array-cast adress equality: add check with addresses that should compare as unequal.

Author: jerhard

tests/regression/69-addresses/02-array-cast.c

@@ -5,16 +5,22 @@ int main() {
   int a[10];
   int *b = a;
 
-  assert(a == b);
-  assert(a + 4 == b + 4);
+  __goblint_check(a == b);
+  __goblint_check(a + 4 == b + 4);
 
   char *b_char = (char*) a;
-  assert((void*) a == (void*) b_char );
+  __goblint_check((void*) a == (void*) b_char );
 
-  char* a_intoffset = a + 1;
-  char* b_intoffset =  b_char + sizeof(int);
+  char* a_intoffset =(char*) (a + 1);
+  char* b_intoffset = b_char + sizeof(int);
 
   __goblint_check(a_intoffset == b_intoffset);
   __goblint_check((char*) (a + 1) == b_char + sizeof(int));
+
+  char* a_4intoffset = (char*) (a + 4);
+
+  __goblint_check(a_4intoffset == b_intoffset); // FAIL
+  __goblint_check((char*) (a + 4) == b_char + sizeof(int)); // FAIL
+
   return 0;
 }