YES
Time: 0.009

Problem:
 Equations:
  
 TRS:
  not(not(x)) -> x
  orAC(not(x),not(y)) -> not(andAC(x,y))

Proof:
 AC-RPO Processor:
  precedence:
   orAC > not > andAC
  status:
   
  problem:
   Equations:
    
   TRS:
    
  Qed