Build (method = -2) #dp: 1279 Step-3' Graph: 224 vertices and 665 arcs (0.01s) Step-4' Graph: 79 vertices and 375 arcs (0.01s) #V4/#V3 = 0.35 #A4/#A3 = 0.56 Ready! (0.01s) Optimize a model with 139 rows, 376 columns and 974 nonzeros Presolve removed 61 rows and 69 columns Presolve time: 0.01s Presolved: 78 rows, 307 columns, 825 nonzeros Variable types: 0 continuous, 307 integer (230 binary) Found heuristic solution: objective 44.0000000 Found heuristic solution: objective 43.0000000 Optimize a model with 78 rows, 307 columns and 825 nonzeros Presolved: 78 rows, 307 columns, 825 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.180e+02 Factor NZ : 1.298e+03 Factor Ops : 2.423e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.63354779e+02 -6.22790154e+02 1.57e+03 2.39e-01 1.27e+01 0s 1 1.37736609e+02 -2.50943791e+02 2.31e+02 6.66e-16 2.09e+00 0s 2 6.14561468e+01 -4.96835434e+01 2.77e+01 4.44e-16 3.22e-01 0s 3 4.47711807e+01 1.81730760e+01 2.93e+00 6.66e-16 5.34e-02 0s 4 4.19636673e+01 3.30203234e+01 5.52e-01 4.44e-16 1.54e-02 0s 5 4.09896629e+01 3.58040366e+01 2.61e-01 2.22e-16 8.78e-03 0s 6 4.02585328e+01 3.89339391e+01 9.37e-02 2.22e-16 2.27e-03 0s 7 4.00420590e+01 3.99201495e+01 1.71e-02 2.79e-16 2.19e-04 0s 8 4.00000552e+01 3.99999193e+01 7.21e-14 2.22e-16 2.21e-07 0s 9 4.00000000e+01 4.00000000e+01 1.33e-14 3.33e-16 2.21e-13 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 4.00000000e+01 Root relaxation: objective 4.000000e+01, 144 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 40.0000000 40.00000 0.0% - 0s Explored 0 nodes (181 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 40 Solution: 1 x [22] 1 x [46] 1 x [7] 1 x [40] 1 x [37] 1 x [1] 1 x [58] 1 x [34] 1 x [16] 1 x [33] 1 x [17] 1 x [48] 1 x [41] 1 x [20] 1 x [6] 1 x [11] 1 x [59] 1 x [29] 1 x [51] 1 x [50] 1 x [56] 1 x [38] 1 x [10] 1 x [35, 49] 1 x [21, 57] 1 x [25] 1 x [52, 55] 1 x [19, 24] 1 x [4, 28] 1 x [43, 53] 1 x [27, 42, 45] 1 x [5] 1 x [2, 39] 1 x [15, 31, 44] 1 x [12, 47] 1 x [9, 13] 1 x [14, 26, 60] 1 x [8, 18, 32] 1 x [30, 36] 1 x [3, 23, 54]