Input TRS:
    1: +(*(x,y),*(x,z)) -> *(x,+(y,z))
    2: +(+(x,y),z) -> +(x,+(y,z))
    3: +(*(x,y),+(*(x,z),u())) -> +(*(x,+(y,z)),u())
Number of Rules: 3
Direct QWPOS(max) ... failed.