MAYBE (ignored inputs)COMMENT doi:10.1007/11805618_6 [7] Example 2 submitted by: Takahito Aoto , Junichi Yoshida , and Yoshihito Toyama Rewrite Rules: [ nats -> :(0,inc(nats)), inc(:(?x,?y)) -> :(s(?x),inc(?y)), hd(:(?x,?y)) -> ?x, tl(:(?x,?y)) -> ?y, inc(tl(nats)) -> tl(inc(nats)) ] Apply Direct Methods... Inner CPs: [ inc(tl(:(0,inc(nats)))) = tl(inc(nats)) ] Outer CPs: [ ] Linear (inner) Parallel CPs: (not computed) unknown Toyama (Parallel CPs) Direct Methods: Can't judge Combined result: Can't judge 20.trs: Failure(unknown CR) (0 msec.)