Build (method = -2) #dp: 992 Step-3' Graph: 38 vertices and 189 arcs (0.01s) Step-4' Graph: 6 vertices and 125 arcs (0.01s) #V4/#V3 = 0.16 #A4/#A3 = 0.66 Ready! (0.01s) Optimize a model with 46 rows, 126 columns and 372 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 44 rows, 124 columns, 368 nonzeros Variable types: 0 continuous, 124 integer (6 binary) Found heuristic solution: objective 206.0000000 Optimize a model with 44 rows, 124 columns and 368 nonzeros Presolved: 44 rows, 124 columns, 368 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.270e+02 Factor NZ : 5.770e+02 Factor Ops : 1.164e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.73597421e+02 -5.89223565e+02 3.65e+01 1.09e-02 1.19e+01 0s 1 1.50062695e+02 -2.63000610e+02 2.99e-01 2.55e-15 1.54e+00 0s 2 1.01125646e+02 -3.48500534e+01 1.14e-02 2.00e-15 4.85e-01 0s 3 7.30430796e+01 6.08494067e+01 5.92e-14 9.16e-16 4.26e-02 0s 4 7.00814337e+01 6.98009389e+01 1.55e-14 7.77e-16 9.81e-04 0s 5 7.00000056e+01 6.99999855e+01 6.30e-14 1.69e-15 7.03e-08 0s 6 7.00000000e+01 7.00000000e+01 3.76e-14 1.89e-15 7.03e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 7.00000000e+01 Root relaxation: objective 7.000000e+01, 105 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 70.0000000 70.00000 0.0% - 0s Explored 0 nodes (105 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 7.000000000000e+01, best bound 7.000000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 70 Solution: 2 x [18, 30, 32] 4 x [23, 37, 39] 1 x [14, 31, 38] 5 x [17, 24, 33] 2 x [5, 22, 31] 5 x [3, 6, 21] 7 x [10, 19, 34] 3 x [7, 9, 40] 3 x [15, 16, 28] 7 x [11, 25, 38] 1 x [1, 4, 11] 2 x [2, 4, 5] 9 x [20, 27, 36] 10 x [13, 26, 35] 1 x [12, 24, 37] 6 x [8, 29, 31] 1 x [3, 7, 12] 1 x [12, 18, 31]