Build (method = -2) #dp: 127375 Step-3' Graph: 9374 vertices and 28115 arcs (1.35s) Step-4' Graph: 7369 vertices and 24105 arcs (1.40s) #V4/#V3 = 0.79 #A4/#A3 = 0.86 Ready! (1.40s) Optimize a model with 7404 rows, 24106 columns and 57584 nonzeros Presolve removed 417 rows and 841 columns Presolve time: 0.29s Presolved: 6987 rows, 23265 columns, 57139 nonzeros Variable types: 0 continuous, 23265 integer (0 binary) Optimize a model with 6987 rows, 23265 columns and 57139 nonzeros Presolve removed 2 rows and 2 columns Presolved: 6985 rows, 23263 columns, 57154 nonzeros Root barrier log... Ordering time: 0.17s Barrier statistics: AA' NZ : 4.022e+04 Factor NZ : 1.129e+06 (roughly 20 MBytes of memory) Factor Ops : 5.281e+08 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.65975775e+05 -1.40125706e+07 5.61e+07 1.50e-02 8.19e+03 0s 1 2.38206378e+04 -1.06319104e+07 6.05e+06 5.01e-02 1.05e+03 1s 2 8.33632196e+03 -4.53813112e+06 1.05e+06 1.25e-02 2.16e+02 1s 3 4.49121056e+03 -1.29522393e+06 3.24e+05 2.12e-03 6.07e+01 1s 4 2.74815888e+03 -2.87859084e+05 5.22e+04 4.44e-15 1.14e+01 1s 5 2.32745310e+03 -5.39677846e+04 5.08e+03 1.24e-14 1.67e+00 1s 6 2.20041251e+03 -2.21917831e+04 4.62e+02 5.33e-15 5.58e-01 2s 7 1.99226348e+03 -7.31030187e+03 4.90e+01 3.11e-15 2.02e-01 2s 8 1.77970572e+03 -6.09262088e+03 2.46e+01 2.44e-15 1.70e-01 2s 9 1.54001414e+03 -3.91703771e+03 1.30e+01 1.55e-15 1.18e-01 2s 10 1.44488426e+03 -3.11461866e+03 1.05e+01 1.44e-15 9.82e-02 2s 11 1.42810885e+03 -2.90681065e+03 1.02e+01 1.22e-15 9.34e-02 3s 12 1.39296489e+03 -2.84899505e+03 9.60e+00 1.11e-15 9.14e-02 3s 13 1.15070143e+03 -2.48627413e+03 7.22e+00 1.33e-15 7.83e-02 3s 14 1.08333618e+03 -2.26038501e+03 6.76e+00 1.33e-15 7.20e-02 3s 15 9.23505504e+02 -1.34458780e+03 4.95e+00 6.14e-16 4.88e-02 3s 16 7.64416015e+02 -6.95957347e+02 3.53e+00 6.88e-16 3.14e-02 4s 17 6.71900867e+02 -4.26514490e+02 2.56e+00 5.16e-16 2.36e-02 4s 18 6.33298326e+02 -2.07383871e+02 2.17e+00 4.50e-16 1.81e-02 4s 19 5.63865293e+02 7.04281910e+01 1.31e+00 4.42e-16 1.06e-02 4s 20 5.12819117e+02 2.60538083e+02 7.58e-01 3.00e-16 5.43e-03 4s 21 4.93418403e+02 3.30655678e+02 5.26e-01 3.33e-16 3.50e-03 5s 22 4.78653526e+02 3.90486117e+02 3.43e-01 2.40e-16 1.90e-03 5s 23 4.70363620e+02 4.16716427e+02 2.34e-01 2.59e-16 1.15e-03 5s 24 4.68055369e+02 4.32466787e+02 1.89e-01 3.76e-16 7.66e-04 5s 25 4.63669564e+02 4.43894173e+02 1.21e-01 3.64e-16 4.26e-04 5s 26 4.59894361e+02 4.50106423e+02 6.21e-02 3.28e-16 2.11e-04 6s 27 4.57492360e+02 4.53702728e+02 2.29e-02 2.92e-16 8.16e-05 6s 28 4.56640265e+02 4.55025267e+02 9.60e-03 2.86e-16 3.48e-05 6s 29 4.56323853e+02 4.55540206e+02 4.85e-03 3.33e-16 1.69e-05 6s 30 