YES After renaming modulo { a->0, b->1, c->2 }, it remains to prove termination of the 4-rule system { 0 -> , 0 1 -> 2 1 , 1 -> 0 0 2 , 2 2 -> 1 } Applying sparse 2-tiling [Hofbauer/Geser/Waldmann, FSCD 2019]. After renaming modulo { (0,0)->0, (0,1)->1, (0,2)->2, (1,0)->3, (1,1)->4, (1,2)->5, (2,0)->6, (2,1)->7, (2,2)->8, (3,0)->9, (3,1)->10, (3,2)->11, (1,4)->12, (2,4)->13 }, it remains to prove termination of the 60-rule system { 0 0 -> 0 , 0 1 -> 1 , 0 2 -> 2 , 3 0 -> 3 , 3 1 -> 4 , 3 2 -> 5 , 6 0 -> 6 , 6 1 -> 7 , 6 2 -> 8 , 9 0 -> 9 , 9 1 -> 10 , 9 2 -> 11 , 0 1 3 -> 2 7 3 , 0 1 4 -> 2 7 4 , 0 1 5 -> 2 7 5 , 0 1 12 -> 2 7 12 , 3 1 3 -> 5 7 3 , 3 1 4 -> 5 7 4 , 3 1 5 -> 5 7 5 , 3 1 12 -> 5 7 12 , 6 1 3 -> 8 7 3 , 6 1 4 -> 8 7 4 , 6 1 5 -> 8 7 5 , 6 1 12 -> 8 7 12 , 9 1 3 -> 11 7 3 , 9 1 4 -> 11 7 4 , 9 1 5 -> 11 7 5 , 9 1 12 -> 11 7 12 , 1 3 -> 0 0 2 6 , 1 4 -> 0 0 2 7 , 1 5 -> 0 0 2 8 , 1 12 -> 0 0 2 13 , 4 3 -> 3 0 2 6 , 4 4 -> 3 0 2 7 , 4 5 -> 3 0 2 8 , 4 12 -> 3 0 2 13 , 7 3 -> 6 0 2 6 , 7 4 -> 6 0 2 7 , 7 5 -> 6 0 2 8 , 7 12 -> 6 0 2 13 , 10 3 -> 9 0 2 6 , 10 4 -> 9 0 2 7 , 10 5 -> 9 0 2 8 , 10 12 -> 9 0 2 13 , 2 8 6 -> 1 3 , 2 8 7 -> 1 4 , 2 8 8 -> 1 5 , 2 8 13 -> 1 12 , 5 8 6 -> 4 3 , 5 8 7 -> 4 4 , 5 8 8 -> 4 5 , 5 8 13 -> 4 12 , 8 8 6 -> 7 3 , 8 8 7 -> 7 4 , 8 8 8 -> 7 5 , 8 8 13 -> 7 12 , 11 8 6 -> 10 3 , 11 8 7 -> 10 4 , 11 8 8 -> 10 5 , 11 8 13 -> 10 12 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 2: 0 is interpreted by / \ | 1 0 | | 0 1 | \ / 1 is interpreted by / \ | 1 4 | | 0 1 | \ / 2 is interpreted by / \ | 1 1 | | 0 1 | \ / 3 is interpreted by / \ | 1 2 | | 0 1 | \ / 4 is interpreted by / \ | 1 3 | | 0 1 | \ / 5 is interpreted by / \ | 1 3 | | 0 1 | \ / 6 is interpreted by / \ | 1 2 | | 0 1 | \ / 7 is interpreted by / \ | 1 3 | | 0 1 | \ / 8 is interpreted by / \ | 1 3 | | 0 1 | \ / 9 is interpreted by / \ | 1 0 | | 0 1 | \ / 10 is interpreted by / \ | 1 2 | | 0 1 | \ / 11 is interpreted by / \ | 1 0 | | 0 1 | \ / 12 is interpreted by / \ | 1 0 | | 0 1 | \ / 13 is interpreted by / \ | 1 0 | | 0 1 | \ / After renaming modulo { 0->0, 1->1, 2->2, 3->3, 5->4, 6->5, 8->6, 9->7, 7->8, 4->9, 12->10, 13->11 }, it remains to prove termination of the 32-rule system { 0 0 -> 0 , 0 1 -> 1 , 0 2 -> 2 , 3 0 -> 3 , 3 2 -> 4 , 5 0 -> 5 , 5 2 -> 6 , 7 0 -> 7 , 0 1 3 -> 2 8 3 , 0 1 9 -> 2 8 9 , 0 1 4 -> 2 8 4 , 0 1 10 -> 2 8 10 , 3 1 3 -> 4 8 3 , 3 1 9 -> 4 8 9 , 3 1 4 -> 4 8 4 , 3 1 10 -> 4 8 10 , 5 1 3 -> 6 8 3 , 5 1 