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(5,6), next(6,7), next(7,8), next(8,9), 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(19,20), next(20,21), next(20,41), next(21,22), next(21,25), next(22,23), next(23,24), next(25,26), next(26,27), next(26,30), next(27,28), next(28,29), next(30,31), next(31,32), next(31,36), next(32,33), next(33,34), next(34,35), next(36,37), next(37,38), next(38,39), next(39,40), next(41,42), doAt(startflow,5), doAt(a22,7), doAt(a23,8), doAt(a6,10), doAt(a1,11), doAt(a13,12), doAt(a25,13), doAt(a19,14), doAt(a17,15), doAt(a4,16), doAt(a5,17), doAt(a21,18), doAt(a9,19), doAt(a3,20), doAt(a14,21), doAt(a16,22), doAt(endflow,23), doAt(endflow,28), doAt(endflow,34), doAt(endflow,39), doAt(endflow,41), doAt(a10,25), doAt(a7,26), doAt(a2,27), doAt(a18,30), doAt(a24,31), doAt(a20,32), doAt(a8,33), doAt(a8,38), doAt(a15,36), doAt(a12,37), 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