NO
(ignored inputs)COMMENT TPDB SRS_Standard/Zantema_04/z108
input TRS:
   [ a(a(?x)) -> b(c(?x)),
     b(b(?x)) -> c(d(?x)),
     c(c(?x)) -> d(d(d(?x))),
     d(d(d(?x))) -> a(c(?x)) ]
TRS:
   [ a(a(?x)) -> b(c(?x)),
     b(b(?x)) -> c(d(?x)),
     c(c(?x)) -> d(d(d(?x))),
     d(d(d(?x))) -> a(c(?x)) ]
constructed TRS:
   [ a(a(?x)) -> b(c(?x)),
     b(b(?x)) -> c(d(?x)),
     c(c(?x)) -> d(d(d(?x))),
     d(d(d(?x))) -> a(c(?x)) ]
convertible distinct normal forms: d(d(a(c(?x)))) = a(c(d(d(?x))))
UNC Completion (Strongly Closed)
problems/943.trs: Success(not UNC)
(0 msec.)