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