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(7,12), next(8,9), next(9,10), next(10,11), next(12,13), next(13,14), next(14,15), next(15,16), next(15,21), next(16,17), next(17,18), next(18,19), next(19,20), next(21,22), next(22,23), next(23,24), next(24,25), next(24,29), next(25,26), next(26,27), next(27,28), next(29,30), 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(40,41), next(41,42), next(42,43), doAt(startflow,5), doAt(a17,6), doAt(a20,7), doAt(a10,8), doAt(a9,9), doAt(endflow,10), doAt(endflow,19), doAt(endflow,27), doAt(endflow,34), doAt(endflow,42), doAt(a3,12), doAt(a1,13), doAt(a2,14), doAt(a12,15), doAt(a4,16), doAt(a19,17), doAt(a5,21), doAt(a22,22), doAt(a15,23), doAt(a7,24), doAt(a21,25), doAt(a23,29), doAt(a13,30), doAt(a6,31), doAt(a8,32), doAt(a14,36), doAt(a18,37), doAt(a24,38), doAt(a25,39), doAt(a11,40), 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ineffset(endflow,x35), ineffset(endflow,finished), ineffset(a3,x28), ineffset(a3,x30), ineffset(a3,x31), ineffset(a3,x35), ineffset(a1,x3), ineffset(a1,x8), ineffset(a1,x29), ineffset(a2,x32), ineffset(a12,co24), ineffset(a12,co25), ineffset(a4,x29), ineffset(a19,x6), ineffset(a5,x2), ineffset(a5,x11), ineffset(a5,x20), ineffset(a5,x21), ineffset(a22,x10), ineffset(a22,x13), ineffset(a22,x21), ineffset(a15,x8), ineffset(a15,x23), ineffset(a7,co14), ineffset(a7,co15), ineffset(a21,x12), ineffset(a21,x25), ineffset(a21,x27), ineffset(a21,x30), ineffset(a23,x14), ineffset(a23,x21), ineffset(a23,x25), ineffset(a23,x29), ineffset(a13,x5), ineffset(a13,x26), ineffset(a6,co12), ineffset(a6,co13), ineffset(a8,x14), ineffset(a14,x2), ineffset(a14,x4), ineffset(a14,x12), ineffset(a14,x23), ineffset(a18,x14), ineffset(a24,x26), ineffset(a25,x7), ineffset(a11,x6), ineffset(a11,x8), ineffset(a11,x18), ineffset(a11,x19), inreadset(a17,x6), inreadset(a17,x22), inreadset(a20,x5), inreadset(a10,x29), 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effectsObserved(a17,2), effectsObserved(a20,3), effectsObserved(a10,4), do(startflow,1), do(a17,2), do(a20,3), do(a10,4), nextvis(1,2), nextvis(2,3), nextvis(3,4), do(a9,9), do(endflow,10), impossible(a,19), impossible(a,27), impossible(a,34), impossible(a,42), impossible(a,12), impossible(a,13), impossible(a,14), impossible(a,15), impossible(a,16), impossible(a,17), impossible(a,21), impossible(a,22), impossible(a,23), impossible(a,24), impossible(a,25), impossible(a,29), impossible(a,30), impossible(a,31), impossible(a,32), impossible(a,36), impossible(a,37), impossible(a,38), impossible(a,39), impossible(a,40), impossible(a,18), impossible(a,26), impossible(a,33), impossible(a,41), impossible(a,20), impossible(a,28), impossible(a,35), impossible(a,43), nextvis(9,10), nextvis(4,9), nextvis(10,11)}