YES

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

Proof:
 Matrix Interpretation Processor: dim=1
  
  interpretation:
   [f](x0, x1, x2) = 7x0 + x1 + 6x2,
   
   [s](x0) = 2x0 + 1
  orientation:
   f(s(x),y,y) = 14x + 7y + 7 >= 13x + 7y + 6 = f(y,x,s(x))
  problem:
   
  Qed