Pure3Phase_false-no-overflow.c

/*
 * Date: 2014-06-29
 * Author: leike@informatik.uni-freiburg.de
 *
 * This program has the following 3-phase ranking function:
 * f_0(x, y, z) = z
 * f_1(x, y, z) = y
 * f_2(x, y, z) = x
 *
 * The program does not have a nested ranking function.
 */

typedef enum {false, true} bool;

extern int __VERIFIER_nondet_int(void);

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