MAYBE
Time: 0.000547
TRS:
 {dfib(s s x, y) -> dfib(s x, dfib(x, y))}
 DP:
  DP:
   {dfib#(s s x, y) -> dfib#(x, y),
    dfib#(s s x, y) -> dfib#(s x, dfib(x, y))}
  TRS:
  {dfib(s s x, y) -> dfib(s x, dfib(x, y))}
  EDG:
   {(dfib#(s s x, y) -> dfib#(x, y), dfib#(s s x, y) -> dfib#(s x, dfib(x, y)))
    (dfib#(s s x, y) -> dfib#(x, y), dfib#(s s x, y) -> dfib#(x, y))
    (dfib#(s s x, y) -> dfib#(s x, dfib(x, y)), dfib#(s s x, y) -> dfib#(x, y))
    (dfib#(s s x, y) -> dfib#(s x, dfib(x, y)), dfib#(s s x, y) -> dfib#(s x, dfib(x, y)))}
   STATUS:
    arrows: 0.000000
    SCCS (1):
     Scc:
      {dfib#(s s x, y) -> dfib#(x, y),
       dfib#(s s x, y) -> dfib#(s x, dfib(x, y))}
     
     SCC (2):
      Strict:
       {dfib#(s s x, y) -> dfib#(x, y),
        dfib#(s s x, y) -> dfib#(s x, dfib(x, y))}
      Weak:
      {dfib(s s x, y) -> dfib(s x, dfib(x, y))}
      Open