YES
Time: 0.012

Problem:
 Equations:
  
 TRS:
  fAC(x,one()) -> x
  fAC(x,x) -> x

Proof:
 AC-KBO Processor:
  precedence:
   fAC > one
   weight function:
    w0 = 4
    w(one) = 4
    w(fAC) = 0
   problem:
    Equations:
     
    TRS:
     
   Qed