YES(?,O(n^2))
TRS:
 {*(x, *(minus y, y)) -> *(minus *(y, y), x)}
 DUP: We consider a non-duplicating system.
  Trs:
   {*(x, *(minus y, y)) -> *(minus *(y, y), x)}
  Matrix Interpretation:
   Interpretation class: triangular
           [X1]    [1 0][X1]   [0]
   [minus]([X0]) = [0 0][X0] + [0]
   
       [X3]  [X1]    [1 1][X3]   [1 1][X1]   [0]
   [*]([X2], [X0]) = [0 1][X2] + [0 1][X0] + [1]
   
   
   Qed