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(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(25,26), next(25,29), next(26,27), next(27,28), next(29,30), next(30,31), next(31,32), doAt(startflow,8), doAt(a11,11), doAt(a5,15), doAt(a2,16), doAt(a1,18), doAt(a6,20), doAt(a3,21), doAt(endflow,22), doAt(endflow,27), doAt(endflow,31), doAt(a12,24), doAt(a9,25), doAt(a8,26), doAt(a7,29), doAt(a10,30), ineffset(startflow,x14), ineffset(startflow,x18), ineffset(startflow,x9), ineffset(startflow,x5), ineffset(startflow,x10), ineffset(startflow,x3), ineffset(startflow,x1), ineffset(startflow,x2), ineffset(startflow,x4), ineffset(startflow,x6), ineffset(startflow,x7), ineffset(startflow,x8), ineffset(startflow,x11), ineffset(startflow,x12), ineffset(startflow,x13), ineffset(startflow,x15), ineffset(startflow,x16), ineffset(startflow,x17), ineffset(startflow,x19), ineffset(startflow,x20), ineffset(a11,x1), ineffset(a11,x12), ineffset(a11,x13), ineffset(a5,x14), ineffset(a5,x18), ineffset(a5,x7), ineffset(a5,x12), ineffset(a2,x9), ineffset(a2,x1), ineffset(a1,x9), ineffset(a1,x4), ineffset(a6,co12), ineffset(a6,co13), ineffset(a3,x5), ineffset(a3,x10), ineffset(a3,x3), ineffset(a3,x6), ineffset(endflow,x18), ineffset(endflow,x5), ineffset(endflow,x10), ineffset(endflow,finished), ineffset(a12,x7), ineffset(a9,co18), ineffset(a9,co19), ineffset(a8,x14), ineffset(a8,x13), ineffset(a7,x2), ineffset(a7,x19), ineffset(a10,x6), ineffset(a10,x13), inreadset(a11,x14), inreadset(a11,x18), inreadset(a5,x14), inreadset(a5,x9), inreadset(a5,x5), inreadset(a2,x18), inreadset(a1,x10), inreadset(a1,x7), inreadset(a1,x15), inreadset(a6,x3), inreadset(a3,x5), inreadset(endflow,x14), inreadset(endflow,x18), inreadset(endflow,x9), inreadset(endflow,x5), inreadset(endflow,x10), inreadset(endflow,x3), inreadset(endflow,x1), inreadset(endflow,x2), inreadset(endflow,x4), inreadset(endflow,x6), inreadset(endflow,x7), inreadset(endflow,x8), inreadset(endflow,x11), inreadset(endflow,x12), inreadset(endflow,x13), inreadset(endflow,x15), inreadset(endflow,x16), inreadset(endflow,x17), inreadset(endflow,x19), inreadset(endflow,x20), inreadset(a12,x4), inreadset(a12,x11), inreadset(a9,x16), inreadset(a8,x10), inreadset(a8,x16), inreadset(a7,x8), inreadset(a10,x17), activity(startflow), activity(a11), activity(a5), activity(a2), activity(a1), activity(a6), activity(a3), activity(endflow), activity(a12), activity(a9), activity(a8), activity(a7), activity(a10), provider(a11,provider2), provider(a5,provider0), provider(a2,provider3), provider(a1,provider1), provider(a6,provider0), provider(a3,provider2), provider(endflow,provider2), provider(a12,provider2), provider(a9,provider0), provider(a8,provider1), provider(a7,provider1), provider(a10,provider1), effectsObserved(startflow,1), effectsObserved(a11,2), effectsObserved(a5,3), effectsObserved(a2,4), effectsObserved(a1,5), effectsObserved(a6,6), effectsObserved(a3,7), do(startflow,1), do(a11,2), do(a5,3), do(a2,4), do(a1,5), do(a6,6), do(a3,7), nextvis(1,2), nextvis(2,3), nextvis(3,4), nextvis(4,5), nextvis(5,6), nextvis(6,7), do(a11,11), do(a5,15), do(a2,16), do(a1,18), do(a3,21), do(endflow,22), impossible(a,27), impossible(a,31), impossible(a,24), impossible(a,25), impossible(a,26), impossible(a,29), impossible(a,30), comp(a5,3,x14,9), comp(a5,3,x18,10), comp(a2,4,x9,13), comp(a1,5,x9,12), comp(a3,7,x5,14), comp(a3,7,x10,17), comp(a3,7,x3,19), impossible(a,28), impossible(a,32), nextvis(9,10), nextvis(10,11), nextvis(11,12), nextvis(12,13), nextvis(13,14), nextvis(14,15), nextvis(15,16), nextvis(16,17), nextvis(17,18), nextvis(18,19), nextvis(21,22), nextvis(7,9), nextvis(19,21), nextvis(22,23)}

