Input TRS:
    1: f(X) -> if(X,c(),n__f(true()))
    2: if(true(),X,Y) -> X
    3: if(false(),X,Y) -> activate(Y)
    4: f(X) -> n__f(X)
    5: activate(n__f(X)) -> f(X)
    6: activate(X) -> X
Number of Rules: 6
Direct POLO(Sum) ... removes: 6 5 4 3 2 1
	I(if) = x1 + x2 + x3
	I(c) = 0
	I(f) = x1 + 2
	I(activate) = x1 + 3
	I(n__f) = x1
	I(true) = 1
	I(false) = 4
Number of Rules: 0