Build (method = -2) #dp: 279 Step-3' Graph: 19 vertices and 90 arcs (0.00s) Step-4' Graph: 17 vertices and 86 arcs (0.00s) #V4/#V3 = 0.89 #A4/#A3 = 0.96 Ready! (0.00s) Optimize a model with 56 rows, 87 columns and 231 nonzeros Presolve removed 37 rows and 37 columns Presolve time: 0.00s Presolved: 19 rows, 50 columns, 120 nonzeros Variable types: 0 continuous, 50 integer (15 binary) Found heuristic solution: objective 40.0000000 Found heuristic solution: objective 36.0000000 Optimize a model with 19 rows, 50 columns and 120 nonzeros Presolve removed 2 rows and 3 columns Presolved: 17 rows, 47 columns, 112 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.500e+01 Factor NZ : 1.530e+02 Factor Ops : 1.785e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.58475201e+02 -1.39444495e+02 7.74e+01 1.58e-01 9.86e+00 0s 1 5.81651768e+01 -2.92693282e+01 5.40e+00 4.44e-16 1.24e+00 0s 2 4.22231515e+01 2.41267973e+01 6.96e-03 4.44e-16 1.89e-01 0s 3 3.82605037e+01 2.93964099e+01 4.44e-04 4.44e-16 9.23e-02 0s 4 3.63072528e+01 3.31879586e+01 4.96e-05 2.22e-16 3.25e-02 0s 5 3.50916724e+01 3.45805761e+01 6.06e-06 4.44e-16 5.32e-03 0s 6 3.50014134e+01 3.49971744e+01 2.13e-07 2.22e-16 4.42e-05 0s 7 3.50000000e+01 3.50000000e+01 4.33e-13 1.11e-16 1.59e-10 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 3.50000000e+01 Root relaxation: objective 3.500000e+01, 17 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 35.0000000 35.00000 0.0% - 0s Explored 0 nodes (17 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 35 Solution: 1 x [39] 1 x [38] 2 x [37] 1 x [36] 1 x [35] 1 x [34] 2 x [33] 1 x [32] 2 x [31] 1 x [30] 1 x [29] 1 x [28] 1 x [27] 1 x [26] 1 x [25] 1 x [24] 1 x [2, 23] 1 x [1, 22] 2 x [3, 21] 1 x [5, 20] 1 x [7, 19] 2 x [6, 18] 1 x [8, 17] 1 x [9, 16] 1 x [4, 16] 1 x [10, 15] 1 x [14] 1 x [11, 14] 1 x [12, 13] 1 x [12, 12]