MAYBE 0.08/0.18 MAYBE 0.08/0.18 0.08/0.18 Problem: 0.08/0.18 active(f(a(),b(),X)) -> mark(f(X,X,X)) 0.08/0.18 active(c()) -> mark(a()) 0.08/0.18 active(c()) -> mark(b()) 0.08/0.18 active(f(X1,X2,X3)) -> f(active(X1),X2,X3) 0.08/0.18 active(f(X1,X2,X3)) -> f(X1,X2,active(X3)) 0.08/0.18 f(mark(X1),X2,X3) -> mark(f(X1,X2,X3)) 0.08/0.18 f(X1,X2,mark(X3)) -> mark(f(X1,X2,X3)) 0.08/0.18 proper(f(X1,X2,X3)) -> f(proper(X1),proper(X2),proper(X3)) 0.08/0.18 proper(a()) -> ok(a()) 0.08/0.18 proper(b()) -> ok(b()) 0.08/0.18 proper(c()) -> ok(c()) 0.08/0.18 f(ok(X1),ok(X2),ok(X3)) -> ok(f(X1,X2,X3)) 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 0.08/0.19 EOF