Build (method = -2) #dp: 1790 Step-3' Graph: 83 vertices and 259 arcs (0.01s) Step-4' Graph: 16 vertices and 125 arcs (0.01s) #V4/#V3 = 0.19 #A4/#A3 = 0.48 Ready! (0.01s) Optimize a model with 74 rows, 126 columns and 350 nonzeros Presolve removed 44 rows and 57 columns Presolve time: 0.00s Presolved: 30 rows, 69 columns, 177 nonzeros Variable types: 0 continuous, 69 integer (9 binary) Found heuristic solution: objective 74.0000000 Found heuristic solution: objective 68.0000000 Found heuristic solution: objective 52.0000000 Optimize a model with 30 rows, 69 columns and 177 nonzeros Presolved: 30 rows, 69 columns, 177 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.700e+01 Factor NZ : 4.650e+02 Factor Ops : 9.455e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.66823066e+02 -8.19783243e+02 1.07e+02 4.44e-16 3.40e+01 0s 1 2.12493773e+02 -2.56315525e+02 1.33e+01 1.33e-15 5.14e+00 0s 2 7.27086751e+01 -1.47066420e+01 8.88e-15 2.22e-15 5.64e-01 0s 3 5.33643269e+01 2.64932087e+01 2.08e-14 8.88e-16 1.73e-01 0s 4 5.01414976e+01 4.87276610e+01 8.57e-14 5.49e-16 9.12e-03 0s 5 5.00000534e+01 4.99996773e+01 1.69e-14 9.99e-16 2.43e-06 0s 6 5.00000000e+01 5.00000000e+01 8.97e-14 9.99e-16 2.47e-12 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 37 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 50.0000000 50.00000 0.0% - 0s Explored 0 nodes (37 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 50 Solution: 2 x [21, 58] 1 x [24, 57] 1 x [22, 56] 2 x [26, 55] 1 x [27, 54] 3 x [19, 53] 2 x [12, 52] 1 x [28, 51] 2 x [7, 50] 2 x [4, 49] 1 x [31, 48] 1 x [16, 48] 3 x [10, 47] 1 x [11, 46] 2 x [34, 45] 4 x [15, 44] 1 x [3, 44] 2 x [38, 43] 3 x [23, 42] 1 x [2, 42] 1 x [1, 41] 1 x [41, 41] 1 x [39, 40] 1 x [9, 37] 1 x [8, 36] 1 x [5, 35] 1 x [13, 33] 1 x [30, 32] 1 x [17, 29] 1 x [20, 27] 2 x [14, 25] 2 x [6, 18]