Input TRS:
    1: minus(minus(x)) -> x
    2: minus(h(x)) -> h(minus(x))
    3: minus(f(x,y)) -> f(minus(y),minus(x))
Number of Rules: 3
Direct POLO(Sum) ...Direct QLPOS ... removes: 3 1
	sigma(f) = [2,1]
	sigma(h) = [1]
	sigma(minus) = [1]
    PREC: h = minus > f
Number of Rules: 1
Direct POLO(Sum) ...Direct QLPOS ... removes: 2
	sigma(h) = [1]
	sigma(minus) = [1]
    PREC: minus > h
Number of Rules: 0