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