YES
Input TRS:
      1: minus(minus(x)) -> x
      2: minux(+(x,y)) -> +(minus(y),minus(x))
      3: +(minus(x),+(x,y)) -> y
      4: +(+(x,y),minus(y)) -> x
Number of strict rules: 4
Direct POLO(bPol) ... removes: 4 1 3 2
      minus	w: 2 * x1 + 1
      minux	w: 2 * x1 + 3
      + 	w: 2 * x1 + 2 * x2 + 2
Number of strict rules: 0