0.00/0.36 NO 0.00/0.36 0.00/0.36 0.00/0.36 The system was reversed. 0.00/0.36 0.00/0.36 Remains to prove termination of the 3-rule system 0.00/0.36 { a -> , 0.00/0.36 b a -> c b , 0.00/0.36 c c -> a a c a b } 0.00/0.36 0.00/0.36 0.00/0.36 Loop of length 13 starting with a string of length 6 using right expansion 0.00/0.36 and the encoding {a=a, b=b, c=c}: 0.00/0.36 0.00/0.36 .cc.aaaa 0.00/0.36 rule cc -> aacab at position 0 0.00/0.36 .aacab.aaaa 0.00/0.36 rule a -> at position 3 0.00/0.36 .aacb.aaaa 0.00/0.36 rule ba -> cb at position 3 0.00/0.36 .aaccb.aaa 0.00/0.36 rule ba -> cb at position 4 0.00/0.36 .aacccb.aa 0.00/0.36 rule ba -> cb at position 5 0.00/0.36 .aaccccb.a 0.00/0.36 rule ba -> cb at position 6 0.00/0.36 .aacccccb. 0.00/0.36 rule cc -> aacab at position 5 0.00/0.36 .aacccaacabb. 0.00/0.36 rule a -> at position 5 0.00/0.36 .aacccacabb. 0.00/0.36 rule a -> at position 5 0.00/0.36 .aaccccabb. 0.00/0.36 rule cc -> aacab at position 4 0.00/0.36 .aaccaacababb. 0.00/0.36 rule a -> at position 7 0.00/0.36 .aaccaacbabb. 0.00/0.36 rule ba -> cb at position 7 0.00/0.36 .aaccaaccbbb. 0.00/0.36 rule cc -> aacab at position 6 0.00/0.36 .aaccaaaacabbbb. 0.00/0.40 EOF