YES
(ignored inputs)COMMENT Cops #647 - #721: generated ground TRSs; evenly distributed in the UNR/UNC/NFP/CR hierarchy submitted by: Bertram Felgenhauer
Input:
   [ h(a,a) -> f(c),
     a -> a,
     a -> a,
     b -> h(c,a) ]

Make it flat:
   [ h(a,a) -> f(c),
     a -> a,
     a -> a,
     b -> h(c,a) ]
Time: 0.000 [s]

Make it Complete (R^):
   [ h(a,a) = f(c),
     b = h(c,a) ]
Time: 0.000 [s]

CPNF:
   [ c … c ]
Time: 0.000 [s]

Now checking all the pairs in CW...

Time to check pairs: 0.000 [s]

The TRS has Uniqueness of Normal Forms.
Total Time: 0.000 [s]

problems/691.trs: Success(UNC)
real 0.02
user 0.01
sys 0.01