Build (method = -2) #dp: 21351 Step-3' Graph: 748 vertices and 7102 arcs (0.15s) Step-4' Graph: 747 vertices and 7100 arcs (0.16s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.16s) Optimize a model with 786 rows, 7101 columns and 19818 nonzeros Presolve removed 58 rows and 113 columns Presolve time: 0.12s Presolved: 728 rows, 6988 columns, 19654 nonzeros Variable types: 0 continuous, 6988 integer (72 binary) Found heuristic solution: objective 349.0000000 Found heuristic solution: objective 343.0000000 Optimize a model with 728 rows, 6988 columns and 19654 nonzeros Presolved: 728 rows, 6988 columns, 19654 nonzeros Root barrier log... Ordering time: 0.01s Barrier statistics: AA' NZ : 1.274e+04 Factor NZ : 9.485e+04 (roughly 4 MBytes of memory) Factor Ops : 1.948e+07 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.91446947e+03 -1.89861057e+05 2.53e+05 8.85e-02 3.20e+02 0s 1 1.98219887e+03 -1.29265863e+05 3.53e+04 1.33e-15 5.05e+01 0s 2 9.25561647e+02 -5.99056654e+04 7.26e+03 1.11e-15 1.18e+01 0s 3 7.23995247e+02 -2.84865440e+04 2.35e+03 4.44e-15 4.16e+00 0s 4 5.85683748e+02 -7.33516451e+03 4.41e+02 1.35e-13 8.91e-01 0s 5 5.56124894e+02 -3.49325910e+03 2.35e+02 5.42e-14 4.28e-01 0s 6 4.79483264e+02 -2.95510902e+03 7.41e+01 4.75e-14 2.85e-01 0s 7 4.58249831e+02 -1.79469144e+03 4.08e+01 3.29e-14 1.77e-01 0s 8 4.20277817e+02 -1.50053638e+03 2.82e+01 2.89e-14 1.47e-01 0s 9 4.33719240e+02 -1.11741902e+03 2.77e+01 2.31e-14 1.19e-01 0s 10 4.16981054e+02 -4.62468223e+02 1.09e+01 1.31e-14 6.47e-02 0s 11 3.68345716e+02 -2.80336884e+02 3.77e+00 9.77e-15 4.69e-02 0s 12 3.52318593e+02 -1.11041455e+02 3.00e+00 6.44e-15 3.35e-02 0s 13 3.33817529e+02 -9.68966625e+01 2.52e+00 6.33e-15 3.11e-02 0s 14 3.26313030e+02 -9.00143763e+01 2.32e+00 6.00e-15 3.00e-02 0s 15 2.78912023e+02 9.05098169e+00 1.42e+00 4.11e-15 1.94e-02 0s 16 2.32402421e+02 5.10878543e+01 6.60e-01 3.11e-15 1.30e-02 0s 17 2.10561595e+02 1.24969385e+02 3.40e-01 1.22e-15 6.15e-03 0s 18 1.97123274e+02 1.54016952e+02 1.47e-01 8.88e-16 3.09e-03 0s 19 1.90419125e+02 1.70237827e+02 5.58e-02 6.85e-16 1.45e-03 0s 20 1.87427212e+02 1.85147163e+02 1.42e-02 9.99e-16 1.64e-04 0s 21 1.86574966e+02 1.86385643e+02 8.64e-04 6.79e-16 1.36e-05 0s 22 1.86501033e+02 1.86499733e+02 1.03e-05 8.88e-16 9.38e-08 0s 23 1.86500000e+02 1.86500000e+02 3.28e-10 6.67e-16 2.08e-13 0s Barrier solved model in 23 iterations and 0.39 seconds Optimal objective 1.86500000e+02 Root relaxation: objective 1.865000e+02, 3454 iterations, 0.41 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 186.50000 0 3 343.00000 186.50000 45.6% - 0s H 0 0 187.0000000 186.50000 0.27% - 0s Explored 0 nodes (4546 simplex iterations) in 0.75 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.870000000000e+02, best bound 1.870000000000e+02, gap 0.0% Preprocessing time: 0.20 seconds Gurobi run time: 0.75 seconds Total run time: 0.95 seconds Objective: 187 Solution: 1 x [3, 13] 5 x [8, 16] 3 x [8, 9, 16] 5 x [33] 4 x [16, 33] 3 x [15, 16, 33] 4 x [3, 33] 3 x [19, 33] 1 x [5, 33] 9 x [6] 3 x [6, 17] 2 x [6, 38] 2 x [6, 37] 5 x [5, 6, 25, 25] 3 x [4] 6 x [4, 10, 19] 2 x [3, 4] 3 x [3, 4, 21] 2 x [4, 23, 26] 4 x [4, 23] 2 x [2] 1 x [36] 9 x [30, 36] 3 x [16, 36] 2 x [11, 30] 8 x [11, 15, 23, 37] 2 x [29] 11 x [9, 29, 34] 3 x [29, 37] 2 x [23, 29] 4 x [31] 2 x [30, 31] 1 x [20, 31] 11 x [14, 18] 1 x [1, 27] 18 x [28, 39] 4 x [27, 39] 2 x [24] 15 x [12, 24] 2 x [7, 24] 2 x [14, 24] 7 x [7, 35] 1 x [22, 23, 35] 1 x [32] 3 x [32, 32]