// 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 (cond != 0);
//@ ensures (cond != 0);
{ if(!(cond)) { ERROR: {reach_error();abort();} } }extern bool __VERIFIER_nondet_bool();
int main() 
//@ requires module(hh2012_ex2b__verifast_instrumented, true) &*& true;
//@ ensures false &*& junk();
{
    //@ open_module(); 
  int n = 0;
while (1)
//@ invariant (n < 61);
    {
    __VERIFIER_assert(n <= 60);
if (__VERIFIER_nondet_bool()) 
//@ requires true;
//@ ensures true;
{      if (n < 60) {
        n++;
      }
      else {
        __VERIFIER_assert(n == 60);
        n = 0;
      }
    }
  }
  return 0;
}