YES


Termination: (Ranking Functions Found)
------------
n_l0___1: < < -y_0 > >
n_l0___10: < < y_0 > >
n_l0___3: < < -1 + x_0 > >
n_l0___4: < < -y_0 > >
n_l0___7: < < 1 -x_0 > >
n_l0___9: < < -x_0 > >
n_l1___11: < < y_0 > >
n_l1___13: < < -1 + x_0 > >
n_l1___15: < < -x_0 > >
n_l1___2: < < x_0 > >
n_l1___5: < < -y_0 > >
n_l1___8: < < y_0 > >
n_n_l0___3___17: < < -1 + x_0 + y_0 > >
n_n_l0___4___13: < < -1 + x_0 -y_0 > >
n_n_l0___9___9: < < -1 -x_0 -y_0 > >
n_n_l1___11___23: < < -x_0 + y_0 > >
n_n_l1___13___18: < < x_0 + y_0 > >
n_n_l1___15___10: < < -x_0 -y_0 > >
n_n_l1___5___14: < < x_0 -y_0 > >


method 1