YES Problem: active(f(f(a()))) -> mark(f(g(f(a())))) active(g(X)) -> g(active(X)) g(mark(X)) -> mark(g(X)) proper(f(X)) -> f(proper(X)) proper(a()) -> ok(a()) proper(g(X)) -> g(proper(X)) f(ok(X)) -> ok(f(X)) g(ok(X)) -> ok(g(X)) top(mark(X)) -> top(proper(X)) top(ok(X)) -> top(active(X)) Proof: Matrix Interpretation Processor: dim=3 interpretation: [1 0 1] [0] [mark](x0) = [0 0 1]x0 + [0] [0 0 0] [1], [1 1 0] [f](x0) = [0 0 1]x0 [0 1 0] , [1 0 1] [0] [g](x0) = [0 0 1]x0 + [0] [0 0 0] [1], [proper](x0) = x0 , [0] [a] = [0] [1], [1 0 0] [top](x0) = [0 0 0]x0 [0 0 0] , [ok](x0) = x0 , [active](x0) = x0 orientation: [1] [0] active(f(f(a()))) = [0] >= [0] = mark(f(g(f(a())))) [1] [1] [1 0 1] [0] [1 0 1] [0] active(g(X)) = [0 0 1]X + [0] >= [0 0 1]X + [0] = g(active(X)) [0 0 0] [1] [0 0 0] [1] [1 0 1] [1] [1 0 1] [1] g(mark(X)) = [0 0 0]X + [1] >= [0 0 0]X + [1] = mark(g(X)) [0 0 0] [1] [0 0 0] [1] [1 1 0] [1 1 0] proper(f(X)) = [0 0 1]X >= [0 0 1]X = f(proper(X)) [0 1 0] [0 1 0] [0] [0] proper(a()) = [0] >= [0] = ok(a()) [1] [1] [1 0 1] [0] [1 0 1] [0] proper(g(X)) = [0 0 1]X + [0] >= [0 0 1]X + [0] = g(proper(X)) [0 0 0] [1] [0 0 0] [1] [1 1 0] [1 1 0] f(ok(X)) = [0 0 1]X >= [0 0 1]X = ok(f(X)) [0 1 0] [0 1 0] [1 0 1] [0] [1 0 1] [0] g(ok(X)) = [0 0 1]X + [0] >= [0 0 1]X + [0] = ok(g(X)) [0 0 0] [1] [0 0 0] [1] [1 0 1] [1 0 0] top(mark(X)) = [0 0 0]X >= [0 0 0]X = top(proper(X)) [0 0 0] [0 0 0] [1 0 0] [1 0 0] top(ok(X)) = [0 0 0]X >= [0 0 0]X = top(active(X)) [0 0 0] [0 0 0] problem: active(g(X)) -> g(active(X)) g(mark(X)) -> mark(g(X)) proper(f(X)) -> f(proper(X)) proper(a()) -> ok(a()) proper(g(X)) -> g(proper(X)) f(ok(X)) -> ok(f(X)) g(ok(X)) -> ok(g(X)) top(mark(X)) -> top(proper(X)) top(ok(X)) -> top(active(X)) Matrix Interpretation Processor: dim=1 interpretation: [mark](x0) = 2x0 + 1, [f](x0) = 2x0 + 1, [g](x0) = x0, [proper](x0) = 2x0 + 1, [a] = 2, [top](x0) = x0 + 6, [ok](x0) = 2x0 + 1, [active](x0) = 2x0 orientation: active(g(X)) = 2X >= 2X = g(active(X)) g(mark(X)) = 2X + 1 >= 2X + 1 = mark(g(X)) proper(f(X)) = 4X + 3 >= 4X + 3 = f(proper(X)) proper(a()) = 5 >= 5 = ok(a()) proper(g(X)) = 2X + 1 >= 2X + 1 = g(proper(X)) f(ok(X)) = 4X + 3 >= 4X + 3 = ok(f(X)) g(ok(X)) = 2X + 1 >= 2X + 1 = ok(g(X)) top(mark(X)) = 2X + 7 >= 2X + 7 = top(proper(X)) top(ok(X)) = 2X + 7 >= 2X + 6 = top(active(X)) problem: active(g(X)) -> g(active(X)) g(mark(X)) -> mark(g(X)) proper(f(X)) -> f(proper(X)) proper(a()) -> ok(a()) proper(g(X)) -> g(proper(X)) f(ok(X)) -> ok(f(X)) g(ok(X)) -> ok(g(X)) top(mark(X)) -> top(proper(X)) Matrix Interpretation Processor: dim=1 interpretation: [mark](x0) = 2x0 + 3, [f](x0) = x0, [g](x0) = 6x0, [proper](x0) = 2x0, [a] = 0, [top](x0) = x0 + 4, [ok](x0) = 2x0, [active](x0) = 5x0 orientation: active(g(X)) = 30X >= 30X = g(active(X)) g(mark(X)) = 12X + 18 >= 12X + 3 = mark(g(X)) proper(f(X)) = 2X >= 2X = f(proper(X)) proper(a()) = 0 >= 0 = ok(a()) proper(g(X)) = 12X >= 12X = g(proper(X)) f(ok(X)) = 2X >= 2X = ok(f(X)) g(ok(X)) = 12X >= 12X = ok(g(X)) top(mark(X)) = 2X + 7 >= 2X + 4 = top(proper(X)) problem: active(g(X)) -> g(active(X)) proper(f(X)) -> f(proper(X)) proper(a()) -> ok(a()) proper(g(X)) -> g(proper(X)) f(ok(X)) -> ok(f(X)) g(ok(X)) -> ok(g(X)) Matrix Interpretation Processor: dim=3 interpretation: [1 1 0] [0] [f](x0) = [0 0 0]x0 + [1] [1 0 0] [0], [0] [g](x0) = x0 + [0] [1], [1 0 0] [1] [proper](x0) = [0 1 0]x0 + [0] [0 1 1] [0], [0] [a] = [1] [0], [1 1 0] [0] [ok](x0) = [0 0 0]x0 + [1] [1 0 0] [0], [1 0 1] [0] [active](x0) = [0 0 0]x0 + [1] [0 0 1] [0] orientation: [1 0 1] [1] [1 0 1] [0] active(g(X)) = [0 0 0]X + [1] >= [0 0 0]X + [1] = g(active(X)) [0 0 1] [1] [0 0 1] [1] [1 1 0] [1] [1 1 0] [1] proper(f(X)) = [0 0 0]X + [1] >= [0 0 0]X + [1] = f(proper(X)) [1 0 0] [1] [1 0 0] [1] [1] [1] proper(a()) = [1] >= [1] = ok(a()) [1] [0] [1 0 0] [1] [1 0 0] [1] proper(g(X)) = [0 1 0]X + [0] >= [0 1 0]X + [0] = g(proper(X)) [0 1 1] [1] [0 1 1] [1] [1 1 0] [1] [1 1 0] [1] f(ok(X)) = [0 0 0]X + [1] >= [0 0 0]X + [1] = ok(f(X)) [1 1 0] [0] [1 1 0] [0] [1 1 0] [0] [1 1 0] [0] g(ok(X)) = [0 0 0]X + [1] >= [0 0 0]X + [1] = ok(g(X)) [1 0 0] [1] [1 0 0] [0] problem: proper(f(X)) -> f(proper(X)) proper(a()) -> ok(a()) proper(g(X)) -> g(proper(X)) f(ok(X)) -> ok(f(X)) g(ok(X)) -> ok(g(X)) Matrix Interpretation Processor: dim=1 interpretation: [f](x0) = x0, [g](x0) = 4x0 + 3, [proper](x0) = 5x0 + 4, [a] = 2, [ok](x0) = 4x0 + 6 orientation: proper(f(X)) = 5X + 4 >= 5X + 4 = f(proper(X)) proper(a()) = 14 >= 14 = ok(a()) proper(g(X)) = 20X + 19 >= 20X + 19 = g(proper(X)) f(ok(X)) = 4X + 6 >= 4X + 6 = ok(f(X)) g(ok(X)) = 16X + 27 >= 16X + 18 = ok(g(X)) problem: proper(f(X)) -> f(proper(X)) proper(a()) -> ok(a()) proper(g(X)) -> g(proper(X)) f(ok(X)) -> ok(f(X)) Matrix Interpretation Processor: dim=3 interpretation: [1 0 0] [0] [f](x0) = [0 0 1]x0 + [0] [0 1 0] [1], [1 0 0] [0] [g](x0) = [0 0 1]x0 + [0] [0 1 0] [1], [1 1 1] [0] [proper](x0) = [0 0 1]x0 + [0] [0 1 0] [1], [0] [a] = [0] [1], [1 0 0] [0] [ok](x0) = [0 0 1]x0 + [0] [0 1 0] [1] orientation: [1 1 1] [1] [1 1 1] [0] proper(f(X)) = [0 1 0]X + [1] >= [0 1 0]X + [1] = f(proper(X)) [0 0 1] [1] [0 0 1] [1] [1] [0] proper(a()) = [1] >= [1] = ok(a()) [1] [1] [1 1 1] [1] [1 1 1] [0] proper(g(X)) = [0 1 0]X + [1] >= [0 1 0]X + [1] = g(proper(X)) [0 0 1] [1] [0 0 1] [1] [0] [0] f(ok(X)) = X + [1] >= X + [1] = ok(f(X)) [1] [1] problem: f(ok(X)) -> ok(f(X)) Matrix Interpretation Processor: dim=3 interpretation: [1 1 0] [f](x0) = [0 1 0]x0 [0 0 0] , [1 0 0] [0] [ok](x0) = [0 1 0]x0 + [1] [0 0 0] [0] orientation: [1 1 0] [1] [1 1 0] [0] f(ok(X)) = [0 1 0]X + [1] >= [0 1 0]X + [1] = ok(f(X)) [0 0 0] [0] [0 0 0] [0] problem: Qed