YES (ignored inputs)COMMENT the following rules are removed from the original TRS - ( 0 ( ) , 0 ( ) ) -> 0 ( ) - ( s ( x ) , 0 ( ) ) -> s ( x ) Rewrite Rules: [ -(?x,s(?y)) -> -(d(?x),?y), d(s(?x)) -> ?x, -(s(?x),s(?y)) -> -(?x,?y), -(d(?x),?y) -> -(?x,s(?y)) ] Apply Direct Methods... Inner CPs: [ -(?x_1,?y_3) = -(s(?x_1),s(?y_3)) ] Outer CPs: [ -(d(s(?x_2)),?y) = -(?x_2,?y), -(d(d(?x_3)),?y) = -(?x_3,s(s(?y))) ] not Overlay, check Termination... unknown/not Terminating unknown Knuth & Bendix Linear unknown Development Closed Strongly Closed Direct Methods: CR Combined result: CR /tmp/filepHeMga.trs: Success(CR) (18 msec.)