MAYBE
* Step 1: Failure MAYBE
  + Considered Problem:
      - Strict TRS:
          f(minus(x)) -> minus(minus(minus(f(x))))
          minus(*(x,y)) -> +(minus(minus(minus(x))),minus(minus(minus(y))))
          minus(+(x,y)) -> *(minus(minus(minus(x))),minus(minus(minus(y))))
          minus(minus(x)) -> x
      - Signature:
          {f/1,minus/1} / {*/2,+/2}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {f,minus} and constructors {*,+}
  + Applied Processor:
      EmptyProcessor
  + Details:
      The problem is still open.
MAYBE