YES We show the termination of the TRS R: and(not(not(x)),y,not(z)) -> and(y,band(x,z),x) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: and#(not(not(x)),y,not(z)) -> and#(y,band(x,z),x) and R consists of: r1: and(not(not(x)),y,not(z)) -> and(y,band(x,z),x) The estimated dependency graph contains the following SCCs: {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: and#(not(not(x)),y,not(z)) -> and#(y,band(x,z),x) and R consists of: r1: and(not(not(x)),y,not(z)) -> and(y,band(x,z),x) The set of usable rules consists of (no rules) Take the reduction pair: matrix interpretations: carrier: N^2 order: lexicographic order interpretations: and#_A(x1,x2,x3) = x1 + ((1,0),(1,1)) x2 + ((1,0),(1,1)) x3 not_A(x1) = ((1,0),(1,1)) x1 + (1,1) band_A(x1,x2) = ((0,0),(1,0)) x1 + ((1,0),(1,1)) x2 + (1,5) The next rules are strictly ordered: p1 We remove them from the problem. Then no dependency pair remains.