void abort() { };
                                                                       
                                                  
                                                                             
                                                                   
                                                  
                                                                             
                                                                              
                                                                             

                                                                                                                                                                                  
extern int __VERIFIER_nondet_int();
extern _Bool __VERIFIER_nondet_bool();
/*@ 
    requires ((\old(cond) != 0)) && (cond != 0);
    ensures ((\old(cond) != 0)) && (1);
@*/
void __VERIFIER_assert(int cond) {
  if (!cond) {
    /*@ assert(0); */;
  }
}
int main() {
  int i = __VERIFIER_nondet_int();
  int c = __VERIFIER_nondet_int();
  if (!(c==0 && i==0)) return 0;
/*@
loop invariant ((((((((1 <= c) && (i <= 2)) && (1 <= i)) || ((4 <= c) && (1 <= i))) || ((0 <= c) && (i == 0))) || (((1 <= i) && (i <= 3)) && (4 <= ((long long) i + c)))) || ((i == 1) && (0 <= c))));
@*/
  while (i<100) {
    c=c+i;
    i=i+1;
    if (i<=0) break;
  }
  __VERIFIER_assert(c>=0);
  return 0;
}