Add STL regression tests

Adds additional regression tests for module calls and XOR instructions.

Author: MatWise

regression/statement-list/Bool5/main.awl

@@ -0,0 +1,24 @@
+FUNCTION_BLOCK "Bool5"
+VERSION : 0.1
+   VAR_INPUT 
+      in1 : Bool;
+   END_VAR
+
+   VAR_OUTPUT 
+      out1 : Bool;
+   END_VAR
+
+
+BEGIN
+NETWORK
+TITLE =
+      CLR;
+      X #in1;
+      XN #in1;
+      = #out1;
+      CALL "__CPROVER_assert"
+      (  condition := #out1
+      );
+
+END_FUNCTION_BLOCK
+

regression/statement-list/Bool5/test.desc

@@ -0,0 +1,9 @@
+CORE
+main.awl
+--function \"Bool5\"
+^EXIT=0$
+^SIGNAL=0$
+^\*\* 0 of 1 failed \(1 iterations\)$
+^VERIFICATION SUCCESSFUL$
+--
+^warning: ignoring

regression/statement-list/Function_Call/main.awl renamed to regression/statement-list/Function_Call1/main.awl

@@ -1,4 +1,4 @@
-FUNCTION_BLOCK "Function_Call"
+FUNCTION_BLOCK "Function_Call1"
 VERSION : 0.1
    VAR_INPUT 
       In1 : Bool;

regression/statement-list/Function_Call/test.desc renamed to regression/statement-list/Function_Call1/test.desc

@@ -3,7 +3,7 @@ main.awl
 --show-parse-tree
 ^EXIT=0$
 ^SIGNAL=0$
-^Name: "Function_Call"$
+^Name: "Function_Call1"$
 ^Version: 0[.]1$
 ^statement_list_call	"__Function"$
 ^	param := In1$

regression/statement-list/Function_Call2/main.awl

@@ -0,0 +1,40 @@
+FUNCTION "Called_Function" : Void
+VERSION : 0.1
+   VAR_INPUT 
+      Input : Bool;
+   END_VAR
+
+BEGIN
+NETWORK
+TITLE = 
+
+END_FUNCTION
+
+
+FUNCTION_BLOCK "Function_Call2"
+VERSION : 0.1
+   VAR_INPUT 
+      In1 : Bool;
+   END_VAR
+
+BEGIN
+NETWORK
+TITLE = 
+      CALL "__CPROVER_assert"
+      (  condition             := TRUE
+      );
+
+      CALL "__CPROVER_assume"
+      (  condition             := #In1
+      );
+
+      CALL "__CPROVER_assert"
+      (  condition             := #In1
+      );
+
+      CALL "Called_Function"
+      (  Input                 := #In1
+      );
+
+END_FUNCTION_BLOCK
+

regression/statement-list/Function_Call2/test.desc

@@ -0,0 +1,8 @@
+CORE
+main.awl
+--function \"Function_Call2\"
+^EXIT=0$
+^SIGNAL=0$
+^VERIFICATION SUCCESSFUL$
+--
+^warning: ignoring