Build (method = -2) #dp: 1005 Step-3' Graph: 46 vertices and 162 arcs (0.00s) Step-4' Graph: 23 vertices and 116 arcs (0.00s) #V4/#V3 = 0.50 #A4/#A3 = 0.72 Ready! (0.00s) Optimize a model with 77 rows, 117 columns and 310 nonzeros Presolve removed 46 rows and 47 columns Presolve time: 0.00s Presolved: 31 rows, 70 columns, 170 nonzeros Variable types: 0 continuous, 70 integer (11 binary) Found heuristic solution: objective 85.0000000 Found heuristic solution: objective 75.0000000 Optimize a model with 31 rows, 70 columns and 170 nonzeros Presolve removed 1 rows and 1 columns Presolved: 30 rows, 69 columns, 168 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.700e+01 Factor NZ : 2.700e+02 Factor Ops : 3.020e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.05477677e+03 -1.06422522e+03 5.77e+01 2.22e-16 3.85e+01 0s 1 2.59650173e+02 -2.68882888e+02 9.06e+00 2.00e-15 5.49e+00 0s 2 9.00258104e+01 1.49228522e+01 9.24e-14 8.22e-15 5.07e-01 0s 3 7.53266466e+01 5.24386978e+01 2.49e-14 2.86e-15 1.55e-01 0s 4 6.61647090e+01 6.17896108e+01 1.58e-14 1.89e-15 2.96e-02 0s 5 6.50475121e+01 6.48896413e+01 2.40e-14 2.11e-15 1.07e-03 0s 6 6.50000059e+01 6.49999886e+01 6.79e-14 3.77e-15 1.17e-07 0s 7 6.50000000e+01 6.50000000e+01 9.16e-13 5.77e-15 1.19e-13 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 6.50000000e+01 Root relaxation: objective 6.500000e+01, 31 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 65.0000000 65.00000 0.0% - 0s Explored 0 nodes (31 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.500000000000e+01, best bound 6.500000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 65 Solution: 4 x [54] 1 x [53] 1 x [52] 1 x [51] 1 x [50] 3 x [49] 1 x [48] 2 x [1, 47] 4 x [46] 2 x [3, 45] 3 x [44] 1 x [5, 43] 1 x [6, 42] 3 x [41] 3 x [40] 1 x [8, 39] 2 x [2, 38] 1 x [9, 37] 1 x [36] 1 x [7, 36] 1 x [4, 35] 1 x [10, 34] 1 x [3, 34] 1 x [11, 33] 2 x [12, 32] 4 x [31] 3 x [14, 30] 1 x [13, 30] 1 x [11, 29] 1 x [17, 28] 2 x [15, 27] 1 x [18, 26] 2 x [16, 26] 2 x [19, 25] 2 x [20, 24] 1 x [21, 23] 1 x [1, 23] 1 x [22, 22]