MAYBE
Time: 0.009

Problem:
 Equations:
  
 TRS:
  fAC(hAC(g(g(x)),x),g(fAC(x,y))) -> fAC(hAC(g(x),g(x)),fAC(g(x),y))
  hAC(fAC(x,y),x) -> fAC(hAC(x,y),x)
  fAC(g(x),y) -> g(fAC(x,y))

Proof:
 Open