extern int __VERIFIER_nondet_int(void);

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