MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          d(0()) -> 0()
          d(s(x)) -> s(s(d(x)))
          exp(0()) -> s(0())
          exp(s(x)) -> d(exp(x))
      - Signature:
          {d/1,exp/1} / {0/0,s/1}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {d,exp} and constructors {0,s}
  + Applied Processor:
      EmptyProcessor
  + Details:
      The problem is still open.
MAYBE