MAYBE
0.08/0.19	MAYBE
0.08/0.19	
0.08/0.19	Problem:
0.08/0.19	 U11(tt(),V2) -> U12(isNat(activate(V2)))
0.08/0.19	 U12(tt()) -> tt()
0.08/0.19	 U21(tt()) -> tt()
0.08/0.19	 U31(tt(),V2) -> U32(isNat(activate(V2)))
0.08/0.19	 U32(tt()) -> tt()
0.08/0.19	 U41(tt(),N) -> activate(N)
0.08/0.19	 U51(tt(),M,N) -> U52(isNat(activate(N)),activate(M),activate(N))
0.08/0.19	 U52(tt(),M,N) -> s(plus(activate(N),activate(M)))
0.08/0.19	 U61(tt()) -> 0()
0.08/0.19	 U71(tt(),M,N) -> U72(isNat(activate(N)),activate(M),activate(N))
0.08/0.19	 U72(tt(),M,N) -> plus(x(activate(N),activate(M)),activate(N))
0.08/0.19	 isNat(n__0()) -> tt()
0.08/0.19	 isNat(n__plus(V1,V2)) -> U11(isNat(activate(V1)),activate(V2))
0.08/0.19	 isNat(n__s(V1)) -> U21(isNat(activate(V1)))
0.08/0.19	 isNat(n__x(V1,V2)) -> U31(isNat(activate(V1)),activate(V2))
0.08/0.19	 plus(N,0()) -> U41(isNat(N),N)
0.08/0.19	 plus(N,s(M)) -> U51(isNat(M),M,N)
0.08/0.19	 x(N,0()) -> U61(isNat(N))
0.08/0.19	 x(N,s(M)) -> U71(isNat(M),M,N)
0.08/0.19	 0() -> n__0()
0.08/0.19	 plus(X1,X2) -> n__plus(X1,X2)
0.08/0.19	 s(X) -> n__s(X)
0.08/0.19	 x(X1,X2) -> n__x(X1,X2)
0.08/0.19	 activate(n__0()) -> 0()
0.08/0.19	 activate(n__plus(X1,X2)) -> plus(activate(X1),activate(X2))
0.08/0.19	 activate(n__s(X)) -> s(activate(X))
0.08/0.19	 activate(n__x(X1,X2)) -> x(activate(X1),activate(X2))
0.08/0.19	 activate(X) -> X
0.08/0.19	
0.08/0.19	Proof:
0.08/0.19	 Open
0.18/0.20	EOF