// verifast_options{disable_overflow_check target:ILP32}
// This file is part of the SV-Benchmarks collection of verification tasks:
// https://github.com/sosy-lab/sv-benchmarks
//
// SPDX-FileCopyrightText: 2019 Dirk Beyer and Matthias Dangl
//
// SPDX-License-Identifier: Apache-2.0

extern void abort(void);
//@ requires true;
//@ ensures true;
void reach_error()
//@ requires false;
//@ ensures true;
{}extern int __VERIFIER_nondet_int();
//@ requires true;
//@ ensures true;
void __VERIFIER_assert(int cond) 
//@ requires (cond != 0);
//@ ensures (cond != 0);
{  if (!(cond)) {
    ERROR: {reach_error();abort();}
  }
  return;
}
int main(void) 
//@ requires module(even__verifast_instrumented, true);
//@ ensures junk();
{
    //@ open_module(); 
  unsigned int x = 0;
while (__VERIFIER_nondet_int())
//@ invariant ((x % 2) == 0);
    {
    x += 2;
  }
  __VERIFIER_assert(!(x % 2));
  return 0;
}