active f b c x mark f x x x active f x y z f x y active z active d m b f x y mark z mark f x y z active d mark c proper b ok b proper c ok c proper d ok d proper f x y z f proper x proper y proper z f ok x ok y ok z ok f x y z top mark x top proper x top ok x top active x active 1 f 3 b 0 c 0 mark 1 d 0 m 1 proper 1 ok 1 top 1 FULL ./TRS/AProVE/JFP_Ex31.trs