Build (method = -2) #dp: 83751 Step-3' Graph: 298 vertices and 9332 arcs (0.50s) Step-4' Graph: 298 vertices and 9332 arcs (0.51s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.51s) Optimize a model with 358 rows, 9333 columns and 27478 nonzeros Presolve removed 4 rows and 8 columns Presolve time: 0.07s Presolved: 354 rows, 9325 columns, 27462 nonzeros Variable types: 0 continuous, 9325 integer (0 binary) Found heuristic solution: objective 2867.0000000 Found heuristic solution: objective 2257.0000000 Optimize a model with 354 rows, 9325 columns and 27462 nonzeros Presolved: 354 rows, 9325 columns, 27462 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.792e+04 Factor NZ : 3.647e+04 (roughly 4 MBytes of memory) Factor Ops : 4.967e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.27459962e+05 -9.35838683e+05 5.07e+05 2.22e-16 1.50e+03 0s 1 3.48279938e+04 -5.65563406e+05 9.02e+04 7.77e-16 2.81e+02 0s 2 8.62383198e+03 -3.10949036e+05 1.35e+04 3.02e-14 5.07e+01 0s 3 5.76084438e+03 -1.54848648e+05 3.51e+03 4.04e-14 1.56e+01 0s 4 3.97262250e+03 -7.56973815e+04 5.65e+02 2.22e-14 5.14e+00 0s 5 3.56915155e+03 -4.60500621e+04 2.22e+01 1.64e-14 2.68e+00 0s 6 3.30042401e+03 -2.29622251e+04 1.76e-02 8.44e-15 1.40e+00 0s 7 2.85758079e+03 -1.04252298e+04 9.92e-03 4.00e-15 7.10e-01 0s 8 2.61596112e+03 -7.42313501e+03 7.94e-03 2.66e-15 5.37e-01 0s 9 2.44363006e+03 -5.01167029e+03 5.16e-03 2.11e-15 3.99e-01 0s 10 2.19511903e+03 -2.52080004e+03 4.34e-03 1.11e-15 2.52e-01 0s 11 2.13214899e+03 -1.86661790e+03 4.14e-03 9.99e-16 2.14e-01 0s 12 1.71143771e+03 -9.99315643e+02 3.09e-03 7.51e-16 1.45e-01 0s 13 1.42325073e+03 -3.66887249e+02 2.39e-03 8.45e-16 9.57e-02 0s 14 1.22612538e+03 -2.48172884e+02 1.92e-03 8.62e-16 7.88e-02 0s 15 8.72448272e+02 1.12016626e+02 1.04e-03 7.52e-16 4.06e-02 0s 16 7.96728868e+02 2.17348629e+02 8.46e-04 7.81e-16 3.10e-02 0s 17 6.46572581e+02 3.42348953e+02 4.30e-04 7.43e-16 1.63e-02 0s 18 5.78960054e+02 4.18228294e+02 2.30e-04 6.66e-16 8.59e-03 0s 19 5.62305790e+02 4.38854357e+02 1.62e-04 8.05e-16 6.60e-03 0s 20 5.36024329e+02 4.77878853e+02 8.41e-05 8.22e-16 3.11e-03 0s 21 5.30072386e+02 4.90333544e+02 6.47e-05 8.10e-16 2.12e-03 0s 22 5.25415161e+02 4.91397149e+02 5.02e-05 8.28e-16 1.82e-03 0s 23 5.21720379e+02 4.94955117e+02 3.70e-05 1.02e-15 1.43e-03 0s 24 5.20827774e+02 5.03833244e+02 3.02e-05 7.57e-16 9.08e-04 0s 25 5.19234396e+02 5.09819843e+02 2.06e-05 6.68e-16 5.03e-04 0s 26 5.17447839e+02 5.14652748e+02 