9 -> 6 8 9 , 5 1 4 -> 6 8 4 , 5 1 10 -> 6 8 10 , 9 3 -> 3 0 2 5 , 9 9 -> 3 0 2 8 , 9 4 -> 3 0 2 6 , 9 10 -> 3 0 2 11 , 8 3 -> 5 0 2 5 , 8 9 -> 5 0 2 8 , 8 4 -> 5 0 2 6 , 8 10 -> 5 0 2 11 , 2 6 5 -> 1 3 , 2 6 8 -> 1 9 , 2 6 6 -> 1 4 , 2 6 11 -> 1 10 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 3: 0 is interpreted by / \ | 1 0 1 | | 0 1 0 | | 0 1 0 | \ / 1 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 2 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 3 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 4 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 5 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 6 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 7 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 8 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 9 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 10 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 11 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / After renaming modulo { 0->0, 1->1, 2->2, 3->3, 4->4, 5->5, 6->6, 7->7, 8->8, 9->9, 10->10, 11->11 }, it remains to prove termination of the 31-rule system { 0 1 -> 1 , 0 2 -> 2 , 3 0 -> 3 , 3 2 -> 4 , 5 0 -> 5 , 5 2 -> 6 , 7 0 -> 7 , 0 1 3 -> 2 8 3 , 0 1 9 -> 2 8 9 , 0 1 4 -> 2 8 4 , 0 1 10 -> 2 8 10 , 3 1 3 -> 4 8 3 , 3 1 9 -> 4 8 9 , 3 1 4 -> 4 8 4 , 3 1 10 -> 4 8 10 , 5 1 3 -> 6 8 3 , 5 1 9 -> 6 8 9 , 5 1 4 -> 6 8 4 , 5 1 10 -> 6 8 10 , 9 3 -> 3 0 2 5 , 9 9 -> 3 0 2 8 , 9 4 -> 3 0 2 6 , 9 10 -> 3 0 2 11 , 8 3 -> 5 0 2 5 , 8 9 -> 5 0 2 8 , 8 4 -> 5 0 2 6 , 8 10 -> 5 0 2 11 , 2 6 5 -> 1 3 , 2 6 8 -> 1 9 , 2 6 6 -> 1 4 , 2 6 11 -> 1 10 } Applying the dependency pairs transformation. After renaming modulo { (0,true)->0, (2,false)->1, (2,true)->2, (3,true)->3, (0,false)->4, (5,true)->5, (7,true)->6, (1,false)->7, (3,false)->8, (8,false)->9, (8,true)->10, (9,false)->11, (9,true)->12, (4,false)->13, (10,false)->14, (5,false)->15, (6,false)->16, (11,false)->17, (7,false)->18 }, it remains to prove termination of the 87-rule system { 0 1 -> 2 , 3 4 -> 3 , 5 4 -> 5 , 6 4 -> 6 , 0 7 8 -> 2 9 8 , 0 7 8 -> 10 8 , 0 7 8 -> 3 , 0 7 11 -> 2 9 11 , 0 7 11 -> 10 11 , 0 7 11 -> 12 , 0 7 13 -> 2 9 13 , 0 7 13 -> 10 13 , 0 7 14 -> 2 9 14 , 0 7 14 -> 10 14 , 3 7 8 -> 10 8 , 3 7 8 -> 3 , 3 7 11 -> 10 11 , 3 7 11 -> 12 , 3 7 13 -> 10 13 , 3 7 14 -> 10 14 , 5 7 8 -> 10 8 , 5 7 8 -> 3 , 5 7 11 -> 10 11 , 5 7 11 -> 12 , 5 7 13 -> 10 13 , 5 7 14 -> 10 14 , 12 8 -> 3 4 1 15 , 12 8 -> 0 1 15 , 12 