(ignored inputs)COMMENT submitted by: Johannes Waldmann Rewrite Rules: [ c(b(?x)) -> c(a(?x)), b(c(?x)) -> c(b(?x)), a(b(?x)) -> c(c(?x)), a(a(?x)) -> a(b(?x)), a(c(?x)) -> a(a(?x)), c(c(?x)) -> a(a(?x)), a(a(?x)) -> b(c(?x)), b(b(?x)) -> c(b(?x)) ] Apply Direct Methods... Inner CPs: [ c(c(b(?x_1))) = c(a(c(?x_1))), c(c(b(?x_7))) = c(a(b(?x_7))), b(c(a(?x))) = c(b(b(?x))), b(a(a(?x_5))) = c(b(c(?x_5))), a(c(b(?x_1))) = c(c(c(?x_1))), a(c(b(?x_7))) = c(c(b(?x_7))), a(c(c(?x_2))) = a(b(b(?x_2))), a(a(a(?x_4))) = a(b(c(?x_4))), a(b(c(?x_6))) = a(b(a(?x_6))), a(c(a(?x))) = a(a(b(?x))), a(a(a(?x_5))) = a(a(c(?x_5))), c(c(a(?x))) = a(a(b(?x))), a(c(c(?x_2))) = b(c(b(?x_2))), a(a(b(?x_3))) = b(c(a(?x_3))), a(a(a(?x_4))) = b(c(c(?x_4))), b(c(b(?x_1))) = c(b(c(?x_1))), a(a(b(?x))) = a(b(a(?x))), c(a(a(?x))) = a(a(c(?x))), a(b(c(?x))) = b(c(a(?x))), b(c(b(?x))) = c(b(b(?x))) ] Outer CPs: [ a(b(?x_3)) = b(c(?x_3)) ] not Overlay, check Termination... unknown/not Terminating unknown Knuth & Bendix Linear unknown Development Closed unknown Strongly Closed unknown Weakly-Non-Overlapping & Non-Collapsing & Shallow unknown Upside-Parallel-Closed/Outside-Closed (inner) Parallel CPs: (not computed) unknown Toyama (Parallel CPs) Simultaneous CPs: [ c(c(b(?x_2))) = c(a(c(?x_2))), c(c(b(?x_8))) = c(a(b(?x_8))), c(b(c(b(?x_2)))) = b(c(a(c(?x_2)))), c(b(c(b(?x_8)))) = b(c(a(b(?x_8)))), a(a(c(b(?x_2)))) = a(c(a(c(?x_2)))), a(a(c(b(?x_8)))) = a(c(a(b(?x_8)))), a(a(c(b(?x_2)))) = c(c(a(c(?x_2)))), a(a(c(b(?x_8)))) = c(c(a(b(?x_8)))), c(b(b(?x))) = b(c(a(?x))), a(a(b(?x))) = a(c(a(?x))), a(a(b(?x))) = c(c(a(?x))), b(c(a(?x_2))) = c(b(b(?x_2))), b(a(a(?x_6))) = c(b(c(?x_6))), c(a(c(a(?x_2)))) = c(c(b(b(?x_2)))), c(a(a(a(?x_6)))) = c(c(b(c(?x_6)))), c(c(c(a(?x_2)))) = a(c(b(b(?x_2)))), c(c(a(a(?x_6)))) = a(c(b(c(?x_6)))), c(b(c(a(?x_2)))) = b(c(b(b(?x_2)))), c(b(a(a(?x_6)))) = b(c(b(c(?x_6)))), c(a(c(?x))) = c(c(b(?x))), c(c(c(?x))) = a(c(b(?x))), c(b(c(?x))) = b(c(b(?x))), a(c(b(?x_3))) = c(c(c(?x_3))), a(c(b(?x_8))) = c(c(b(?x_8))), a(b(c(b(?x_3)))) = a(c(c(c(?x_3)))), a(b(c(b(?x_8)))) = a(c(c(b(?x_8)))), b(c(c(b(?x_3)))) = a(c(c(c(?x_3)))), b(c(c(b(?x_8)))) = a(c(c(b(?x_8)))), a(b(b(?x))) = a(c(c(?x))), b(c(b(?x))) = a(c(c(?x))), b(c(?x)) = a(b(?x)), a(a(b(?x_1))) = a(b(a(?x_1))), a(c(c(?x_4))) = a(b(b(?x_4))), a(a(a(?x_5))) = a(b(c(?x_5))), a(b(c(?x_7))) = a(b(a(?x_7))), a(b(a(b(?x_1)))) = a(a(b(a(?x_1)))), a(b(c(c(?x_4)))) = a(a(b(b(?x_4)))), a(b(a(a(?x_5)))) = a(a(b(c(?x_5)))), a(b(b(c(?x_7)))) = a(a(b(a(?x_7)))), b(c(a(b(?x_1)))) = a(a(b(a(?x_1)))), b(c(c(c(?x_4)))) = a(a(b(b(?x_4)))), b(c(a(a(?x_5)))) = a(a(b(c(?x_5)))), b(c(b(c(?x_7)))) = a(a(b(a(?x_7)))), a(b(a(?x))) = a(a(b(?x))), b(c(a(?x))) = a(a(b(?x))), a(c(a(?x_2))) = a(a(b(?x_2))), a(a(a(?x_6))) = a(a