YES
O(n^4)
TRS:
 {-(-(neg(x), neg(x)), -(neg(y), neg(y))) -> -(-(x, y), -(x, y))}
 DUP: We consider a non-duplicating system.
  Trs:
   {-(-(neg(x), neg(x)), -(neg(y), neg(y))) -> -(-(x, y), -(x, y))}
  Matrix Interpretation:
   Interpretation class: triangular
         [X3]    [1 0 0 0][X3]   [0]
         [X2]    [0 0 0 0][X2]   [0]
   [neg]([X1]) = [0 0 0 0][X1] + [0]
         [X0]    [0 0 0 1][X0]   [1]
   
       [X7]  [X3]    [1 0 0 0][X7]   [1 0 0 1][X3]   [0]
       [X6]  [X2]    [0 0 0 0][X6]   [0 0 0 0][X2]   [0]
   [-]([X5], [X1]) = [0 0 0 0][X5] + [0 0 0 0][X1] + [0]
       [X4]  [X0]    [0 0 0 1][X4]   [0 0 0 0][X0]   [0]
   
   
   Qed