Input TRS:
    1: top(old(x)) -> top(check(x))
    2: top(new(x)) -> top(check(x))
   e1: bot() ->= new(bot())	[relative]
   e2: check(new(x)) ->= new(check(x))	[relative]
   e3: check(old(x)) ->= old(check(x))	[relative]
   e4: check(old(x)) ->= old(x)	[relative]
Number of Rules: 2
Direct Mat2b ... removes: 1
	I(new) = [1,1;0,0] * x1
	I(top) = [1,1;1,1] * x1
	I(bot) = [1;0]
	I(check) = x1
	I(old) = [1,1;0,1] * x1 + [1;0]
Number of Rules: 1
Direct Mat2b ... removes: e3 e4
	I(new) = [2,0;1,0] * x1 + [0;1]
	I(top) = [2,1;0,1] * x1
	I(bot) = [0;1]
	I(check) = [2,0;1,0] * x1 + [0;1]
	I(old) = [1,0;0,0] * x1 + [1;1]
Number of Rules: 1
Direct Mat2b ... failed.