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