Build (method = -2) #dp: 2129 Step-3' Graph: 273 vertices and 1152 arcs (0.01s) Step-4' Graph: 252 vertices and 1110 arcs (0.01s) #V4/#V3 = 0.92 #A4/#A3 = 0.96 Ready! (0.01s) Optimize a model with 271 rows, 1111 columns and 2847 nonzeros Presolve removed 63 rows and 116 columns Presolve time: 0.02s Presolved: 208 rows, 995 columns, 2677 nonzeros Variable types: 0 continuous, 995 integer (0 binary) Found heuristic solution: objective 1691.0000000 Optimize a model with 208 rows, 995 columns and 2677 nonzeros Presolved: 208 rows, 995 columns, 2677 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.557e+03 Factor NZ : 5.956e+03 Factor Ops : 2.273e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.09290054e+03 -1.83735019e+05 1.39e+05 2.22e-16 6.02e+02 0s 1 3.72710412e+03 -9.05787804e+04 2.70e+04 1.11e-15 1.34e+02 0s 2 2.13529034e+03 -2.61133372e+04 3.10e+03 1.78e-15 2.19e+01 0s 3 1.95719859e+03 -4.26814458e+03 2.64e+02 2.22e-15 3.49e+00 0s 4 1.77991423e+03 -1.74983233e+03 4.86e+01 1.11e-15 1.81e+00 0s 5 1.43744291e+03 -6.69816557e+02 2.21e+01 6.90e-16 1.07e+00 0s 6 1.15391123e+03 8.18250933e+01 8.12e+00 7.77e-16 5.41e-01 0s 7 9.75952718e+02 4.02707544e+02 2.94e+00 6.35e-16 2.88e-01 0s 8 9.23952590e+02 6.32848343e+02 1.70e+00 6.01e-16 1.46e-01 0s 9 8.54291674e+02 7.92401640e+02 1.84e-01 5.02e-16 3.10e-02 0s 10 8.44532508e+02 8.34548314e+02 8.09e-03 4.56e-16 4.99e-03 0s 11 8.43031699e+02 8.42960441e+02 1.48e-12 5.73e-16 3.56e-05 0s 12 8.43000000e+02 8.43000000e+02 2.37e-12 5.53e-16 4.85e-11 0s 13 8.43000000e+02 8.43000000e+02 5.68e-13 5.61e-16 3.27e-16 0s Barrier solved model in 13 iterations and 0.01 seconds Optimal objective 8.43000000e+02 Root relaxation: objective 8.430000e+02, 301 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 843.0000000 843.00000 0.0% - 0s Explored 0 nodes (301 simplex iterations) in 0.05 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 8.430000000000e+02, best bound 8.430000000000e+02, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.05 seconds Total run time: 0.08 seconds Objective: 843 Solution: 116 x [11, 15] 28 x [6, 9, 11] 25 x [12, 15] 14 x [1, 12] 1 x [18] 2 x [4, 18] 51 x [6, 17, 18] 121 x [1, 17, 18] 9 x [18, 19] 27 x [6, 18] 28 x [9, 9, 10] 92 x [10, 19] 11 x [2] 49 x [2, 9, 9] 7 x [2, 19] 7 x [2, 8, 8, 19] 72 x [4, 7] 16 x [3, 16] 30 x [16, 17, 19] 55 x [5, 13] 77 x [13, 14] 5 x [5, 14, 19]