Build (method = -2) #dp: 45297 Step-3' Graph: 881 vertices and 6876 arcs (0.28s) Step-4' Graph: 878 vertices and 6870 arcs (0.28s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.28s) Optimize a model with 918 rows, 6871 columns and 18936 nonzeros Presolve removed 86 rows and 155 columns Presolve time: 0.11s Presolved: 832 rows, 6716 columns, 18648 nonzeros Variable types: 0 continuous, 6716 integer (0 binary) Found heuristic solution: objective 3273.0000000 Optimize a model with 832 rows, 6716 columns and 18648 nonzeros Presolved: 832 rows, 6716 columns, 18648 nonzeros Root barrier log... Ordering time: 0.01s Barrier statistics: AA' NZ : 1.244e+04 Factor NZ : 9.310e+04 (roughly 4 MBytes of memory) Factor Ops : 1.763e+07 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.92037423e+04 -2.04365979e+06 1.33e+06 2.22e-16 1.53e+03 0s 1 1.61687474e+04 -1.33772943e+06 2.66e+05 6.66e-16 3.56e+02 0s 2 7.89381101e+03 -7.63839680e+05 7.32e+04 3.11e-15 1.17e+02 0s 3 5.48967750e+03 -2.48001052e+05 2.60e+04 1.11e-14 3.41e+01 0s 4 4.15518739e+03 -6.23739068e+04 2.74e+03 4.00e-14 6.25e+00 0s 5 3.99460940e+03 -2.13595137e+04 1.61e-11 1.55e-14 1.88e+00 0s 6 3.98155866e+03 -5.71563285e+03 1.46e-10 5.55e-15 7.21e-01 0s 7 3.94234857e+03 -4.88808905e+03 1.12e-10 5.33e-15 6.56e-01 0s 8 3.87841937e+03 -4.30083400e+03 9.27e-11 4.55e-15 6.08e-01 0s 9 3.41170570e+03 -2.94739427e+03 5.01e-11 3.77e-15 4.73e-01 0s 10 3.09030483e+03 -9.52944777e+02 3.37e-11 2.22e-15 3.00e-01 0s 11 2.61002998e+03 -2.49015827e+02 2.19e-11 1.11e-15 2.12e-01 0s 12 2.17223224e+03 4.65221279e+02 1.31e-11 8.04e-16 1.27e-01 0s 13 1.82984403e+03 9.24248180e+02 6.42e-12 6.66e-16 6.73e-02 0s 14 1.62325274e+03 1.18183929e+03 3.41e-12 7.32e-16 3.28e-02 0s 15 1.59856991e+03 1.29270642e+03 3.01e-12 7.13e-16 2.27e-02 0s 16 1.56049644e+03 1.34434921e+03 1.82e-12 7.78e-16 1.61e-02 0s 17 1.52196267e+03 1.42377422e+03 9.07e-12 7.06e-16 7.30e-03 0s 18 1.50198717e+03 1.46807943e+03 3.55e-11 6.28e-16 2.52e-03 0s 19 1.49992935e+03 1.49653159e+03 3.58e-11 5.55e-16 2.52e-04 0s 20 1.49900250e+03 1.49899085e+03 1.32e-09 7.36e-16 8.65e-07 0s 21 1.49900000e+03 1.49899999e+03 2.96e-10 6.59e-16 8.65e-10 0s 22 1.49900000e+03 1.49900000e+03 1.23e-10 8.88e-16 8.65e-13 0s Barrier solved model in 22 iterations and 0.34 seconds Optimal objective 1.49900000e+03 Root relaxation: objective 1.499000e+03, 3397 iterations, 0.37 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1499.00000 0 26 3273.00000 1499.00000 54.2% - 0s H 0 0 1500.0000000 1499.00000 0.07% - 1s * 0 0 0 1499.0000000 1499.00000 0.0% - 1s Cutting planes: Gomory: 4 MIR: 1 Zero half: 2 Explored 0 nodes (6698 simplex iterations) in 1.19 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.499000000000e+03, best bound 1.499000000000e+03, gap 0.0% Preprocessing time: 0.31 seconds Gurobi run time: 1.19 seconds Total run time: 1.51 seconds Objective: 1499 Solution: 7 x [13, 25] 1 x [13, 40] 106 x [13, 31, 34] 44 x [11, 28] 17 x [7, 32] 31 x [7, 30] 60 x [8, 33] 68 x [17, 21] 85 x [6, 8, 21] 14 x [12, 21, 31] 5 x [21, 31, 40] 23 x [17, 18] 69 x [9, 18, 26, 30] 44 x [10, 29] 82 x [2, 10, 28] 19 x [4, 25, 31] 7 x [4, 6, 6, 6, 6, 25, 31] 34 x [6, 6, 26, 26, 31, 39, 40] 16 x [3, 37] 19 x [35, 38] 43 x [35, 37] 6 x [8, 35, 40] 16 x [35, 40] 29 x [1, 37] 82 x [1, 5, 37] 1 x [1, 28] 24 x [1, 28, 28] 150 x [20, 23] 1 x [22, 36] 75 x [22, 22] 7 x [19, 36] 4 x [9, 9, 19, 36] 79 x [36, 36] 54 x [14, 24, 40] 2 x [24, 24] 7 x [24, 24, 26] 46 x [19, 27, 40] 1 x [19, 20] 26 x [2, 14, 20] 38 x [2, 16, 19] 57 x [12, 14, 15]