Build (method = -2) #dp: 1112 Step-3' Graph: 213 vertices and 632 arcs (0.01s) Step-4' Graph: 121 vertices and 448 arcs (0.01s) #V4/#V3 = 0.57 #A4/#A3 = 0.71 Ready! (0.01s) Optimize a model with 141 rows, 449 columns and 1109 nonzeros Presolve removed 36 rows and 60 columns Presolve time: 0.00s Presolved: 105 rows, 389 columns, 1067 nonzeros Variable types: 0 continuous, 389 integer (0 binary) Found heuristic solution: objective 912.0000000 Optimize a model with 105 rows, 389 columns and 1067 nonzeros Presolved: 105 rows, 389 columns, 1067 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.440e+02 Factor NZ : 2.495e+03 Factor Ops : 7.214e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.23371347e+03 -4.69862068e+04 3.29e+04 2.22e-16 2.56e+02 0s 1 1.99880308e+03 -1.85102384e+04 5.52e+03 3.33e-16 5.21e+01 0s 2 1.13406663e+03 -4.55847997e+03 6.30e+02 4.44e-16 9.33e+00 0s 3 7.54559970e+02 -4.34668868e+02 1.38e+01 3.61e-16 1.53e+00 0s 4 6.49435383e+02 7.22373172e+01 4.07e+00 3.16e-16 7.34e-01 0s 5 5.98722647e+02 3.28022045e+02 9.55e-01 1.67e-16 3.43e-01 0s 6 5.79831100e+02 4.28769170e+02 5.71e-01 3.33e-16 1.91e-01 0s 7 5.58343119e+02 4.92426104e+02 1.92e-01 2.22e-16 8.34e-02 0s 8 5.45472068e+02 5.28953703e+02 2.40e-02 1.49e-16 2.09e-02 0s 9 5.41583451e+02 5.38006620e+02 6.69e-04 1.27e-16 4.52e-03 0s 10 5.41209166e+02 5.40947198e+02 6.61e-06 1.72e-16 3.31e-04 0s 11 5.41167645e+02 5.41165629e+02 1.03e-07 3.33e-16 2.55e-06 0s 12 5.41166667e+02 5.41166667e+02 3.75e-12 2.22e-16 3.22e-12 0s Barrier solved model in 12 iterations and 0.01 seconds Optimal objective 5.41166667e+02 Root relaxation: objective 5.411667e+02, 112 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 541.16667 0 34 912.00000 541.16667 40.7% - 0s H 0 0 544.0000000 541.16667 0.52% - 0s H 0 0 542.0000000 541.16667 0.15% - 0s Explored 0 nodes (193 simplex iterations) in 0.03 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.420000000000e+02, best bound 5.420000000000e+02, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.03 seconds Total run time: 0.04 seconds Objective: 542 Solution: 6 x [1, 14, 18, 20] 81 x [1, 15, 16] 5 x [1, 16, 17, 19] 45 x [2, 12, 18, 20] 15 x [3, 8, 19] 4 x [3, 11, 16] 6 x [4, 7] 81 x [4, 10, 17] 93 x [5, 7, 17] 11 x [5, 8, 14] 39 x [6, 9, 14, 19] 17 x [6, 11, 12] 1 x [6, 12, 14, 16] 1 x [7, 10, 14] 15 x [7, 10, 14, 16, 19] 1 x [7, 10, 17, 19, 20] 6 x [8, 9, 12, 16] 25 x [8, 12, 13, 14, 17, 20] 7 x [9, 10, 12, 16] 14 x [9, 10, 13, 14, 19] 1 x [9, 17, 19] 68 x [10, 11, 12, 14, 19]