YES


Termination: (Ranking Functions Found)
------------
l4: < < x_0 + y_0 >, < x_0 + y_0 >, < - c_0 > >
l0: < < x_0 + y_0 > >
l3: < < x_0 + y_0 >, < x_0 + y_0 >, < 0 > >
l2: < < -1 + x_0 + y_0 >, < -1 + x_0 + y_0 >, < - c_0 > >
l5: < < -1 + x_0 + y_0 >, < -1 + x_0 + y_0 >, < - c_0 > >