YES Problem: active(c()) -> mark(f(g(c()))) active(f(g(X))) -> mark(g(X)) proper(c()) -> ok(c()) proper(f(X)) -> f(proper(X)) 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 1 1] [top](x0) = [0 0 0]x0 [0 1 0] , [1 0 0] [0] [ok](x0) = [0 1 0]x0 + [0] [0 0 0] [1], [proper](x0) = x0 , [mark](x0) = x0 , [1 0 0] [f](x0) = [0 0 0]x0 [0 0 1] , [1 0 0] [0] [g](x0) = [0 0 0]x0 + [0] [0 0 0] [1], [1 1 0] [0] [active](x0) = [0 0 0]x0 + [0] [0 0 0] [1], [0] [c] = [1] [1] orientation: [1] [0] active(c()) = [0] >= [0] = mark(f(g(c()))) [1] [1] [1 0 0] [0] [1 0 0] [0] active(f(g(X))) = [0 0 0]X + [0] >= [0 0 0]X + [0] = mark(g(X)) [0 0 0] [1] [0 0 0] [1] [0] [0] proper(c()) = [1] >= [1] = ok(c()) [1] [1] [1 0 0] [1 0 0] proper(f(X)) = [0 0 0]X >= [0 0 0]X = f(proper(X)) [0 0 1] [0 0 1] [1 0 0] [0] [1 0 0] [0] proper(g(X)) = [0 0 0]X + [0] >= [0 0 0]X + [0] = g(proper(X)) [0 0 0] [1] [0 0 0] [1] [1 0 0] [0] [1 0 0] [0] f(ok(X)) = [0 0 0]X + [0] >= [0 0 0]X + [0] = ok(f(X)) [0 0 0] [1] [0 0 0] [1] [1 0 0] [0] [1 0 0] [0] g(ok(X)) = [0 0 0]X + [0] >= [0 0 0]X + [0] = ok(g(X)) [0 0 0] [1] [0 0 0] [1] [1 1 1] [1 1 1] top(mark(X)) = [0 0 0]X >= [0 0 0]X = top(proper(X)) [0 1 0] [0 1 0] [1 1 0] [1] [1 1 0] [1] top(ok(X)) = [0 0 0]X + [0] >= [0 0 0]X + [0] = top(active(X)) [0 1 0] [0] [0 0 0] [0] problem: active(f(g(X))) -> mark(g(X)) proper(c()) -> ok(c()) proper(f(X)) -> f(proper(X)) 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=3 interpretation: [1 1 0] [top](x0) = [0 0 0]x0 [0 0 0] , [1 0 0] [0] [ok](x0) = [0 0 0]x0 + [1] [0 0 1] [0], [proper](x0) = x0 , [1 0 0] [mark](x0) = [0 1 0]x0 [0 0 0] , [1 0 1] [f](x0) = [0 1 0]x0 [0 0 0] , [1 0 0] [0] [g](x0) = [0 0 0]x0 + [1] [0 0 0] [1], [1 0 0] [0] [active](x0) = [0 0 0]x0 + [1] [0 1 0] [0], [1] [c] = [1] [0] orientation: [1 0 0] [1] [1 0 0] [0] active(f(g(X))) = [0 0 0]X + [1] >= [0 0 0]X + [1] = mark(g(X)) [0 0 0] [1] [0 0 0] [0] [1] [1] proper(c()) = [1] >= [1] = ok(c()) [0] [0] [1 0 1] [1 0 1] proper(f(X)) = [0 1 0]X >= [0 1 0]X = f(proper(X)) [0 0 0] [0 0 0] [1 0 0] [0] [1 0 0] [0] proper(g(X)) = [0 0 0]X + [1] >= [0 0 0]X + [1] = g(proper(X)) [0 0 0] [1] [0 0 0] [1] [1 0 1] [0] [1 0 1] [0] f(ok(X)) = [0 0 0]X + [1] >= [0 0 0]X + [1] = ok(f(X)) [0 0 0] [0] [0 0 0] [0] [1 0 0] [0] [1 0 0] [0] g(ok(X)) = [0 0 0]X + [1] >= [0 0 0]X + [1] = ok(g(X)) [0 0 0] [1] [0 0 0] [1] [1 1 0] [1 1 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] [1 0 0] [1] top(ok(X)) = [0 0 0]X + [0] >= [0 0 0]X + [0] = top(active(X)) [0 0 0] [0] [0 0 0] [0] problem: proper(c()) -> ok(c()) proper(f(X)) -> f(proper(X)) 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: [top](x0) = 2x0 + 5, [ok](x0) = x0, [proper](x0) = 4x0, [mark](x0) = 4x0 + 6, [f](x0) = 4x0 + 1, [g](x0) = 6x0 + 1, [active](x0) = x0, [c] = 4 orientation: proper(c()) = 16 >= 4 = ok(c()) proper(f(X)) = 16X + 4 >= 16X + 1 = f(proper(X)) proper(g(X)) = 24X + 4 >= 24X + 1 = g(proper(X)) f(ok(X)) = 4X + 1 >= 4X + 1 = ok(f(X)) g(ok(X)) = 6X + 1 >= 6X + 1 = ok(g(X)) top(mark(X)) = 8X + 17 >= 8X + 5 = top(proper(X)) top(ok(X)) = 2X + 5 >= 2X + 5 = top(active(X)) problem: f(ok(X)) -> ok(f(X)) g(ok(X)) -> ok(g(X)) top(ok(X)) -> top(active(X)) Matrix Interpretation Processor: dim=1 interpretation: [top](x0) = x0 + 5, [ok](x0) = x0 + 4, [f](x0) = x0 + 6, [g](x0) = x0, [active](x0) = x0 + 3 orientation: f(ok(X)) = X + 10 >= X + 10 = ok(f(X)) g(ok(X)) = X + 4 >= X + 4 = ok(g(X)) top(ok(X)) = X + 9 >= X + 8 = top(active(X)) problem: f(ok(X)) -> ok(f(X)) g(ok(X)) -> ok(g(X)) Matrix Interpretation Processor: dim=3 interpretation: [0] [ok](x0) = x0 + [1] [1], [1 0 1] [f](x0) = [0 1 0]x0 [0 1 0] , [1 1 0] [g](x0) = [0 0 1]x0 [1 0 1] orientation: [1 0 1] [1] [1 0 1] [0] f(ok(X)) = [0 1 0]X + [1] >= [0 1 0]X + [1] = ok(f(X)) [0 1 0] [1] [0 1 0] [1] [1 1 0] [1] [1 1 0] [0] g(ok(X)) = [0 0 1]X + [1] >= [0 0 1]X + [1] = ok(g(X)) [1 0 1] [1] [1 0 1] [1] problem: Qed