Build (method = -2) #dp: 3316 Step-3' Graph: 150 vertices and 442 arcs (0.02s) Step-4' Graph: 20 vertices and 182 arcs (0.02s) #V4/#V3 = 0.13 #A4/#A3 = 0.41 Ready! (0.02s) Optimize a model with 65 rows, 183 columns and 514 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 63 rows, 181 columns, 510 nonzeros Variable types: 0 continuous, 181 integer (18 binary) Found heuristic solution: objective 74.0000000 Optimize a model with 63 rows, 181 columns and 510 nonzeros Presolved: 63 rows, 181 columns, 510 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.980e+02 Factor NZ : 6.670e+02 Factor Ops : 1.207e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.21720441e+02 -4.21950102e+02 9.77e+01 4.29e-02 5.47e+00 0s 1 9.58582145e+01 -1.65593207e+02 4.26e-14 3.33e-16 6.73e-01 0s 2 4.99977384e+01 1.30705505e+01 1.22e-13 2.22e-16 9.28e-02 0s 3 4.01386667e+01 3.91230922e+01 2.02e-14 1.11e-16 2.53e-03 0s 4 4.00001408e+01 3.99991252e+01 2.71e-14 1.53e-16 2.53e-06 0s 5 4.00000000e+01 4.00000000e+01 2.95e-14 1.47e-16 2.53e-12 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 4.00000000e+01 Root relaxation: objective 4.000000e+01, 140 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 40.0000000 40.00000 0.0% - 0s Explored 0 nodes (140 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 40 Solution: 2 x [16, 37, 45] 1 x [9, 24, 44] 1 x [1, 3, 44] 1 x [11, 11, 43] 3 x [27, 41, 42] 3 x [12, 33, 40] 4 x [2, 36, 39] 1 x [9, 28, 38] 1 x [1, 16, 38] 1 x [17, 35, 35] 2 x [5, 25, 34] 1 x [9, 29, 32] 4 x [13, 20, 31] 3 x [8, 26, 30] 1 x [6, 21, 29] 1 x [2, 6, 23] 2 x [3, 10, 22] 1 x [14, 14, 20] 3 x [7, 18, 19] 3 x [4, 16, 18] 1 x [15, 15, 17]