Build (method = -2) #dp: 5058 Step-3' Graph: 933 vertices and 2792 arcs (0.08s) Step-4' Graph: 277 vertices and 1480 arcs (0.08s) #V4/#V3 = 0.30 #A4/#A3 = 0.53 Ready! (0.08s) Optimize a model with 397 rows, 1481 columns and 3893 nonzeros Presolve removed 141 rows and 141 columns Presolve time: 0.01s Presolved: 256 rows, 1340 columns, 3687 nonzeros Variable types: 0 continuous, 1340 integer (976 binary) Found heuristic solution: objective 96.0000000 Optimize a model with 256 rows, 1340 columns and 3687 nonzeros Presolved: 256 rows, 1340 columns, 3687 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.015e+03 Factor NZ : 6.914e+03 Factor Ops : 2.506e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.47878357e+03 -2.39519479e+03 5.37e+03 2.25e-01 8.53e+00 0s 1 4.51083778e+02 -9.41655153e+02 8.79e+02 5.55e-16 1.59e+00 0s 2 1.71237498e+02 -2.21651848e+02 1.28e+02 4.44e-16 2.78e-01 0s 3 1.04760993e+02 1.42204464e+01 1.60e+01 4.44e-16 4.86e-02 0s 4 9.38971519e+01 6.04110724e+01 3.58e+00 4.44e-16 1.48e-02 0s 5 9.06149517e+01 7.50705930e+01 1.73e+00 5.52e-16 6.52e-03 0s 6 8.87977632e+01 7.95133747e+01 8.39e-01 3.09e-16 3.75e-03 0s 7 8.83415281e+01 8.17539232e+01 6.52e-01 4.44e-16 2.66e-03 0s 8 8.71474128e+01 8.50394108e+01 9.89e-02 2.45e-16 8.15e-04 0s 9 8.70154608e+01 8.69672453e+01 2.75e-14 4.44e-16 1.80e-05 0s 10 8.70000155e+01 8.69999673e+01 1.16e-13 5.55e-16 1.80e-08 0s 11 8.70000000e+01 8.70000000e+01 5.00e-14 4.44e-16 1.80e-14 0s Barrier solved model in 11 iterations and 0.02 seconds Optimal objective 8.70000000e+01 Root relaxation: objective 8.700000e+01, 744 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 87.0000000 87.00000 0.0% - 0s Explored 0 nodes (916 simplex iterations) in 0.05 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 8.700000000000e+01, best bound 8.700000000000e+01, gap 0.0% Preprocessing time: 0.10 seconds Gurobi run time: 0.05 seconds Total run time: 0.14 seconds Objective: 87 Solution: 1 x [44] 1 x [115] 1 x [104] 1 x [101] 1 x [5] 1 x [75] 1 x [6] 1 x [17] 1 x [78] 1 x [54] 1 x [106] 1 x [84] 1 x [23] 1 x [49] 1 x [82] 1 x [110] 1 x [96] 1 x [83] 1 x [40] 1 x [77] 1 x [30] 1 x [81] 1 x [26] 1 x [87] 1 x [2] 1 x [3] 1 x [113] 1 x [21] 1 x [16] 1 x [93] 1 x [27] 1 x [111] 1 x [79] 1 x [14] 1 x [86, 94] 1 x [97] 1 x [20, 108] 1 x [63] 1 x [105] 1 x [15] 1 x [100] 1 x [10] 1 x [34] 1 x [89] 1 x [102] 1 x [52] 1 x [120] 1 x [7] 1 x [8] 1 x [60] 1 x [51] 1 x [11] 1 x [22] 1 x [33] 1 x [92] 1 x [50] 1 x [59] 1 x [109] 1 x [36, 117] 1 x [80, 116] 1 x [118] 1 x [48, 98] 1 x [61] 1 x [66] 1 x [76, 103] 1 x [19, 45] 1 x [70, 119] 1 x [42, 71] 1 x [4, 64] 1 x [32, 55] 1 x [18, 43] 1 x [24] 1 x [37, 69] 1 x [12, 88, 91] 1 x [35, 38] 1 x [46, 62] 1 x [29, 31] 1 x [73, 74] 1 x [53, 90] 1 x [68, 99] 1 x [1, 56] 1 x [13, 39, 72] 1 x [47, 67, 107] 1 x [41, 65, 85] 1 x [25, 57, 58] 1 x [9, 114] 1 x [28, 95, 112]