YES Problem: active(f(g(X),Y)) -> mark(f(X,f(g(X),Y))) active(f(X1,X2)) -> f(active(X1),X2) active(g(X)) -> g(active(X)) f(mark(X1),X2) -> mark(f(X1,X2)) g(mark(X)) -> mark(g(X)) proper(f(X1,X2)) -> f(proper(X1),proper(X2)) proper(g(X)) -> g(proper(X)) f(ok(X1),ok(X2)) -> ok(f(X1,X2)) g(ok(X)) -> ok(g(X)) top(mark(X)) -> top(proper(X)) top(ok(X)) -> top(active(X)) Proof: DP Processor: DPs: active#(f(g(X),Y)) -> f#(X,f(g(X),Y)) active#(f(X1,X2)) -> active#(X1) active#(f(X1,X2)) -> f#(active(X1),X2) active#(g(X)) -> active#(X) active#(g(X)) -> g#(active(X)) f#(mark(X1),X2) -> f#(X1,X2) g#(mark(X)) -> g#(X) proper#(f(X1,X2)) -> proper#(X2) proper#(f(X1,X2)) -> proper#(X1) proper#(f(X1,X2)) -> f#(proper(X1),proper(X2)) proper#(g(X)) -> proper#(X) proper#(g(X)) -> g#(proper(X)) f#(ok(X1),ok(X2)) -> f#(X1,X2) g#(ok(X)) -> g#(X) top#(mark(X)) -> proper#(X) top#(mark(X)) -> top#(proper(X)) top#(ok(X)) -> active#(X) top#(ok(X)) -> top#(active(X)) TRS: active(f(g(X),Y)) -> mark(f(X,f(g(X),Y))) active(f(X1,X2)) -> f(active(X1),X2) active(g(X)) -> g(active(X)) f(mark(X1),X2) -> mark(f(X1,X2)) g(mark(X)) -> mark(g(X)) proper(f(X1,X2)) -> f(proper(X1),proper(X2)) proper(g(X)) -> g(proper(X)) f(ok(X1),ok(X2)) -> ok(f(X1,X2)) g(ok(X)) -> ok(g(X)) top(mark(X)) -> top(proper(X)) top(ok(X)) -> top(active(X)) Usable Rule Processor: DPs: active#(f(g(X),Y)) -> f#(X,f(g(X),Y)) active#(f(X1,X2)) -> active#(X1) active#(f(X1,X2)) -> f#(active(X1),X2) active#(g(X)) -> active#(X) active#(g(X)) -> g#(active(X)) f#(mark(X1),X2) -> f#(X1,X2) g#(mark(X)) -> g#(X) proper#(f(X1,X2)) -> proper#(X2) proper#(f(X1,X2)) -> proper#(X1) proper#(f(X1,X2)) -> f#(proper(X1),proper(X2)) proper#(g(X)) -> proper#(X) proper#(g(X)) -> g#(proper(X)) f#(ok(X1),ok(X2)) -> f#(X1,X2) g#(ok(X)) -> g#(X) top#(mark(X)) -> proper#(X) top#(mark(X)) -> top#(proper(X)) top#(ok(X)) -> active#(X) top#(ok(X)) -> top#(active(X)) TRS: g(mark(X)) -> mark(g(X)) g(ok(X)) -> ok(g(X)) f(mark(X1),X2) -> mark(f(X1,X2)) f(ok(X1),ok(X2)) -> ok(f(X1,X2)) active(f(g(X),Y)) -> mark(f(X,f(g(X),Y))) active(f(X1,X2)) -> f(active(X1),X2) active(g(X)) -> g(active(X)) proper(f(X1,X2)) -> f(proper(X1),proper(X2)) proper(g(X)) -> g(proper(X)) Matrix Interpretation Processor: dim=1 usable rules: