// 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", "underapprox_2-2.c", 3, "reach_error"); } void __VERIFIER_assert(int cond) //@ requires (0 < cond); //@ ensures (0 < cond); { if (!(cond)) { ERROR: {reach_error();abort();} } return; } int main(void) //@ requires module(underapprox_2_2__verifast_instrumented_modified, true); //@ ensures junk(); { unsigned int x = 0; unsigned int y = 1; while (x < 6)//@ invariant ((x == 6) || (x < 6)); { x++; y *= 2; } __VERIFIER_assert(x == 6); }