void abort() { };
                                                                       
                                                  
                                                                             
                                                                   
                                                  
                                                                             
                                                                              
                                                                             

                        
                                                                                                                                                                    
/*@ 
    requires ((cond != 0)) && (cond != 0);
    ensures ((cond != 0)) && (1);
@*/
void __VERIFIER_assert(int cond) { if(!(cond)) { ERROR: {/*@ assert(0); */;abort();} } }
int main() {
  int i = 0;
/*@
loop invariant (((0 < i) || (i == 0)));
@*/
  while (i < 4) {
    int j = 0;
/*@
loop invariant (((((((j <= 4) && (2 <= j)) && (j == ((long long) i * 2))) || ((((((long long) i * 2) <= ((long long) j + 6)) && (j <= 4)) && (2 <= j)) && (((long long) j + 2) <= ((long long) i * 2)))) || (((j == 0) && (1 <= i)) && (i <= 3))) || ((j == 0) && (i == 0))));
@*/
    while (j < 3) {
      i++;
      j += 2;
      __VERIFIER_assert(0 <= j);
      __VERIFIER_assert(j <= 2 * i);
      __VERIFIER_assert(2 * i <= j + 6);
      __VERIFIER_assert(j <= 4);
    }
    __VERIFIER_assert(0 <= j);
    __VERIFIER_assert(j <= 2 * i);
    __VERIFIER_assert(2 * i <= j + 6);
    __VERIFIER_assert(j <= 4);
    i = i - j / 2 + 1;
  }
  return 0;
}