(c(?x_6))), a(b(c(a(?x_2)))) = a(a(a(b(?x_2)))), a(b(a(a(?x_6)))) = a(a(a(c(?x_6)))), b(c(c(a(?x_2)))) = a(a(a(b(?x_2)))), b(c(a(a(?x_6)))) = a(a(a(c(?x_6)))), a(b(c(?x))) = a(a(a(?x))), b(c(c(?x))) = a(a(a(?x))), c(a(a(?x_1))) = a(a(c(?x_1))), c(c(a(?x_2))) = a(a(b(?x_2))), a(a(a(a(?x_1)))) = c(a(a(c(?x_1)))), a(a(c(a(?x_2)))) = c(a(a(b(?x_2)))), c(b(a(a(?x_1)))) = b(a(a(c(?x_1)))), c(b(c(a(?x_2)))) = b(a(a(b(?x_2)))), a(a(a(a(?x_1)))) = a(a(a(c(?x_1)))), a(a(c(a(?x_2)))) = a(a(a(b(?x_2)))), a(a(c(?x))) = c(a(a(?x))), c(b(c(?x))) = b(a(a(?x))), a(a(c(?x))) = a(a(a(?x))), a(b(?x)) = b(c(?x)), a(b(c(?x_1))) = b(c(a(?x_1))), a(c(c(?x_4))) = b(c(b(?x_4))), a(a(b(?x_5))) = b(c(a(?x_5))), a(a(a(?x_6))) = b(c(c(?x_6))), b(c(b(c(?x_1)))) = a(b(c(a(?x_1)))), b(c(c(c(?x_4)))) = a(b(c(b(?x_4)))), b(c(a(b(?x_5)))) = a(b(c(a(?x_5)))), b(c(a(a(?x_6)))) = a(b(c(c(?x_6)))), a(b(b(c(?x_1)))) = a(b(c(a(?x_1)))), a(b(c(c(?x_4)))) = a(b(c(b(?x_4)))), a(b(a(b(?x_5)))) = a(b(c(a(?x_5)))), a(b(a(a(?x_6)))) = a(b(c(c(?x_6)))), b(c(a(?x))) = a(b(c(?x))), a(b(a(?x))) = a(b(c(?x))), b(c(b(?x_1))) = c(b(b(?x_1))), b(c(b(?x_3))) = c(b(c(?x_3))), c(b(c(b(?x_1)))) = b(c(b(b(?x_1)))), c(b(c(b(?x_3)))) = b(c(b(c(?x_3)))), c(a(c(b(?x_1)))) = c(c(b(b(?x_1)))), c(a(c(b(?x_3)))) = c(c(b(c(?x_3)))), c(c(c(b(?x_1)))) = a(c(b(b(?x_1)))), c(c(c(b(?x_3)))) = a(c(b(c(?x_3)))), c(b(b(?x))) = b(c(b(?x))), c(a(b(?x))) = c(c(b(?x))), c(c(b(?x))) = a(c(b(?x))) ] unknown Okui (Simultaneous CPs) unknown Strongly Depth-Preserving & Root-E-Closed/Non-E-Overlapping unknown Strongly Weight-Preserving & Root-E-Closed/Non-E-Overlapping check Locally Decreasing Diagrams by Rule Labelling... Critical Pair by Rules <1, 0> preceded by [(c,1)] joinable by a reduction of rules <[], [([(c,1)],4),([(c,1)],6),([(c,1)],1)]> Critical Pair by Rules <7, 0> preceded by [(c,1)] joinable by a reduction of rules <[([],5),([(a,1)],2),([],4)], [([(c,1)],2),([],5)]> joinable by a reduction of rules <[([(c,1)],0),([],5)], [([(c,1)],2),([],5),([(a,1)],4)]> joinable by a reduction of rules <[([(c,1)],0),([],5),([(a,1)],6)], [([(c,1)],2),([],5),([],3)]> joinable by a reduction of rules <[([],5),([(a,1)],2),([(a,1)],5)], [([(c,1)],2),([],5),([(a,1)],4)]> Critical Pair by Rules <0, 1> preceded by [(b,1)] joinable by a reduction of rules <[([],1),([],0),([(c,1)],3)], [([],0)]> joinable by a reduction of rules <[([],1),([],0)], [([],0),([(c,1)],2),([(c,1)],5)]> Critical Pair by Rules <5, 1> preceded by [(b,1)] joinable by a reduction of rules <[([(b,1)],6),([],7)], []> Critical Pair by Rules <1, 2> preceded by [(a,1)] joinable by a reduction of rules <[([(a,1)],0),([],4)], [([],5),([(a,1)],4)]> Critical Pair by Rules <7, 2> preceded by [(a,1)] joinable by a reduction of rules <[([],4)], [([],5)]> Critical Pair by Rules <2, 3> preceded by [(a,1)] joinable by a reduction of rules <[([(a,1)],5),([(a,1)],3)], [([(a,1)],7),([],4)]> joinable by a reduction of rules <[([(a,1)],5),([(a,1)],3)], [([],2),([],5)]> Critical Pair by Rules <4, 3> preceded by [(a,1)] joinable by a reduction of rules <[([(a,1)],6)], []> Critical Pair by Rules <6, 3> preceded by [(a,1)] joinable by a reduction of rules <[([(a,1)],1),([(a,1)],0),([],4)], [([],2),([],5)]> joinable by a reduction of rules <[([],2),([],5),([(a,1)],4)], [([],2),([],5)]> joinable by a reduction of rules <[], [([],2),([],5),([(a,1)],6)]> joinable by a reduction of rules <[([(a,1)],1),([],4)], [([],2),([],5),([(a,1)],3)]> Critical Pair by Rules <0, 4> preceded by [(a,1)] joinable by a reduction of rules <[([],4),([(a,1)],3)], []> joinable by a reduction of rules <[([],4)], [([(a,1)],2),([(a,1)],5)]> joinable by a reduction of rules <[([],4),([],6)], [([],6),([(b,1)],0)]> Critical Pair by Rules <5, 4> preceded by [(a,1)] joinable by a reduction of rules <[], [([(a,1)],4)]> joinable by a reduction of rules <[([(a,1)],6)], [([],3)]> Critical Pair by Rules <0, 5> preceded by [(c,1)] joinable by a reduction of rules <[([],5),([(a,1)],3)], []> joinable by a reduction of rules <[([],5)], [([(a,1)],2),([(a,1)],5)]> joinable by a reduction of rules <[([],5),([],6)], [([],6),([(b,1)],0)]> Critical Pair by Rules <2, 6> preceded by [(a,1)] joinable by a reduction of rules <[([(a,1)],5),([],6)], [([(b,1)],0)]> Critical Pair by Rules <3, 6> preceded by [(a,1)] joinable by a reduction of rules <[([],6),([(b,1)],0)], []> Critical Pair by Rules <4, 6> preceded by [(a,1)] joinable by a reduction of rules <[([(a,1)],3),([],3),([],2)], [([],1),([(c,1)],1)]> joinable by a reduction of rules <[([(a,1)],3)], [([],1),([(c,1)],1),([],5)]> joinable by a reduction of rules <[([(a,1)],3),([],6)], [([(b,1)],5),([(b,1)],6),([(b,1)],1)]> joinable by a reduction of rules <[([],3),([],2)], [([],1),([(c,1)],1),([(c,1)],0)]> joinable by a reduction of rules <[([(a,1)],6),([(a,1)],1),([],4)], [([],1),([(c,1)],1),([],5)]> joinable by a reduction of rules <[([(a,1)],6),([],2),([(c,1)],5)], [([],1),([],0),([(c,1)],4)]> joinable by a reduction of rules <[([],6),([],1),([],0)], [([],1),([],0),([(c,1)],4)]> Critical Pair by Rules <1, 7> preceded by [(b,1)] joinable by a reduction of rules <[([],1),([(c,1)],7)], [([(c,1)],1)]> Critical Pair by Rules <3, 3> preceded by [(a,1)] joinable by a reduction of rules <[([(a,1)],2),([(a,1)],5)], [([],2),([],5)]> Critical Pair by Rules <5, 5> preceded by [(c,1)] joinable by a reduction of rules <[([(c,1)],6)], [([],6),([],1)]> joinable by a reduction of rules <[([(c,1)],3),([(c,1)],2)], [([],3),([],2)]> Critical Pair by Rules <6, 6> preceded by [(a,1)] joinable by a reduction of rules <[([],2),([(c,1)],5)], [([],1),([],0)]> Critical