YES


Termination: (Ranking Functions Found)
------------
l3: < < x_0 >, < y_0 > >
l6: < < x_0 >, < -1 + y_0 > >
l4: < < x_0 >, < y_0 > >
l5: < < x_0 >, < y_0 > >
l2: < < x_0 >, < y_0 > >