Build (method = -2) #dp: 22260 Step-3' Graph: 361 vertices and 1714 arcs (0.12s) Step-4' Graph: 270 vertices and 1532 arcs (0.12s) #V4/#V3 = 0.75 #A4/#A3 = 0.89 Ready! (0.12s) Optimize a model with 289 rows, 1533 columns and 4069 nonzeros Presolve removed 28 rows and 53 columns Presolve time: 0.01s Presolved: 261 rows, 1480 columns, 3993 nonzeros Variable types: 0 continuous, 1480 integer (0 binary) Found heuristic solution: objective 1997.0000000 Optimize a model with 261 rows, 1480 columns and 3993 nonzeros Presolved: 261 rows, 1480 columns, 3993 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.469e+03 Factor NZ : 9.749e+03 Factor Ops : 5.045e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.95623298e+04 -3.24490949e+05 2.79e+05 2.22e-16 6.92e+02 0s 1 4.99252194e+03 -1.25833849e+05 4.03e+04 6.66e-16 1.16e+02 0s 2 2.87234158e+03 -4.66741279e+04 1.03e+04 6.66e-16 3.17e+01 0s 3 2.07475845e+03 -1.33683133e+04 9.95e+02 6.66e-16 6.28e+00 0s 4 1.78832206e+03 -5.56361611e+03 9.51e-01 1.55e-15 2.47e+00 0s 5 1.43529141e+03 -2.87269336e+03 5.52e-01 7.77e-16 1.45e+00 0s 6 1.19393786e+03 -1.91085362e+03 3.95e-01 3.96e-16 1.04e+00 0s 7 8.23624814e+02 -1.01017869e+03 2.49e-01 3.59e-16 6.16e-01 0s 8 4.56044638e+02 -4.63614048e+02 7.60e-02 3.48e-16 3.09e-01 0s 9 4.11293480e+02 6.08755992e+00 6.10e-02 3.20e-16 1.36e-01 0s 10 3.38571715e+02 1.31361030e+02 3.50e-02 3.06e-16 6.96e-02 0s 11 3.05679303e+02 2.09956423e+02 1.75e-02 2.85e-16 3.21e-02 0s 12 3.07474650e+02 2.38050414e+02 1.08e-02 3.06e-16 2.33e-02 0s 13 2.90827056e+02 2.63412158e+02 2.42e-03 3.33e-16 9.20e-03 0s 14 2.85862609e+02 2.84906425e+02 1.25e-12 3.33e-16 3.21e-04 0s 15 2.85714289e+02 2.85714264e+02 8.40e-13 3.33e-16 8.38e-09 0s 16 2.85714286e+02 2.85714286e+02 1.53e-12 3.33e-16 8.38e-12 0s Barrier solved model in 16 iterations and 0.02 seconds Optimal objective 2.85714286e+02 Root relaxation: objective 2.857143e+02, 982 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 285.71429 0 23 1997.00000 285.71429 85.7% - 0s H 0 0 287.0000000 285.71429 0.45% - 0s H 0 0 286.0000000 285.71429 0.10% - 0s Explored 0 nodes (1812 simplex iterations) in 0.13 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.860000000000e+02, best bound 2.860000000000e+02, gap 0.0% Preprocessing time: 0.14 seconds Gurobi run time: 0.13 seconds Total run time: 0.27 seconds Objective: 286 Solution: 102 x [1, 2, 8, 14, 16, 17, 18] 15 x [2, 5, 9, 9, 13, 14, 17] 1 x [1, 2, 5, 9, 9, 19] 4 x [2, 4, 5, 7, 12, 14, 19] 8 x [2, 3, 6, 10, 10, 14, 19] 1 x [5, 7, 12, 14, 16, 19] 3 x [1, 1, 5, 7, 16, 19, 19] 21 x [1, 1, 5, 7, 16, 16, 19] 1 x [3, 7, 9, 9, 13, 14, 17] 6 x [3, 7, 9, 9, 13, 14, 15] 3 x [3, 3, 9, 9, 13, 14, 17] 20 x [3, 5, 9, 9, 11, 13, 19] 2 x [3, 6, 7, 9, 9, 10, 10] 11 x [3, 3, 3, 9, 9, 10, 10] 34 x [4, 4, 4, 4, 5, 12, 15] 8 x [1, 3, 4, 4, 10, 10, 19] 46 x [3, 5, 6, 7, 8, 15, 19]