Build (method = -2) #dp: 21986 Step-3' Graph: 779 vertices and 15859 arcs (0.21s) Step-4' Graph: 771 vertices and 15843 arcs (0.22s) #V4/#V3 = 0.99 #A4/#A3 = 1.00 Ready! (0.22s) Optimize a model with 810 rows, 15844 columns and 45994 nonzeros Presolve removed 22 rows and 26 columns Presolve time: 0.55s Presolved: 788 rows, 15818 columns, 46007 nonzeros Variable types: 0 continuous, 15818 integer (11384 binary) Optimize a model with 788 rows, 15818 columns and 46007 nonzeros Presolved: 788 rows, 15818 columns, 46007 nonzeros Root barrier log... Ordering time: 0.02s Barrier statistics: AA' NZ : 2.938e+04 Factor NZ : 1.251e+05 (roughly 8 MBytes of memory) Factor Ops : 2.739e+07 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.60441758e+04 -9.30248389e+04 3.88e+05 1.61e-01 1.01e+02 0s 1 4.07161408e+03 -5.60582357e+04 6.50e+04 1.42e-01 1.83e+01 0s 2 7.00591975e+02 -1.68448451e+04 5.96e+03 1.45e-02 2.00e+00 0s 3 2.96172514e+02 -4.59169127e+03 8.50e+02 1.88e-03 3.47e-01 0s 4 2.16455145e+02 -1.47507996e+03 2.39e+02 3.20e-04 1.02e-01 0s 5 1.40804045e+02 -5.56547296e+02 8.16e+01 2.88e-05 3.77e-02 0s 6 7.88132817e+01 -2.19422791e+02 3.02e+01 5.11e-16 1.48e-02 0s 7 4.27910949e+01 -8.74958372e+01 1.29e+01 3.82e-16 6.13e-03 0s 8 2.57087793e+01 -5.81159459e+01 5.89e+00 5.20e-16 3.47e-03 0s 9 2.33022296e+01 -4.70028227e+01 4.82e+00 3.43e-16 2.85e-03 0s 10 1.99986008e+01 -3.48039753e+01 3.87e+00 3.72e-16 2.18e-03 0s 11 1.23059182e+01 -2.81334774e+01 1.73e+00 4.23e-16 1.47e-03 0s 12 9.52403002e+00 -8.88959920e+00 1.11e+00 4.44e-16 6.61e-04 0s 13 6.73779988e+00 -3.72227994e+00 5.23e-01 2.66e-16 3.58e-04 0s 14 6.01089927e+00 -1.24331738e+00 3.27e-01 2.83e-16 2.43e-04 0s 15 5.96477343e+00 -2.28600288e-01 2.96e-01 3.79e-16 2.07e-04 0s 16 5.54316631e+00 2.82865010e+00 1.31e-01 3.00e-16 8.86e-05 0s 17 5.27316091e+00 3.79420080e+00 3.96e-02 3.40e-16 4.74e-05 0s 18 5.18776347e+00 4.46721650e+00 2.37e-02 2.69e-16 2.31e-05 1s 19 5.17893434e+00 4.50179597e+00 2.21e-02 3.05e-16 2.17e-05 1s 20 5.14891352e+00 4.72856588e+00 1.62e-02 2.86e-16 1.34e-05 1s 21 5.08976877e+00 4.91846845e+00 4.40e-03 5.11e-16 5.45e-06 1s 22 5.07576305e+00 5.00061506e+00 2.51e-03 2.35e-16 2.40e-06 1s 23 5.05708146e+00 5.03949434e+00 2.24e-04 2.95e-16 5.58e-07 1s 24 5.05412399e+00 5.05283904e+00 3.41e-07 2.69e-16 4.06e-08 1s 25 5.05400013e+00 5.05399882e+00 5.84e-14 3.49e-16 4.15e-11 1s 26 5.05400000e+00 5.05400000e+00 2.13e-14 3.60e-16 4.24e-17 1s Barrier solved model in 26 iterations and 0.69 seconds Optimal objective 5.05400000e+00 Root relaxation: objective 5.054000e+00, 11526 iterations, 1.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.05400 0 90 - 5.05400 - - 3s H 0 0 8.0000000 5.05400 36.8% - 4s H 0 0 7.0000000 5.05400 27.8% - 4s 0 0 5.05400 0 150 7.00000 5.05400 27.8% - 5s 0 0 5.05400 0 161 7.00000 5.05400 27.8% - 6s H 0 0 6.0000000 5.05400 15.8% - 6s Cutting planes: MIR: 1 Zero half: 1 Explored 0 nodes (19321 simplex iterations) in 6.85 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: 0.29 seconds Gurobi run time: 6.85 seconds Total run time: 7.13 seconds Objective: 6 Solution: 1 x [4, 12, 28, 32, 36, 36, 37, 38] 1 x [1, 7, 11, 13, 24, 33, 34] 1 x [8, 10, 15, 17, 17, 18, 23, 26] 1 x [2, 9, 16, 16, 16, 17, 20, 21, 22, 30] 1 x [3, 5, 6, 14, 19, 27, 31, 35, 37] 1 x [14, 14, 14, 23, 25, 25, 29, 39]