MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          rev(++(x,x)) -> rev(x)
          rev(++(x,y)) -> ++(rev(y),rev(x))
          rev(a()) -> a()
          rev(b()) -> b()
      - Signature:
          {rev/1} / {++/2,a/0,b/0}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {rev} and constructors {++,a,b}
  + Applied Processor:
      Ara {heuristics_ = NoHeuristics, minDegree = 1, maxDegree = 3, araTimeout = 60, araFindStrictRules = Nothing, araSmtSolver = Z3}
  + Details:
      The input can not be schown compatible.
MAYBE