Build (method = -2) #dp: 6814 Step-3' Graph: 97 vertices and 280 arcs (0.03s) Step-4' Graph: 7 vertices and 100 arcs (0.03s) #V4/#V3 = 0.07 #A4/#A3 = 0.36 Ready! (0.03s) Optimize a model with 26 rows, 101 columns and 297 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 24 rows, 99 columns, 293 nonzeros Variable types: 0 continuous, 99 integer (0 binary) Found heuristic solution: objective 1999.0000000 Found heuristic solution: objective 1861.0000000 Optimize a model with 24 rows, 99 columns and 293 nonzeros Presolved: 24 rows, 99 columns, 293 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.020e+02 Factor NZ : 3.000e+02 Factor Ops : 4.900e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.91882593e+03 -1.27800153e+04 9.64e+02 1.11e-16 2.77e+02 0s 1 1.56022404e+03 -5.59976905e+03 3.70e+01 4.44e-16 3.92e+01 0s 2 8.42153504e+02 -9.38914480e+01 3.51e-02 5.00e-16 4.38e+00 0s 3 4.19281034e+02 2.25027625e+02 1.24e-03 4.02e-16 8.96e-01 0s 4 4.01495191e+02 3.94087148e+02 5.05e-05 2.45e-16 3.41e-02 0s 5 4.00004423e+02 3.99993236e+02 1.67e-13 3.33e-16 5.16e-05 0s 6 4.00000000e+02 4.00000000e+02 1.37e-13 1.34e-16 5.24e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 4.00000000e+02 Root relaxation: objective 4.000000e+02, 88 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 400.0000000 400.00000 0.0% - 0s Explored 0 nodes (88 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.000000000000e+02, best bound 4.000000000000e+02, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.00 seconds Total run time: 0.04 seconds Objective: 400 Solution: 136 x [4, 5, 12, 15, 19] 3 x [1, 7, 9, 12, 19] 17 x [1, 8, 10, 13, 15] 65 x [8, 10, 14, 17, 18] 3 x [3, 6, 7, 10, 17] 9 x [2, 3, 4, 6, 17] 17 x [7, 9, 11, 16, 17] 5 x [1, 3, 12, 15, 17] 97 x [1, 2, 6, 7, 17] 1 x [1, 2, 3, 4, 11] 2 x [6, 8, 11, 15, 15] 45 x [2, 3, 6, 11, 18]