MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          goal(x,y) -> letexp(x,y)
          letexp(x,y) -> letexp(Cons(Cons(Nil(),Nil()),x),y)
      - Signature:
          {goal/2,letexp/2} / {Cons/2,Nil/0}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {goal,letexp} and constructors {Cons,Nil}
  + Applied Processor:
      Ara {heuristics_ = NoHeuristics, minDegree = 1, maxDegree = 3, araTimeout = 60, araFindStrictRules = Nothing, araSmtSolver = MiniSMT}
  + Details:
      The input can not be schown compatible.
MAYBE