YES 1 decompositions #1 ----------- 4: f(h(x7),h(x8)) -> f(x8,x7) 5: f(x9,x10) -> f(x10,x9) 6: g(x11) -> h(x11) 7: h(x12) -> g(x12) @Rule Labeling --- R 4: f(h(x7),h(x8)) -> f(x8,x7) 5: f(x9,x10) -> f(x10,x9) 6: g(x11) -> h(x11) 7: h(x12) -> g(x12) --- S 4: f(h(x7),h(x8)) -> f(x8,x7) 5: f(x9,x10) -> f(x10,x9) 6: g(x11) -> h(x11) 7: h(x12) -> g(x12) NOTE: input TRS is reduced original is 1: f(g(x1),g(x2)) -> f(g(x1),h(x2)) 2: f(h(x3),g(x4)) -> f(g(x3),g(x4)) 3: f(g(x5),h(x6)) -> f(x5,x6) 4: f(h(x7),h(x8)) -> f(x8,x7) 5: f(x9,x10) -> f(x10,x9) 6: g(x11) -> h(x11) 7: h(x12) -> g(x12) reduced to 4: f(h(x7),h(x8)) -> f(x8,x7) 5: f(x9,x10) -> f(x10,x9) 6: g(x11) -> h(x11) 7: h(x12) -> g(x12)