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(9,19), next(10,11), next(11,12), next(11,15), next(12,13), next(13,14), next(15,16), next(16,17), next(17,18), next(19,20), next(20,21), next(21,22), next(22,23), next(23,24), next(24,25), next(25,26), next(26,27), next(26,40), next(27,28), next(27,31), next(28,29), next(29,30), next(31,32), next(32,33), next(33,34), next(34,35), next(35,36), next(36,37), next(37,38), next(38,39), next(40,41), next(41,42), doAt(startflow,6), doAt(a15,8), doAt(a23,9), doAt(a11,10), doAt(a13,11), doAt(a17,12), doAt(endflow,13), doAt(endflow,17), doAt(endflow,29), doAt(endflow,38), doAt(endflow,41), doAt(a21,15), doAt(a24,16), doAt(a22,19), doAt(a18,20), doAt(a3,21), doAt(a2,22), doAt(a1,23), doAt(a16,25), doAt(a4,26), doAt(a7,27), doAt(a8,28), doAt(a25,31), doAt(a9,32), doAt(a20,33), doAt(a12,34), doAt(a5,35), doAt(a10,36), doAt(a6,37), doAt(a14,40), subsAt(a15,7), 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ineffset(a22,x12), ineffset(a22,x19), ineffset(a22,x20), ineffset(a18,x4), ineffset(a18,x15), ineffset(a18,x18), ineffset(a18,x20), ineffset(a3,x16), ineffset(a2,x4), ineffset(a2,x12), ineffset(a2,x17), ineffset(a2,x22), ineffset(a1,x18), ineffset(a16,x7), ineffset(a16,x11), ineffset(a16,x17), ineffset(a4,co8), ineffset(a4,co9), ineffset(a7,co14), ineffset(a7,co15), ineffset(a8,x5), ineffset(a8,x17), ineffset(a8,x18), ineffset(a25,x8), ineffset(a25,x11), ineffset(a25,x16), ineffset(a9,x7), ineffset(a9,x14), ineffset(a9,x21), ineffset(a20,x5), ineffset(a20,x13), ineffset(a20,x21), ineffset(a12,x11), ineffset(a12,x20), ineffset(a12,x22), ineffset(a12,x25), ineffset(a5,x19), ineffset(a10,x7), ineffset(a10,x16), ineffset(a10,x18), ineffset(a10,x20), ineffset(a6,x10), ineffset(a6,x14), ineffset(a6,x20), ineffset(a14,x2), ineffset(a14,x3), ineffset(a14,x4), ineffset(a14,x17), inreadset(a15,x13), inreadset(a15,x17), inreadset(a23,x4), inreadset(a23,x23), inreadset(a23,x24), inreadset(a11,x3), 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