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