DLV [build BEN/Oct 11 2007   gcc 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)]

true is bravely true, evidenced by {next(1,2), next(2,3), next(3,4), next(4,5), next(4,9), next(5,6), next(6,7), next(7,8), next(9,10), next(10,11), next(11,12), next(12,13), next(13,14), next(14,15), next(15,16), next(16,17), next(17,18), next(18,19), next(18,37), next(19,20), next(19,24), next(20,21), next(21,22), next(22,23), next(24,25), next(25,26), next(26,27), next(26,31), next(27,28), next(28,29), next(29,30), next(31,32), next(32,33), next(33,34), next(34,35), next(35,36), next(37,38), next(38,39), next(39,40), next(40,41), doAt(startflow,3), doAt(a7,4), doAt(a9,5), doAt(a21,6), doAt(a21,21), doAt(a21,28), doAt(a21,34), doAt(a21,39), doAt(endflow,7), doAt(endflow,22), doAt(endflow,29), doAt(endflow,35), doAt(endflow,40), doAt(a22,9), doAt(a11,10), doAt(a14,11), doAt(a4,12), doAt(a12,13), doAt(a8,14), doAt(a17,15), doAt(a2,16), doAt(a5,17), doAt(a23,18), doAt(a15,19), doAt(a25,20), doAt(a1,24), doAt(a10,25), doAt(a24,26), doAt(a16,27), doAt(a6,31), doAt(a3,32), doAt(a13,33), 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