MAYBE

Problem:
 f(f(x,a()),y) -> f(y,f(x,y))

Proof:
 DP Processor:
  DPs:
   f#(f(x,a()),y) -> f#(x,y)
   f#(f(x,a()),y) -> f#(y,f(x,y))
  TRS:
   f(f(x,a()),y) -> f(y,f(x,y))
  SCC Processor:
   #sccs: 1
   #rules: 2
   #arcs: 4/4
   DPs:
    f#(f(x,a()),y) -> f#(x,y)
    f#(f(x,a()),y) -> f#(y,f(x,y))
   TRS:
    f(f(x,a()),y) -> f(y,f(x,y))
   Open