MAYBE
351.84/88.82	MAYBE
351.84/88.82	
351.84/88.82	Problem:
351.84/88.82	 active(nats()) -> mark(adx(zeros()))
351.84/88.82	 active(zeros()) -> mark(cons(0(),zeros()))
351.84/88.82	 active(incr(cons(X,Y))) -> mark(cons(s(X),incr(Y)))
351.84/88.82	 active(adx(cons(X,Y))) -> mark(incr(cons(X,adx(Y))))
351.84/88.82	 active(hd(cons(X,Y))) -> mark(X)
351.84/88.82	 active(tl(cons(X,Y))) -> mark(Y)
351.84/88.82	 mark(nats()) -> active(nats())
351.84/88.82	 mark(adx(X)) -> active(adx(mark(X)))
351.84/88.82	 mark(zeros()) -> active(zeros())
351.84/88.82	 mark(cons(X1,X2)) -> active(cons(X1,X2))
351.84/88.82	 mark(0()) -> active(0())
351.84/88.82	 mark(incr(X)) -> active(incr(mark(X)))
351.84/88.82	 mark(s(X)) -> active(s(X))
351.84/88.82	 mark(hd(X)) -> active(hd(mark(X)))
351.84/88.82	 mark(tl(X)) -> active(tl(mark(X)))
351.84/88.82	 adx(mark(X)) -> adx(X)
351.84/88.82	 adx(active(X)) -> adx(X)
351.84/88.82	 cons(mark(X1),X2) -> cons(X1,X2)
351.84/88.82	 cons(X1,mark(X2)) -> cons(X1,X2)
351.84/88.82	 cons(active(X1),X2) -> cons(X1,X2)
351.84/88.82	 cons(X1,active(X2)) -> cons(X1,X2)
351.84/88.82	 incr(mark(X)) -> incr(X)
351.84/88.82	 incr(active(X)) -> incr(X)
351.84/88.82	 s(mark(X)) -> s(X)
351.84/88.82	 s(active(X)) -> s(X)
351.84/88.82	 hd(mark(X)) -> hd(X)
351.84/88.82	 hd(active(X)) -> hd(X)
351.84/88.82	 tl(mark(X)) -> tl(X)
351.84/88.82	 tl(active(X)) -> tl(X)
351.84/88.82	
351.84/88.82	Proof:
351.84/88.82	 Open
351.84/88.82	EOF