8 -> 2 15 , 12 8 -> 5 , 12 11 -> 3 4 1 9 , 12 11 -> 0 1 9 , 12 11 -> 2 9 , 12 11 -> 10 , 12 13 -> 3 4 1 16 , 12 13 -> 0 1 16 , 12 13 -> 2 16 , 12 14 -> 3 4 1 17 , 12 14 -> 0 1 17 , 12 14 -> 2 17 , 10 8 -> 5 4 1 15 , 10 8 -> 0 1 15 , 10 8 -> 2 15 , 10 8 -> 5 , 10 11 -> 5 4 1 9 , 10 11 -> 0 1 9 , 10 11 -> 2 9 , 10 11 -> 10 , 10 13 -> 5 4 1 16 , 10 13 -> 0 1 16 , 10 13 -> 2 16 , 10 14 -> 5 4 1 17 , 10 14 -> 0 1 17 , 10 14 -> 2 17 , 2 16 15 -> 3 , 2 16 9 -> 12 , 4 7 ->= 7 , 4 1 ->= 1 , 8 4 ->= 8 , 8 1 ->= 13 , 15 4 ->= 15 , 15 1 ->= 16 , 18 4 ->= 18 , 4 7 8 ->= 1 9 8 , 4 7 11 ->= 1 9 11 , 4 7 13 ->= 1 9 13 , 4 7 14 ->= 1 9 14 , 8 7 8 ->= 13 9 8 , 8 7 11 ->= 13 9 11 , 8 7 13 ->= 13 9 13 , 8 7 14 ->= 13 9 14 , 15 7 8 ->= 16 9 8 , 15 7 11 ->= 16 9 11 , 15 7 13 ->= 16 9 13 , 15 7 14 ->= 16 9 14 , 11 8 ->= 8 4 1 15 , 11 11 ->= 8 4 1 9 , 11 13 ->= 8 4 1 16 , 11 14 ->= 8 4 1 17 , 9 8 ->= 15 4 1 15 , 9 11 ->= 15 4 1 9 , 9 13 ->= 15 4 1 16 , 9 14 ->= 15 4 1 17 , 1 16 15 ->= 7 8 , 1 16 9 ->= 7 11 , 1 16 16 ->= 7 13 , 1 16 17 ->= 7 14 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 2: 0 is interpreted by / \ | 1 0 | | 0 1 | \ / 1 is interpreted by / \ | 1 1 | | 0 1 | \ / 2 is interpreted by / \ | 1 0 | | 0 1 | \ / 3 is interpreted by / \ | 1 1 | | 0 1 | \ / 4 is interpreted by / \ | 1 0 | | 0 1 | \ / 5 is interpreted by / \ | 1 0 | | 0 1 | \ / 6 is interpreted by / \ | 1 0 | | 0 1 | \ / 7 is interpreted by / \ | 1 1 | | 0 1 | \ / 8 is interpreted by / \ | 1 3 | | 0 1 | \ / 9 is interpreted by / \ | 1 0 | | 0 1 | \ / 10 is interpreted by / \ | 1 0 | | 0 1 | \ / 11 is interpreted by / \ | 1 2 | | 0 1 | \ / 12 is interpreted by / \ | 1 1 | | 0 1 | \ / 13 is interpreted by / \ | 1 4 | | 0 1 | \ / 14 is interpreted by / \ | 1 2 | | 0 1 | \ / 15 is interpreted by / \ | 1 1 | | 0 1 | \ / 16 is interpreted by / \ | 1 2 | | 0 1 | \ / 17 is interpreted by / \ | 1 0 | | 0 1 | \ / 18 is interpreted by / \ | 1 0 | | 0 1 | \ / After renaming modulo { 3->0, 4->1, 5->2, 6->3, 7->4, 1->5, 8->6, 13->7, 15->8, 16->9, 18->10, 9->11, 11->12, 14->13, 17->14 }, it remains to prove termination of the 34-rule system { 0 1 -> 0 , 2 1 -> 2 , 3 1 -> 3 , 1 4 ->= 4 , 1 5 ->= 5 , 6 1 ->= 6 , 6 5 ->= 7 , 8 1 ->= 8 , 8 5 ->= 9 , 10 1 ->= 10 , 1 4 6 ->= 5 11 6 , 1 4 12 ->= 5 11 12 , 1 4 7 ->= 5 11 7 , 1 4 13 ->= 5 11 13 , 6 4 6 ->= 7 11 6 , 6 4 12 ->= 7 11 12 , 6 4 7 ->= 7 11 7 , 6 4 13 ->= 7 11 13 , 8 4 6 ->= 9 11 6 , 8 4 12 ->= 9 11 12 , 8 4 7 ->= 9 11 7 , 8 4 13 ->= 9 11 