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(7,15), next(8,9), next(9,10), next(10,11), next(11,12), next(12,13), next(13,14), next(15,16), next(16,17), next(17,18), next(18,19), next(19,20), next(20,21), next(21,22), next(22,23), next(23,24), next(24,25), next(25,26), next(26,27), doAt(startflow,4), doAt(a5,6), doAt(a8,7), doAt(a3,8), doAt(a12,9), doAt(a12,22), doAt(a14,10), doAt(a14,23), doAt(a7,11), doAt(a7,24), doAt(a6,12), doAt(a6,25), doAt(endflow,13), doAt(endflow,26), doAt(a11,15), doAt(a13,16), doAt(a15,17), doAt(a10,18), doAt(a1,19), doAt(a2,20), doAt(a4,21), ineffset(startflow,x9), 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,x10), ineffset(startflow,x11), ineffset(startflow,x12), ineffset(startflow,x13), ineffset(startflow,x14), ineffset(startflow,x15), ineffset(a5,x9), ineffset(a5,x2), ineffset(a5,x7), ineffset(a5,x12), ineffset(a8,co16), ineffset(a8,co17), ineffset(a3,x8), ineffset(a12,x8), ineffset(a14,x4), ineffset(a14,x8), ineffset(a7,x9), ineffset(a7,x6), ineffset(a7,x12), ineffset(a7,x13), ineffset(a6,x14), ineffset(endflow,x5), ineffset(endflow,x12), ineffset(endflow,x14), ineffset(endflow,finished), ineffset(a11,x9), ineffset(a11,x4), ineffset(a11,x5), ineffset(a13,x10), ineffset(a15,x2), ineffset(a15,x4), ineffset(a15,x15), ineffset(a10,x9), ineffset(a10,x5), ineffset(a10,x12), ineffset(a1,x2), ineffset(a2,x5), ineffset(a4,x4), activity(startflow), activity(a5), activity(a8), activity(a3), activity(a12), activity(a14), activity(a7), activity(a6), activity(endflow), activity(a11), activity(a13), activity(a15), activity(a10), activity(a1), activity(a2), activity(a4), effectsObserved(startflow,1), effectsObserved(a5,2), effectsObserved(a8,3), inreadset(a5,x9), inreadset(a8,x3), inreadset(a3,x13), inreadset(a3,x14), inreadset(a12,x3), inreadset(a12,x14), inreadset(a14,x1), inreadset(a14,x3), inreadset(a14,x14), inreadset(a7,x4), inreadset(a7,x13), inreadset(a7,x14), inreadset(a6,x1), inreadset(endflow,x9), 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,x10), inreadset(endflow,x11), inreadset(endflow,x12), inreadset(endflow,x13), inreadset(endflow,x14), inreadset(endflow,x15), inreadset(endflow,co16), inreadset(endflow,co17), inreadset(endflow,finished), inreadset(a11,x3), inreadset(a13,x2), inreadset(a15,x8), inreadset(a10,x11), inreadset(a1,x1), inreadset(a1,x14), inreadset(a2,x11), inreadset(a4,x13), do(startflow,1), do(a5,2), do(a8,3), nextvis(1,2), nextvis(2,3), do(a3,8), do(a12,9), impossible(a,22), do(a14,10), impossible(a,23), do(a7,11), impossible(a,24), do(a6,12), impossible(a,25), do(endflow,13), impossible(a,26), impossible(a,15), impossible(a,16), impossible(a,17), impossible(a,18), impossible(a,19), impossible(a,20), impossible(a,21), impossible(a,27), nextvis(8,9), nextvis(9,10), nextvis(10,11), nextvis(11,12), nextvis(12,13), nextvis(3,8), nextvis(13,14)}