MAYBE
0.00/0.02	 The problem does not contain well-formed TRSs:
0.00/0.02	   Strict Trs:
0.00/0.02	     { U41(tt()) -> N
0.00/0.02	     , U52(tt()) -> s(plus(N, M))
0.00/0.02	     , plus(N, s(M)) -> U51(isNat())
0.00/0.02	     , plus(N, 0()) -> U41(isNat())
0.00/0.02	     , U72(tt()) -> plus(x(N, M), N)
0.00/0.02	     , x(N, s(M)) -> U71(isNat())
0.00/0.02	     , x(N, 0()) -> U61(isNat())
0.00/0.02	     , U11(tt()) -> U12(isNat())
0.00/0.02	     , U12(tt()) -> tt()
0.00/0.02	     , isNat() -> tt()
0.00/0.02	     , isNat() -> U11(isNat())
0.00/0.02	     , isNat() -> U21(isNat())
0.00/0.02	     , isNat() -> U31(isNat())
0.00/0.02	     , U21(tt()) -> tt()
0.00/0.02	     , U31(tt()) -> U32(isNat())
0.00/0.02	     , U32(tt()) -> tt()
0.00/0.02	     , U51(tt()) -> U52(isNat())
0.00/0.02	     , U61(tt()) -> 0()
0.00/0.02	     , U71(tt()) -> U72(isNat()) }
0.00/0.02	   StartTerms: basic terms
0.00/0.02	   Strategy: none
0.00/0.02	EOF