// verifast_options{disable_overflow_check target:ILP32}
extern void abort(void);
//@ requires true;
//@ ensures true;
void reach_error()
//@ requires false;
//@ ensures true;
{}void foo(int *p);

void plus(int *p)
//@ requires true;
//@ ensures true;
{    (*p)++;
    foo(p);
}

void foo(int *p) 
//@ requires true;
//@ ensures true;
{if(*p<20)
//@ requires true;
//@ ensures true;
{      plus(p);
  }else if(*p==20){
      return;
  }else
  {
      ERRORLABEL:{reach_error();abort();}
  }
}

int main(int argc, char const *argv[])

//@ requires module(simple_recursive__verifast_instrumented, true);
//@ ensures junk();
{
    //@ open_module(); 

  int x = 0;
  int *p = &x;
  *p = 10;
  foo(p);
 return 0; }