13 , 12 6 ->= 6 1 5 8 , 12 12 ->= 6 1 5 11 , 12 7 ->= 6 1 5 9 , 12 13 ->= 6 1 5 14 , 11 6 ->= 8 1 5 8 , 11 12 ->= 8 1 5 11 , 11 7 ->= 8 1 5 9 , 11 13 ->= 8 1 5 14 , 5 9 8 ->= 4 6 , 5 9 11 ->= 4 12 , 5 9 9 ->= 4 7 , 5 9 14 ->= 4 13 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 3: 0 is interpreted by / \ | 1 0 1 | | 0 1 0 | | 0 0 0 | \ / 1 is interpreted by / \ | 1 0 1 | | 0 1 0 | | 0 1 0 | \ / 2 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 3 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 4 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 5 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 6 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 7 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 8 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 9 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 10 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 11 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 12 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 13 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 14 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / After renaming modulo { 2->0, 1->1, 3->2, 4->3, 5->4, 6->5, 7->6, 8->7, 9->8, 10->9, 11->10, 12->11, 13->12, 14->13 }, it remains to prove termination of the 33-rule system { 0 1 -> 0 , 2 1 -> 2 , 1 3 ->= 3 , 1 4 ->= 4 , 5 1 ->= 5 , 5 4 ->= 6 , 7 1 ->= 7 , 7 4 ->= 8 , 9 1 ->= 9 , 1 3 5 ->= 4 10 5 , 1 3 11 ->= 4 10 11 , 1 3 6 ->= 4 10 6 , 1 3 12 ->= 4 10 12 , 5 3 5 ->= 6 10 5 , 5 3 11 ->= 6 10 11 , 5 3 6 ->= 6 10 6 , 5 3 12 ->= 6 10 12 , 7 3 5 ->= 8 10 5 , 7 3 11 ->= 8 10 11 , 7 3 6 ->= 8 10 6 , 7 3 12 ->= 8 10 12 , 11 5 ->= 5 1 4 7 , 11 11 ->= 5 1 4 10 , 11 6 ->= 5 1 4 8 , 11 12 ->= 5 1 4 13 , 10 5 ->= 7 1 4 7 , 10 11 ->= 7 1 4 10 , 10 6 ->= 7 1 4 8 , 10 12 ->= 7 1 4 13 , 4 8 7 ->= 3 5 , 4 8 10 ->= 3 11 , 4 8 8 ->= 3 6 , 4 8 13 ->= 3 12 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 3: 0 is interpreted by / \ | 1 0 1 | | 0 1 0 | | 0 0 0 | \ / 1 is interpreted by / \ | 1 0 1 | | 0 1 0 | | 0 1 0 | \ / 2 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 3 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 4 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 5 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 6 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 7 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 8 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 9 