Build (method = -2) #dp: 3175 Step-3' Graph: 98 vertices and 1381 arcs (0.01s) Step-4' Graph: 96 vertices and 1377 arcs (0.01s) #V4/#V3 = 0.98 #A4/#A3 = 1.00 Ready! (0.01s) Optimize a model with 155 rows, 1378 columns and 3946 nonzeros Presolve removed 37 rows and 37 columns Presolve time: 0.03s Presolved: 118 rows, 1341 columns, 3873 nonzeros Variable types: 0 continuous, 1341 integer (661 binary) Found heuristic solution: objective 80.0000000 Found heuristic solution: objective 77.0000000 Optimize a model with 118 rows, 1341 columns and 3873 nonzeros Presolved: 118 rows, 1341 columns, 3873 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.782e+03 Factor NZ : 4.994e+03 Factor Ops : 2.833e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.65425574e+03 -5.83228770e+03 4.56e+03 2.09e-01 3.14e+01 0s 1 1.03074551e+03 -2.71385218e+03 9.83e+02 5.55e-16 7.12e+00 0s 2 2.27995382e+02 -9.29755031e+02 1.02e+02 7.77e-16 9.59e-01 0s 3 1.05776544e+02 -1.50612867e+02 8.81e+00 7.49e-16 1.27e-01 0s 4 7.26465131e+01 -1.86637035e+01 1.64e+00 4.49e-16 3.78e-02 0s 5 6.12965634e+01 1.67894358e+01 6.69e-01 4.32e-16 1.76e-02 0s 6 5.60278392e+01 3.12559823e+01 3.52e-01 3.33e-16 9.64e-03 0s 7 5.38842697e+01 4.19558958e+01 2.57e-01 2.26e-16 4.69e-03 0s 8 5.02285801e+01 4.67677162e+01 7.65e-02 2.26e-16 1.36e-03 0s 9 4.91448696e+01 4.81979763e+01 1.04e-02 3.33e-16 3.62e-04 0s 10 4.90011668e+01 4.89970962e+01 4.10e-05 3.17e-16 1.55e-06 0s 11 4.90000013e+01 4.89999971e+01 6.17e-13 3.34e-16 1.55e-09 0s 12 4.90000000e+01 4.90000000e+01 4.74e-13 3.41e-16 1.55e-12 0s Barrier solved model in 12 iterations and 0.01 seconds Optimal objective 4.90000000e+01 Root relaxation: objective 4.900000e+01, 746 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 49.0000000 49.00000 0.0% - 0s Explored 0 nodes (746 simplex iterations) in 0.05 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.05 seconds Total run time: 0.08 seconds Objective: 49 Solution: 1 x [9, 59] 1 x [6, 59] 2 x [4, 59] 1 x [58] 1 x [5, 58] 1 x [57] 1 x [13, 57] 1 x [10, 57] 1 x [7, 57] 1 x [12, 56] 1 x [16, 55] 1 x [17, 54] 1 x [53] 4 x [19, 52] 1 x [18, 52] 1 x [20, 51] 1 x [22, 50] 1 x [21, 50] 1 x [21, 49] 1 x [1, 8, 13, 48] 1 x [47] 1 x [23, 47] 1 x [24, 46] 1 x [23, 46] 1 x [15, 46] 1 x [24, 45] 1 x [26, 44] 1 x [25, 43] 2 x [26, 42] 1 x [3, 16, 41] 2 x [28, 40] 1 x [27, 40] 1 x [29, 39] 1 x [11, 18, 39] 1 x [30, 38] 1 x [31, 37] 1 x [30, 37] 1 x [32, 36] 1 x [33, 35] 1 x [32, 35] 1 x [32, 34] 1 x [8, 11, 14, 34] 1 x [2, 34]