Build (method = -2) #dp: 25186 Step-3' Graph: 769 vertices and 17378 arcs (0.17s) Step-4' Graph: 762 vertices and 17364 arcs (0.18s) #V4/#V3 = 0.99 #A4/#A3 = 1.00 Ready! (0.18s) Optimize a model with 807 rows, 17365 columns and 50576 nonzeros Presolve removed 28 rows and 28 columns Presolve time: 0.66s Presolved: 779 rows, 17337 columns, 50612 nonzeros Variable types: 0 continuous, 17337 integer (14362 binary) Optimize a model with 779 rows, 17337 columns and 50612 nonzeros Presolved: 779 rows, 17337 columns, 50612 nonzeros Root barrier log... Ordering time: 0.02s Barrier statistics: AA' NZ : 3.426e+04 Factor NZ : 1.392e+05 (roughly 8 MBytes of memory) Factor Ops : 3.367e+07 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.45865700e+03 -4.83394222e+04 8.96e+04 1.33e-01 2.22e+01 0s 1 1.54106885e+03 -2.73336559e+04 1.72e+04 9.60e-02 4.72e+00 0s 2 4.24389851e+02 -1.14847605e+04 3.34e+03 2.69e-02 1.06e+00 0s 3 1.75313162e+02 -2.33515994e+03 4.36e+02 2.01e-03 1.68e-01 0s 4 1.03958832e+02 -3.19232845e+02 6.74e+01 6.18e-16 2.63e-02 0s 5 5.36443681e+01 -1.32391762e+02 2.33e+01 3.56e-16 1.00e-02 0s 6 3.28398766e+01 -5.60138676e+01 1.10e+01 3.30e-16 4.54e-03 0s 7 1.75988199e+01 -3.08162608e+01 3.74e+00 4.07e-16 1.98e-03 0s 8 1.49073955e+01 -1.97516162e+01 2.96e+00 3.92e-16 1.38e-03 0s 9 1.45872913e+01 -1.93428809e+01 2.85e+00 6.00e-16 1.35e-03 0s 10 1.23637235e+01 -1.51396269e+01 2.16e+00 4.39e-16 1.04e-03 0s 11 8.90280486e+00 -9.08018181e+00 1.04e+00 5.04e-16 6.17e-04 0s 12 6.86828907e+00 -1.34555576e+00 3.22e-01 4.50e-16 2.54e-04 0s 13 6.50417512e+00 2.10582784e+00 1.77e-01 2.99e-16 1.33e-04 0s 14 6.54318339e+00 2.24293342e+00 1.67e-01 4.03e-16 1.29e-04 0s 15 6.19140268e+00 3.85850961e+00 9.94e-02 2.93e-16 6.93e-05 0s 16 5.92216644e+00 4.89869259e+00 1.85e-02 2.22e-16 2.98e-05 1s 17 5.86392962e+00 5.55351172e+00 3.94e-03 2.40e-16 8.99e-06 1s 18 5.85964156e+00 5.63625424e+00 3.45e-03 2.83e-16 6.47e-06 1s 19 5.84124676e+00 5.72447627e+00 1.43e-03 2.22e-16 3.38e-06 1s 20 5.83500846e+00 5.76178419e+00 9.60e-04 2.25e-16 2.12e-06 1s 21 5.83020152e+00 5.79356370e+00 6.50e-04 3.33e-16 1.06e-06 1s 22 5.81968979e+00 5.81220687e+00 7.14e-05 2.68e-16 2.16e-07 1s 23 5.81801411e+00 5.81790225e+00 2.44e-14 2.22e-16 3.23e-09 1s 24 5.81800001e+00 5.81799990e+00 5.88e-14 3.39e-16 3.23e-12 1s 25 5.81800000e+00 5.81800000e+00 1.93e-14 2.51e-16 4.00e-18 1s Barrier solved model in 25 iterations and 0.79 seconds Optimal objective 5.81800000e+00 Root relaxation: objective 5.818000e+00, 13462 iterations, 1.31 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.81800 0 95 - 5.81800 - - 3s H 0 0 7.0000000 5.81800 16.9% - 4s 0 0 6.00000 0 150 7.00000 6.00000 14.3% - 6s 0 0 6.00000 0 186 7.00000 6.00000 14.3% - 7s 0 0 6.00000 0 208 7.00000 6.00000 14.3% - 8s 0 0 6.00000 0 217 7.00000 6.00000 14.3% - 10s H 0 0 6.0000000 6.00000 0.0% - 15s Cutting planes: Gomory: 1 MIR: 1 Zero half: 2 Explored 0 nodes (23674 simplex iterations) in 15.07 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0% Preprocessing time: 0.25 seconds Gurobi run time: 15.07 seconds Total run time: 15.32 seconds Objective: 6 Solution: 1 x [1, 7, 17, 19, 23, 34, 38, 45] 1 x [4, 16, 19, 20, 26, 29, 32, 36, 37] 1 x [3, 8, 18, 28, 30, 33, 41] 1 x [5, 9, 12, 13, 21, 22, 25, 31, 39] 1 x [7, 9, 10, 24, 25, 40, 42, 43] 1 x [2, 6, 11, 14, 15, 27, 35, 41, 44]