0.00/0.34 NO 0.00/0.34 0.00/0.34 0.00/0.34 The system was reversed. 0.00/0.34 0.00/0.34 Remains to prove termination of the 4-rule system 0.00/0.34 { a -> , 0.00/0.34 b a -> a a c b , 0.00/0.34 c b -> , 0.00/0.34 c c -> b } 0.00/0.34 0.00/0.34 0.00/0.34 Loop of length 13 starting with a string of length 8 using right expansion 0.00/0.34 and the encoding {a=a, b=b, c=c}: 0.00/0.34 0.00/0.34 .ba.aaacaa 0.00/0.34 rule ba -> aacb at position 0 0.00/0.34 .aacb.aaacaa 0.00/0.34 rule ba -> aacb at position 3 0.00/0.34 .aacaacb.aacaa 0.00/0.34 rule a -> at position 3 0.00/0.34 .aacacb.aacaa 0.00/0.34 rule a -> at position 3 0.00/0.34 .aaccb.aacaa 0.00/0.34 rule cc -> b at position 2 0.00/0.34 .aabb.aacaa 0.00/0.34 rule ba -> aacb at position 3 0.00/0.34 .aabaacb.acaa 0.00/0.34 rule ba -> aacb at position 6 0.00/0.34 .aabaacaacb.caa 0.00/0.34 rule a -> at position 6 0.00/0.34 .aabaacacb.caa 0.00/0.34 rule a -> at position 6 0.00/0.34 .aabaaccb.caa 0.00/0.34 rule cb -> at position 6 0.00/0.34 .aabaac.caa 0.00/0.34 rule cc -> b at position 5 0.00/0.34 .aabaab.aa 0.00/0.34 rule ba -> aacb at position 5 0.00/0.34 .aabaaaacb.a 0.00/0.34 rule ba -> aacb at position 8 0.00/0.34 .aabaaaacaacb. 0.00/0.38 EOF