Added another test.

Author: klaas

regression/contracts/function_check_05/main.c

@@ -0,0 +1,16 @@
+#include <assert.h>
+
+int foo(int* x) 
+__CPROVER_ensures(__CPROVER_return_value == 1)
+{
+  *x = 1;
+  return 1;
+}
+
+int main() {
+  int y = 0;  
+  int z = foo(&y);
+  assert(y == 0);
+  assert(z == 1);
+  return 0;
+}

regression/contracts/function_check_05/test.desc

@@ -0,0 +1,8 @@
+KNOWNBUG # Contract checking does not properly havoc function calls
+main.c
+--check-code-contracts
+^\[main.assertion.1\] assertion x == 0: FAILURE$
+^\[main.assertion.2\] assertion y == 1: SUCCESS$
+^\[foo.1\] : SUCCESS$
+
+^VERIFICATION SUCCESSFUL$