0.00/0.49 NO 0.00/0.49 0.00/0.49 0.00/0.49 The system was reversed. 0.00/0.49 0.00/0.49 Remains to prove termination of the 4-rule system 0.00/0.49 { a -> , 0.00/0.49 a a a -> b , 0.00/0.49 c b -> b c a c , 0.00/0.49 c -> } 0.00/0.49 0.00/0.49 0.00/0.49 Loop of length 12 starting with a string of length 5 using right expansion 0.00/0.49 and the encoding {a=a, b=b, c=c}: 0.00/0.49 0.00/0.49 .cb.bba 0.00/0.49 rule cb -> bcac at position 0 0.00/0.49 .bcac.bba 0.00/0.49 rule a -> at position 2 0.00/0.49 .bcc.bba 0.00/0.49 rule cb -> bcac at position 2 0.00/0.49 .bcbcac.ba 0.00/0.49 rule a -> at position 4 0.00/0.49 .bcbcc.ba 0.00/0.49 rule cb -> bcac at position 4 0.00/0.49 .bcbcbcac.a 0.00/0.49 rule cb -> bcac at position 3 0.00/0.49 .bcbbcaccac.a 0.00/0.49 rule c -> at position 6 0.00/0.49 .bcbbcacac.a 0.00/0.49 rule c -> at position 6 0.00/0.49 .bcbbcaac.a 0.00/0.49 rule c -> at position 7 0.00/0.49 .bcbbcaa.a 0.00/0.49 rule aaa -> b at position 5 0.00/0.49 .bcbbcb. 0.00/0.49 rule cb -> bcac at position 4 0.00/0.49 .bcbbbcac. 0.00/0.49 rule c -> at position 5 0.00/0.49 .bcbbbac. 1.32/0.55 EOF