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(10,17), next(11,12), next(12,13), next(13,14), next(14,15), next(15,16), next(17,18), next(18,19), next(18,48), next(19,20), next(20,21), next(21,22), next(22,23), next(23,24), next(24,25), next(24,30), next(25,26), next(26,27), next(27,28), next(28,29), 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(39,44), next(40,41), next(41,42), next(42,43), next(44,45), next(45,46), next(46,47), next(48,49), next(49,50), next(50,51), next(51,52), next(52,53), next(53,54), next(53,60), next(54,55), next(55,56), next(56,57), next(57,58), next(58,59), next(60,61), next(61,62), next(62,63), next(63,64), next(64,65), next(65,66), next(66,67), next(67,68), next(68,69), next(69,70), next(70,71), next(70,75), next(71,72), next(72,73), next(73,74), next(75,76), next(76,77), next(77,78), doAt(startflow,6), doAt(a2,8), doAt(a12,10), doAt(a4,13), doAt(a19,14), doAt(a19,26), doAt(a19,41), doAt(a19,45), doAt(a19,55), doAt(a19,72), doAt(a19,76), doAt(endflow,15), doAt(endflow,28), doAt(endflow,42), doAt(endflow,46), doAt(endflow,58), doAt(endflow,73), doAt(endflow,77), doAt(a15,18), doAt(a22,20), doAt(a23,21), doAt(a23,50), doAt(a17,22), doAt(a17,51), doAt(a1,23), doAt(a1,52), doAt(a9,24), doAt(a9,53), doAt(a8,25), doAt(a8,54), doAt(a6,30), doAt(a6,60), doAt(a11,31), doAt(a11,61), doAt(a21,33), doAt(a21,63), doAt(a20,34), doAt(a20,64), doAt(a13,35), doAt(a13,65), doAt(a10,36), doAt(a10,66), doAt(a24,37), doAt(a24,67), doAt(a5,38), doAt(a5,69), doAt(a18,39), doAt(a18,70), doAt(a3,40), doAt(a3,71), doAt(a16,44), doAt(a16,75), doAt(a25,48), doAt(a14,49), subsAt(a2,7), subsAt(a4,11), ineffset(startflow,x20), ineffset(startflow,x24), ineffset(startflow,x10), ineffset(startflow,x5), ineffset(startflow,x1), ineffset(startflow,x2), ineffset(startflow,x3), ineffset(startflow,x4), ineffset(startflow,x6), ineffset(startflow,x7), ineffset(startflow,x8), ineffset(startflow,x9), ineffset(startflow,x11), ineffset(startflow,x12), ineffset(startflow,x13), ineffset(startflow,x14), ineffset(startflow,x15), ineffset(startflow,x16), ineffset(startflow,x17), ineffset(startflow,x18), ineffset(startflow,x19), ineffset(startflow,x21), ineffset(startflow,x22), ineffset(startflow,x23), ineffset(startflow,x25), ineffset(a2,x15), ineffset(a12,co24), ineffset(a12,co25), ineffset(a4,x20), ineffset(a4,x24), ineffset(a4,x5), ineffset(a4,x15), ineffset(a19,x10), ineffset(endflow,x1), ineffset(endflow,x16), ineffset(endflow,x18), ineffset(endflow,x22), ineffset(endflow,finished), ineffset(a15,co30), ineffset(a15,co31), ineffset(a22,x24), ineffset(a22,x1), ineffset(a22,x8), ineffset(a22,x14), ineffset(a23,x1), ineffset(a23,x6), ineffset(a23,x7), ineffset(a23,x14), ineffset(a17,x8), ineffset(a1,x9), ineffset(a1,x11), ineffset(a1,x15), ineffset(a9,co18), ineffset(a9,co19), ineffset(a8,x13), ineffset(a6,x20), ineffset(a6,x1), ineffset(a6,x12), ineffset(a6,x13), ineffset(a11,x2), ineffset(a21,x22), ineffset(a20,x7), ineffset(a20,x8), ineffset(a20,x16), ineffset(a20,x23), ineffset(a13,x20), ineffset(a13,x3), ineffset(a13,x15), ineffset(a13,x22), ineffset(a10,x4), ineffset(a10,x17), ineffset(a24,x12), ineffset(a24,x13), ineffset(a24,x17), ineffset(a24,x22), ineffset(a5,x4), ineffset(a18,co36), ineffset(a18,co37), ineffset(a3,x3), ineffset(a3,x11), ineffset(a3,x21), ineffset(a25,x3), ineffset(a25,x17), ineffset(a25,x25), ineffset(a14,x6), ineffset(a14,x9), activity(startflow), activity(a2), activity(a12), activity(a4), activity(a19), activity(endflow), activity(a15), activity(a22), activity(a23), activity(a17), activity(a1), activity(a9), activity(a8), activity(a6), activity(a11), activity(a21), activity(a20), activity(a13), activity(a10), activity(a24), activity(a5), activity(a18), activity(a3), activity(a16), activity(a25), activity(a14), effectsObserved(startflow,1), effectsObserved(a2,2), effectsObserved(a12,3), effectsObserved(a4,4), effectsObserved(a19,5), inreadset(a2,x6), inreadset(a12,x20), inreadset(a12,x16), inreadset(a4,x24), inreadset(a4,x21), inreadset(a19,x11), inreadset(endflow,x20), inreadset(endflow,x24), inreadset(endflow,x10), inreadset(endflow,x5), inreadset(endflow,x1), inreadset(endflow,x2), inreadset(endflow,x3), inreadset(endflow,x4), inreadset(endflow,x6), inreadset(endflow,x7), inreadset(endflow,x8), inreadset(endflow,x9), 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,x21), inreadset(endflow,x22), inreadset(endflow,x23), inreadset(endflow,x25), inreadset(endflow,co24), inreadset(endflow,co25), inreadset(endflow,co30), inreadset(endflow,co31), inreadset(endflow,co18), inreadset(endflow,co19), inreadset(endflow,co36), inreadset(endflow,co37), inreadset(endflow,finished), inreadset(a15,x10), inreadset(a22,x24), inreadset(a23,x6), inreadset(a23,x23), inreadset(a17,x4), inreadset(a1,x19), inreadset(a9,x6), inreadset(a8,x21), inreadset(a8,x25), inreadset(a6,x6), inreadset(a6,x16), inreadset(a11,x7), inreadset(a11,x15), inreadset(a21,x5), inreadset(a21,x4), inreadset(a21,x15), inreadset(a20,x5), inreadset(a13,x4), inreadset(a13,x19), inreadset(a10,x20), inreadset(a10,x8), inreadset(a24,x25), inreadset(a5,x20), inreadset(a5,x24), inreadset(a5,x11), inreadset(a18,x3), inreadset(a18,x14), inreadset(a18,x17), inreadset(a3,x20), inreadset(a16,x25), inreadset(a25,x3), inreadset(a25,x21), inreadset(a14,x12), do(startflow,1), do(a2,2), do(a12,3), do(a4,4), do(a19,5), nextvis(1,2), nextvis(2,3), nextvis(3,4), nextvis(4,5), subs(a4,11), do(a4,13), do(a19,14), impossible(a,26), impossible(a,41), impossible(a,45), impossible(a,55), impossible(a,72), impossible(a,76), do(endflow,15), impossible(a,28), impossible(a,42), impossible(a,46), impossible(a,58), impossible(a,73), impossible(a,77), impossible(a,18), impossible(a,20), impossible(a,21), impossible(a,50), impossible(a,22), impossible(a,51), impossible(a,23), impossible(a,52), impossible(a,24), impossible(a,53), impossible(a,25), impossible(a,54), impossible(a,30), impossible(a,60), impossible(a,31), impossible(a,61), impossible(a,33), impossible(a,63), impossible(a,34), impossible(a,64), impossible(a,35), impossible(a,65), impossible(a,36), impossible(a,66), impossible(a,37), impossible(a,67), impossible(a,38), impossible(a,69), impossible(a,39), impossible(a,70), impossible(a,40), impossible(a,71), impossible(a,44), impossible(a,75), impossible(a,48), impossible(a,49), comp(a4,4,x20,9), comp(a4,4,x24,12), impossible(a,19), impossible(a,57), impossible(a,68), impossible(a,27), impossible(a,32), impossible(a,56), impossible(a,62), impossible(a,17), impossible(a,29), impossible(a,59), impossible(a,43), impossible(a,47), impossible(a,74), impossible(a,78), nextvis(11,12), nextvis(12,13), nextvis(13,14), nextvis(14,15), nextvis(5,9), nextvis(9,11), nextvis(15,16)}