g(mark(X)) -> mark(g(X)) g(ok(X)) -> ok(g(X)) f(mark(X1),X2) -> mark(f(X1,X2)) f(ok(X1),ok(X2)) -> ok(f(X1,X2)) active(f(g(X),Y)) -> mark(f(X,f(g(X),Y))) active(f(X1,X2)) -> f(active(X1),X2) active(g(X)) -> g(active(X)) proper(f(X1,X2)) -> f(proper(X1),proper(X2)) proper(g(X)) -> g(proper(X)) interpretation: [top#](x0) = x0, [proper#](x0) = x0, [g#](x0) = x0 + 1, [f#](x0, x1) = x0 + x1, [active#](x0) = 2x0 + 2, [ok](x0) = 2x0 + 4, [proper](x0) = x0, [mark](x0) = x0 + 1, [active](x0) = 2x0 + 1, [f](x0, x1) = x0 + x1 + 4, [g](x0) = 4x0 + 4 orientation: active#(f(g(X),Y)) = 8X + 2Y + 18 >= 5X + Y + 8 = f#(X,f(g(X),Y)) active#(f(X1,X2)) = 2X1 + 2X2 + 10 >= 2X1 + 2 = active#(X1) active#(f(X1,X2)) = 2X1 + 2X2 + 10 >= 2X1 + X2 + 1 = f#(active(X1),X2) active#(g(X)) = 8X + 10 >= 2X + 2 = active#(X) active#(g(X)) = 8X + 10 >= 2X + 2 = g#(active(X)) f#(mark(X1),X2) = X1 + X2 + 1 >= X1 + X2 = f#(X1,X2) g#(mark(X)) = X + 2 >= X + 1 = g#(X) proper#(f(X1,X2)) = X1 + X2 + 4 >= X2 = proper#(X2) proper#(f(X1,X2)) = X1 + X2 + 4 >= X1 = proper#(X1) proper#(f(X1,X2)) = X1 + X2 + 4 >= X1 + X2 = f#(proper(X1),proper(X2)) proper#(g(X)) = 4X + 4 >= X = proper#(X) proper#(g(X)) = 4X + 4 >= X + 1 = g#(proper(X)) f#(ok(X1),ok(X2)) = 2X1 + 2X2 + 8 >= X1 + X2 = f#(X1,X2) g#(ok(X)) = 2X + 5 >= X + 1 = g#(X) top#(mark(X)) = X + 1 >= X = proper#(X) top#(mark(X)) = X + 1 >= X = top#(proper(X)) top#(ok(X)) = 2X + 4 >= 2X + 2 = active#(X) top#(ok(X)) = 2X + 4 >= 2X + 1 = top#(active(X)) g(mark(X)) = 4X + 8 >= 4X + 5 = mark(g(X)) g(ok(X)) = 8X + 20 >= 8X + 12 = ok(g(X)) f(mark(X1),X2) = X1 + X2 + 5 >= X1 + X2 + 5 = mark(f(X1,X2)) f(ok(X1),ok(X2)) = 2X1 + 2X2 + 12 >= 2X1 + 2X2 + 12 = ok(f(X1,X2)) active(f(g(X),Y)) = 8X + 2Y + 17 >= 5X + Y + 13 = mark(f(X,f(g(X),Y))) active(f(X1,X2)) = 2X1 + 2X2 + 9 >= 2X1 + X2 + 5 = f(active(X1),X2) active(g(X)) = 8X + 9 >= 8X + 8 = g(active(X)) proper(f(X1,X2)) = X1 + X2 + 4 >= X1 + X2 + 4 = f(proper(X1),proper(X2)) proper(g(X)) = 4X + 4 >= 4X + 4 = g(proper(X)) problem: DPs: TRS: g(mark(X)) -> mark(g(X)) g(ok(X)) -> ok(g(X)) f(mark(X1),X2) -> mark(f(X1,X2)) f(ok(X1),ok(X2)) -> ok(f(X1,X2)) active(f(g(X),Y)) -> mark(f(X,f(g(X),Y))) active(f(X1,X2)) -> f(active(X1),X2) active(g(X)) -> g(active(X)) proper(f(X1,X2)) -> f(proper(X1),proper(X2)) proper(g(X)) -> g(proper(X)) Qed