MAYBE
Time: 0.027099
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))}
  UR:
   {dfib(s s x, y) -> dfib(s x, dfib(x, y)),
           a(z, w) -> z,
           a(z, w) -> w}
   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