// verifast_options{disable_overflow_check target:ILP32}
extern void abort(void);
//@ requires true;
//@ ensures true;
void reach_error()
//@ requires false;
//@ ensures true;
{}
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, true);
//@ ensures junk();
{
    //@ open_module(); 
  unsigned int x = 0x0ffffff0;

  while (x > 0) {
    x -= 2;
  }

  __VERIFIER_assert(!(x % 2));
 return 0; }