0.00/0.28 NO 0.00/0.28 0.00/0.28 0.00/0.28 The system was reversed. 0.00/0.28 0.00/0.28 Remains to prove termination of the 4-rule system 0.00/0.28 { a -> , 0.00/0.28 b a -> a a b c a b , 0.00/0.28 b -> , 0.00/0.28 c c -> } 0.00/0.28 0.00/0.28 0.00/0.28 Loop of length 8 starting with a string of length 4 using right expansion 0.00/0.28 and the encoding {a=a, b=b, c=c}: 0.00/0.28 0.00/0.28 .ba.aa 0.00/0.28 rule ba -> aabcab at position 0 0.00/0.28 .aabcab.aa 0.00/0.28 rule a -> at position 4 0.00/0.28 .aabcb.aa 0.00/0.28 rule ba -> aabcab at position 4 0.00/0.28 .aabcaabcab.a 0.00/0.28 rule a -> at position 4 0.00/0.28 .aabcabcab.a 0.00/0.28 rule a -> at position 4 0.00/0.28 .aabcbcab.a 0.00/0.28 rule b -> at position 4 0.00/0.28 .aabccab.a 0.00/0.28 rule cc -> at position 3 0.00/0.28 .aabab.a 0.00/0.28 rule ba -> aabcab at position 4 0.00/0.28 .aabaaabcab. 0.00/0.31 EOF