0.00/0.29 NO 0.00/0.29 0.00/0.29 0.00/0.29 The system was reversed. 0.00/0.29 0.00/0.29 Remains to prove termination of the 4-rule system 0.00/0.29 { a -> , 0.00/0.29 b a -> , 0.00/0.29 b a -> a a c b , 0.00/0.29 c c -> b } 0.00/0.29 0.00/0.29 0.00/0.29 Loop of length 10 starting with a string of length 8 using right expansion 0.00/0.29 and the encoding {a=a, b=b, c=c}: 0.00/0.29 0.00/0.29 .ba.aaacaa 0.00/0.29 rule ba -> aacb at position 0 0.00/0.29 .aacb.aaacaa 0.00/0.29 rule ba -> aacb at position 3 0.00/0.29 .aacaacb.aacaa 0.00/0.29 rule a -> at position 3 0.00/0.29 .aacacb.aacaa 0.00/0.29 rule a -> at position 3 0.00/0.29 .aaccb.aacaa 0.00/0.29 rule cc -> b at position 2 0.00/0.29 .aabb.aacaa 0.00/0.29 rule ba -> aacb at position 3 0.00/0.29 .aabaacb.acaa 0.00/0.29 rule ba -> at position 6 0.00/0.29 .aabaac.caa 0.00/0.29 rule cc -> b at position 5 0.00/0.29 .aabaab.aa 0.00/0.29 rule ba -> aacb at position 5 0.00/0.29 .aabaaaacb.a 0.00/0.29 rule ba -> aacb at position 8 0.00/0.29 .aabaaaacaacb. 0.00/0.34 EOF