YES
O(n^4)
TRS:
 {
           not(false()) -> true(),
            not(true()) -> false(),
        evenodd(x, 0()) -> not(evenodd(x, s(0()))),
  evenodd(s(x), s(0())) -> evenodd(x, 0()),
   evenodd(0(), s(0())) -> false()
 }
 DUP: We consider a non-duplicating system.
  Trs:
   {
             not(false()) -> true(),
              not(true()) -> false(),
          evenodd(x, 0()) -> not(evenodd(x, s(0()))),
    evenodd(s(x), s(0())) -> evenodd(x, 0()),
     evenodd(0(), s(0())) -> false()
   }
  Matrix Interpretation:
   Interpretation class: triangular
         [0]
         [2]
   [0] = [2]
         [3]
   
       [X3]    [1 0 0 0][X3]   [0]
       [X2]    [0 0 0 0][X2]   [0]
   [s]([X1]) = [0 0 1 3][X1] + [0]
       [X0]    [0 0 0 1][X0]   [1]
   
             [X7]  [X3]    [1 0 0 3][X7]   [1 1 0 0][X3]   [0]
             [X6]  [X2]    [0 0 0 0][X6]   [0 0 0 0][X2]   [0]
   [evenodd]([X5], [X1]) = [0 0 1 2][X5] + [0 0 1 0][X1] + [0]
             [X4]  [X0]    [0 0 0 0][X4]   [0 0 0 1][X0]   [0]
   
            [0]
            [0]
   [true] = [0]
            [0]
   
         [X3]    [1 0 0 0][X3]   [1]
         [X2]    [0 0 0 0][X2]   [0]
   [not]([X1]) = [0 0 0 0][X1] + [0]
         [X0]    [0 0 0 0][X0]   [0]
   
             [0]
             [0]
   [false] = [0]
             [0]
   
   
   Qed