TRS: { g(A()) -> A(), g(B()) -> A(), g(B()) -> B(), g(C()) -> A(), g(C()) -> B(), g(C()) -> C(), foldB(t, 0()) -> t, foldB(t, s(n)) -> f(foldB(t, n), B()), foldC(t, 0()) -> t, foldC(t, s(n)) -> f(foldC(t, n), C()), f(t, x) -> f'(t, g(x)), f'(triple(a, b, c), C()) -> triple(a, b, s(c)), f'(triple(a, b, c), B()) -> f(triple(a, b, c), A()), f'(triple(a, b, c), A()) -> f''(foldB(triple(s(a), 0(), c), b)), f''(triple(a, b, c)) -> foldC(triple(a, b, 0()), c), fold(t, x, 0()) -> t, fold(t, x, s(n)) -> f(fold(t, x, n), x)} Fail