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(10,14), next(11,12), next(12,13), next(14,15), next(15,16), next(16,17), next(17,18), next(18,19), next(19,20), doAt(startflow,2), doAt(a5,3), doAt(a13,4), doAt(a11,5), doAt(a1,6), doAt(a2,7), doAt(a8,8), doAt(a15,9), doAt(a3,10), doAt(a7,11), doAt(endflow,12), doAt(endflow,19), doAt(a14,14), doAt(a6,15), doAt(a10,16), doAt(a12,17), doAt(a4,18), ineffset(startflow,x1), ineffset(startflow,x2), ineffset(startflow,x3), ineffset(startflow,x4), ineffset(startflow,x5), ineffset(startflow,x6), ineffset(a5,x1), ineffset(a5,x3), ineffset(a5,x6), ineffset(a13,x3), ineffset(a13,x5), ineffset(a13,x6), ineffset(a11,x5), ineffset(a1,x3), ineffset(a2,x2), ineffset(a8,x5), ineffset(a15,x1), ineffset(a15,x3), ineffset(a3,co6), ineffset(a3,co7), ineffset(a7,x1), ineffset(a7,x3), ineffset(a7,x5), ineffset(a7,x6), ineffset(endflow,x2), ineffset(endflow,x5), ineffset(endflow,finished), ineffset(a14,x5), ineffset(a6,x2), ineffset(a6,x4), ineffset(a6,x6), ineffset(a10,x2), ineffset(a10,x4), ineffset(a10,x5), ineffset(a4,x1), ineffset(a4,x2), ineffset(a4,x5), ineffset(a4,x6), activity(startflow), activity(a5), activity(a13), activity(a11), activity(a1), activity(a2), activity(a8), activity(a15), activity(a3), activity(a7), activity(endflow), activity(a14), activity(a6), activity(a10), activity(a12), activity(a4), effectsObserved(startflow,1), inreadset(a5,x3), inreadset(a5,x4), inreadset(a5,x6), inreadset(a13,x5), inreadset(a13,x6), inreadset(a11,x2), inreadset(a11,x4), inreadset(a1,x3), inreadset(a1,x6), inreadset(a2,x1), inreadset(a8,x2), inreadset(a15,x5), inreadset(a3,x1), inreadset(a3,x4), inreadset(a3,x5), inreadset(a7,x2), inreadset(a7,x5), inreadset(a7,x6), inreadset(endflow,x1), inreadset(endflow,x2), inreadset(endflow,x3), inreadset(endflow,x4), inreadset(endflow,x5), inreadset(endflow,x6), inreadset(endflow,co6), inreadset(endflow,co7), inreadset(endflow,finished), inreadset(a14,x1), inreadset(a14,x2), inreadset(a6,x1), inreadset(a6,x4), inreadset(a6,x6), inreadset(a10,x1), inreadset(a10,x4), inreadset(a12,x1), inreadset(a12,x4), inreadset(a12,x5), inreadset(a4,x2), inreadset(a4,x3), inreadset(a4,x6), do(startflow,1), do(a5,3), do(a13,4), do(a11,5), do(a1,6), do(a2,7), do(a8,8), do(a15,9), do(a3,10), do(a7,11), do(endflow,12), do(endflow,19), do(a14,14), do(a6,15), do(a10,16), do(a12,17), do(a4,18), nextvis(3,4), nextvis(4,5), nextvis(5,6), nextvis(6,7), nextvis(7,8), nextvis(8,9), nextvis(9,10), nextvis(10,11), nextvis(10,14), nextvis(11,12), nextvis(14,15), nextvis(15,16), nextvis(16,17), nextvis(17,18), nextvis(18,19), nextvis(1,3), nextvis(12,13), nextvis(19,20)}