/* TAGS: c sym */
/* VERIFY_OPTS: --symbolic --sequential -o nofail:malloc */
/* CC_OPTS: */

// Source: Credited to Anubhav Gupta
// appears in Ranjit Jhala, Ken McMillan: "A Practical and Complete Approach
// to Predicate Refinement", TACAS 2006
extern void __VERIFIER_error(void);
extern void __VERIFIER_assume(int);
void __VERIFIER_assert(int cond) {
  if (!(cond)) {
      ERROR: __VERIFIER_error();
  }
  return;
}
extern int __VERIFIER_nondet_int(void);

// V: small.10 CC_OPT: -DNUM=10
// V: small.100 CC_OPT: -DNUM=100 TAGS: big
// V: big.1000 CC_OPT: -DNUM=1000 TAGS: big
// V: big.10000 CC_OPT: -DNUM=10000 TAGS: big
// V: big.100000 CC_OPT: -DNUM=100000 TAGS: big

int main() {
    int i, j;
    i = __VERIFIER_nondet_int();
    j = __VERIFIER_nondet_int();
    if (!(i >= 0 && j >= 0)) return 0;
    if (i >= NUM || j >= NUM) return 0;
    int x = i;
    int y = j;
    while(x != 0) {
        x--;
        y--;
    }

    if (i == j) {
        __VERIFIER_assert(y == 0);
    }
    return 0;
}