6.33e-06 6.86e-16 1.49e-04 0s 27 5.16892792e+02 5.16208049e+02 3.08e-06 5.99e-16 3.66e-05 0s 28 5.16401468e+02 5.16396506e+02 1.02e-08 6.70e-16 2.65e-07 0s 29 5.16400001e+02 5.16399997e+02 1.02e-12 6.36e-16 2.65e-10 0s Barrier solved model in 29 iterations and 0.23 seconds Optimal objective 5.16400001e+02 Root relaxation: objective 5.164000e+02, 8599 iterations, 0.43 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 516.40000 0 103 2257.00000 516.40000 77.1% - 1s H 0 0 517.0000000 516.40000 0.12% - 1s Explored 0 nodes (12693 simplex iterations) in 1.80 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.170000000000e+02, best bound 5.170000000000e+02, gap 0.0% Preprocessing time: 0.55 seconds Gurobi run time: 1.80 seconds Total run time: 2.35 seconds Objective: 517 Solution: 21 x [12, 18, 19, 22, 33, 50] 12 x [5, 9, 12, 18, 18, 19, 34] 4 x [4, 8, 12, 35, 55] 20 x [1, 12, 12, 28, 34, 37, 48, 54] 2 x [4, 19, 22, 22, 22, 56, 59, 60] 8 x [14, 15, 58, 60] 7 x [1, 14, 55, 57, 60] 1 x [31, 36, 52, 60] 4 x [1, 31, 36, 52, 60] 5 x [4, 9, 18, 19, 21, 28, 47, 60] 62 x [23, 29, 35, 44] 19 x [11, 23, 44, 50, 55] 14 x [14, 20, 44, 55, 58] 1 x [25, 32, 44, 52, 57] 13 x [1, 1, 6, 31, 36, 56] 2 x [13, 16, 22, 31, 46, 48, 54, 56] 10 x [11, 24, 25, 53, 58] 37 x [24, 34, 52, 53, 57] 2 x [2, 21, 28, 38, 45, 47, 49, 53] 9 x [38, 50, 52, 53, 57] 17 x [5, 7, 37, 38, 45, 48, 49, 53, 54] 3 x [31, 32, 36, 53, 56] 1 x [16, 22, 31, 48, 50, 53, 54, 54, 56] 12 x [3, 11, 49, 50, 53, 55] 3 x [25, 32, 52, 53, 57] 3 x [20, 25, 32, 52, 53, 57] 1 x [14, 42, 50, 54, 55, 56] 8 x [7, 38, 42, 49, 49] 1 x [7, 38, 42, 45, 49, 49] 3 x [5, 7, 38, 42, 49, 49] 13 x [7, 8, 21, 33, 42, 49] 9 x [7, 21, 33, 37, 42, 46, 49] 8 x [22, 22, 35, 42, 46, 49, 49, 54] 2 x [11, 42, 49, 49, 50, 55] 1 x [7, 21, 22, 42, 46, 46, 49] 14 x [15, 24, 24, 58] 20 x [14, 40, 43, 55, 56] 6 x [22, 25, 30, 37, 41, 56, 59] 1 x [22, 22, 22, 25, 30, 41, 56, 59] 1 x [10, 15, 22, 22, 22, 30, 56, 59] 2 x [3, 25, 28, 41, 46, 58] 12 x [31, 36, 41, 51, 56] 16 x [7, 21, 29, 33, 41, 46] 4 x [3, 22, 25, 34, 41, 46, 48, 54] 5 x [14, 31, 36, 39, 56] 23 x [4, 15, 39, 51, 58] 1 x [11, 25, 26, 38, 52, 55] 1 x [25, 26, 31, 52, 55] 14 x [11, 19, 27, 35, 55, 57] 7 x [3, 10, 15, 35, 58] 3 x [3, 10, 15, 21, 28, 43, 46] 24 x [3, 10, 15, 21, 28, 36, 46] 8 x [3, 10, 15, 17, 34, 46, 54] 3 x [3, 10, 15, 18, 46, 48, 54] 2 x [3, 10, 15, 18, 37, 46, 48, 54] 9 x [10, 18, 21, 21, 22, 25, 28, 37, 37, 50, 52, 54, 56] 3 x [19, 19, 31, 35, 36]