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(6,10), next(7,8), next(8,9), next(10,11), next(11,12), next(12,13), next(13,14), next(14,15), next(14,18), next(15,16), next(16,17), next(18,19), next(19,20), next(19,23), next(20,21), next(21,22), next(23,24), next(23,28), next(24,25), next(25,26), next(26,27), next(28,29), next(29,30), next(30,31), next(30,35), next(31,32), next(32,33), next(33,34), next(35,36), next(36,37), next(37,38), next(38,39), next(39,40), next(40,41), doAt(startflow,3), doAt(a7,4), doAt(a21,5), doAt(a8,6), doAt(a9,7), doAt(endflow,8), doAt(endflow,16), doAt(endflow,21), doAt(endflow,26), doAt(endflow,33), doAt(endflow,40), doAt(a2,10), doAt(a16,11), doAt(a18,12), doAt(a10,13), doAt(a23,14), doAt(a1,15), doAt(a6,18), doAt(a15,19), doAt(a11,20), doAt(a5,23), doAt(a20,24), doAt(a4,25), doAt(a4,32), doAt(a4,39), doAt(a14,28), doAt(a12,29), doAt(a17,30), doAt(a3,31), doAt(a24,35), doAt(a25,36), doAt(a19,37), 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