YES After renaming modulo { a->0, b->1, c->2 }, it remains to prove termination of the 3-rule system { 0 0 1 1 -> 1 1 1 0 0 0 , 0 2 -> 2 0 , 1 2 -> 2 1 } The system was reversed. After renaming modulo { 1->0, 0->1, 2->2 }, it remains to prove termination of the 3-rule system { 0 0 1 1 -> 1 1 1 0 0 0 , 2 1 -> 1 2 , 2 0 -> 0 2 } Applying sparse 2-untiling [Hofbauer/Geser/Waldmann, FSCD 2019]. After renaming modulo { 0->0, 1->1 }, it remains to prove termination of the 1-rule system { 0 0 1 1 -> 1 1 1 0 0 0 } Applying the dependency pairs transformation. After renaming modulo { (0,true)->0, (0,false)->1, (1,false)->2 }, it remains to prove termination of the 4-rule system { 0 1 2 2 -> 0 1 1 , 0 1 2 2 -> 0 1 , 0 1 2 2 -> 0 , 1 1 2 2 ->= 2 2 2 1 1 1 } The system was filtered by the following matrix interpretation of type E_J with J = {1,...,2} and dimension 5: 0 is interpreted by / \ | 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 | \ / 1 is interpreted by / \ | 1 0 0 0 0 | | 0 1 0 0 0 | | 0 0 0 1 0 | | 0 0 1 0 0 | | 0 0 2 0 0 | \ / 2 is interpreted by / \ | 1 0 0 0 0 | | 0 1 0 0 0 | | 0 0 0 0 0 | | 0 0 0 0 1 | | 0 1 2 1 0 | \ / After renaming modulo { 1->0, 2->1 }, it remains to prove termination of the 1-rule system { 0 0 1 1 ->= 1 1 1 0 0 0 } The system is trivially terminating.