Build (method = -2) #dp: 3543 Step-3' Graph: 95 vertices and 670 arcs (0.01s) Step-4' Graph: 66 vertices and 612 arcs (0.02s) #V4/#V3 = 0.69 #A4/#A3 = 0.91 Ready! (0.02s) Optimize a model with 135 rows, 613 columns and 1712 nonzeros Presolve removed 56 rows and 103 columns Presolve time: 0.01s Presolved: 79 rows, 510 columns, 1439 nonzeros Variable types: 0 continuous, 510 integer (266 binary) Found heuristic solution: objective 75.0000000 Found heuristic solution: objective 69.0000000 Optimize a model with 79 rows, 510 columns and 1439 nonzeros Presolved: 79 rows, 510 columns, 1439 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 8.540e+02 Factor NZ : 1.863e+03 Factor Ops : 5.299e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.15767526e+03 -1.77897542e+03 2.20e+03 1.64e-01 1.39e+01 0s 1 2.96126276e+02 -5.33273207e+02 3.55e+02 4.44e-16 2.42e+00 0s 2 1.04130994e+02 -1.27065291e+02 3.45e+01 1.33e-15 3.52e-01 0s 3 6.94289609e+01 1.81086312e+01 3.36e+00 2.78e-16 5.72e-02 0s 4 6.19438354e+01 4.40280440e+01 7.80e-01 2.36e-16 1.82e-02 0s 5 5.91842918e+01 5.04693930e+01 3.45e-01 2.43e-16 8.67e-03 0s 6 5.69425909e+01 5.36653178e+01 1.01e-01 2.89e-16 3.22e-03 0s 7 5.61392328e+01 5.51522258e+01 2.47e-02 3.33e-16 9.68e-04 0s 8 5.60151183e+01 5.59516072e+01 4.50e-04 3.33e-16 6.18e-05 0s 9 5.60000093e+01 5.59999781e+01 4.15e-07 3.33e-16 3.06e-08 0s 10 5.60000000e+01 5.60000000e+01 7.39e-14 3.53e-16 3.06e-11 0s 11 5.60000000e+01 5.60000000e+01 1.81e-13 2.85e-16 3.06e-14 0s Barrier solved model in 11 iterations and 0.01 seconds Optimal objective 5.60000000e+01 Root relaxation: objective 5.600000e+01, 266 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 56.0000000 56.00000 0.0% - 0s Explored 0 nodes (307 simplex iterations) in 0.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.02 seconds Total run time: 0.05 seconds Objective: 56 Solution: 2 x [69] 1 x [68] 2 x [67] 2 x [66] 1 x [65] 1 x [64] 1 x [2, 64] 2 x [1, 64] 1 x [4, 63] 1 x [3, 63] 1 x [62] 1 x [61] 1 x [5, 60] 1 x [59] 1 x [6, 58] 2 x [57] 1 x [7, 56] 1 x [8, 55] 1 x [8, 54] 1 x [10, 53] 1 x [12, 52] 1 x [15, 51] 1 x [13, 50] 2 x [16, 49] 1 x [14, 48] 1 x [17, 47] 1 x [18, 46] 1 x [17, 46] 1 x [19, 45] 1 x [21, 44] 1 x [21, 43] 1 x [7, 9, 43] 1 x [22, 42] 2 x [23, 41] 1 x [20, 40] 1 x [7, 13, 39] 1 x [38] 1 x [25, 38] 1 x [24, 38] 1 x [26, 37] 1 x [11, 12, 37] 1 x [28, 36] 2 x [29, 35] 1 x [27, 35] 2 x [30, 34] 1 x [31, 33] 1 x [28, 32]