MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          concat(cons(U,V),Y) -> cons(U,concat(V,Y))
          concat(leaf(),Y) -> Y
          lessleaves(X,leaf()) -> false()
          lessleaves(cons(U,V),cons(W,Z)) -> lessleaves(concat(U,V),concat(W,Z))
          lessleaves(leaf(),cons(W,Z)) -> true()
      - Signature:
          {concat/2,lessleaves/2} / {cons/2,false/0,leaf/0,true/0}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {concat,lessleaves} and constructors {cons,false,leaf
          ,true}
  + Applied Processor:
      NaturalPI {shape = Mixed 3, restrict = NoRestrict, uargs = UArgs, urules = URules, selector = Nothing}
  + Details:
      Incompatible
MAYBE