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(5,10), next(6,7), next(7,8), next(8,9), 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(20,21), next(20,24), next(21,22), next(22,23), next(24,25), next(24,39), next(25,26), next(25,29), next(26,27), next(27,28), 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), doAt(startflow,4), doAt(a24,5), doAt(a13,7), doAt(endflow,8), doAt(endflow,22), doAt(endflow,27), doAt(endflow,37), doAt(endflow,39), doAt(a21,10), doAt(a1,12), doAt(a2,13), doAt(a12,14), doAt(a19,15), doAt(a14,16), doAt(a10,17), doAt(a9,18), doAt(a18,19), doAt(a4,20), doAt(a15,21), doAt(a16,24), doAt(a3,25), doAt(a11,26), doAt(a17,29), doAt(a20,30), doAt(a25,31), doAt(a6,32), doAt(a22,33), doAt(a7,34), doAt(a8,35), doAt(a23,36), subsAt(a13,6), ineffset(startflow,x2), ineffset(startflow,x1), 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,x13), ineffset(startflow,x14), ineffset(startflow,x15), ineffset(startflow,x16), ineffset(startflow,x17), 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,co48), ineffset(a24,co49), ineffset(a13,x2), ineffset(endflow,x8), ineffset(endflow,x13), ineffset(endflow,finished), ineffset(a21,x21), ineffset(a21,x25), ineffset(a1,x5), ineffset(a1,x7), ineffset(a1,x9), ineffset(a2,x8), ineffset(a2,x12), ineffset(a2,x25), ineffset(a12,x6), ineffset(a12,x12), ineffset(a12,x23), ineffset(a19,x1), ineffset(a19,x7), ineffset(a14,x1), ineffset(a14,x6), ineffset(a14,x12), ineffset(a14,x21), ineffset(a10,x3), ineffset(a9,x5), ineffset(a9,x25), ineffset(a18,x12), ineffset(a18,x18), ineffset(a18,x20), ineffset(a18,x21), ineffset(a4,co8), ineffset(a4,co9), ineffset(a15,x4), ineffset(a15,x25), ineffset(a16,co32), ineffset(a16,co33), ineffset(a3,co6), ineffset(a3,co7), ineffset(a11,x9), ineffset(a11,x13), ineffset(a11,x23), ineffset(a17,x3), ineffset(a17,x6), ineffset(a17,x7), ineffset(a20,x13), ineffset(a20,x21), ineffset(a25,x9), ineffset(a25,x11), ineffset(a25,x20), ineffset(a6,x22), ineffset(a22,x5), ineffset(a7,x21), ineffset(a8,x1), ineffset(a8,x15), ineffset(a8,x17), ineffset(a8,x18), ineffset(a23,x13), ineffset(a23,x20), activity(startflow), activity(a24), activity(a13), activity(endflow), activity(a21), activity(a1), activity(a2), activity(a12), activity(a19), activity(a14), activity(a10), activity(a9), activity(a18), activity(a4), activity(a15), activity(a16), activity(a3), activity(a11), activity(a17), activity(a20), activity(a25), activity(a6), activity(a22), activity(a7), activity(a8), activity(a23), effectsObserved(startflow,1), effectsObserved(a24,2), effectsObserved(a13,3), inreadset(a24,x12), inreadset(a13,x4), inreadset(a13,x12), inreadset(endflow,x2), inreadset(endflow,x1), 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,co48), inreadset(endflow,co49), inreadset(endflow,co8), inreadset(endflow,co9), inreadset(endflow,co32), inreadset(endflow,co33), inreadset(endflow,co6), inreadset(endflow,co7), inreadset(endflow,finished), inreadset(a21,x23), inreadset(a1,x2), inreadset(a1,x6), inreadset(a1,x12), inreadset(a2,x8), inreadset(a12,x6), inreadset(a12,x11), inreadset(a12,x20), inreadset(a19,x10), inreadset(a19,x13), inreadset(a14,x1), inreadset(a14,x3), inreadset(a10,x21), inreadset(a9,x1), inreadset(a18,x9), inreadset(a18,x19), inreadset(a18,x23), inreadset(a4,x14), inreadset(a15,x15), inreadset(a16,x3), inreadset(a3,x9), inreadset(a11,x10), inreadset(a11,x18), inreadset(a17,x5), inreadset(a17,x8), inreadset(a20,x21), inreadset(a25,x1), inreadset(a25,x3), inreadset(a6,x5), inreadset(a22,x12), inreadset(a7,x11), inreadset(a7,x18), inreadset(a8,x9), inreadset(a8,x19), inreadset(a23,x4), do(startflow,1), do(a24,2), do(a13,3), nextvis(1,2), nextvis(2,3), subs(a13,6), do(a13,7), do(endflow,8), impossible(a,22), impossible(a,27), impossible(a,37), impossible(a,39), impossible(a,10), impossible(a,12), impossible(a,13), impossible(a,14), impossible(a,15), impossible(a,16), impossible(a,17), impossible(a,18), impossible(a,19), impossible(a,20), impossible(a,21), impossible(a,24), impossible(a,25), impossible(a,26), 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,11), impossible(a,23), impossible(a,40), impossible(a,28), impossible(a,38), nextvis(6,7), nextvis(7,8), nextvis(3,6), nextvis(8,9)}