NO
0.08/0.18	NO
0.08/0.18	
0.08/0.18	Problem:
0.08/0.18	 U12(tt()) -> s(plus(N,M))
0.08/0.18	 U22(tt()) -> plus(x(N,M),N)
0.08/0.18	 U11(tt()) -> U12(tt())
0.08/0.18	 U21(tt()) -> U22(tt())
0.08/0.18	 plus(N,0()) -> N
0.08/0.18	 plus(N,s(M)) -> U11(tt())
0.08/0.18	 x(N,0()) -> 0()
0.08/0.18	 x(N,s(M)) -> U21(tt())
0.08/0.18	
0.08/0.18	Proof:
0.08/0.18	 Fresh Variable Processor:
0.08/0.18	  loop length: 1
0.08/0.18	  terms:
0.08/0.18	   U12(tt())
0.08/0.18	  context: s(plus([],M))
0.08/0.18	  substitution:
0.08/0.18	   N -> U12(tt())
0.08/0.18	  Qed
0.08/0.18	EOF