Build (method = -2) #dp: 3209 Step-3' Graph: 154 vertices and 453 arcs (0.03s) Step-4' Graph: 23 vertices and 191 arcs (0.03s) #V4/#V3 = 0.15 #A4/#A3 = 0.42 Ready! (0.03s) Optimize a model with 68 rows, 192 columns and 536 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 66 rows, 190 columns, 532 nonzeros Variable types: 0 continuous, 190 integer (33 binary) Found heuristic solution: objective 83.0000000 Optimize a model with 66 rows, 190 columns and 532 nonzeros Presolved: 66 rows, 190 columns, 532 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.100e+02 Factor NZ : 6.810e+02 Factor Ops : 1.214e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.57767008e+02 -2.91246927e+02 7.07e+01 4.68e-02 3.25e+00 0s 1 6.18229537e+01 -1.20106675e+02 3.48e-13 2.22e-16 4.52e-01 0s 2 3.85328586e+01 2.06326984e+01 5.73e-14 2.22e-16 4.34e-02 0s 3 3.33696722e+01 3.30711904e+01 1.44e-14 2.22e-16 7.21e-04 0s 4 3.33333702e+01 3.33330717e+01 2.69e-14 1.41e-16 7.21e-07 0s 5 3.33333333e+01 3.33333333e+01 4.83e-14 2.22e-16 7.21e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 130 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.33333 0 4 83.00000 33.33333 59.8% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (161 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.01 seconds Total run time: 0.04 seconds Objective: 34 Solution: 2 x [27, 31, 45] 1 x [26, 39, 44] 1 x [9, 9, 43] 1 x [19, 38, 42] 1 x [3, 4, 42] 1 x [14, 14, 41] 3 x [29, 32, 40] 1 x [3, 7, 39] 2 x [11, 35, 37] 2 x [1, 34, 36] 2 x [12, 13, 33] 2 x [2, 16, 30] 1 x [24, 24, 28] 3 x [19, 23, 25] 1 x [10, 17, 23] 4 x [15, 17, 22] 3 x [5, 8, 21] 1 x [6, 11, 20] 1 x [1, 3, 18] 1 x [7]