Pair by Rules <7, 7> preceded by [(b,1)] joinable by a reduction of rules <[([],1)], []> Critical Pair by Rules <6, 3> preceded by [] joinable by a reduction of rules <[], [([],2),([],5),([],6)]> unknown Diagram Decreasing check Non-Confluence... obtain 16 rules by 3 steps unfolding obtain 100 candidates for checking non-joinability check by TCAP-Approximation (failure) check by Ordering(rpo), check by Tree-Automata Approximation (failure) check by Interpretation(mod2) (failure) check by Descendants-Approximation, check by Ordering(poly) (failure) unknown Non-Confluence unknown Huet (modulo AC) check by Reduction-Preserving Completion... failure(empty P) unknown Reduction-Preserving Completion Direct Methods: Can't judge Try Persistent Decomposition for... [ c(b(?x)) -> c(a(?x)), b(c(?x)) -> c(b(?x)), a(b(?x)) -> c(c(?x)), a(a(?x)) -> a(b(?x)), a(c(?x)) -> a(a(?x)), c(c(?x)) -> a(a(?x)), a(a(?x)) -> b(c(?x)), b(b(?x)) -> c(b(?x)) ] Sort Assignment: a : 15=>15 b : 15=>15 c : 15=>15 maximal types: {15} Persistent Decomposition failed: Can't judge Try Layer Preserving Decomposition for... [ c(b(?x)) -> c(a(?x)), b(c(?x)) -> c(b(?x)), a(b(?x)) -> c(c(?x)), a(a(?x)) -> a(b(?x)), a(c(?x)) -> a(a(?x)), c(c(?x)) -> a(a(?x)), a(a(?x)) -> b(c(?x)), b(b(?x)) -> c(b(?x)) ] Layer Preserving Decomposition failed: Can't judge Try Commutative Decomposition for... [ c(b(?x)) -> c(a(?x)), b(c(?x)) -> c(b(?x)), a(b(?x)) -> c(c(?x)), a(a(?x)) -> a(b(?x)), a(c(?x)) -> a(a(?x)), c(c(?x)) -> a(a(?x)), a(a(?x)) -> b(c(?x)), b(b(?x)) -> c(b(?x)) ] Outside Critical Pair: by Rules <6, 3> develop reducts from lhs term... <{1}, c(b(?x_6))> <{}, b(c(?x_6))> develop reducts from rhs term... <{2}, c(c(?x_6))> <{}, a(b(?x_6))> Inside Critical Pair: by Rules <1, 0> develop reducts from lhs term... <{5}, a(a(b(?x_1)))> <{0}, c(c(a(?x_1)))> <{}, c(c(b(?x_1)))> develop reducts from rhs term... <{4}, c(a(a(?x_1)))> <{}, c(a(c(?x_1)))> Inside Critical Pair: by Rules <7, 0> develop reducts from lhs term... <{5}, a(a(b(?x_7)))> <{0}, c(c(a(?x_7)))> <{}, c(c(b(?x_7)))> develop reducts from rhs term... <{2}, c(c(c(?x_7)))> <{}, c(a(b(?x_7)))> Inside Critical Pair: by Rules <0, 1> develop reducts from lhs term... <{1}, c(b(a(?x)))> <{}, b(c(a(?x)))> develop reducts from rhs term... <{0}, c(a(b(?x)))> <{7}, c(c(b(?x)))> <{}, c(b(b(?x)))> Inside Critical Pair: by Rules <5, 1> develop reducts from lhs term... <{6}, b(b(c(?x_5)))> <{3}, b(a(b(?x_5)))> <{}, b(a(a(?x_5)))> develop reducts from rhs term... <{0}, c(a(c(?x_5)))> <{1}, c(c(b(?x_5)))> <{}, c(b(c(?x_5)))> Inside Critical Pair: by Rules <1, 2> develop reducts from lhs term... <{4}, a(a(b(?x_1)))> <{0}, a(c(a(?x_1)))> <{}, a(c(b(?x_1)))> develop reducts from rhs term... <{5}, a(a(c(?x_1)))> <{5}, c(a(a(?x_1)))> <{}, c(c(c(?x_1)))> Inside