MAYBE
0.08/0.18	MAYBE
0.08/0.18	
0.08/0.18	Problem:
0.08/0.18	 active(f(g(X),Y)) -> mark(f(X,f(g(X),Y)))
0.08/0.18	 active(f(X1,X2)) -> f(active(X1),X2)
0.08/0.18	 active(g(X)) -> g(active(X))
0.08/0.18	 f(mark(X1),X2) -> mark(f(X1,X2))
0.08/0.18	 g(mark(X)) -> mark(g(X))
0.08/0.18	 proper(f(X1,X2)) -> f(proper(X1),proper(X2))
0.08/0.18	 proper(g(X)) -> g(proper(X))
0.08/0.18	 f(ok(X1),ok(X2)) -> ok(f(X1,X2))
0.08/0.18	 g(ok(X)) -> ok(g(X))
0.08/0.18	 top(mark(X)) -> top(proper(X))
0.08/0.18	 top(ok(X)) -> top(active(X))
0.08/0.18	
0.08/0.18	Proof:
0.08/0.18	 Open
0.08/0.18	EOF