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 10 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 11 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 12 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 13 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / After renaming modulo { 2->0, 1->1, 3->2, 4->3, 5->4, 6->5, 7->6, 8->7, 9->8, 10->9, 11->10, 12->11, 13->12 }, it remains to prove termination of the 32-rule system { 0 1 -> 0 , 1 2 ->= 2 , 1 3 ->= 3 , 4 1 ->= 4 , 4 3 ->= 5 , 6 1 ->= 6 , 6 3 ->= 7 , 8 1 ->= 8 , 1 2 4 ->= 3 9 4 , 1 2 10 ->= 3 9 10 , 1 2 5 ->= 3 9 5 , 1 2 11 ->= 3 9 11 , 4 2 4 ->= 5 9 4 , 4 2 10 ->= 5 9 10 , 4 2 5 ->= 5 9 5 , 4 2 11 ->= 5 9 11 , 6 2 4 ->= 7 9 4 , 6 2 10 ->= 7 9 10 , 6 2 5 ->= 7 9 5 , 6 2 11 ->= 7 9 11 , 10 4 ->= 4 1 3 6 , 10 10 ->= 4 1 3 9 , 10 5 ->= 4 1 3 7 , 10 11 ->= 4 1 3 12 , 9 4 ->= 6 1 3 6 , 9 10 ->= 6 1 3 9 , 9 5 ->= 6 1 3 7 , 9 11 ->= 6 1 3 12 , 3 7 6 ->= 2 4 , 3 7 9 ->= 2 10 , 3 7 7 ->= 2 5 , 3 7 12 ->= 2 11 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 3: 0 is interpreted by / \ | 1 0 1 | | 0 1 0 | | 0 0 0 | \ / 1 is interpreted by / \ | 1 0 1 | | 0 1 0 | | 0 1 0 | \ / 2 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 3 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 4 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 5 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 6 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 7 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 8 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 9 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 10 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 11 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / 12 is interpreted by / \ | 1 0 0 | | 0 1 0 | | 0 0 0 | \ / After renaming modulo { 1->0, 2->1, 3->2, 4->3, 5->4, 6->5, 7->6, 8->7, 9->8, 10->9, 11->10, 12->11 }, it remains to prove termination of the 31-rule system { 0 1 ->= 1 , 0 2 ->= 2 , 3 0 ->= 3 , 3 2 ->= 4 , 5 0 ->= 5 , 5 2 ->= 6 , 7 0 ->= 7 , 0 1 3 ->= 2 8 3 , 0 1 9 ->= 2 8 9 , 0 1 4 ->= 2 8 4 , 0 1 10 ->= 2 8 10 , 3 1 3 ->= 4 8 3 , 3 1 9 ->= 4 8 9 , 3 1 4 ->= 4 8 4 , 3 1 10 ->= 4 8 10 , 5 1 3 ->= 6 8 3 , 5 1 9 ->= 6 8 9 , 5 1 4 ->= 6 8 4 , 5 1 10 ->= 6 8 10 , 9 3 ->= 3 0 2 5 , 9 9 ->= 3 0 2 8 , 9 4 ->= 3 0 2 6 , 9 10 ->= 3 0 2 11 , 8 3 ->= 5 0 2 5 , 8 9 ->= 5 0 2 8 , 8 4 ->= 5 0 2 6 , 8 10 ->= 5 0 2 11 , 2 6 5 ->= 1 3 , 2 6 8 ->= 1 9 , 2 6 6 ->= 1 4 , 2 6 11 ->= 1 10 } The system is trivially terminating.