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(8,12), next(9,10), next(10,11), 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), doAt(startflow,5), doAt(a15,7), doAt(a5,8), doAt(a11,9), doAt(endflow,10), doAt(endflow,22), doAt(endflow,25), doAt(a9,12), doAt(a3,13), doAt(a12,14), doAt(a13,15), doAt(a8,16), doAt(a14,17), doAt(a7,18), doAt(a10,19), doAt(a2,20), doAt(a1,21), doAt(a4,24), ineffset(startflow,x1), ineffset(startflow,x2), ineffset(startflow,x3), ineffset(startflow,x4), ineffset(startflow,x5), ineffset(startflow,x6), ineffset(a15,x6), ineffset(a5,co10), ineffset(a5,co11), ineffset(a11,x1), ineffset(a11,x2), ineffset(a11,x4), ineffset(endflow,x1), ineffset(endflow,x4), ineffset(endflow,x5), ineffset(endflow,finished), ineffset(a9,x4), ineffset(a9,x5), ineffset(a3,x2), ineffset(a3,x5), ineffset(a12,x2), ineffset(a13,x2), ineffset(a13,x4), ineffset(a13,x5), ineffset(a8,x2), ineffset(a14,x1), ineffset(a7,x4), ineffset(a10,x4), ineffset(a2,co4), ineffset(a2,co5), ineffset(a1,x1), ineffset(a1,x4), ineffset(a1,x5), ineffset(a4,x1), ineffset(a4,x3), ineffset(a4,x4), ineffset(a4,x6), activity(startflow), activity(a15), activity(a5), activity(a11), activity(endflow), activity(a9), activity(a3), activity(a12), activity(a13), activity(a8), activity(a14), activity(a7), activity(a10), activity(a2), activity(a1), activity(a4), effectsObserved(startflow,1), effectsObserved(a15,2), effectsObserved(a5,3), effectsObserved(a11,4), inreadset(a15,x1), inreadset(a5,x3), inreadset(a5,x6), inreadset(a11,x1), inreadset(a11,x6), inreadset(endflow,x1), inreadset(endflow,x2), inreadset(endflow,x3), inreadset(endflow,x4), inreadset(endflow,x5), inreadset(endflow,x6), inreadset(endflow,co10), inreadset(endflow,co11), inreadset(endflow,co4), inreadset(endflow,co5), inreadset(endflow,finished), inreadset(a9,x3), inreadset(a9,x5), inreadset(a9,x6), inreadset(a3,x5), inreadset(a12,x6), inreadset(a13,x4), inreadset(a8,x1), inreadset(a8,x2), inreadset(a8,x3), inreadset(a14,x5), inreadset(a7,x1), inreadset(a7,x5), inreadset(a10,x2), inreadset(a2,x2), inreadset(a1,x1), inreadset(a1,x4), inreadset(a4,x1), inreadset(a4,x3), inreadset(a4,x5), do(startflow,1), do(a15,2), do(a5,3), do(a11,4), nextvis(1,2), nextvis(2,3), nextvis(3,4), do(a11,9), do(endflow,10), impossible(a,22), impossible(a,25), 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), comp(a11,4,x1,6), impossible(a,23), impossible(a,26), nextvis(9,10), nextvis(4,6), nextvis(6,9), nextvis(10,11)}