Build (method = -2) #dp: 508 Step-3' Graph: 108 vertices and 317 arcs (0.00s) Step-4' Graph: 57 vertices and 215 arcs (0.00s) #V4/#V3 = 0.53 #A4/#A3 = 0.68 Ready! (0.00s) Optimize a model with 77 rows, 216 columns and 538 nonzeros Presolve removed 15 rows and 18 columns Presolve time: 0.00s Presolved: 62 rows, 198 columns, 500 nonzeros Variable types: 0 continuous, 198 integer (0 binary) Found heuristic solution: objective 1230.0000000 Optimize a model with 62 rows, 198 columns and 500 nonzeros Presolved: 62 rows, 198 columns, 500 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.410e+02 Factor NZ : 1.095e+03 Factor Ops : 2.234e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.83319039e+03 -2.12125761e+04 2.25e+04 2.22e-16 2.64e+02 0s 1 1.99378443e+03 -8.20784797e+03 3.83e+03 4.44e-16 5.25e+01 0s 2 1.36991310e+03 -1.62585308e+03 2.74e+02 2.11e-15 8.60e+00 0s 3 1.10997922e+03 9.31580637e+01 1.20e+01 3.33e-16 2.53e+00 0s 4 1.01138441e+03 5.96884105e+02 9.67e-01 2.43e-16 1.02e+00 0s 5 1.00205762e+03 9.23768325e+02 2.83e-01 2.74e-16 1.93e-01 0s 6 9.96037257e+02 9.95767019e+02 2.46e-03 2.63e-16 6.68e-04 0s 7 9.96000000e+02 9.96000000e+02 2.80e-09 2.39e-16 7.26e-10 0s 8 9.96000000e+02 9.96000000e+02 2.27e-13 3.13e-16 7.26e-13 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 9.96000000e+02 Root relaxation: objective 9.960000e+02, 118 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 996.0000000 996.00000 0.0% - 0s Explored 0 nodes (118 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 9.960000000000e+02, best bound 9.960000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 996 Solution: 155 x [1] 2 x [1, 18] 59 x [2, 19] 52 x [3] 42 x [3, 14] 13 x [3, 15, 20] 41 x [3, 17, 20] 8 x [4] 80 x [4, 13] 16 x [4, 15, 20] 50 x [4, 16] 34 x [4, 19] 39 x [5] 56 x [5, 15] 3 x [5, 20] 6 x [6] 36 x [6, 12, 20] 6 x [7] 34 x [7, 12, 20] 34 x [8] 42 x [8, 17] 6 x [8, 20] 65 x [9, 10] 6 x [9, 11] 21 x [9, 12] 12 x [9, 12, 20] 78 x [9, 16, 17, 18]