4.56098264e+02 4.55768606e+02 1.46e-03 2.66e-16 7.10e-06 6s 31 4.56016093e+02 4.55911236e+02 2.71e-04 3.12e-16 2.26e-06 7s 32 4.55996339e+02 4.55979074e+02 1.55e-05 2.61e-16 3.71e-07 7s 33 4.55995115e+02 4.55994466e+02 3.03e-08 2.62e-16 1.39e-08 7s 34 4.55995000e+02 4.55994999e+02 7.05e-12 2.83e-16 1.39e-11 7s Barrier solved model in 34 iterations and 7.15 seconds Optimal objective 4.55995000e+02 Root crossover log... 1075 DPushes remaining with DInf 0.0000000e+00 7s 0 DPushes remaining with DInf 9.1377574e-01 7s 7023 PPushes remaining with PInf 0.0000000e+00 7s 0 PPushes remaining with PInf 0.0000000e+00 8s Push phase complete: Pinf 0.0000000e+00, Dinf 9.1377574e-01 8s Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 8100 4.5599500e+02 0.000000e+00 0.000000e+00 8s 8100 4.5599500e+02 0.000000e+00 0.000000e+00 8s Root relaxation: objective 4.559950e+02, 8100 iterations, 7.75 seconds Total elapsed time = 11.56s Total elapsed time = 15.73s Total elapsed time = 21.07s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 455.99500 0 208 - 455.99500 - - 25s H 0 0 457.0000000 455.99500 0.22% - 26s H 0 0 456.0000000 455.99500 0.00% - 26s Explored 0 nodes (35358 simplex iterations) in 26.90 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.560000000000e+02, best bound 4.560000000000e+02, gap 0.0% Preprocessing time: 1.51 seconds Gurobi run time: 26.90 seconds Total run time: 28.41 seconds Objective: 456 Solution: 18 x [1, 2, 3, 9, 18, 19, 33, 35] 7 x [1, 2, 3, 18, 20, 26, 28, 34, 35] 12 x [1, 2, 5, 9, 12, 14, 35] 4 x [1, 2, 5, 11, 12, 13, 33] 1 x [1, 2, 8, 11, 13, 15, 33, 35] 7 x [1, 2, 8, 11, 13, 18, 27] 3 x [1, 3, 5, 6, 12, 13, 35] 1 x [1, 3, 5, 13, 15, 28, 31, 34, 35] 9 x [1, 3, 5, 14, 18, 22, 26, 35] 14 x [1, 3, 5, 14, 18, 22, 29, 34] 14 x [1, 3, 9, 10, 13, 14, 31] 26 x [1, 3, 9, 10, 13, 15, 34, 35] 2 x [1, 3, 9, 10, 13, 18, 29] 57 x [1, 3, 14, 19, 20, 25, 27, 31, 34, 35] 4 x [1, 4, 5, 8, 15, 18, 33, 35] 61 x [1, 4, 10, 15, 19, 25, 28, 32, 33] 3 x [1, 4, 13, 14, 16, 18, 20, 35] 4 x [1, 4, 13, 23, 24, 27, 28, 30, 31, 34] 13 x [1, 5, 11, 23, 24, 27, 28, 30, 31, 34] 5 x [1, 5, 12, 13, 15, 18, 20, 35] 2 x [1, 6, 9, 13, 19, 25, 28, 32, 33] 28 x [1, 7, 9, 12, 19, 25, 28, 32, 33] 1 x [1, 8, 9, 14, 16, 18, 20, 35] 2 x [1, 8, 9, 23, 24, 27, 29, 30, 31, 33] 1 x [1, 9, 10, 14, 16, 18, 19, 35] 24 x [1, 12, 13, 14, 15, 18, 25, 28] 13 x [1, 12, 20, 21, 22, 24, 27, 29, 31, 33, 34] 4 x [2, 3, 5, 9, 11, 13, 35] 4 x [2, 3, 5, 11, 12, 18, 33, 35] 54 x [2, 9, 12, 14, 17, 18, 20, 31] 22 x [3, 11, 12, 14, 15, 18, 25, 28] 15 x [3, 14, 19, 20, 22, 24, 27, 29, 31, 33, 34] 10 x [8, 14, 17, 18, 20, 24, 27, 29, 30, 34, 35] 11 x [9, 13, 17, 18, 20, 24, 27, 29, 31, 33, 34]