YES
O(n^2)
TRS:
 { +(0(), y) -> y,
  +(s(x), y) -> +(x, s(y)),
  +(s(x), y) -> s(+(x, y))}
 Natural interpretation:
  Strict:
   { +(0(), y) -> y,
    +(s(x), y) -> +(x, s(y)),
    +(s(x), y) -> s(+(x, y))}
  Weak:
   {}
  Interpretation class: deltarestricted
  [s](delta, X0) = + 1*X0 + 1 + 0*X0*delta + 0*delta
  [0](delta) = + 1 + 0*delta
  [+](delta, X1, X0) = + 1*X0 + 1*X1 + 1 + 0*X0*delta + 1*X1*delta + 0*delta
  s_tau_1(delta) = delta/(1 + 0 * delta)
  
  +_tau_1(delta) = delta/(1 + 1 * delta)+_tau_2(delta) = delta/(1 + 0 * delta)
  
  Qed