extern int __VERIFIER_nondet_int(void);

int foo(int x,int y){
while (x > 0 && y > 0) {
		if (__VERIFIER_nondet_int() != 0) {
			x = x - 1;
			y = __VERIFIER_nondet_int();
		} else {
			y = y - 1;
		}
	}
return 0;
}