Build (method = -2) #dp: 7166 Step-3' Graph: 1229 vertices and 3680 arcs (0.13s) Step-4' Graph: 431 vertices and 2084 arcs (0.14s) #V4/#V3 = 0.35 #A4/#A3 = 0.57 Ready! (0.14s) Optimize a model with 551 rows, 2085 columns and 5397 nonzeros Presolve removed 152 rows and 153 columns Presolve time: 0.02s Presolved: 399 rows, 1932 columns, 5223 nonzeros Variable types: 0 continuous, 1932 integer (1293 binary) Found heuristic solution: objective 97.0000000 Found heuristic solution: objective 94.0000000 Found heuristic solution: objective 91.0000000 Optimize a model with 399 rows, 1932 columns and 5223 nonzeros Presolved: 399 rows, 1932 columns, 5223 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.060e+03 Factor NZ : 1.266e+04 (roughly 1 MByte of memory) Factor Ops : 6.175e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.65979366e+03 -5.08996307e+03 2.06e+04 2.72e-01 2.49e+01 0s 1 8.83359156e+02 -2.66176950e+03 3.96e+03 5.55e-16 5.06e+00 0s 2 2.58975962e+02 -1.15689964e+03 4.12e+02 6.66e-16 7.42e-01 0s 3 1.36922642e+02 -1.82532996e+02 8.13e+01 5.27e-16 1.50e-01 0s 4 9.91722137e+01 1.87998322e+01 1.40e+01 6.66e-16 3.06e-02 0s 5 9.13259908e+01 5.03039795e+01 3.93e+00 4.58e-16 1.27e-02 0s 6 8.87941723e+01 6.70195087e+01 1.76e+00 4.44e-16 6.24e-03 0s 7 8.60866329e+01 7.29752671e+01 9.93e-01 2.66e-16 3.66e-03 0s 8 8.43468027e+01 7.57854719e+01 5.79e-01 4.44e-16 2.35e-03 0s 9 8.26807567e+01 7.84343356e+01 2.29e-01 2.67e-16 1.15e-03 0s 10 8.22401597e+01 8.03466803e+01 7.24e-02 4.44e-16 5.05e-04 0s 11 8.20683202e+01 8.13033807e+01 1.68e-02 2.62e-16 2.01e-04 0s 12 8.20015530e+01 8.19891775e+01 1.95e-04 4.44e-16 3.24e-06 0s 13 8.20000000e+01 8.19999999e+01 1.33e-09 4.44e-16 3.22e-11 0s 14 8.20000000e+01 8.20000000e+01 3.96e-13 4.44e-16 3.22e-14 0s Barrier solved model in 14 iterations and 0.03 seconds Optimal objective 8.20000000e+01 Root relaxation: objective 8.200000e+01, 1046 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 82.0000000 82.00000 0.0% - 0s Explored 0 nodes (1356 simplex iterations) in 0.09 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 8.200000000000e+01, best bound 8.200000000000e+01, gap 0.0% Preprocessing time: 0.15 seconds Gurobi run time: 0.09 seconds Total run time: 0.24 seconds Objective: 82 Solution: 1 x [94] 1 x [24] 1 x [112] 1 x [91] 1 x [75] 1 x [17] 1 x [52] 1 x [57] 1 x [38] 1 x [53] 1 x [97] 1 x [21] 1 x [43] 1 x [96] 1 x [42] 1 x [18] 1 x [102] 1 x [72] 1 x [88] 1 x [100] 1 x [119] 1 x [106] 1 x [39] 1 x [27] 1 x [56, 68] 1 x [49] 1 x [83] 1 x [79] 1 x [64] 1 x [2, 47] 1 x [98] 1 x [45] 1 x [99] 1 x [19] 1 x [35] 1 x [50] 1 x [14] 1 x [118] 1 x [89] 1 x [26, 70] 1 x [44] 1 x [103] 1 x [40, 101] 1 x [74] 1 x [120] 1 x [8] 1 x [109] 1 x [67] 1 x [1] 1 x [80] 1 x [20] 1 x [105] 1 x [23] 1 x [90] 1 x [10, 22] 1 x [34, 104, 110] 1 x [54, 61, 76, 82] 1 x [51, 108] 1 x [6, 31] 1 x [32, 78] 1 x [58, 73] 1 x [4, 9] 1 x [3, 25, 33] 1 x [5, 115] 1 x [59, 107] 1 x [93] 1 x [77, 95] 1 x [28, 63] 1 x [13, 116] 1 x [66, 84] 1 x [86, 117] 1 x [12] 1 x [41, 46, 92] 1 x [7, 11] 1 x [29, 36, 114] 1 x [60, 81] 1 x [62, 85] 1 x [30, 113] 1 x [15, 16] 1 x [37, 48, 55] 1 x [65, 87, 111] 1 x [69, 71]