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(4,10), next(5,6), next(6,7), next(7,8), next(8,9), next(10,11), next(11,12), next(11,17), next(12,13), next(13,14), next(14,15), next(15,16), next(17,18), next(18,19), next(19,20), next(19,25), next(20,21), next(21,22), next(22,23), next(23,24), next(25,26), next(26,27), next(27,28), next(28,29), next(29,30), next(30,31), 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(39,40), next(40,41), doAt(startflow,3), doAt(a1,4), doAt(a25,5), doAt(a2,6), doAt(a2,13), doAt(a2,21), doAt(a2,38), doAt(a18,7), doAt(a18,14), doAt(a18,22), doAt(a18,39), doAt(endflow,8), doAt(endflow,15), doAt(endflow,23), doAt(endflow,40), doAt(a22,10), doAt(a16,11), doAt(a3,12), doAt(a6,17), doAt(a24,18), doAt(a10,19), doAt(a17,20), doAt(a14,25), doAt(a8,26), doAt(a21,27), doAt(a12,28), doAt(a11,29), doAt(a23,30), doAt(a7,31), doAt(a4,32), doAt(a19,33), doAt(a13,34), 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ineffset(a3,x14), ineffset(a6,x14), ineffset(a6,x20), ineffset(a6,x21), ineffset(a6,x24), ineffset(a24,x9), ineffset(a24,x16), ineffset(a10,co20), ineffset(a10,co21), ineffset(a17,x24), ineffset(a14,x17), ineffset(a14,x22), ineffset(a8,x4), ineffset(a8,x13), ineffset(a8,x18), ineffset(a8,x24), ineffset(a21,x3), ineffset(a21,x21), ineffset(a21,x22), ineffset(a21,x23), ineffset(a12,x18), ineffset(a11,x4), ineffset(a11,x9), ineffset(a11,x11), ineffset(a11,x23), ineffset(a23,x24), ineffset(a7,x13), ineffset(a7,x16), ineffset(a7,x20), ineffset(a4,x15), ineffset(a19,x2), ineffset(a19,x4), ineffset(a13,x5), ineffset(a13,x7), ineffset(a13,x25), ineffset(a15,x7), ineffset(a5,x1), ineffset(a9,x7), ineffset(a9,x16), ineffset(a9,x18), activity(startflow), activity(a1), activity(a25), activity(a2), activity(a18), activity(endflow), activity(a22), activity(a16), activity(a3), activity(a6), activity(a24), activity(a10), activity(a17), activity(a14), activity(a8), activity(a21), activity(a12), activity(a11), activity(a23), activity(a7), activity(a4), activity(a19), activity(a13), activity(a15), activity(a5), activity(a9), effectsObserved(startflow,1), effectsObserved(a1,2), inreadset(a1,x2), inreadset(a1,x14), inreadset(a25,x4), inreadset(a25,x10), inreadset(a25,x14), inreadset(a2,x2), inreadset(a2,x19), inreadset(a2,x22), inreadset(a18,x5), inreadset(a18,x24), inreadset(endflow,x1), inreadset(endflow,x2), inreadset(endflow,x3), inreadset(endflow,x4), inreadset(endflow,x5), inreadset(endflow,x6), inreadset(endflow,x7), inreadset(endflow,x8), inreadset(endflow,x9), inreadset(endflow,x10), inreadset(endflow,x11), inreadset(endflow,x12), inreadset(endflow,x13), inreadset(endflow,x14), inreadset(endflow,x15), inreadset(endflow,x16), inreadset(endflow,x17), inreadset(endflow,x18), inreadset(endflow,x19), inreadset(endflow,x20), inreadset(endflow,x21), inreadset(endflow,x22), inreadset(endflow,x23), inreadset(endflow,x24), inreadset(endflow,x25), inreadset(endflow,co2), inreadset(endflow,co3), inreadset(endflow,co32), inreadset(endflow,co33), inreadset(endflow,co20), inreadset(endflow,co21), inreadset(endflow,finished), inreadset(a22,x3), inreadset(a16,x15), inreadset(a16,x17), inreadset(a16,x19), inreadset(a3,x22), inreadset(a6,x9), inreadset(a24,x3), inreadset(a24,x4), inreadset(a10,x20), inreadset(a17,x9), inreadset(a14,x8), inreadset(a8,x12), inreadset(a8,x13), inreadset(a8,x14), inreadset(a21,x4), inreadset(a21,x9), inreadset(a21,x11), inreadset(a12,x14), inreadset(a11,x17), inreadset(a23,x11), inreadset(a7,x22), inreadset(a4,x19), inreadset(a4,x22), inreadset(a4,x25), inreadset(a19,x5), inreadset(a19,x17), inreadset(a13,x18), inreadset(a15,x5), inreadset(a15,x24), inreadset(a5,x1), inreadset(a5,x5), inreadset(a5,x11), inreadset(a9,x22), inreadset(a9,x25), do(startflow,1), do(a1,2), nextvis(1,2), do(a25,5), do(a2,6), impossible(a,13), impossible(a,21), impossible(a,38), do(a18,7), impossible(a,14), impossible(a,22), impossible(a,39), do(endflow,8), impossible(a,15), impossible(a,23), impossible(a,40), impossible(a,10), impossible(a,11), impossible(a,12), impossible(a,17), impossible(a,18), impossible(a,19), impossible(a,20), impossible(a,25), impossible(a,26), impossible(a,27), impossible(a,28), impossible(a,29), impossible(a,30), impossible(a,31), impossible(a,32), impossible(a,33), impossible(a,34), impossible(a,35), impossible(a,36), impossible(a,37), impossible(a,16), impossible(a,24), impossible(a,41), nextvis(5,6), nextvis(6,7), nextvis(7,8), nextvis(2,5), nextvis(8,9)}