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(19,47), next(20,21), next(20,39), next(21,22), next(21,27), next(22,23), next(23,24), next(24,25), next(25,26), 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(39,40), next(40,41), next(41,42), next(42,43), next(43,44), next(44,45), next(45,46), next(47,48), next(48,49), next(49,50), doAt(startflow,9), doAt(a24,10), doAt(a7,13), doAt(a3,15), doAt(a23,16), doAt(a10,17), doAt(a18,18), doAt(a14,19), doAt(a19,20), doAt(a8,21), doAt(a22,22), doAt(a15,23), doAt(a15,35), doAt(a15,43), doAt(a15,47), doAt(a21,24), doAt(a21,36), doAt(a21,44), doAt(a21,48), doAt(endflow,25), doAt(endflow,37), doAt(endflow,45), doAt(endflow,49), doAt(a6,27), doAt(a25,28), doAt(a2,29), doAt(a13,30), doAt(a9,31), doAt(a5,32), doAt(a4,33), doAt(a12,34), doAt(a1,39), doAt(a17,40), doAt(a20,41), doAt(a11,42), ineffset(startflow,x7), ineffset(startflow,x17), ineffset(startflow,x1), ineffset(startflow,x2), ineffset(startflow,x3), ineffset(startflow,x4), ineffset(startflow,x5), ineffset(startflow,x6), ineffset(startflow,x8), ineffset(startflow,x9), ineffset(startflow,x10), ineffset(startflow,x11), ineffset(startflow,x12), ineffset(startflow,x13), ineffset(startflow,x14), ineffset(startflow,x15), ineffset(startflow,x16), ineffset(startflow,x18), ineffset(startflow,x19), ineffset(startflow,x20), ineffset(startflow,x21), ineffset(startflow,x22), ineffset(startflow,x23), ineffset(startflow,x24), ineffset(startflow,x25), ineffset(a24,x17), ineffset(a24,x3), ineffset(a24,x10), ineffset(a24,x12), ineffset(a7,x13), ineffset(a7,x19), ineffset(a3,x7), ineffset(a3,x17), ineffset(a3,x5), ineffset(a3,x23), ineffset(a23,x7), ineffset(a10,x9), ineffset(a10,x16), ineffset(a18,x3), ineffset(a18,x6), ineffset(a18,x10), ineffset(a14,co28), ineffset(a14,co29), ineffset(a19,co38), ineffset(a19,co39), ineffset(a8,co16), ineffset(a8,co17), ineffset(a22,x5), ineffset(a15,x4), ineffset(a15,x9), ineffset(a15,x22), ineffset(a21,x2), ineffset(a21,x8), ineffset(a21,x9), ineffset(a21,x20), ineffset(endflow,x12), ineffset(endflow,finished), ineffset(a6,x24), ineffset(a25,x17), ineffset(a25,x1), ineffset(a25,x5), ineffset(a25,x18), ineffset(a2,x7), ineffset(a2,x5), ineffset(a2,x18), ineffset(a13,x2), ineffset(a9,x21), ineffset(a5,x1), ineffset(a5,x5), ineffset(a5,x8), ineffset(a5,x11), ineffset(a4,x19), ineffset(a12,x15), ineffset(a12,x16), ineffset(a1,x10), ineffset(a17,x3), ineffset(a17,x8), ineffset(a17,x24), ineffset(a20,x9), ineffset(a20,x21), ineffset(a11,x7), activity(startflow), activity(a24), activity(a7), activity(a3), activity(a23), activity(a10), activity(a18), activity(a14), activity(a19), activity(a8), activity(a22), activity(a15), activity(a21), activity(endflow), activity(a6), activity(a25), activity(a2), activity(a13), activity(a9), activity(a5), activity(a4), activity(a12), activity(a1), activity(a17), activity(a20), activity(a11), effectsObserved(startflow,1), effectsObserved(a24,2), effectsObserved(a7,3), effectsObserved(a3,4), effectsObserved(a23,5), effectsObserved(a10,6), effectsObserved(a18,7), effectsObserved(a14,8), inreadset(a24,x21), inreadset(a7,x7), inreadset(a7,x8), inreadset(a7,x15), inreadset(a3,x17), inreadset(a3,x1), inreadset(a3,x13), inreadset(a23,x1), inreadset(a23,x8), inreadset(a23,x13), inreadset(a10,x4), inreadset(a10,x18), inreadset(a10,x20), inreadset(a18,x18), inreadset(a14,x12), inreadset(a19,x2), inreadset(a8,x5), inreadset(a22,x4), inreadset(a22,x6), inreadset(a22,x24), inreadset(a15,x7), inreadset(a21,x17), inreadset(a21,x4), inreadset(a21,x18), inreadset(endflow,x7), inreadset(endflow,x17), inreadset(endflow,x1), inreadset(endflow,x2), inreadset(endflow,x3), inreadset(endflow,x4), inreadset(endflow,x5), inreadset(endflow,x6), 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,x18), inreadset(endflow,x19), inreadset(endflow,x20), inreadset(endflow,x21), inreadset(endflow,x22), inreadset(endflow,x23), inreadset(endflow,x24), inreadset(endflow,x25), inreadset(endflow,co28), inreadset(endflow,co29), inreadset(endflow,co38), inreadset(endflow,co39), inreadset(endflow,co16), inreadset(endflow,co17), inreadset(endflow,finished), inreadset(a6,x16), inreadset(a25,x9), inreadset(a25,x12), inreadset(a25,x20), inreadset(a2,x12), inreadset(a13,x6), inreadset(a9,x3), inreadset(a9,x10), inreadset(a5,x21), inreadset(a4,x11), inreadset(a4,x21), inreadset(a12,x10), inreadset(a1,x4), inreadset(a1,x5), inreadset(a1,x23), inreadset(a17,x7), inreadset(a20,x7), inreadset(a11,x17), do(startflow,1), do(a24,2), do(a7,3), do(a3,4), do(a23,5), do(a10,6), do(a18,7), do(a14,8), nextvis(1,2), nextvis(2,3), nextvis(3,4), nextvis(4,5), nextvis(5,6), nextvis(6,7), nextvis(7,8), do(a19,20), do(a8,21), do(a22,22), do(a15,23), do(a15,35), do(a15,43), impossible(a,47), do(a21,24), do(a21,36), do(a21,44), impossible(a,48), do(endflow,25), do(endflow,37), do(endflow,45), impossible(a,49), do(a6,27), do(a25,28), do(a2,29), do(a13,30), do(a9,31), do(a5,32), do(a4,33), do(a12,34), do(a1,39), do(a17,40), do(a20,41), do(a11,42), impossible(a,50), nextvis(20,21), nextvis(20,39), nextvis(21,22), nextvis(21,27), nextvis(22,23), nextvis(23,24), nextvis(24,25), nextvis(27,28), nextvis(28,29), nextvis(29,30), nextvis(30,31), nextvis(31,32), nextvis(32,33), nextvis(33,34), nextvis(34,35), nextvis(35,36), nextvis(36,37), nextvis(39,40), nextvis(40,41), nextvis(41,42), nextvis(42,43), nextvis(43,44), nextvis(44,45), nextvis(8,20), nextvis(25,26), nextvis(37,38), nextvis(45,46)}