MAYBE
283.61/72.12	MAYBE
283.61/72.12	
283.61/72.12	Problem:
283.61/72.12	 active(and(tt(),X)) -> mark(X)
283.61/72.12	 active(plus(N,0())) -> mark(N)
283.61/72.12	 active(plus(N,s(M))) -> mark(s(plus(N,M)))
283.61/72.12	 active(and(X1,X2)) -> and(active(X1),X2)
283.61/72.12	 active(plus(X1,X2)) -> plus(active(X1),X2)
283.61/72.12	 active(plus(X1,X2)) -> plus(X1,active(X2))
283.61/72.12	 active(s(X)) -> s(active(X))
283.61/72.12	 and(mark(X1),X2) -> mark(and(X1,X2))
283.61/72.12	 plus(mark(X1),X2) -> mark(plus(X1,X2))
283.61/72.12	 plus(X1,mark(X2)) -> mark(plus(X1,X2))
283.61/72.12	 s(mark(X)) -> mark(s(X))
283.61/72.12	 proper(and(X1,X2)) -> and(proper(X1),proper(X2))
283.61/72.12	 proper(tt()) -> ok(tt())
283.61/72.12	 proper(plus(X1,X2)) -> plus(proper(X1),proper(X2))
283.61/72.12	 proper(0()) -> ok(0())
283.61/72.12	 proper(s(X)) -> s(proper(X))
283.61/72.12	 and(ok(X1),ok(X2)) -> ok(and(X1,X2))
283.61/72.12	 plus(ok(X1),ok(X2)) -> ok(plus(X1,X2))
283.61/72.12	 s(ok(X)) -> ok(s(X))
283.61/72.12	 top(mark(X)) -> top(proper(X))
283.61/72.12	 top(ok(X)) -> top(active(X))
283.61/72.12	
283.61/72.12	Proof:
283.61/72.12	 Open
283.61/72.13	EOF