MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          0() -> n__0()
          U11(tt(),L) -> s(length(activate(L)))
          activate(X) -> X
          activate(n__0()) -> 0()
          activate(n__cons(X1,X2)) -> cons(X1,X2)
          activate(n__isNat(X)) -> isNat(X)
          activate(n__isNatIList(X)) -> isNatIList(X)
          activate(n__isNatList(X)) -> isNatList(X)
          activate(n__length(X)) -> length(X)
          activate(n__nil()) -> nil()
          activate(n__s(X)) -> s(X)
          activate(n__zeros()) -> zeros()
          and(tt(),X) -> activate(X)
          cons(X1,X2) -> n__cons(X1,X2)
          isNat(X) -> n__isNat(X)
          isNat(n__0()) -> tt()
          isNat(n__length(V1)) -> isNatList(activate(V1))
          isNat(n__s(V1)) -> isNat(activate(V1))
          isNatIList(V) -> isNatList(activate(V))
          isNatIList(X) -> n__isNatIList(X)
          isNatIList(n__cons(V1,V2)) -> and(isNat(activate(V1)),n__isNatIList(activate(V2)))
          isNatIList(n__zeros()) -> tt()
          isNatList(X) -> n__isNatList(X)
          isNatList(n__cons(V1,V2)) -> and(isNat(activate(V1)),n__isNatList(activate(V2)))
          isNatList(n__nil()) -> tt()
          length(X) -> n__length(X)
          length(cons(N,L)) -> U11(and(isNatList(activate(L)),n__isNat(N)),activate(L))
          length(nil()) -> 0()
          nil() -> n__nil()
          s(X) -> n__s(X)
          zeros() -> cons(0(),n__zeros())
          zeros() -> n__zeros()
      - Signature:
          {0/0,U11/2,activate/1,and/2,cons/2,isNat/1,isNatIList/1,isNatList/1,length/1,nil/0,s/1,zeros/0} / {n__0/0
          ,n__cons/2,n__isNat/1,n__isNatIList/1,n__isNatList/1,n__length/1,n__nil/0,n__s/1,n__zeros/0,tt/0}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {0,U11,activate,and,cons,isNat,isNatIList,isNatList,length
          ,nil,s,zeros} and constructors {n__0,n__cons,n__isNat,n__isNatIList,n__isNatList,n__length,n__nil,n__s
          ,n__zeros,tt}
  + Applied Processor:
      MI {miKind = Automaton Nothing, miDimension = 3, miUArgs = NoUArgs, miURules = NoURules, miSelector = Nothing}
  + Details:
      Incompatible
MAYBE