Build (method = -2) #dp: 19537 Step-3' Graph: 2662 vertices and 7979 arcs (0.39s) Step-4' Graph: 552 vertices and 3759 arcs (0.40s) #V4/#V3 = 0.21 #A4/#A3 = 0.47 Ready! (0.40s) Optimize a model with 672 rows, 3760 columns and 10180 nonzeros Presolve removed 117 rows and 163 columns Presolve time: 0.06s Presolved: 555 rows, 3597 columns, 9908 nonzeros Variable types: 0 continuous, 3597 integer (2781 binary) Found heuristic solution: objective 81.0000000 Optimize a model with 555 rows, 3597 columns and 9908 nonzeros Presolved: 555 rows, 3597 columns, 9908 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.445e+03 Factor NZ : 2.230e+04 (roughly 2 MBytes of memory) Factor Ops : 1.384e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.22080587e+04 -1.84539622e+04 7.70e+04 3.45e-01 4.13e+01 0s 1 2.06398551e+03 -7.93911867e+03 1.25e+04 1.78e-15 7.17e+00 0s 2 4.15477379e+02 -2.52177618e+03 1.14e+03 7.77e-16 8.83e-01 0s 3 1.34693274e+02 -3.94227207e+02 1.64e+02 6.66e-16 1.36e-01 0s 4 7.78752538e+01 -6.89649815e+01 3.68e+01 6.66e-16 3.37e-02 0s 5 6.67911999e+01 1.68878032e+01 1.26e+01 7.77e-16 9.97e-03 0s 6 6.18852110e+01 4.17815559e+01 3.66e+00 5.09e-16 3.35e-03 0s 7 6.06785553e+01 4.77088405e+01 2.32e+00 6.66e-16 2.11e-03 0s 8 5.98011969e+01 5.61031755e+01 1.36e+00 8.88e-16 6.64e-04 0s 9 5.90211525e+01 5.86427605e+01 3.63e-02 4.40e-16 5.63e-05 0s 10 5.90000207e+01 5.89991121e+01 3.86e-14 6.66e-16 1.26e-07 0s 11 5.90000000e+01 5.90000000e+01 1.00e-13 8.88e-16 1.28e-13 0s Barrier solved model in 11 iterations and 0.06 seconds Optimal objective 5.90000000e+01 Root relaxation: objective 5.900000e+01, 2167 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 59.0000000 59.00000 0.0% - 0s Explored 0 nodes (2760 simplex iterations) in 0.25 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0% Preprocessing time: 0.43 seconds Gurobi run time: 0.25 seconds Total run time: 0.68 seconds Objective: 59 Solution: 1 x [71] 1 x [4] 1 x [111] 1 x [77, 91] 1 x [27, 40] 1 x [43, 105] 1 x [94, 113] 1 x [85] 1 x [120] 1 x [45] 1 x [89] 1 x [5] 1 x [24] 1 x [35, 75, 88] 1 x [6, 96] 1 x [65, 92] 1 x [68] 1 x [52] 1 x [59, 61, 101] 1 x [42, 79, 90] 1 x [48, 114] 1 x [30, 51] 1 x [1, 54] 1 x [39, 118] 1 x [36, 37] 1 x [13, 76] 1 x [72, 109] 1 x [28, 87] 1 x [47, 53, 100] 1 x [25, 98] 1 x [18, 86] 1 x [64, 99, 107] 1 x [50, 58] 1 x [31, 84] 1 x [29, 55, 63] 1 x [22, 38] 1 x [62, 73] 1 x [49] 1 x [26, 82] 1 x [57, 67, 104] 1 x [78] 1 x [10, 103] 1 x [32, 116, 117] 1 x [20, 23, 69] 1 x [56, 66] 1 x [16, 112] 1 x [3, 93] 1 x [46, 74] 1 x [14, 106] 1 x [80, 81, 102] 1 x [7, 15, 44] 1 x [33, 115] 1 x [11, 19, 60] 1 x [8, 9, 21] 1 x [108, 110] 1 x [12, 70, 95] 1 x [34, 41] 1 x [17, 83, 97] 1 x [2, 119]