Build (method = -2) #dp: 15017 Step-3' Graph: 1288 vertices and 3857 arcs (0.83s) Step-4' Graph: 197 vertices and 1675 arcs (0.85s) #V4/#V3 = 0.15 #A4/#A3 = 0.43 Ready! (0.85s) Optimize a model with 698 rows, 1676 columns and 4638 nonzeros Presolve removed 483 rows and 484 columns Presolve time: 0.03s Presolved: 215 rows, 1192 columns, 3252 nonzeros Variable types: 0 continuous, 1192 integer (960 binary) Found heuristic solution: objective 477.0000000 Optimize a model with 215 rows, 1192 columns and 3252 nonzeros Presolved: 215 rows, 1192 columns, 3252 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.672e+03 Factor NZ : 5.030e+03 Factor Ops : 1.442e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.59181536e+03 -2.12209453e+03 1.75e+04 2.50e-01 2.50e+01 0s 1 1.07712447e+03 -7.04978829e+02 3.18e+03 5.00e-16 4.75e+00 0s 2 5.55247902e+02 -2.13869964e+01 2.58e+02 4.44e-16 5.35e-01 0s 3 4.85530091e+02 3.58175433e+02 4.50e+01 1.94e-14 9.61e-02 0s 4 4.72926361e+02 4.29684580e+02 1.21e+01 9.55e-15 2.83e-02 0s 5 4.70969474e+02 4.53544079e+02 3.01e+00 7.77e-15 9.27e-03 0s 6 4.70247371e+02 4.59097432e+02 1.56e+00 1.00e-14 5.55e-03 0s 7 4.69454086e+02 4.66028035e+02 5.05e-01 1.29e-14 1.65e-03 0s 8 4.68827452e+02 4.68123855e+02 5.91e-02 1.04e-14 3.17e-04 0s 9 4.68671743e+02 4.68655755e+02 1.04e-03 6.66e-15 7.08e-06 0s 10 4.68666673e+02 4.68666656e+02 1.19e-14 1.95e-14 7.08e-09 0s 11 4.68666667e+02 4.68666667e+02 2.40e-14 1.15e-14 7.08e-12 0s Barrier solved model in 11 iterations and 0.01 seconds Optimal objective 4.68666667e+02 Root relaxation: objective 4.686667e+02, 475 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 468.66667 0 12 477.00000 468.66667 1.75% - 0s H 0 0 469.0000000 468.66667 0.07% - 0s Explored 0 nodes (647 simplex iterations) in 0.07 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.690000000000e+02, best bound 4.690000000000e+02, gap 0.0% Preprocessing time: 0.86 seconds Gurobi run time: 0.07 seconds Total run time: 0.93 seconds Objective: 469 Solution: 1 x [499] 1 x [34] 1 x [328] 1 x [118] 1 x [427] 1 x [439] 1 x [442] 1 x [469] 1 x [337] 1 x [82] 1 x [415] 1 x [160] 1 x [478] 1 x [220] 1 x [319] 1 x [40] 1 x [262] 1 x [352] 1 x [13] 1 x [358] 1 x [106] 1 x [364] 1 x [367] 1 x [379] 1 x [109] 1 x [400] 1 x [403] 1 x [454] 1 x [25] 1 x [175] 1 x [301] 1 x [481] 1 x [433] 1 x [97] 1 x [148] 1 x [169] 1 x [73] 1 x [151] 1 x [91] 1 x [157] 1 x [475] 1 x [37] 1 x [286] 1 x [250] 1 x [112] 1 x [448] 1 x [421] 1 x [340] 1 x [10] 1 x [52] 1 x [346] 1 x [355] 1 x [370] 1 x [130] 1 x [19] 1 x [127] 1 x [265] 1 x [310] 1 x [322] 1 x [100] 1 x [349] 1 x [373] 1 x [325] 1 x [196] 1 x [208] 1 x [280] 1 x [409] 1 x [493] 1 x [289] 1 x [31] 1 x [331] 1 x [229] 1 x [22] 1 x [430] 1 x [191, 244] 1 x [472] 1 x [16] 1 x [199] 1 x [424] 1 x [145] 1 x [388] 1 x [343] 1 x [256] 1 x [70] 1 x [385] 1 x [124] 1 x [274] 1 x [283] 1 x [178] 1 x [436] 1 x [487] 1 x [184] 1 x [271] 1 x [406] 1 x [49] 1 x [115] 1 x [298] 1 x [61] 1 x [7] 1 x [85] 1 x [382] 1 x [94] 1 x [163] 1 x [247] 1 x [277] 1 x [397] 1 x [463] 1 x [226] 1 x [490] 1 x [139] 1 x [58] 1 x [187] 1 x [28] 1 x [241] 1 x [460] 1 x [132, 466] 1 x [121] 1 x [219] 1 x [363] 1 x [376] 1 x [216] 1 x [394] 1 x [190] 1 x [48] 1 x [166] 1 x [207] 1 x [304] 1 x [259] 1 x [297] 1 x [412] 1 x [67] 1 x [136] 1 x [86, 334, 410] 1 x [76, 302, 431] 1 x [138] 1 x [135] 1 