YES
O(n^2)
TRS:
 {
     r1(empty(), a) -> a,
  r1(cons(x, k), a) -> r1(k, cons(x, a)),
            rev(ls) -> r1(ls, empty())
 }
 Natural interpretation:
  Strict:
   {
       r1(empty(), a) -> a,
    r1(cons(x, k), a) -> r1(k, cons(x, a)),
              rev(ls) -> r1(ls, empty())
   }
  Weak:
   {}
  Interpretation class: deltarestricted
  [cons](delta, X1, X0) = + 1*X0 + 0*X1 + 1 + 0*X0*delta + 1*X1*delta + 0*delta
  [rev](delta, X0) = + 1*X0 + 1 + 1*X0*delta + 1*delta
  [empty](delta) = + 1 + 0*delta
  [r1](delta, X1, X0) = + 1*X0 + 1*X1 + 0 + 0*X0*delta + 1*X1*delta + 0*delta
  cons_tau_1(delta) = delta/(0 + 1 * delta)cons_tau_2(delta) = delta/(1 + 0 * delta)
  rev_tau_1(delta) = delta/(1 + 1 * delta)
  
  r1_tau_1(delta) = delta/(1 + 1 * delta)r1_tau_2(delta) = delta/(1 + 0 * delta)
  
  Qed