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(6,11), next(7,8), next(8,9), next(9,10), 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(19,23), next(20,21), next(21,22), next(23,24), next(24,25), next(25,26), doAt(startflow,4), doAt(a4,6), doAt(a5,8), doAt(endflow,9), doAt(endflow,21), doAt(endflow,25), doAt(a11,11), doAt(a15,12), doAt(a14,13), doAt(a1,14), doAt(a7,15), doAt(a2,16), doAt(a9,17), doAt(a8,18), doAt(a12,19), doAt(a10,20), doAt(a6,23), doAt(a3,24), subsAt(a5,7), ineffset(startflow,x6), ineffset(startflow,x1), ineffset(startflow,x2), ineffset(startflow,x3), ineffset(startflow,x4), ineffset(startflow,x5), ineffset(a4,co8), ineffset(a4,co9), ineffset(a5,x6), ineffset(a5,x1), ineffset(a5,x2), ineffset(a5,x5), ineffset(endflow,x6), ineffset(endflow,x2), ineffset(endflow,x3), ineffset(endflow,finished), ineffset(a11,x1), ineffset(a15,x1), ineffset(a15,x2), ineffset(a15,x4), ineffset(a15,x5), ineffset(a14,x3), ineffset(a14,x5), ineffset(a1,x6), ineffset(a1,x1), ineffset(a7,x5), ineffset(a2,x6), ineffset(a9,x6), ineffset(a9,x3), ineffset(a9,x4), ineffset(a9,x5), ineffset(a8,x4), ineffset(a12,co24), ineffset(a12,co25), ineffset(a10,x1), ineffset(a10,x2), ineffset(a10,x3), ineffset(a10,x5), ineffset(a6,x6), ineffset(a6,x1), ineffset(a6,x2), ineffset(a6,x4), ineffset(a3,x2), activity(startflow), activity(a4), activity(a5), activity(endflow), activity(a11), activity(a15), activity(a14), activity(a1), activity(a7), activity(a2), activity(a9), activity(a8), activity(a12), activity(a10), activity(a6), activity(a3), effectsObserved(startflow,1), effectsObserved(a4,2), effectsObserved(a5,3), inreadset(a4,x6), inreadset(a4,x3), inreadset(a5,x6), inreadset(endflow,x6), inreadset(endflow,x1), inreadset(endflow,x2), inreadset(endflow,x3), inreadset(endflow,x4), inreadset(endflow,x5), inreadset(endflow,co8), inreadset(endflow,co9), inreadset(endflow,co24), inreadset(endflow,co25), inreadset(endflow,finished), inreadset(a11,x4), inreadset(a15,x4), inreadset(a14,x6), inreadset(a14,x1), inreadset(a14,x5), inreadset(a1,x6), inreadset(a1,x1), inreadset(a7,x5), inreadset(a2,x3), inreadset(a9,x5), inreadset(a8,x1), inreadset(a8,x2), inreadset(a12,x6), inreadset(a12,x1), inreadset(a10,x2), inreadset(a10,x3), inreadset(a10,x5), inreadset(a6,x1), inreadset(a3,x3), inreadset(a3,x5), do(startflow,1), do(a4,2), do(a5,3), nextvis(1,2), nextvis(2,3), subs(a5,7), do(a5,8), do(endflow,9), impossible(a,21), impossible(a,25), 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,20), impossible(a,23), impossible(a,24), comp(a5,3,x6,5), impossible(a,22), impossible(a,26), nextvis(7,8), nextvis(8,9), nextvis(3,5), nextvis(5,7), nextvis(9,10)}