Input TRS:
    1: f(f(X)) -> c(n__f(n__g(n__f(X))))
    2: c(X) -> d(activate(X))
    3: h(X) -> c(n__d(X))
    4: f(X) -> n__f(X)
    5: g(X) -> n__g(X)
    6: d(X) -> n__d(X)
    7: activate(n__f(X)) -> f(activate(X))
    8: activate(n__g(X)) -> g(X)
    9: activate(n__d(X)) -> d(X)
    10: activate(X) -> X
Number of Rules: 10
Direct POLO(Pol) ... failed.