YES Problem: f(f(X)) -> c() c() -> d() h(X) -> c() Proof: DP Processor: DPs: f#(f(X)) -> c#() h#(X) -> c#() TRS: f(f(X)) -> c() c() -> d() h(X) -> c() Arctic Interpretation Processor: dimension: 1 interpretation: [h#](x0) = x0 + 8, [c#] = 0, [f#](x0) = 8, [h](x0) = x0 + 2, [d] = 0, [c] = 1, [f](x0) = x0 + 4 orientation: f#(f(X)) = 8 >= 0 = c#() h#(X) = X + 8 >= 0 = c#() f(f(X)) = X + 4 >= 1 = c() c() = 1 >= 0 = d() h(X) = X + 2 >= 1 = c() problem: DPs: TRS: f(f(X)) -> c() c() -> d() h(X) -> c() Qed