// verifast_options{disable_overflow_check target:ILP32} extern void abort(void);//@ requires true; //@ ensures true; extern void __assert_fail(const char *, const char *, unsigned int, const char *) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__noreturn__)); void reach_error() //@ requires false; //@ ensures true; { __assert_fail("0", "simple_4-2.c", 3, "reach_error"); } void __VERIFIER_assert(int cond) //@ requires (1 <= cond); //@ ensures (1 <= cond); { if (!(cond)) { ERROR: {reach_error();abort();} } return; } int main(void) //@ requires module(simple_4_2__verifast_instrumented_modified, true); //@ ensures junk(); { unsigned int x = 0x0ffffff0; while (x > 0)//@ invariant true; { x -= 2; } __VERIFIER_assert(!(x % 2)); }