YES We show the termination of the TRS R: not(and(x,y)) -> or(not(x),not(y)) not(or(x,y)) -> and(not(x),not(y)) and(x,or(y,z)) -> or(and(x,y),and(x,z)) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: not#(and(x,y)) -> not#(x) p2: not#(and(x,y)) -> not#(y) p3: not#(or(x,y)) -> and#(not(x),not(y)) p4: not#(or(x,y)) -> not#(x) p5: not#(or(x,y)) -> not#(y) p6: and#(x,or(y,z)) -> and#(x,y) p7: and#(x,or(y,z)) -> and#(x,z) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The estimated dependency graph contains the following SCCs: {p1, p2, p4, p5} {p6, p7} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: not#(and(x,y)) -> not#(x) p2: not#(or(x,y)) -> not#(y) p3: not#(or(x,y)) -> not#(x) p4: not#(and(x,y)) -> not#(y) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The set of usable rules consists of (no rules) Take the reduction pair: weighted path order base order: matrix interpretations: carrier: N^2 order: lexicographic order interpretations: not#_A(x1) = x1 + (1,1) and_A(x1,x2) = ((1,0),(1,1)) x1 + x2 + (2,2) or_A(x1,x2) = x1 + x2 + (1,2) precedence: not# = and = or partial status: pi(not#) = [1] pi(and) = [1, 2] pi(or) = [1] The next rules are strictly ordered: p4 We remove them from the problem. -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: not#(and(x,y)) -> not#(x) p2: not#(or(x,y)) -> not#(y) p3: not#(or(x,y)) -> not#(x) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The estimated dependency graph contains the following SCCs: {p1, p2, p3} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: not#(and(x,y)) -> not#(x) p2: not#(or(x,y)) -> not#(x) p3: not#(or(x,y)) -> not#(y) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The set of usable rules consists of (no rules) Take the reduction pair: weighted path order base order: matrix interpretations: carrier: N^2 order: lexicographic order interpretations: not#_A(x1) = ((1,0),(0,0)) x1 and_A(x1,x2) = x1 + x2 + (1,1) or_A(x1,x2) = ((1,0),(0,0)) x1 + ((1,0),(0,0)) x2 + (1,1) precedence: and = or > not# partial status: pi(not#) = [] pi(and) = [2] pi(or) = [] The next rules are strictly ordered: p1 We remove them from the problem. -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: not#(or(x,y)) -> not#(x) p2: not#(or(x,y)) -> not#(y) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The estimated dependency graph contains the following SCCs: {p1, p2} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: not#(or(x,y)) -> not#(x) p2: not#(or(x,y)) -> not#(y) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The set of usable rules consists of (no rules) Take the reduction pair: weighted path order base order: matrix interpretations: carrier: N^2 order: lexicographic order interpretations: not#_A(x1) = ((1,0),(0,0)) x1 or_A(x1,x2) = ((1,0),(1,0)) x1 + x2 + (1,1) precedence: or > not# partial status: pi(not#) = [] pi(or) = [2] The next rules are strictly ordered: p1 We remove them from the problem. -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: not#(or(x,y)) -> not#(y) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The estimated dependency graph contains the following SCCs: {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: not#(or(x,y)) -> not#(y) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The set of usable rules consists of (no rules) Take the reduction pair: weighted path order base order: matrix interpretations: carrier: N^2 order: lexicographic order interpretations: not#_A(x1) = ((1,0),(1,1)) x1 or_A(x1,x2) = x1 + ((1,0),(1,1)) x2 + (1,1) precedence: not# = or partial status: pi(not#) = [1] pi(or) = [2] The next rules are strictly ordered: p1 We remove them from the problem. Then no dependency pair remains. -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: and#(x,or(y,z)) -> and#(x,y) p2: and#(x,or(y,z)) -> and#(x,z) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The set of usable rules consists of (no rules) Take the reduction pair: weighted path order base order: matrix interpretations: carrier: N^2 order: lexicographic order interpretations: and#_A(x1,x2) = x2 + (1,1) or_A(x1,x2) = ((1,0),(0,0)) x1 + x2 + (2,2) precedence: and# = or partial status: pi(and#) = [2] pi(or) = [2] The next rules are strictly ordered: p1 We remove them from the problem. -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: and#(x,or(y,z)) -> and#(x,z) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The estimated dependency graph contains the following SCCs: {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: and#(x,or(y,z)) -> and#(x,z) and R consists of: r1: not(and(x,y)) -> or(not(x),not(y)) r2: not(or(x,y)) -> and(not(x),not(y)) r3: and(x,or(y,z)) -> or(and(x,y),and(x,z)) The set of usable rules consists of (no rules) Take the reduction pair: weighted path order base order: matrix interpretations: carrier: N^2 order: lexicographic order interpretations: and#_A(x1,x2) = ((1,0),(1,0)) x2 + (1,0) or_A(x1,x2) = ((1,0),(0,0)) x1 + ((1,0),(1,0)) x2 + (1,0) precedence: or > and# partial status: pi(and#) = [] pi(or) = [] The next rules are strictly ordered: p1 We remove them from the problem. Then no dependency pair remains.