Build (method = -2) #dp: 2385 Step-3' Graph: 91 vertices and 288 arcs (0.01s) Step-4' Graph: 21 vertices and 148 arcs (0.01s) #V4/#V3 = 0.23 #A4/#A3 = 0.51 Ready! (0.01s) Optimize a model with 89 rows, 149 columns and 409 nonzeros Presolve removed 56 rows and 68 columns Presolve time: 0.00s Presolved: 33 rows, 81 columns, 201 nonzeros Variable types: 0 continuous, 81 integer (13 binary) Found heuristic solution: objective 67.0000000 Found heuristic solution: objective 52.0000000 Optimize a model with 33 rows, 81 columns and 201 nonzeros Presolved: 33 rows, 81 columns, 201 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.300e+01 Factor NZ : 5.020e+02 Factor Ops : 1.043e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.12374135e+03 -1.33539039e+03 1.67e+02 2.22e-16 4.19e+01 0s 1 2.82570489e+02 -3.65389324e+02 2.43e+01 7.77e-16 6.57e+00 0s 2 7.60541533e+01 -3.28844827e+01 1.69e-14 6.00e-15 6.19e-01 0s 3 5.59315545e+01 2.49392249e+01 3.13e-13 2.78e-15 1.76e-01 0s 4 5.02268498e+01 4.76934300e+01 5.10e-14 8.98e-16 1.44e-02 0s 5 5.00002531e+01 4.99981224e+01 3.05e-14 8.36e-16 1.21e-05 0s 6 5.00000000e+01 5.00000000e+01 4.00e-15 1.22e-15 1.24e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 39 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 (39 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: 0.02 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 50 Solution: 2 x [13, 68] 2 x [4, 67] 1 x [19, 66] 1 x [18, 65] 1 x [15, 64] 1 x [22, 63] 1 x [21, 62] 1 x [20, 61] 1 x [12, 60] 3 x [17, 59] 1 x [28, 58] 1 x [7, 57] 1 x [5, 56] 3 x [16, 55] 1 x [32, 54] 1 x [33, 53] 3 x [9, 52] 2 x [27, 51] 1 x [40, 50] 2 x [42, 49] 3 x [31, 49] 1 x [39, 48] 1 x [43, 47] 1 x [1, 47] 1 x [44, 46] 1 x [44, 45] 1 x [38, 41] 2 x [23, 37] 1 x [3, 36] 1 x [2, 35] 1 x [2, 34] 1 x [6, 30] 1 x [10, 29] 1 x [8, 28] 1 x [11, 26] 1 x [14, 25] 1 x [20, 24]