Build (method = -2) #dp: 6687 Step-3' Graph: 1302 vertices and 3899 arcs (0.05s) Step-4' Graph: 555 vertices and 2405 arcs (0.06s) #V4/#V3 = 0.43 #A4/#A3 = 0.62 Ready! (0.06s) Optimize a model with 595 rows, 2406 columns and 6112 nonzeros Presolve removed 118 rows and 200 columns Presolve time: 0.04s Presolved: 477 rows, 2206 columns, 6087 nonzeros Variable types: 0 continuous, 2206 integer (0 binary) Found heuristic solution: objective 2536.0000000 Optimize a model with 477 rows, 2206 columns and 6087 nonzeros Presolve removed 3 rows and 3 columns Presolved: 474 rows, 2203 columns, 6105 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.960e+03 Factor NZ : 1.639e+04 (roughly 1 MByte of memory) Factor Ops : 8.531e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.92208104e+04 -5.37153776e+05 1.66e+06 2.22e-16 2.25e+03 0s 1 1.46909626e+04 -3.41435474e+05 2.23e+05 9.99e-16 3.49e+02 0s 2 5.69773682e+03 -1.40474365e+05 3.68e+04 7.33e-15 7.13e+01 0s 3 3.36906370e+03 -2.85945303e+04 4.45e+03 6.66e-15 1.08e+01 0s 4 2.98197279e+03 -9.22656877e+03 9.18e+02 2.00e-15 3.31e+00 0s 5 2.69519055e+03 -5.15378075e+03 2.03e+02 1.33e-15 1.87e+00 0s 6 2.55082452e+03 -2.93551415e+03 1.15e+02 8.88e-16 1.28e+00 0s 7 2.22717247e+03 -1.41082462e+03 3.46e+01 6.66e-16 8.34e-01 0s 8 1.97314996e+03 -3.87096897e+02 1.80e+01 6.39e-16 5.38e-01 0s 9 1.74099089e+03 3.47537057e+02 8.75e+00 5.88e-16 3.17e-01 0s 10 1.66987219e+03 1.03661291e+03 4.59e+00 4.52e-16 1.44e-01 0s 11 1.56504327e+03 1.30177489e+03 1.07e+00 5.55e-16 5.96e-02 0s 12 1.53901943e+03 1.40354921e+03 5.67e-01 5.81e-16 3.07e-02 0s 13 1.52385908e+03 1.44694612e+03 2.94e-01 5.55e-16 1.74e-02 0s 14 1.51539316e+03 1.47476611e+03 1.37e-01 4.69e-16 9.19e-03 0s 15 1.51014023e+03 1.48422113e+03 4.59e-02 5.48e-16 5.86e-03 0s 16 1.50886054e+03 1.49616615e+03 1.81e-02 5.70e-16 2.87e-03 0s 17 1.50777892e+03 1.49950487e+03 4.64e-03 5.47e-16 1.87e-03 0s 18 1.50705991e+03 1.50639856e+03 2.24e-05 4.61e-16 1.49e-04 0s 19 1.50700101e+03 1.50699870e+03 3.14e-07 4.47e-16 5.22e-07 0s 20 1.50700000e+03 1.50700000e+03 1.88e-11 5.55e-16 6.13e-13 0s Barrier solved model in 20 iterations and 0.06 seconds Optimal objective 1.50700000e+03 Root relaxation: objective 1.507000e+03, 535 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 1507.0000000 1507.00000 0.0% - 0s Explored 0 nodes (804 simplex iterations) in 0.16 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.507000000000e+03, best bound 1.507000000000e+03, gap 0.0% Preprocessing time: 0.07 seconds Gurobi run time: 0.16 seconds Total run time: 0.23 seconds Objective: 1507 Solution: 26 x [1, 25] 53 x [1, 26] 14 x [1, 29, 39] 33 x [2, 24] 27 x [2, 24, 40] 112 x [2, 31, 36] 11 x [2, 34, 35] 83 x [3, 23] 3 x [3, 27, 37] 72 x [3, 28, 37] 6 x [3, 34, 35] 42 x [4, 24, 38] 79 x [4, 29, 35] 7 x [4, 30, 35] 2 x [5, 23, 40] 6 x [5, 25, 36] 10 x [5, 28, 35] 132 x [5, 33, 34] 59 x [6, 21] 96 x [7, 20] 82 x [8, 19] 15 x [9, 18] 25 x [9, 27, 36, 37] 25 x [10, 18] 27 x [10, 21, 38] 74 x [10, 26, 32] 7 x [11, 20, 38] 18 x [11, 25, 32] 36 x [11, 27, 29] 46 x [12, 17] 29 x [12, 20, 36] 9 x [13, 16] 10 x [13, 19, 36] 46 x [14, 16] 106 x [14, 22, 30] 9 x [14, 22, 31] 27 x [14, 24, 28] 29 x [15, 22, 29] 1 x [20, 21, 34, 36] 13 x [23, 24, 31, 32, 37]