Build (method = -2) #dp: 507 Step-3' Graph: 24 vertices and 125 arcs (0.00s) Step-4' Graph: 22 vertices and 121 arcs (0.00s) #V4/#V3 = 0.92 #A4/#A3 = 0.97 Ready! (0.00s) Optimize a model with 72 rows, 122 columns and 327 nonzeros Presolve removed 39 rows and 41 columns Presolve time: 0.00s Presolved: 33 rows, 81 columns, 202 nonzeros Variable types: 0 continuous, 81 integer (11 binary) Found heuristic solution: objective 91.0000000 Found heuristic solution: objective 84.0000000 Found heuristic solution: objective 68.0000000 Optimize a model with 33 rows, 81 columns and 202 nonzeros Presolved: 33 rows, 81 columns, 202 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 8.200e+01 Factor NZ : 3.810e+02 Factor Ops : 5.689e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.78354157e+02 -5.39811094e+02 4.40e+02 1.77e-01 2.93e+01 0s 1 1.81433231e+02 -1.95110426e+02 3.74e+01 6.66e-16 3.61e+00 0s 2 9.20974520e+01 2.81842599e+01 7.39e-01 5.55e-16 3.79e-01 0s 3 7.74752586e+01 5.17525837e+01 4.41e-02 6.38e-16 1.48e-01 0s 4 7.03725358e+01 6.31807088e+01 1.10e-02 7.77e-16 4.14e-02 0s 5 6.74643860e+01 6.65079622e+01 1.52e-03 4.44e-16 5.50e-03 0s 6 6.70011071e+01 6.69891284e+01 1.42e-06 4.44e-16 6.88e-05 0s 7 6.70000000e+01 6.70000000e+01 2.00e-12 6.66e-16 1.16e-10 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 6.70000000e+01 Root relaxation: objective 6.700000e+01, 23 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 67.0000000 67.00000 0.0% - 0s Explored 0 nodes (23 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.700000000000e+01, best bound 6.700000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 67 Solution: 2 x [50] 1 x [49] 1 x [48] 2 x [47] 1 x [46] 3 x [45] 1 x [44] 2 x [43] 1 x [42] 2 x [41] 1 x [40] 2 x [39] 1 x [38] 1 x [37] 1 x [36] 2 x [35] 2 x [34] 1 x [33] 2 x [1, 32] 1 x [2, 31] 1 x [4, 30] 1 x [2, 30] 4 x [29] 2 x [6, 28] 3 x [27] 1 x [5, 27] 1 x [7, 26] 1 x [5, 26] 3 x [3, 26] 3 x [9, 25] 2 x [10, 24] 2 x [11, 23] 1 x [11, 22] 2 x [13, 21] 1 x [13, 20] 2 x [14, 19] 2 x [15, 18] 1 x [14, 17] 1 x [14, 16] 2 x [10, 12] 1 x [8, 8]