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(4,8), next(5,6), next(6,7), 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(18,22), next(19,20), next(20,21), next(22,23), next(23,24), next(23,37), next(24,25), next(24,28), next(25,26), next(26,27), next(28,29), next(28,32), next(29,30), next(30,31), next(32,33), next(33,34), next(34,35), next(35,36), next(37,38), next(38,39), doAt(startflow,3), doAt(a11,4), doAt(a15,5), doAt(endflow,6), doAt(endflow,20), doAt(endflow,26), doAt(endflow,30), doAt(endflow,35), doAt(endflow,38), doAt(a16,8), doAt(a6,9), doAt(a21,10), doAt(a1,11), doAt(a5,12), doAt(a10,13), doAt(a13,14), doAt(a19,15), doAt(a14,16), doAt(a2,17), doAt(a23,18), doAt(a7,19), doAt(a20,22), doAt(a18,23), doAt(a22,24), doAt(a9,25), doAt(a8,28), doAt(a12,29), doAt(a3,32), doAt(a17,33), doAt(a4,34), doAt(a25,37), 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,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(a11,co22), ineffset(a11,co23), ineffset(a15,x23), ineffset(endflow,x9), ineffset(endflow,finished), ineffset(a16,x3), ineffset(a16,x7), ineffset(a16,x8), ineffset(a16,x20), ineffset(a6,x5), ineffset(a21,x20), ineffset(a1,x1), ineffset(a1,x4), ineffset(a1,x7), ineffset(a5,x5), ineffset(a5,x9), ineffset(a5,x15), ineffset(a5,x16), ineffset(a10,x6), ineffset(a10,x15), ineffset(a10,x24), ineffset(a10,x25), ineffset(a13,x9), ineffset(a13,x21), ineffset(a19,x2), ineffset(a19,x7), ineffset(a19,x10), ineffset(a14,x4), ineffset(a14,x9), ineffset(a14,x15), ineffset(a14,x19), ineffset(a2,x3), ineffset(a2,x16), ineffset(a2,x17), ineffset(a2,x24), ineffset(a23,co46), ineffset(a23,co47), ineffset(a7,x18), ineffset(a20,x7), ineffset(a20,x12), ineffset(a20,x16), ineffset(a18,co36), ineffset(a18,co37), ineffset(a22,co44), ineffset(a22,co45), ineffset(a9,x20), ineffset(a8,co16), ineffset(a8,co17), ineffset(a12,x16), ineffset(a3,x12), ineffset(a17,x8), ineffset(a17,x13), ineffset(a17,x19), ineffset(a4,x1), ineffset(a4,x5), ineffset(a4,x9), ineffset(a4,x23), ineffset(a25,x18), activity(startflow), activity(a11), activity(a15), activity(endflow), activity(a16), activity(a6), activity(a21), activity(a1), activity(a5), activity(a10), activity(a13), activity(a19), activity(a14), activity(a2), activity(a23), activity(a7), activity(a20), activity(a18), activity(a22), activity(a9), activity(a8), activity(a12), activity(a3), activity(a17), activity(a4), activity(a25), effectsObserved(startflow,1), effectsObserved(a11,2), inreadset(a11,x12), inreadset(a15,x11), inreadset(a15,x14), inreadset(a15,x22), 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,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,co22), inreadset(endflow,co23), inreadset(endflow,co46), inreadset(endflow,co47), inreadset(endflow,co36), inreadset(endflow,co37), inreadset(endflow,co44), inreadset(endflow,co45), inreadset(endflow,co16), inreadset(endflow,co17), inreadset(endflow,finished), inreadset(a16,x11), inreadset(a6,x23), inreadset(a21,x5), inreadset(a1,x15), inreadset(a5,x22), inreadset(a10,x17), inreadset(a13,x11), inreadset(a19,x18), inreadset(a14,x3), inreadset(a14,x22), inreadset(a14,x23), inreadset(a2,x24), inreadset(a23,x20), inreadset(a7,x21), inreadset(a20,x9), inreadset(a18,x4), inreadset(a22,x3), inreadset(a9,x12), inreadset(a9,x23), inreadset(a9,x25), inreadset(a8,x5), inreadset(a8,x8), inreadset(a8,x17), inreadset(a12,x5), inreadset(a12,x12), inreadset(a3,x8), inreadset(a17,x20), inreadset(a17,x23), inreadset(a4,x10), inreadset(a25,x13), do(startflow,1), do(a11,2), nextvis(1,2), do(a15,5), do(endflow,6), impossible(a,20), impossible(a,26), impossible(a,30), impossible(a,35), impossible(a,38), impossible(a,8), impossible(a,9), impossible(a,10), impossible(a,11), 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,22), impossible(a,23), impossible(a,24), impossible(a,25), impossible(a,28), impossible(a,29), impossible(a,32), impossible(a,33), impossible(a,34), impossible(a,37), impossible(a,21), impossible(a,39), impossible(a,27), impossible(a,31), impossible(a,36), nextvis(5,6), nextvis(2,5), nextvis(6,7)}