Build (method = -2) #dp: 3037 Step-3' Graph: 89 vertices and 730 arcs (0.02s) Step-4' Graph: 56 vertices and 664 arcs (0.02s) #V4/#V3 = 0.63 #A4/#A3 = 0.91 Ready! (0.02s) Optimize a model with 108 rows, 665 columns and 1887 nonzeros Presolve removed 16 rows and 25 columns Presolve time: 0.01s Presolved: 92 rows, 640 columns, 1825 nonzeros Variable types: 0 continuous, 640 integer (246 binary) Found heuristic solution: objective 79.0000000 Found heuristic solution: objective 65.0000000 Optimize a model with 92 rows, 640 columns and 1825 nonzeros Presolved: 92 rows, 640 columns, 1825 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.090e+03 Factor NZ : 2.256e+03 Factor Ops : 7.544e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.12159293e+03 -7.39080239e+03 7.18e+03 2.60e-01 5.50e+01 0s 1 8.37134479e+02 -2.14137628e+03 1.23e+03 1.11e-15 9.66e+00 0s 2 1.65071963e+02 -6.59363710e+02 9.00e+01 7.33e-15 1.09e+00 0s 3 8.14569077e+01 -9.51832415e+01 5.62e+00 2.55e-15 1.53e-01 0s 4 5.71927029e+01 -2.52622340e+01 8.72e-01 1.33e-15 6.49e-02 0s 5 4.78468070e+01 4.62778447e+00 4.26e-01 1.33e-15 3.36e-02 0s 6 4.27820366e+01 2.34184935e+01 1.73e-01 5.52e-16 1.49e-02 0s 7 4.01437885e+01 3.36177652e+01 5.57e-02 6.19e-16 5.02e-03 0s 8 3.88615994e+01 3.69543057e+01 8.55e-03 6.20e-16 1.46e-03 0s 9 3.85060804e+01 3.76515813e+01 3.04e-03 6.27e-16 6.56e-04 0s 10 3.82520736e+01 3.79412542e+01 4.36e-04 5.59e-16 2.39e-04 0s 11 3.81711205e+01 3.81158856e+01 4.32e-05 5.32e-16 4.24e-05 0s 12 3.81553202e+01 3.81404426e+01 1.16e-05 7.77e-16 1.14e-05 0s 13 3.81511545e+01 3.81454214e+01 2.54e-06 6.04e-16 4.40e-06 0s 14 3.81496671e+01 3.81473475e+01 7.43e-07 5.71e-16 1.78e-06 0s 15 3.81491173e+01 3.81489639e+01 9.67e-08 6.66e-16 1.18e-07 0s 16 3.81490387e+01 3.81490382e+01 1.02e-10 4.46e-16 3.89e-10 0s 17 3.81490385e+01 3.81490385e+01 1.40e-13 6.42e-16 3.89e-13 0s Barrier solved model in 17 iterations and 0.01 seconds Optimal objective 3.81490385e+01 Root relaxation: objective 3.814904e+01, 46 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.14904 0 35 65.00000 38.14904 41.3% - 0s H 0 0 39.0000000 38.14904 2.18% - 0s Explored 0 nodes (82 simplex iterations) in 0.04 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.900000000000e+01, best bound 3.900000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.04 seconds Total run time: 0.07 seconds Objective: 39 Solution: 1 x [22, 52] 1 x [23, 51] 1 x [5, 7, 51] 1 x [1, 11, 50] 1 x [2, 50] 2 x [24, 49] 1 x [25, 48] 1 x [26, 47] 1 x [27, 46] 1 x [28, 45] 2 x [2, 14, 45] 1 x [8, 11, 44] 2 x [31, 43] 2 x [32, 42] 2 x [34, 41] 1 x [40, 40] 1 x [2, 27, 39] 1 x [9, 21, 39] 1 x [13, 17, 39] 1 x [11, 20, 38] 1 x [11, 21, 37] 2 x [13, 18, 37] 1 x [6, 25, 36] 1 x [7, 24, 36] 1 x [12, 21, 36] 1 x [13, 19, 36] 1 x [20, 35] 1 x [15, 16, 35] 1 x [3, 30, 33] 1 x [4, 29, 33] 1 x [8, 27, 33] 1 x [15, 18, 33] 1 x [7, 10, 10]