Build (method = -2) #dp: 13776 Step-3' Graph: 99 vertices and 2514 arcs (0.05s) Step-4' Graph: 99 vertices and 2514 arcs (0.05s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.05s) Optimize a model with 179 rows, 2515 columns and 7392 nonzeros Presolve removed 28 rows and 31 columns Presolve time: 0.02s Presolved: 151 rows, 2484 columns, 7265 nonzeros Variable types: 0 continuous, 2484 integer (1 binary) Found heuristic solution: objective 2844.0000000 Found heuristic solution: objective 2444.0000000 Optimize a model with 151 rows, 2484 columns and 7265 nonzeros Presolved: 151 rows, 2484 columns, 7265 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.048e+03 Factor NZ : 6.372e+03 (roughly 1 MByte of memory) Factor Ops : 3.692e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.74841295e+04 -1.26729517e+05 6.05e+04 2.22e-16 4.59e+02 0s 1 1.39200407e+04 -7.69149610e+04 1.04e+04 1.33e-15 8.82e+01 0s 2 4.41282408e+03 -3.58232019e+04 1.28e+03 2.71e-14 1.51e+01 0s 3 3.05753425e+03 -6.39841327e+03 3.43e+01 4.84e-14 1.98e+00 0s 4 2.52055911e+03 -3.61102430e+02 1.05e+01 9.44e-15 5.87e-01 0s 5 2.15942249e+03 4.74136722e+02 5.95e+00 4.55e-15 3.41e-01 0s 6 1.93027059e+03 7.79396060e+02 4.08e+00 2.89e-15 2.32e-01 0s 7 1.65448467e+03 9.46017946e+02 2.26e+00 1.67e-15 1.43e-01 0s 8 1.49957913e+03 1.09447572e+03 1.12e+00 8.88e-16 8.13e-02 0s 9 1.41771496e+03 1.15654588e+03 5.86e-01 1.11e-15 5.23e-02 0s 10 1.37862076e+03 1.27681806e+03 3.64e-01 7.58e-16 2.04e-02 0s 11 1.33248816e+03 1.28857719e+03 1.17e-01 6.04e-16 8.79e-03 0s 12 1.31702843e+03 1.29747452e+03 4.88e-02 5.83e-16 3.91e-03 0s 13 1.31104632e+03 1.30248304e+03 2.36e-02 7.65e-16 1.71e-03 0s 14 1.30749043e+03 1.30346968e+03 8.27e-03 1.03e-15 8.03e-04 0s 15 1.30600909e+03 1.30480623e+03 2.87e-03 6.84e-16 2.40e-04 0s 16 1.30554953e+03 1.30518506e+03 1.15e-03 6.13e-16 7.30e-05 0s 17 1.30542361e+03 1.30526129e+03 6.02e-04 7.01e-16 3.25e-05 0s 18 1.30530200e+03 1.30528558e+03 8.93e-06 6.92e-16 3.27e-06 0s 19 1.30529188e+03 1.30529128e+03 1.31e-08 7.89e-16 1.21e-07 0s 20 1.30529167e+03 1.30529167e+03 6.15e-10 6.57e-16 3.20e-11 0s Barrier solved model in 20 iterations and 0.03 seconds Optimal objective 1.30529167e+03 Root relaxation: objective 1.305292e+03, 574 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1305.29167 0 35 2444.00000 1305.29167 46.6% - 0s H 0 0 1307.0000000 1305.29167 0.13% - 0s H 0 0 1306.0000000 1305.29167 0.05% - 0s Explored 0 nodes (937 simplex iterations) in 0.17 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.306000000000e+03, best bound 1.306000000000e+03, gap 0.0% Preprocessing time: 0.07 seconds Gurobi run time: 0.17 seconds Total run time: 0.24 seconds Objective: 1306 Solution: 90 x [54] 11 x [32] 43 x [71] 3 x [26, 45] 37 x [17, 43] 5 x [2, 62] 42 x [2, 76, 77] 36 x [2, 72] 30 x [8, 30] 30 x [5, 8] 26 x [8, 43, 75] 14 x [70, 73] 26 x [25, 73] 26 x [49, 63] 32 x [49, 70] 12 x [49, 62, 75] 2 x [12, 49, 62] 10 x [47, 63] 1 x [12, 47, 62] 4 x [12, 36, 61] 2 x [12, 12, 36] 45 x [9, 20] 41 x [52, 68] 10 x [14, 43, 52] 38 x [37, 68] 1 x [20, 37] 4 x [14, 37] 4 x [14, 37, 43] 20 x [55, 80] 20 x [60, 79] 28 x [28, 79] 5 x [55, 79] 5 x [56, 79] 39 x [51, 79] 12 x [33, 40] 37 x [40, 51] 11 x [5, 40, 68] 2 x [14, 40, 75] 2 x [27, 66] 3 x [27, 42] 1 x [7, 27] 49 x [1, 35] 19 x [34, 50] 12 x [50, 59] 38 x [29, 50] 2 x [50, 69, 74] 21 x [41, 43, 50] 47 x [64, 78] 22 x [31, 78] 1 x [11, 48] 5 x [48, 48] 9 x [10, 67] 33 x [18, 58, 72] 1 x [10, 58] 1 x [3, 35, 58] 2 x [58, 58] 5 x [58, 58, 76] 6 x [21, 22, 24] 20 x [14, 21, 39] 1 x [3, 31, 57] 9 x [3, 13, 23, 57] 19 x [7, 57, 69] 10 x [3, 57, 57] 5 x [7, 53, 65] 15 x [7, 35, 65] 1 x [7, 44, 65] 7 x [42, 44, 46] 23 x [4, 42, 44] 8 x [22, 23, 51] 7 x [6, 23, 51] 20 x [15, 23, 38] 4 x [16, 19, 23] 1 x [13, 14, 23] 2 x [3, 6, 22] 21 x [3, 6, 22, 72] 1 x [6, 19] 10 x [6, 16, 16] 3 x [16, 39, 69] 21 x [16, 39, 41] 13 x [59, 69, 69] 2 x [15, 35, 41]