Input TRS:
    1: f(+(x,0())) -> f(x)
    2: +(x,+(y,z)) -> +(+(x,y),z)
Number of strict rules: 2
Direct Order(PosReal,>,Poly) ... removes: 1 2
     f(x1)	weight: 2 * x1
     0()	weight: 0
     +(x1,x2)	weight: (/ 1 4) + x1 + 2 * x2
Number of strict rules: 0
YES