// 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 (0 < cond);
//@ ensures (0 < cond);
{  if (!(cond)) {
    ERROR: {reach_error();abort();}
  }
  return;
}

int main(void) 
//@ requires module(underapprox_2_2__verifast_instrumented, true);
//@ ensures junk();
{
    //@ open_module(); 
  unsigned int x = 0;
  unsigned int y = 1;

while (x < 6)
//@ invariant ((x == 6) || (x < 6));
    {
    x++;
    y *= 2;
  }

  __VERIFIER_assert(x == 6);
 return 0; }