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(8,26), next(9,10), next(10,11), next(11,12), next(12,13), next(13,14), next(14,15), next(15,16), next(15,20), next(16,17), next(17,18), next(18,19), next(20,21), next(21,22), next(22,23), next(23,24), next(24,25), 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(38,54), next(39,40), next(40,41), next(41,42), next(41,47), next(42,43), next(43,44), next(44,45), next(45,46), next(47,48), next(48,49), next(49,50), next(50,51), next(51,52), next(52,53), next(54,55), next(55,56), next(56,57), next(56,61), next(57,58), next(58,59), next(59,60), next(61,62), next(62,63), next(63,64), next(64,65), next(65,66), doAt(startflow,6), doAt(a4,7), doAt(a18,8), doAt(a7,11), doAt(a21,13), doAt(a12,14), doAt(a12,40), doAt(a12,55), doAt(a5,15), doAt(a5,41), doAt(a5,56), doAt(a16,16), doAt(a16,42), doAt(a16,57), doAt(a24,17), doAt(a24,23), doAt(a24,43), doAt(a24,50), doAt(a24,58), doAt(a24,64), doAt(endflow,18), doAt(endflow,24), doAt(endflow,45), doAt(endflow,52), doAt(endflow,59), doAt(endflow,65), doAt(a17,20), doAt(a17,47), doAt(a17,61), doAt(a19,21), doAt(a19,48), doAt(a19,62), doAt(a1,22), doAt(a1,49), doAt(a1,63), doAt(a14,27), doAt(a2,29), doAt(a3,30), doAt(a10,31), doAt(a23,32), doAt(a8,33), doAt(a13,34), doAt(a9,35), doAt(a25,36), doAt(a6,37), doAt(a11,38), doAt(a22,39), doAt(a20,54), subsAt(a7,9), subsAt(a21,12), ineffset(startflow,x24), ineffset(startflow,x13), ineffset(startflow,x20), ineffset(startflow,x1), ineffset(startflow,x2), ineffset(startflow,x3), ineffset(startflow,x4), ineffset(startflow,x5), ineffset(startflow,x6), ineffset(startflow,x7), ineffset(startflow,x8), ineffset(startflow,x9), ineffset(startflow,x10), ineffset(startflow,x11), ineffset(startflow,x12), 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(a4,x11), ineffset(a18,co36), ineffset(a18,co37), ineffset(a7,x24), ineffset(a7,x13), ineffset(a7,x20), ineffset(a7,x25), ineffset(a21,x16), ineffset(a12,x7), ineffset(a12,x15), ineffset(a12,x17), ineffset(a12,x25), ineffset(a5,co10), ineffset(a5,co11), ineffset(a16,x2), ineffset(a16,x23), ineffset(a24,x1), ineffset(endflow,x5), ineffset(endflow,x8), ineffset(endflow,x9), ineffset(endflow,x11), ineffset(endflow,finished), ineffset(a17,x5), ineffset(a17,x17), ineffset(a19,x3), ineffset(a14,x4), ineffset(a14,x8), ineffset(a14,x14), ineffset(a14,x18), ineffset(a2,x13), ineffset(a2,x3), ineffset(a2,x19), ineffset(a2,x22), ineffset(a3,x16), ineffset(a3,x19), ineffset(a10,x13), ineffset(a10,x7), ineffset(a10,x9), ineffset(a23,x24), ineffset(a23,x14), ineffset(a23,x18), ineffset(a8,x12), ineffset(a8,x14), ineffset(a8,x25), ineffset(a13,x1), ineffset(a13,x4), ineffset(a13,x8), ineffset(a13,x18), ineffset(a9,x7), ineffset(a25,x25), ineffset(a6,x10), ineffset(a6,x17), ineffset(a6,x25), ineffset(a11,co22), ineffset(a11,co23), ineffset(a22,x21), ineffset(a20,x20), ineffset(a20,x8), ineffset(a20,x9), ineffset(a20,x15), inreadset(a4,x4), inreadset(a4,x7), inreadset(a4,x15), inreadset(a18,x3), inreadset(a7,x24), inreadset(a7,x10), inreadset(a21,x4), inreadset(a12,x10), inreadset(a12,x15), inreadset(a5,x24), inreadset(a5,x13), inreadset(a5,x4), inreadset(a16,x9), inreadset(a16,x10), inreadset(a24,x13), inreadset(a24,x4), inreadset(endflow,x24), inreadset(endflow,x13), inreadset(endflow,x20), 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,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(a17,x14), inreadset(a19,x3), inreadset(a19,x22), inreadset(a1,x22), inreadset(a14,x24), inreadset(a14,x17), inreadset(a14,x19), inreadset(a2,x13), inreadset(a3,x22), inreadset(a10,x24), inreadset(a10,x11), inreadset(a10,x14), inreadset(a23,x5), inreadset(a23,x8), inreadset(a8,x21), inreadset(a13,x21), inreadset(a13,x25), inreadset(a9,x2), inreadset(a9,x11), inreadset(a25,x8), inreadset(a6,x10), inreadset(a11,x6), inreadset(a11,x16), inreadset(a11,x19), inreadset(a22,x1), inreadset(a22,x8), inreadset(a20,x14), activity(startflow), activity(a4), activity(a18), activity(a7), activity(a21), activity(a12), activity(a5), activity(a16), activity(a24), activity(endflow), activity(a17), activity(a19), activity(a1), activity(a14), activity(a2), activity(a3), activity(a10), activity(a23), activity(a8), activity(a13), activity(a9), activity(a25), activity(a6), activity(a11), activity(a22), activity(a20), effectsObserved(startflow,1), effectsObserved(a4,2), effectsObserved(a18,3), effectsObserved(a7,4), effectsObserved(a21,5), do(startflow,1), do(a4,2), do(a18,3), do(a7,4), do(a21,5), nextvis(1,2), nextvis(2,3), nextvis(3,4), nextvis(4,5), subs(a7,9), subs(a21,12), do(a4,7), do(a7,11), do(a21,13), do(a12,14), impossible(a,40), impossible(a,55), do(a5,15), impossible(a,41), impossible(a,56), do(a16,16), impossible(a,42), impossible(a,57), do(a24,17), do(a24,23), impossible(a,43), impossible(a,50), impossible(a,58), impossible(a,64), do(endflow,18), do(endflow,24), impossible(a,45), impossible(a,52), impossible(a,59), impossible(a,65), do(a17,20), impossible(a,47), impossible(a,61), do(a19,21), impossible(a,48), impossible(a,62), impossible(a,49), impossible(a,63), impossible(a,27), 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,38), impossible(a,39), impossible(a,54), comp(a7,4,x24,10), impossible(a,26), impossible(a,28), impossible(a,44), impossible(a,51), impossible(a,60), impossible(a,46), impossible(a,66), impossible(a,53), nextvis(9,10), nextvis(10,11), nextvis(11,12), nextvis(12,13), nextvis(13,14), nextvis(14,15), nextvis(15,16), nextvis(15,20), nextvis(16,17), nextvis(17,18), nextvis(20,21), nextvis(23,24), nextvis(5,7), nextvis(7,9), nextvis(21,23), nextvis(18,19), nextvis(24,25)}