Add a test with array of negative size

This tests that defining an array with negative size does not make JBMC crash.

Author: romainbrenguier

jbmc/regression/jbmc/array-cell-sensitivity-negative-size/Test.class

@@ -0,0 +1,11 @@
+public class Test {
+  public static void check(Integer t) {
+    if (t != null)
+      try {
+        Integer[] arr = new Integer[-7];
+        assert false;
+      } catch (NegativeArraySizeException e) {
+        assert false;
+      }
+  }
+}

jbmc/regression/jbmc/array-cell-sensitivity-negative-size/Test.java

@@ -0,0 +1,9 @@
+CORE
+Test.class
+--function Test.check
+line 5 Array size should be >= 0: FAILURE
+^EXIT=10$
+^SIGNAL=0$
+--
+--
+Test that defining an array with negative size does not crash JBMC