Build (method = -2) #dp: 3523 Step-3' Graph: 157 vertices and 462 arcs (0.02s) Step-4' Graph: 16 vertices and 180 arcs (0.02s) #V4/#V3 = 0.10 #A4/#A3 = 0.39 Ready! (0.02s) Optimize a model with 64 rows, 181 columns and 517 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 62 rows, 179 columns, 513 nonzeros Variable types: 0 continuous, 179 integer (45 binary) Found heuristic solution: objective 104.0000000 Found heuristic solution: objective 100.0000000 Optimize a model with 62 rows, 179 columns and 513 nonzeros Presolved: 62 rows, 179 columns, 513 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.910e+02 Factor NZ : 6.590e+02 Factor Ops : 1.202e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.10343188e+02 -3.30109054e+02 5.50e+01 2.89e-02 3.81e+00 0s 1 7.18508289e+01 -1.28590602e+02 2.63e-13 4.44e-16 5.30e-01 0s 2 4.48706635e+01 2.84669642e+01 5.11e-14 2.22e-16 4.22e-02 0s 3 4.00371829e+01 3.97699575e+01 7.07e-14 4.44e-16 6.83e-04 0s 4 4.00000376e+01 3.99997703e+01 7.33e-14 1.58e-16 6.83e-07 0s 5 4.00000000e+01 4.00000000e+01 2.70e-14 3.33e-16 6.83e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 4.00000000e+01 Root relaxation: objective 4.000000e+01, 143 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 (143 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: 0.04 seconds Objective: 40 Solution: 1 x [27, 46, 48] 4 x [6, 42, 48] 1 x [25, 38, 47] 1 x [1, 10, 46] 1 x [37, 45, 45] 3 x [16, 40, 44] 1 x [33, 33, 43] 4 x [15, 31, 41] 1 x [16, 20, 41] 2 x [1, 9, 39] 3 x [8, 22, 36] 1 x [7, 15, 35] 4 x [11, 12, 34] 2 x [19, 26, 32] 1 x [5, 8, 30] 2 x [21, 23, 29] 1 x [4, 6, 28] 1 x [2, 3, 24] 3 x [7, 17, 18] 3 x [2, 13, 14]