Build (method = -2) #dp: 2216 Step-3' Graph: 207 vertices and 776 arcs (0.01s) Step-4' Graph: 129 vertices and 620 arcs (0.01s) #V4/#V3 = 0.62 #A4/#A3 = 0.80 Ready! (0.01s) Optimize a model with 179 rows, 621 columns and 1609 nonzeros Presolve removed 75 rows and 87 columns Presolve time: 0.01s Presolved: 104 rows, 534 columns, 1491 nonzeros Variable types: 0 continuous, 534 integer (412 binary) Found heuristic solution: objective 35.0000000 Found heuristic solution: objective 34.0000000 Optimize a model with 104 rows, 534 columns and 1491 nonzeros Presolved: 104 rows, 534 columns, 1491 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 8.660e+02 Factor NZ : 2.540e+03 Factor Ops : 7.524e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 -3.67246884e+01 -8.33836073e+02 1.06e+03 2.24e-01 5.01e+00 0s 1 3.13466080e+01 -2.80270996e+02 2.98e+02 4.44e-16 1.39e+00 0s 2 3.98027102e+01 -7.78120269e+01 3.94e+01 4.44e-16 2.35e-01 0s 3 3.52704993e+01 1.14454701e+01 3.37e+00 3.89e-16 3.01e-02 0s 4 3.37672610e+01 2.61792267e+01 9.51e-01 4.44e-16 8.58e-03 0s 5 3.30165066e+01 3.03985892e+01 3.49e-01 2.22e-16 2.85e-03 0s 6 3.25592764e+01 3.21351930e+01 4.12e-02 6.66e-16 4.38e-04 0s 7 3.25001677e+01 3.24992099e+01 9.08e-05 4.44e-16 9.85e-07 0s 8 3.25000001e+01 3.24999992e+01 6.85e-08 4.44e-16 9.25e-10 0s 9 3.25000000e+01 3.25000000e+01 8.53e-14 3.33e-16 1.18e-15 0s Barrier solved model in 9 iterations and 0.01 seconds Optimal objective 3.25000000e+01 Root relaxation: objective 3.250000e+01, 241 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 32.50000 0 5 34.00000 32.50000 4.41% - 0s H 0 0 33.0000000 32.50000 1.52% - 0s Explored 0 nodes (325 simplex iterations) in 0.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.02 seconds Total run time: 0.04 seconds Objective: 33 Solution: 1 x [44] 1 x [41] 1 x [43] 1 x [48] 1 x [30] 1 x [47] 1 x [3, 6, 27] 1 x [50] 1 x [23] 1 x [34] 1 x [49] 1 x [45] 1 x [14, 21] 1 x [42] 1 x [24] 1 x [39] 1 x [28] 1 x [8, 40] 1 x [36] 1 x [12, 26] 1 x [38] 1 x [11, 35] 1 x [13, 29] 1 x [15, 16] 1 x [4, 5, 33] 1 x [25] 1 x [10, 37] 1 x [46] 1 x [18, 22] 1 x [19, 20] 1 x [7, 31] 1 x [1, 17] 1 x [2, 9, 32]