MAYBE
(ignored inputs)COMMENT from van Oostrom ( AJSW 2016 ) submitted by: Vincent van Oostrom
input TRS:
   [ g(f(b,?x)) -> g(h(h(f(f(h(k(k(?x,?x),?x)),h(k(k(?x,?x),?x))),h(k(k(?x,?x),?x)))))),
     f(?x,b) -> h(f(f(?x,?x),?x)),
     k(?x,?y) -> q(?x,?y,?y),
     q(?x,?y,b) -> r(?x,?y),
     r(?x,b) -> f(?x,b) ]
TRS:
   [ g(f(b,?x)) -> g(h(h(f(f(h(k(k(?x,?x),?x)),h(k(k(?x,?x),?x))),h(k(k(?x,?x),?x)))))),
     f(?x,b) -> h(f(f(?x,?x),?x)),
     k(?x,?y) -> q(?x,?y,?y),
     q(?x,?y,b) -> r(?x,?y),
     r(?x,b) -> f(?x,b) ]
unknown Right-Reducible
problems/556.trs: Failure(unknown UNC)
(4 msec.)