MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          f() -> f()
      - Signature:
          {f/0} / {}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {f} and constructors {}
  + Applied Processor:
      NaturalPI {shape = Mixed 3, restrict = NoRestrict, uargs = UArgs, urules = URules, selector = Nothing}
  + Details:
      Incompatible
MAYBE