// 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();}
  }
  return;
}
unsigned int __VERIFIER_nondet_uint();
//@ requires true;
//@ ensures true;
int main() 
//@ requires module(sum03_2__verifast_instrumented, true) &*& true;
//@ ensures false &*& junk();
{
    //@ open_module(); 
  unsigned int sn=0;
  unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint();
  unsigned int x=0;
while(1)
//@ invariant (((x * 2) == (((x / 2147483648) * 4294967296) + sn)) && (0 <= (x / 2147483648)));
    {
    sn = sn + (2);
    x++;
    __VERIFIER_assert(sn==x*(2) || sn == 0);
  }
 return 0; }