x [232] 1 x [268] 1 x [361] 1 x [295] 1 x [496] 1 x [292] 1 x [457] 1 x [30] 1 x [172] 1 x [451] 1 x [1] 1 x [3] 1 x [43] 1 x [79] 1 x [193] 1 x [214] 1 x [45] 1 x [228] 1 x [235] 1 x [445] 1 x [465] 1 x [414] 1 x [154] 1 x [453] 1 x [498] 1 x [223] 1 x [225] 1 x [217] 1 x [60] 1 x [88] 1 x [195] 1 x [307] 1 x [313] 1 x [316] 1 x [486] 1 x [117] 1 x [240] 1 x [181, 377] 1 x [103] 1 x [6] 1 x [306] 1 x [105] 1 x [261] 1 x [243] 1 x [447] 1 x [273] 1 x [141] 1 x [213] 1 x [234] 1 x [309] 1 x [345] 1 x [202, 205] 1 x [156] 1 x [294] 1 x [378] 1 x [165] 1 x [420] 1 x [133] 1 x [51] 1 x [90] 1 x [315] 1 x [189] 1 x [484] 1 x [9] 1 x [57] 1 x [201] 1 x [237] 1 x [249] 1 x [285] 1 x [81] 1 x [168] 1 x [4, 142] 1 x [210] 1 x [276] 1 x [438] 1 x [33] 1 x [186] 1 x [231] 1 x [459] 1 x [80, 318, 338] 1 x [432] 1 x [123] 1 x [174] 1 x [387] 1 x [462] 1 x [180] 1 x [126] 1 x [87] 1 x [89] 1 x [236] 1 x [314] 1 x [215, 253] 1 x [336] 1 x [408] 1 x [300] 1 x [399] 1 x [492] 1 x [147] 1 x [324] 1 x [64, 212, 480] 1 x [384] 1 x [489] 1 x [308] 1 x [55, 66, 333] 1 x [96] 1 x [258] 1 x [183] 1 x [279] 1 x [351] 1 x [63] 1 x [375] 1 x [72] 1 x [348] 1 x [18] 1 x [129] 1 x [204] 1 x [11, 155, 238] 1 x [357] 1 x [114] 1 x [198] 1 x [423] 1 x [21] 1 x [24] 1 x [278] 1 x [461] 1 x [491] 1 x [167] 1 x [446] 1 x [54] 1 x [122] 1 x [282] 1 x [293] 1 x [144] 1 x [398] 1 x [269] 1 x [327] 1 x [383] 1 x [395] 1 x [233] 1 x [393] 1 x [495] 1 x [102] 1 x [5] 1 x [485] 1 x [411] 1 x [477] 1 x [224] 1 x [267] 1 x [473] 1 x [252] 1 x [288] 1 x [426] 1 x [182] 1 x [407] 1 x [93] 1 x [188] 1 x [494] 1 x [95] 1 x [23] 1 x [203] 1 x [311] 1 x [389] 1 x [435] 1 x [17] 1 x [56] 1 x [303] 1 x [372] 1 x [153] 1 x [27] 1 x [39] 1 x [239] 1 x [248] 1 x [260] 1 x [197, 418] 1 x [192, 291] 1 x [12] 1 x [68] 1 x [159] 1 x [75] 1 x [305] 1 x [405] 1 x [456] 1 x [44] 1 x [99] 1 x [150] 1 x [266] 1 x [371] 1 x [452] 1 x [71] 1 x [125] 1 x [146] 1 x [281] 1 x [483] 1 x [497] 1 x [62, 391, 441] 1 x [177] 1 x [2] 1 x [8] 1 x [134] 1 x [140] 1 x [143] 1 x [185] 1 x [449] 1 x [179, 211, 366] 1 x [131] 1 x [458] 1 x [104] 1 x [299] 1 x [354] 1 x [437] 1 x [164] 1 x [275] 1 x [468] 1 x [321] 1 x [171] 1 x [284] 1 x [474] 1 x [111] 1 x [360] 1 x [38] 1 x [50] 1 x [369] 1 x [374] 1 x [65] 1 x [170] 1 x [350] 1 x [20] 1 x [78] 1 x [218] 1 x [425] 1 x [467] 1 x [206, 390] 1 x [108] 1 x [15] 1 x [42] 1 x [158] 1 x [162] 1 x [222] 1 x [74] 1 x [84] 1 x [332] 1 x [335] 1 x [110] 1 x [264] 1 x [342] 1 x [417] 1 x [53] 1 x [59] 1 x [128] 1 x [287] 1 x [323] 1 x [365] 1 x [488] 1 x [402] 1 x [368] 1 x [14] 1 x [263] 1 x [339] 1 x [176] 1 x [272] 1 x [296] 1 x [356] 1 x [471] 1 x [32] 1 x [41] 1 x [98] 1 x [149] 1 x [200] 1 x [326] 1 x [482] 1 x [101] 1 x [221] 1 x [359] 1 x [444] 1 x [476] 1 x [479] 1 x [386] 1 x [347] 1 x [401] 1 x [419] 1 x [137] 1 x [255] 1 x [422] 1 x [257, 450] 1 x [29] 1 x [77] 1 x [120] 1 x [380] 1 x [392] 1 x [404] 1 x [429] 1 x [455] 1 x [26] 1 x [36] 1 x [107] 1 x [227] 1 x [245] 1 x [254] 1 x [330] 1 x [341] 1 x [362] 1 x [413] 1 x [440] 1 x [464] 1 x [194] 1 x [113] 1 x [416] 1 x [434] 1 x [443] 1 x [470] 1 x [501] 1 x [35] 1 x [83] 1 x [119] 1 x [161] 1 x [209] 1 x [230] 1 x [320] 1 x [329] 1 x [353] 1 x [428] 1 x [500] 1 x [270, 381] 1 x [290, 317, 396] 1 x [312] 1 x [46, 92] 1 x [116] 1 x [344] 1 x [47] 1 x [246] 1 x [242] 1 x [69, 173, 251] 1 x [152]