void abort() { }; /*@ requires ((1 <= \old(cond))) && (cond != 0); ensures ((1 <= \old(cond))) && (1); @*/ void __VERIFIER_assert(int cond) { if (!(cond)) { ERROR: {/*@ assert(0); */;abort();} } return; } int main() { unsigned int x = 0; /*@ loop invariant (((x % 2) == 0)); @*/ while (x < 0x0fffffff) { x += 2; } __VERIFIER_assert(!(x % 2)); }