(STRATEGY
    INNERMOST)

(VAR
    X X1 X2 Y)
(DATATYPES
    A = µX.< n__from(X), s(X), n__nil, 0, n__cons(X, X) >)
(SIGNATURES
    from :: [A] -> A
    length :: [A] -> A
    length1 :: [A] -> A
    nil :: [] -> A
    cons :: [A x A] -> A
    activate :: [A] -> A)
(RULES
    from(X) -> cons(X,n__from(s(X)))
    length(n__nil()) -> 0()
    length(n__cons(X,Y)) ->
      s(length1(activate(Y)))
    length1(X) ->
      length(activate(X))
    from(X) -> n__from(X)
    nil() -> n__nil()
    cons(X1,X2) -> n__cons(X1,X2)
    activate(n__from(X)) -> from(X)
    activate(n__nil()) -> nil()
    activate(n__cons(X1,X2)) ->
      cons(X1,X2)
    activate(X) -> X)