Build (method = -2) #dp: 2682 Step-3' Graph: 134 vertices and 393 arcs (0.02s) Step-4' Graph: 16 vertices and 157 arcs (0.02s) #V4/#V3 = 0.12 #A4/#A3 = 0.40 Ready! (0.02s) Optimize a model with 57 rows, 158 columns and 448 nonzeros Presolve removed 3 rows and 3 columns Presolve time: 0.00s Presolved: 54 rows, 155 columns, 441 nonzeros Variable types: 0 continuous, 155 integer (42 binary) Found heuristic solution: objective 86.0000000 Found heuristic solution: objective 85.0000000 Optimize a model with 54 rows, 155 columns and 441 nonzeros Presolved: 54 rows, 155 columns, 441 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.670e+02 Factor NZ : 6.270e+02 Factor Ops : 1.189e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.51405086e+02 -2.72719660e+02 5.27e+01 3.35e-02 3.58e+00 0s 1 5.88236273e+01 -1.01962091e+02 3.91e-14 3.33e-16 4.94e-01 0s 2 3.68214436e+01 2.35646827e+01 9.59e-14 2.22e-16 3.97e-02 0s 3 3.33527062e+01 3.31828778e+01 3.89e-14 2.22e-16 5.05e-04 0s 4 3.33333528e+01 3.33331830e+01 7.99e-15 1.11e-16 5.05e-07 0s 5 3.33333333e+01 3.33333333e+01 7.98e-14 7.95e-17 5.05e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 114 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 3 85.00000 33.33333 60.8% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (148 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: 1 x [26, 31, 41] 1 x [40] 1 x [8, 8, 40] 3 x [10, 38, 39] 1 x [22, 22, 39] 2 x [18, 35, 37] 1 x [27, 27, 37] 2 x [6, 9, 36] 2 x [11, 23, 34] 1 x [21, 28, 33] 1 x [15, 23, 32] 2 x [20, 25, 30] 1 x [14, 19, 29] 4 x [24, 25, 26] 4 x [4, 18, 19] 4 x [1, 16, 17] 1 x [6, 6, 13] 1 x [3, 5, 12] 1 x [1, 2, 7]