Build (method = -2) #dp: 269 Step-3' Graph: 28 vertices and 120 arcs (0.00s) Step-4' Graph: 20 vertices and 104 arcs (0.00s) #V4/#V3 = 0.71 #A4/#A3 = 0.87 Ready! (0.00s) Optimize a model with 40 rows, 105 columns and 282 nonzeros Presolve removed 13 rows and 16 columns Presolve time: 0.00s Presolved: 27 rows, 89 columns, 240 nonzeros Variable types: 0 continuous, 89 integer (8 binary) Found heuristic solution: objective 186.0000000 Found heuristic solution: objective 150.0000000 Optimize a model with 27 rows, 89 columns and 240 nonzeros Presolved: 27 rows, 89 columns, 240 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.270e+02 Factor NZ : 3.010e+02 Factor Ops : 4.081e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.68223376e+02 -7.29478265e+02 6.86e+02 2.46e-01 2.16e+01 0s 1 2.28207581e+02 -2.34316196e+02 8.40e+01 3.33e-16 3.77e+00 0s 2 1.42460401e+02 3.64751358e+01 5.51e+00 2.78e-16 6.02e-01 0s 3 1.08554048e+02 9.86638082e+01 2.54e-01 2.22e-16 5.36e-02 0s 4 1.04723773e+02 1.03602330e+02 3.77e-02 2.18e-16 6.04e-03 0s 5 1.04389273e+02 1.04231990e+02 3.94e-03 1.60e-16 8.44e-04 0s 6 1.04333428e+02 1.04333002e+02 5.38e-07 2.22e-16 2.28e-06 0s 7 1.04333333e+02 1.04333333e+02 3.13e-12 1.55e-16 2.35e-12 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 1.04333333e+02 Root relaxation: objective 1.043333e+02, 40 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 104.33333 0 8 150.00000 104.33333 30.4% - 0s H 0 0 105.0000000 104.33333 0.63% - 0s Explored 0 nodes (48 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.050000000000e+02, best bound 1.050000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 105 Solution: 8 x [11] 3 x [4] 13 x [4, 18] 13 x [7, 8] 5 x [12, 15] 11 x [3, 15] 1 x [6, 14] 10 x [16, 17] 2 x [6, 16] 3 x [5, 19] 10 x [6, 13] 3 x [3, 13] 7 x [2, 10] 2 x [2, 19] 11 x [1, 20] 1 x [7, 9, 10] 1 x [7, 7, 10] 1 x [3]