Build (method = -2) #dp: 699 Step-3' Graph: 145 vertices and 428 arcs (0.00s) Step-4' Graph: 39 vertices and 216 arcs (0.00s) #V4/#V3 = 0.27 #A4/#A3 = 0.50 Ready! (0.00s) Optimize a model with 78 rows, 217 columns and 577 nonzeros Presolve removed 24 rows and 28 columns Presolve time: 0.00s Presolved: 54 rows, 189 columns, 499 nonzeros Variable types: 0 continuous, 189 integer (0 binary) Found heuristic solution: objective 3514.0000000 Found heuristic solution: objective 2943.0000000 Optimize a model with 54 rows, 189 columns and 499 nonzeros Presolved: 54 rows, 189 columns, 499 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.810e+02 Factor NZ : 8.590e+02 Factor Ops : 1.575e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.39520842e+04 -4.27495461e+04 8.20e+04 2.22e-16 8.56e+02 0s 1 7.95022437e+03 -1.46300424e+04 1.17e+04 5.55e-16 1.40e+02 0s 2 3.40144276e+03 -2.08204194e+03 3.50e+02 9.99e-15 1.56e+01 0s 3 2.75373081e+03 1.13051361e+03 1.17e+01 2.33e-15 4.14e+00 0s 4 2.22566409e+03 1.91484198e+03 2.80e-01 7.77e-16 7.87e-01 0s 5 2.15751342e+03 2.10620392e+03 8.55e-02 2.22e-16 1.30e-01 0s 6 2.14025395e+03 2.12882285e+03 1.33e-02 2.22e-16 2.89e-02 0s 7 2.13753292e+03 2.13574046e+03 1.83e-03 2.36e-16 4.54e-03 0s 8 2.13700233e+03 2.13699477e+03 9.22e-12 4.44e-16 1.91e-05 0s 9 2.13700000e+03 2.13700000e+03 1.28e-11 2.22e-16 2.06e-11 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 2.13700000e+03 Root relaxation: objective 2.137000e+03, 58 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 2137.0000000 2137.00000 0.0% - 0s Explored 0 nodes (58 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.137000000000e+03, best bound 2.137000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 2137 Solution: 182 x [1] 108 x [2, 39] 13 x [3] 4 x [3, 38] 38 x [3, 39] 132 x [4] 159 x [5, 38] 17 x [6, 36] 2 x [6, 37] 6 x [7, 35] 24 x [8, 35] 150 x [8, 37] 142 x [9, 34] 71 x [10, 31] 32 x [11, 32] 93 x [12, 30] 14 x [12, 32] 32 x [13, 28] 113 x [13, 29] 7 x [13, 32] 5 x [14, 27] 106 x [14, 33] 129 x [15, 27] 3 x [16, 27] 43 x [16, 28] 27 x [17, 26] 12 x [17, 27] 75 x [18, 25] 20 x [19, 25] 21 x [20, 25] 89 x [21, 22] 183 x [22, 23] 2 x [22, 24] 16 x [22, 25] 14 x [22, 29] 23 x [22, 35, 37] 6 x [26, 33, 34] 24 x [28, 30, 31]