YES
Input TRS:
      1: f(a(),f(f(a(),x),a())) -> f(f(a(),f(a(),x)),a())
Number of strict rules: 1
Direct POLO(bPol) ... removes: 1
      a 	w: 5854
      f 	w: x1 + 2 * x2 + 30612
Number of strict rules: 0