MAYBE
* Step 1: DependencyPairs MAYBE
    + Considered Problem:
        - Strict TRS:
            dfib(s(s(x)),y) -> dfib(s(x),dfib(x,y))
        - Signature:
            {dfib/2} / {s/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {dfib} and constructors {s}
    + Applied Processor:
        DependencyPairs {dpKind_ = DT}
    + Details:
        We add the following dependency tuples:
        
        Strict DPs
          dfib#(s(s(x)),y) -> c_1(dfib#(s(x),dfib(x,y)),dfib#(x,y))
        Weak DPs
          
        
        and mark the set of starting terms.
* Step 2: Failure MAYBE
  + Considered Problem:
      - Strict DPs:
          dfib#(s(s(x)),y) -> c_1(dfib#(s(x),dfib(x,y)),dfib#(x,y))
      - Weak TRS:
          dfib(s(s(x)),y) -> dfib(s(x),dfib(x,y))
      - Signature:
          {dfib/2,dfib#/2} / {s/1,c_1/2}
      - Obligation:
          innermost runtime complexity wrt. defined symbols {dfib#} and constructors {s}
  + Applied Processor:
      EmptyProcessor
  + Details:
      The problem is still open.
MAYBE