Build (method = -2) #dp: 4229 Step-3' Graph: 81 vertices and 1500 arcs (0.01s) Step-4' Graph: 81 vertices and 1500 arcs (0.01s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.01s) Optimize a model with 162 rows, 1501 columns and 4350 nonzeros Presolve removed 42 rows and 43 columns Presolve time: 0.02s Presolved: 120 rows, 1458 columns, 4224 nonzeros Variable types: 0 continuous, 1458 integer (78 binary) Found heuristic solution: objective 481.0000000 Found heuristic solution: objective 426.0000000 Optimize a model with 120 rows, 1458 columns and 4224 nonzeros Presolved: 120 rows, 1458 columns, 4224 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.381e+03 Factor NZ : 4.404e+03 Factor Ops : 2.103e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.03995133e+03 -2.28207499e+04 5.01e+04 1.02e-01 5.70e+01 0s 1 1.65748529e+03 -7.17570302e+03 8.60e+03 6.66e-16 1.07e+01 0s 2 6.07163480e+02 -2.49333680e+03 8.34e+02 2.66e-15 1.65e+00 0s 3 4.54117329e+02 -7.63191468e+02 7.99e+01 1.44e-15 4.50e-01 0s 4 3.71171533e+02 -2.24112789e+02 1.71e+01 6.66e-16 2.08e-01 0s 5 3.20118181e+02 8.04168036e+01 6.84e+00 4.44e-16 8.29e-02 0s 6 2.93702602e+02 1.21542309e+02 2.73e+00 5.86e-16 5.89e-02 0s 7 2.72392180e+02 1.87018654e+02 1.02e+00 6.07e-16 2.91e-02 0s 8 2.62252154e+02 2.42347388e+02 2.76e-01 4.35e-16 6.80e-03 0s 9 2.59069871e+02 2.53681189e+02 8.13e-02 5.58e-16 1.84e-03 0s 10 2.58103894e+02 2.57600876e+02 2.00e-02 5.55e-16 1.74e-04 0s 11 2.57833717e+02 2.57711271e+02 1.32e-03 4.57e-16 4.17e-05 0s 12 2.57750668e+02 2.57748657e+02 4.46e-06 4.57e-16 6.81e-07 0s 13 2.57750000e+02 2.57750000e+02 1.89e-11 4.42e-16 4.24e-11 0s 14 2.57750000e+02 2.57750000e+02 8.86e-13 4.62e-16 8.00e-17 0s Barrier solved model in 14 iterations and 0.02 seconds Optimal objective 2.57750000e+02 Root relaxation: objective 2.577500e+02, 289 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 257.75000 0 5 426.00000 257.75000 39.5% - 0s H 0 0 258.0000000 257.75000 0.10% - 0s Explored 0 nodes (519 simplex iterations) in 0.07 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.580000000000e+02, best bound 2.580000000000e+02, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.07 seconds Total run time: 0.09 seconds Objective: 258 Solution: 1 x [1, 81] 7 x [2, 80] 6 x [79] 1 x [1, 79] 1 x [4, 78] 6 x [3, 78] 7 x [5, 77] 2 x [2, 77] 5 x [6, 76] 3 x [1, 76] 5 x [7, 75] 4 x [8, 74] 1 x [1, 74] 4 x [9, 73] 2 x [10, 72] 3 x [9, 72] 10 x [71] 3 x [11, 71] 7 x [12, 70] 1 x [11, 70] 6 x [13, 69] 4 x [14, 68] 5 x [15, 67] 5 x [14, 67] 1 x [16, 66] 7 x [16, 65] 9 x [17, 64] 2 x [16, 64] 8 x [19, 63] 7 x [20, 62] 5 x [21, 61] 5 x [22, 60] 1 x [20, 60] 8 x [23, 59] 5 x [18, 58] 6 x [24, 57] 2 x [18, 57] 3 x [25, 56] 1 x [23, 56] 2 x [20, 56] 1 x [27, 55] 7 x [26, 55] 7 x [28, 54] 1 x [26, 54] 5 x [29, 53] 8 x [30, 52] 7 x [31, 51] 3 x [32, 50] 6 x [33, 49] 2 x [34, 48] 3 x [32, 48] 2 x [35, 47] 5 x [36, 46] 3 x [35, 45] 4 x [35, 44] 5 x [39, 43] 1 x [35, 43] 6 x [40, 42] 7 x [38, 41] 1 x [37, 40] 1 x [37, 37] 1 x [13, 34] 1 x [34, 34]