/*
 * Date: 2014-06-08
 * Author: leike@informatik.uni-freiburg.de
 *
 *
 * This is Example 2.11 from the test suit used in
 *
 * Termination Proofs for Linear Simple Loops.
 * Hong Yi Chen, Shaked Flur, and Supratik Mukhopadhyay.
 * SAS 2012.
 *
 * The test suite is available at the following URL.
 * https://tigerbytes2.lsu.edu/users/hchen11/lsl/LSL_benchmark.txt
 *
 * Comment: non-terminating (for x=9,y=7)
 */

extern int __VERIFIER_nondet_int();

int main() {
    int x = __VERIFIER_nondet_int();
    int y = __VERIFIER_nondet_int();
    while (4*x - 5*y > 0) {
        int old_x = x;
        x = 2*old_x + 4*y;
        y = 4*old_x;
    }
    return 0;
}