MAYBE
0.09/0.18	MAYBE
0.09/0.19	
0.09/0.19	Problem:
0.09/0.19	 U11(tt(),N) -> activate(N)
0.09/0.19	 U21(tt(),M,N) -> s(plus(activate(N),activate(M)))
0.09/0.19	 U31(tt()) -> 0()
0.09/0.19	 U41(tt(),M,N) -> plus(x(activate(N),activate(M)),activate(N))
0.09/0.19	 and(tt(),X) -> activate(X)
0.09/0.19	 isNat(n__0()) -> tt()
0.09/0.19	 isNat(n__plus(V1,V2)) -> and(isNat(activate(V1)),n__isNat(activate(V2)))
0.09/0.19	 isNat(n__s(V1)) -> isNat(activate(V1))
0.09/0.19	 isNat(n__x(V1,V2)) -> and(isNat(activate(V1)),n__isNat(activate(V2)))
0.09/0.19	 plus(N,0()) -> U11(isNat(N),N)
0.09/0.19	 plus(N,s(M)) -> U21(and(isNat(M),n__isNat(N)),M,N)
0.09/0.19	 x(N,0()) -> U31(isNat(N))
0.09/0.19	 x(N,s(M)) -> U41(and(isNat(M),n__isNat(N)),M,N)
0.09/0.19	 0() -> n__0()
0.09/0.19	 plus(X1,X2) -> n__plus(X1,X2)
0.09/0.19	 isNat(X) -> n__isNat(X)
0.09/0.19	 s(X) -> n__s(X)
0.09/0.19	 x(X1,X2) -> n__x(X1,X2)
0.09/0.19	 activate(n__0()) -> 0()
0.09/0.19	 activate(n__plus(X1,X2)) -> plus(activate(X1),activate(X2))
0.09/0.19	 activate(n__isNat(X)) -> isNat(X)
0.09/0.19	 activate(n__s(X)) -> s(activate(X))
0.09/0.19	 activate(n__x(X1,X2)) -> x(activate(X1),activate(X2))
0.09/0.19	 activate(X) -> X
0.09/0.19	
0.09/0.19	Proof:
0.09/0.19	 Open
0.09/0.19	EOF