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(4,15), 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(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), doAt(startflow,3), doAt(a13,4), doAt(a6,5), doAt(a4,6), doAt(a7,7), doAt(a10,8), doAt(a10,20), doAt(a12,9), doAt(a12,21), doAt(a1,10), doAt(a1,22), doAt(a9,11), doAt(a9,23), doAt(a8,12), doAt(a8,24), doAt(endflow,13), doAt(endflow,25), doAt(a15,15), doAt(a11,16), doAt(a14,17), doAt(a5,18), doAt(a2,19), ineffset(startflow,x1), ineffset(startflow,x2), ineffset(startflow,x3), ineffset(a13,co26), ineffset(a13,co27), ineffset(a6,x1), ineffset(a4,x1), ineffset(a4,x2), ineffset(a4,x3), ineffset(a7,x2), ineffset(a10,x1), ineffset(a12,x1), ineffset(a12,x2), ineffset(a1,x2), ineffset(a9,x1), ineffset(a9,x2), ineffset(a9,x3), ineffset(a8,x1), ineffset(endflow,x1), ineffset(endflow,finished), ineffset(a15,x1), ineffset(a15,x2), ineffset(a15,x3), ineffset(a11,x1), ineffset(a11,x3), ineffset(a14,x1), ineffset(a14,x2), ineffset(a14,x3), ineffset(a5,x1), ineffset(a5,x2), ineffset(a5,x3), ineffset(a2,x1), ineffset(a2,x2), ineffset(a2,x3), activity(startflow), activity(a13), activity(a6), activity(a4), activity(a7), activity(a10), activity(a12), activity(a1), activity(a9), activity(a8), activity(endflow), activity(a15), activity(a11), activity(a14), activity(a5), activity(a2), effectsObserved(startflow,1), effectsObserved(a13,2), inreadset(a13,x2), inreadset(a13,x3), inreadset(a6,x1), inreadset(a4,x1), inreadset(a4,x2), inreadset(a4,x3), inreadset(a7,x1), inreadset(a7,x2), inreadset(a7,x3), inreadset(a10,x1), inreadset(a10,x2), inreadset(a12,x1), inreadset(a12,x2), inreadset(a1,x2), inreadset(a9,x3), inreadset(a8,x1), inreadset(a8,x2), inreadset(a8,x3), inreadset(endflow,x1), inreadset(endflow,x2), inreadset(endflow,x3), inreadset(endflow,co26), inreadset(endflow,co27), inreadset(endflow,finished), inreadset(a15,x1), inreadset(a15,x2), inreadset(a15,x3), inreadset(a11,x1), inreadset(a11,x3), inreadset(a14,x2), inreadset(a5,x1), inreadset(a5,x3), inreadset(a2,x1), do(startflow,1), do(a13,2), nextvis(1,2), do(a13,4), do(a6,5), do(a4,6), do(a7,7), do(a10,8), impossible(a,20), do(a12,9), impossible(a,21), do(a1,10), impossible(a,22), do(a9,11), impossible(a,23), do(a8,12), impossible(a,24), do(endflow,13), impossible(a,25), impossible(a,15), impossible(a,16), impossible(a,17), impossible(a,18), impossible(a,19), impossible(a,26), nextvis(4,5), nextvis(5,6), nextvis(6,7), nextvis(7,8), nextvis(8,9), nextvis(9,10), nextvis(10,11), nextvis(11,12), nextvis(12,13), nextvis(2,4), nextvis(13,14)}