Build (method = -2) #dp: 285311 Step-3' Graph: 1629 vertices and 55244 arcs (3.07s) Step-4' Graph: 1389 vertices and 54788 arcs (3.10s) #V4/#V3 = 0.85 #A4/#A3 = 0.99 Ready! (3.10s) Optimize a model with 1529 rows, 54789 columns and 161570 nonzeros Presolve removed 30 rows and 47 columns Presolve time: 1.69s Presolved: 1499 rows, 54742 columns, 161535 nonzeros Variable types: 0 continuous, 54742 integer (37533 binary) Found heuristic solution: objective 182.0000000 Optimize a model with 1499 rows, 54742 columns and 161535 nonzeros Presolved: 1499 rows, 54742 columns, 161535 nonzeros Root barrier log... Ordering time: 0.21s Barrier statistics: AA' NZ : 1.170e+05 Factor NZ : 3.908e+05 (roughly 26 MBytes of memory) Factor Ops : 1.402e+08 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.08673789e+04 -8.88152609e+05 5.09e+05 8.13e-02 5.88e+01 0s 1 9.54876649e+03 -1.68620414e+05 7.18e+04 6.66e-16 8.62e+00 1s 2 3.83475271e+03 -6.39641061e+04 1.61e+04 3.44e-15 2.14e+00 1s 3 2.15227496e+03 -2.97203181e+04 3.20e+03 3.05e-15 5.90e-01 1s 4 1.34897104e+03 -1.28973670e+04 8.88e+02 1.19e-15 2.08e-01 1s 5 6.83245982e+02 -4.35149443e+03 1.99e+02 1.67e-04 6.34e-02 1s 6 5.04511803e+02 -3.36489053e+03 1.17e+02 1.31e-04 4.54e-02 1s 7 4.39521689e+02 -3.03841644e+03 9.33e+01 8.59e-05 3.96e-02 1s 8 3.78700201e+02 -2.27915808e+03 7.39e+01 1.11e-15 3.02e-02 1s 9 3.54358809e+02 -1.18036437e+03 6.72e+01 6.66e-16 1.88e-02 1s 10 2.73610142e+02 -5.91467788e+02 4.48e+01 4.92e-16 1.07e-02 1s 11 1.94627613e+02 -4.46639243e+02 2.65e+01 5.46e-16 7.45e-03 1s 12 1.68786491e+02 -3.32099111e+02 2.13e+01 5.13e-16 5.78e-03 1s 13 1.56752527e+02 -2.97474625e+02 1.90e+01 5.31e-16 5.20e-03 2s 14 1.26967511e+02 -1.79116150e+02 1.48e+01 4.70e-16 3.53e-03 2s 15 1.05858360e+02 -1.41838874e+02 1.16e+01 4.34e-16 2.80e-03 2s 16 6.61310341e+01 -8.10021213e+01 6.09e+00 4.44e-16 1.59e-03 2s 17 4.82558017e+01 -5.69980825e+01 3.88e+00 4.44e-16 1.10e-03 2s 18 4.45767655e+01 -4.64556462e+01 3.33e+00 3.04e-16 9.45e-04 2s 19 4.21889318e+01 -3.96763157e+01 2.96e+00 3.33e-16 8.44e-04 2s 20 3.41077521e+01 -1.66978660e+01 1.47e+00 5.89e-16 5.01e-04 2s 21 3.13164747e+01 -2.76380606e+00 8.31e-01 4.45e-16 3.27e-04 2s 22 3.04356230e+01 6.63382036e+00 6.08e-01 4.44e-16 2.27e-04 2s 23 2.98395944e+01 1.35607517e+01 4.39e-01 3.03e-16 1.54e-04 2s 24 2.90987675e+01 1.97863511e+01 2.02e-01 2.83e-16 8.68e-05 2s 25 2.86326683e+01 2.78577173e+01 7.90e-03 4.44e-16 7.11e-06 2s 26 2.85727125e+01 2.85570067e+01 7.19e-13 4.44e-16 1.43e-07 3s 27 2.85714286e+01 2.85714285e+01 1.65e-12 4.44e-16 3.50e-13 3s Barrier solved model in 27 iterations and 2.63 seconds Optimal objective 2.85714286e+01 Root relaxation: objective 2.857143e+01, 46600 iterations, 3.91 seconds Total elapsed time = 13.43s Total elapsed time = 18.21s Total elapsed time = 22.24s Total elapsed time = 25.79s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28.57143 0 70 182.00000 28.57143 84.3% - 29s H 0 0 30.0000000 28.57143 4.76% - 29s H 0 0 29.0000000 28.57143 1.48% - 30s Explored 0 nodes (74235 simplex iterations) in 30.91 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0% Preprocessing time: 3.29 seconds Gurobi run time: 30.91 seconds Total run time: 34.20 seconds Objective: 29 Solution: 1 x [23, 47, 54, 67, 75, 140] 1 x [3, 28, 39, 44, 121, 137, 139] 1 x [11, 17, 42, 74, 87, 134, 138] 1 x [15, 29, 34, 72, 81, 134, 136] 1 x [6, 12, 20, 75, 90, 126, 135] 1 x [12, 12, 21, 36, 91, 106, 135] 1 x [23, 27, 56, 71, 88, 103, 133] 1 x [9, 24, 58, 71, 73, 109, 132] 1 x [2, 5, 23, 87, 114, 125, 131] 1 x [12, 24, 25, 92, 102, 102, 131] 1 x [33, 48, 50, 53, 102, 105, 130] 1 x [14, 51, 55, 60, 73, 111, 129] 1 x [5, 16, 20, 69, 119, 119, 128] 1 x [37, 41, 44, 48, 100, 110, 127] 1 x [37, 37, 40, 86, 89, 98, 127] 1 x [2, 2, 19, 98, 117, 120, 124] 1 x [7, 11, 32, 46, 99, 117, 123] 1 x [13, 30, 31, 77, 104, 116, 122] 1 x [1, 52, 57, 86, 87, 93, 121] 1 x [28, 50, 56, 59, 65, 118, 119] 1 x [12, 64, 66, 70, 78, 82, 115] 1 x [22, 32, 49, 85, 107, 109, 113] 1 x [8, 21, 58, 71, 101, 111, 112] 1 x [8, 18, 24, 45, 79, 80, 108] 1 x [4, 60, 62, 76, 95, 106] 1 x [10, 23, 33, 35, 68, 83, 99] 1 x [28, 31, 44, 75, 84, 97, 97] 1 x [26, 61, 63, 64, 66, 94, 96] 1 x [1, 2, 3, 3, 38, 43]