YES
Input TRS:
      1: U11(tt(),M,N) -> U12(tt(),activate(M),activate(N))
      2: U12(tt(),M,N) -> s(plus(activate(N),activate(M)))
      3: plus(N,0()) -> N
      4: plus(N,s(M)) -> U11(tt(),M,N)
      5: activate(X) -> X
Number of strict rules: 5
Direct POLO(bPol) ... removes: 4 1 3 5 2
      U11	w: x1 + 2 * x2 + 2 * x3 + 28
      s 	w: x1 + 15
      activate	w: x1 + 1
      U12	w: 2 * x1 + 2 * x2 + 2 * x3 + 22
      0 	w: 1143
      plus	w: 2 * x1 + 2 * x2
      tt	w: 1
Number of strict rules: 0