Build (method = -2) #dp: 48898 Step-3' Graph: 295 vertices and 5863 arcs (0.23s) Step-4' Graph: 295 vertices and 5863 arcs (0.24s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.24s) Optimize a model with 335 rows, 5864 columns and 17098 nonzeros Presolve removed 3 rows and 5 columns Presolve time: 0.04s Presolved: 332 rows, 5859 columns, 17087 nonzeros Variable types: 0 continuous, 5859 integer (0 binary) Found heuristic solution: objective 1631.0000000 Found heuristic solution: objective 1368.0000000 Optimize a model with 332 rows, 5859 columns and 17087 nonzeros Presolved: 332 rows, 5859 columns, 17087 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.106e+04 Factor NZ : 2.757e+04 (roughly 3 MBytes of memory) Factor Ops : 2.937e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.77606986e+04 -6.75633940e+05 5.10e+05 2.22e-16 1.35e+03 0s 1 2.03235203e+04 -4.04146096e+05 8.90e+04 1.33e-15 2.52e+02 0s 2 6.71403550e+03 -1.90331336e+05 1.94e+04 1.11e-15 5.82e+01 0s 3 4.61942161e+03 -1.28960924e+05 6.00e+03 3.55e-15 2.24e+01 0s 4 3.14341386e+03 -4.26853411e+04 1.27e+03 2.75e-14 5.48e+00 0s 5 2.63175460e+03 -2.74507570e+04 1.12e+00 1.47e-14 2.56e+00 0s 6 2.22470198e+03 -1.33498295e+04 7.05e-12 7.55e-15 1.32e+00 0s 7 1.92924310e+03 -6.00137401e+03 3.41e-12 3.44e-15 6.75e-01 0s 8 1.92341835e+03 -4.52781281e+03 1.77e-12 3.00e-15 5.49e-01 0s 9 1.59274380e+03 -2.59354445e+03 1.65e-12 2.00e-15 3.56e-01 0s 10 1.24876475e+03 -1.75125125e+03 1.06e-12 1.67e-15 2.55e-01 0s 11 9.52673492e+02 -1.14088594e+03 9.09e-12 9.99e-16 1.78e-01 0s 12 8.10058904e+02 -5.49120994e+02 5.54e-12 6.94e-16 1.16e-01 0s 13 6.14439663e+02 -1.87259200e+02 3.75e-12 7.17e-16 6.82e-02 0s 14 4.42063296e+02 -8.55573150e+00 2.73e-12 6.66e-16 3.83e-02 0s 15 3.80396459e+02 9.23912729e+01 1.73e-12 6.89e-16 2.45e-02 0s 16 3.60281214e+02 1.20037944e+02 1.22e-12 9.55e-16 2.04e-02 0s 17 3.28900386e+02 1.56273392e+02 1.10e-12 9.76e-16 1.47e-02 0s 18 2.99822637e+02 2.27755123e+02 1.44e-12 7.77e-16 6.13e-03 0s 19 2.96815165e+02 2.41490164e+02 1.15e-12 7.66e-16 4.71e-03 0s 20 2.89282870e+02 2.57183357e+02 7.92e-13 6.89e-16 2.73e-03 0s 21 2.87211848e+02 2.61674114e+02 3.93e-13 8.83e-16 2.17e-03 0s 22 2.85454591e+02 2.67900491e+02 7.74e-13 6.86e-16 1.49e-03 0s 23 2.84382285e+02 2.73181337e+02 3.11e-12 6.64e-16 9.53e-04 0s 24 2.82298712e+02 2.77019581e+02 1.43e-12 6.52e-16 4.49e-04 0s 25 2.81783870e+02 2.78717247e+02 5.52e-12 6.66e-16 2.61e-04 0s 26 2.80998429e+02 2.79321075e+02 2.47e-12 5.95e-16 1.43e-04 0s 27 2.80677947e+02 2.79541544e+02 2.70e-12 6.32e-16 9.66e-05 0s 28 2.80247533e+02 2.79824856e+02 1.23e-12 7.49e-16 3.59e-05 0s 29 2.79936135e+02 2.79929842e+02 4.82e-12 5.72e-16 5.35e-07 0s 30 2.79933333e+02 2.79933333e+02 1.10e-12 4.88e-16 4.64e-12 0s Barrier solved model in 30 iterations and 0.15 seconds Optimal objective 2.79933333e+02 Root relaxation: objective 2.799333e+02, 5025 iterations, 0.25 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 279.93333 0 81 1368.00000 279.93333 79.5% - 0s H 0 0 280.0000000 279.93333 0.02% - 1s Explored 0 nodes (8876 simplex iterations) in 1.03 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.800000000000e+02, best bound 2.800000000000e+02, gap 0.0% Preprocessing time: 0.26 seconds Gurobi run time: 1.03 seconds Total run time: 1.29 seconds Objective: 280 Solution: 8 x [2, 12, 13, 14, 17, 27] 25 x [11, 19, 23, 36] 1 x [2, 11, 12, 23, 27, 36] 6 x [4, 13, 17, 23, 30] 6 x [5, 12, 13, 17, 23, 30, 35] 20 x [9, 13, 24, 25, 32] 5 x [11, 17, 22, 28] 10 x [8, 11, 17, 22, 25] 3 x [8, 13, 15, 17, 22] 21 x [13, 15, 21, 21] 3 x [9, 13, 24, 24, 24, 25, 26] 6 x [9, 13, 13, 24, 24, 26, 27, 35] 6 x [3, 3, 4, 5, 11, 18, 19, 20, 20, 27, 37] 13 x [16, 18, 19, 20, 25, 31, 31, 39] 5 x [4, 5, 10, 13, 19, 24, 29, 31, 35, 36] 3 x [8, 13, 19, 29, 31, 36, 36] 10 x [16, 19, 25, 29, 29, 31, 31] 7 x [3, 3, 6, 10, 12, 19, 27, 29, 31, 37] 1 x [3, 3, 4, 4, 18, 19, 20, 20, 27, 29, 31, 37] 24 x [11, 28, 33, 33] 5 x [2, 5, 11, 17, 18, 20, 20, 40] 1 x [3, 3, 4, 6, 11, 17, 27, 37] 17 x [3, 10, 26, 35, 35, 36, 37, 38, 40] 1 x [3, 24, 24, 26, 29, 29, 37, 40] 2 x [5, 8, 12, 13, 17, 20, 24, 26, 27, 39] 21 x [26, 27, 27, 31, 34, 35, 38, 39] 33 x [6, 7, 8, 10, 20, 26, 34, 36, 38] 5 x [1, 7, 13, 20, 25, 29, 31, 34, 35] 5 x [1, 3, 25, 26, 27, 29, 34, 37] 3 x [2, 3, 5, 18, 20, 20, 24, 24, 26, 29, 29, 35, 35, 37] 2 x [16, 16, 16, 24, 25, 25, 31, 31, 35, 35, 35] 2 x [3, 4, 5, 5, 7, 10, 18, 20, 20, 20, 24, 26, 27, 27, 31, 35, 35, 36]