/regression/cbmc/void_pointer7/test.desc
@@ -1,4 +1,4 @@
-CORE gcc-only
+CORE gcc-only no-new-smt
 main.c
 --pointer-check
 ^EXIT=0$
diff --git a/regression/cbmc/while1/test.desc b/regression/cbmc/while1/test.desc
index f4cb0fa5f29..9efefbc7362 100644
--- a/regression/cbmc/while1/test.desc
+++ b/regression/cbmc/while1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/while2/requires-transform.desc b/regression/cbmc/while2/requires-transform.desc
index cee57365fb7..8aa536c7210 100644
--- a/regression/cbmc/while2/requires-transform.desc
+++ b/regression/cbmc/while2/requires-transform.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 requires-transform.c
 
 ^EXIT=0$
diff --git a/regression/cbmc/while2/test.desc b/regression/cbmc/while2/test.desc
index d42c6416fa2..aa4d4a6f507 100644
--- a/regression/cbmc/while2/test.desc
+++ b/regression/cbmc/while2/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 
 ^EXIT=10$
diff --git a/regression/cbmc/xml-escaping/debug_output.desc b/regression/cbmc/xml-escaping/debug_output.desc
index 92f36790f10..af4f42c9fa8 100644
--- a/regression/cbmc/xml-escaping/debug_output.desc
+++ b/regression/cbmc/xml-escaping/debug_output.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 main.c
 --verbosity 10 --xml-ui
 ^EXIT=10$
diff --git a/regression/cbmc/xml-interface1/test.desc b/regression/cbmc/xml-interface1/test.desc
index 1a25e12ba3c..7f33c189af2 100644
--- a/regression/cbmc/xml-interface1/test.desc
+++ b/regression/cbmc/xml-interface1/test.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 --xml-interface
 < test.xml
 ^EXIT=10$
diff --git a/regression/cbmc/xml-interface1/test_wrong_flag.desc b/regression/cbmc/xml-interface1/test_wrong_flag.desc
index e665facbd22..25f277064c9 100644
--- a/regression/cbmc/xml-interface1/test_wrong_flag.desc
+++ b/regression/cbmc/xml-interface1/test_wrong_flag.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 --xml-interface
 < test_wrong_flag.xml
 ^EXIT=6$
diff --git a/regression/cbmc/xml-interface1/test_wrong_option.desc b/regression/cbmc/xml-interface1/test_wrong_option.desc
index 08637d3b933..77dd991ba5f 100644
--- a/regression/cbmc/xml-interface1/test_wrong_option.desc
+++ b/regression/cbmc/xml-interface1/test_wrong_option.desc
@@ -1,4 +1,4 @@
-CORE new-smt-backend
+CORE
 --xml-interface
 < test_wrong_option.xml
 ^EXIT=6$
diff --git a/regression/cbmc/xml-trace/test.desc b/regression/cbmc/xml-trace/test.desc
index 6fa9845188f..39e51a05713 100644
--- a/regression/cbmc/xml-trace/test.desc
+++ b/regression/cbmc/xml-trace/test.desc
@@ -1,4 +1,4 @@
-CORE broken-cprover-smt-backend
+CORE broken-cprover-smt-backend no-new-smt
 main.c
 --xml-ui --function test --little-endian
 activate-multi-line-match
diff --git a/regression/cbmc/xml-trace2/test.desc b/regression/cbmc/xml-trace2/test.desc
index 18273276e8f..ce9def1a804 100644
--- a/regression/cbmc/xml-trace2/test.desc
+++ b/regression/cbmc/xml-trace2/test.desc
@@ -1,4 +1,4 @@
-CORE
+CORE no-new-smt
 main.c
 --xml-ui
 <full_lhs_value( binary="[01]+")?>\{ 14, 0 \}</full_lhs_value>
diff --git a/regression/cbmc/z3/Issue5970.desc b/regression/cbmc/z3/Issue5970.desc
index 5c85d8d81d7..446272b1184 100644
--- a/regression/cbmc/z3/Issue5970.desc
+++ b/regression/cbmc/z3/Issue5970.desc
@@ -1,4 +1,4 @@
-CORE smt-backend broken-cprover-smt-backend
+CORE smt-backend broken-cprover-smt-backend no-new-smt
 Issue5970.c
 --z3
 ^EXIT=10$
diff --git a/regression/cbmc/z3/Issue5977.desc b/regression/cbmc/z3/Issue5977.desc
index e938b048f44..cebe3977d8c 100644
--- a/regression/cbmc/z3/Issue5977.desc
+++ b/regression/cbmc/z3/Issue5977.desc
@@ -1,4 +1,4 @@
-CORE smt-backend broken-cprover-smt-backend
+CORE smt-backend broken-cprover-smt-backend no-new-smt
 Issue5977.c
 --z3
 ^EXIT=(6|10)$
diff --git a/regression/cbmc/z3/invalid.desc b/regression/cbmc/z3/invalid.desc
index 90358d14954..a2f83971f8f 100644
--- a/regression/cbmc/z3/invalid.desc
+++ b/regression/cbmc/z3/invalid.desc
@@ -1,4 +1,4 @@
-CORE smt-backend new-smt-backend
+CORE smt-backend
 invalid.c
 --trace --smt2 --z3
 ^EXIT=10$
diff --git a/regression/cbmc/z3/trace-char.desc b/regression/cbmc/z3/trace-char.desc
index 3c796626a9f..2714bb674a9 100644
--- a/regression/cbmc/z3/trace-char.desc
+++ b/regression/cbmc/z3/trace-char.desc
@@ -1,4 +1,4 @@
-CORE smt-backend
+CORE smt-backend no-new-smt
 trace-char.c
 --trace --z3
 ^EXIT=10$
diff --git a/regression/cbmc/z3/trace.desc b/regression/cbmc/z3/trace.desc
index 95a257f49f9..e45ffa67ee8 100644
--- a/regression/cbmc/z3/trace.desc
+++ b/regression/cbmc/z3/trace.desc
@@ -1,4 +1,4 @@
-CORE smt-backend
+CORE smt-backend no-new-smt
 trace.c
 --trace --z3
 ^EXIT=10$
diff --git a/regression/cbmc/z3/valid.desc b/regression/cbmc/z3/valid.desc
index 5cbbb0c81c5..ca634f915aa 100644
--- a/regression/cbmc/z3/valid.desc
+++ b/regression/cbmc/z3/valid.desc
@@ -1,4 +1,4 @@
-CORE smt-backend new-smt-backend
+CORE smt-backend
 valid.c
 --trace --smt2 --z3
 ^EXIT=0$