Critical Pair: by Rules <7, 2> develop reducts from lhs term... <{4}, a(a(b(?x_7)))> <{0}, a(c(a(?x_7)))> <{}, a(c(b(?x_7)))> develop reducts from rhs term... <{5}, a(a(b(?x_7)))> <{0}, c(c(a(?x_7)))> <{}, c(c(b(?x_7)))> Inside Critical Pair: by Rules <2, 3> develop reducts from lhs term... <{4}, a(a(c(?x_2)))> <{5}, a(a(a(?x_2)))> <{}, a(c(c(?x_2)))> develop reducts from rhs term... <{2}, c(c(b(?x_2)))> <{7}, a(c(b(?x_2)))> <{}, a(b(b(?x_2)))> Inside Critical Pair: by Rules <4, 3> develop reducts from lhs term... <{6}, b(c(a(?x_4)))> <{3}, a(b(a(?x_4)))> <{6}, a(b(c(?x_4)))> <{3}, a(a(b(?x_4)))> <{}, a(a(a(?x_4)))> develop reducts from rhs term... <{2}, c(c(c(?x_4)))> <{1}, a(c(b(?x_4)))> <{}, a(b(c(?x_4)))> Inside Critical Pair: by Rules <6, 3> develop reducts from lhs term... <{2}, c(c(c(?x_6)))> <{1}, a(c(b(?x_6)))> <{}, a(b(c(?x_6)))> develop reducts from rhs term... <{2}, c(c(a(?x_6)))> <{}, a(b(a(?x_6)))> Inside Critical Pair: by Rules <0, 4> develop reducts from lhs term... <{4}, a(a(a(?x)))> <{}, a(c(a(?x)))> develop reducts from rhs term... <{6}, b(c(b(?x)))> <{3}, a(b(b(?x)))> <{2}, a(c(c(?x)))> <{}, a(a(b(?x)))> Inside Critical Pair: by Rules <5, 4> develop reducts from lhs term... <{6}, b(c(a(?x_5)))> <{3}, a(b(a(?x_5)))> <{6}, a(b(c(?x_5)))> <{3}, a(a(b(?x_5)))> <{}, a(a(a(?x_5)))> develop reducts from rhs term... <{6}, b(c(c(?x_5)))> <{3}, a(b(c(?x_5)))> <{4}, a(a(a(?x_5)))> <{}, a(a(c(?x_5)))> Inside Critical Pair: by Rules <0, 5> develop reducts from lhs term... <{5}, a(a(a(?x)))> <{}, c(c(a(?x)))> develop reducts from rhs term... <{6}, b(c(b(?x)))> <{3}, a(b(b(?x)))> <{2}, a(c(c(?x)))> <{}, a(a(b(?x)))> Inside Critical Pair: by Rules <2, 6> develop reducts from lhs term... <{4}, a(a(c(?x_2)))> <{5}, a(a(a(?x_2)))> <{}, a(c(c(?x_2)))> develop reducts from rhs term... <{1}, c(b(b(?x_2)))> <{0}, b(c(a(?x_2)))> <{}, b(c(b(?x_2)))> Inside Critical Pair: by Rules <3, 6> develop reducts from lhs term... <{6}, b(c(b(?x_3)))> <{3}, a(b(b(?x_3)))> <{2}, a(c(c(?x_3)))> <{}, a(a(b(?x_3)))> develop reducts from rhs term... <{1}, c(b(a(?x_3)))> <{}, b(c(a(?x_3)))> Inside Critical Pair: by Rules <4, 6> develop reducts from lhs term... <{6}, b(c(a(?x_4)))> <{3}, a(b(a(?x_4)))> <{6}, a(b(c(?x_4)))> <{3}, a(a(b(?x_4)))> <{}, a(a(a(?x_4)))> develop reducts from rhs term... <{1}, c(b(c(?x_4)))> <{5}, b(a(a(?x_4)))> <{}, b(c(c(?x_4)))> Inside Critical Pair: by Rules <1, 7> develop reducts from lhs term... <{1}, c(b(b(?x_1)))> <{0}, b(c(a(?x_1)))> <{}, b(c(b(?x_1)))> develop reducts from rhs term... <{0}, c(a(c(?x_1)))> <{1}, c(c(b(?x_1)))> <{}, c(b(c(?x_1)))> Commutative Decomposition failed: Can't judge No further decomposition possible Combined result: Can't judge 1007.trs: Failure(unknown CR) MAYBE (5359 msec.)