YES


Termination: (Ranking Functions Found)
------------
eval_main_bb1_in: < < v_x.0 >, < v_y.0 > >
eval_main_bb2_in: < < v_x.0 >, < v_y.0 > >
eval_main_bb3_in: < < 0 >, < v_x.1 > >
eval_main_bb4_in: < < 0 >, < -1 + v_x.1 > >
eval_main_bb5_in: < < v_x.0 >, < 0 >, < v_y.1 > >
eval_main_bb6_in: < < v_x.0 >, < 0 >, < -1 + v_y.1 > >


method 1