MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          -(x,0()) -> x
          -(0(),s(y)) -> 0()
          -(s(x),s(y)) -> -(x,y)
          f(0()) -> 0()
          f(s(x)) -> -(s(x),g(f(x)))
          g(0()) -> s(0())
          g(s(x)) -> -(s(x),f(g(x)))
      - Signature:
          {-/2,f/1,g/1} / {0/0,s/1}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {-,f,g} and constructors {0,s}
  + Applied Processor:
      NaturalPI {shape = Mixed 3, restrict = NoRestrict, uargs = UArgs, urules = URules, selector = Nothing}
  + Details:
      Incompatible
MAYBE