TRS:
 {       D(t()) -> 1(),
  D(constant()) -> 0(),
     D(+(x, y)) -> +(D(x), D(y)),
     D(*(x, y)) -> +(*(y, D(x)), *(x, D(y))),
     D(-(x, y)) -> -(D(x), D(y))}
 Cdiprover:
  Interpretation class: pizerosimplemixed
  Complexity bound: POLYTIME COMPUTABLE
  -(X6, X5) = + 1*X5 + 1*X6 + 1
  *(X4, X3) = + 1*X3 + 1*X4 + 1
  +(X2, X1) = + 1*X1 + 1*X2 + 1
  constant = + 1
  0 = + 1
  t = + 1
  D(X0) = + 2*X0^2 + 0 + 2*X0
  1 = + 1
  
  Qed