Build (method = -2) #dp: 16829 Step-3' Graph: 130 vertices and 393 arcs (0.09s) Step-4' Graph: 33 vertices and 199 arcs (0.09s) #V4/#V3 = 0.25 #A4/#A3 = 0.51 Ready! (0.09s) Optimize a model with 53 rows, 200 columns and 543 nonzeros Presolve removed 7 rows and 13 columns Presolve time: 0.00s Presolved: 46 rows, 187 columns, 517 nonzeros Variable types: 0 continuous, 187 integer (0 binary) Found heuristic solution: objective 1999.0000000 Found heuristic solution: objective 1838.0000000 Optimize a model with 46 rows, 187 columns and 517 nonzeros Presolved: 46 rows, 187 columns, 517 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.400e+02 Factor NZ : 6.520e+02 Factor Ops : 1.077e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.97777356e+04 -4.28013521e+04 1.85e+04 1.11e-16 7.86e+02 0s 1 4.00700618e+03 -1.70889099e+04 1.70e+03 5.55e-16 1.01e+02 0s 2 1.42244841e+03 -4.12751092e+03 2.01e+01 1.33e-15 1.44e+01 0s 3 7.71788707e+02 -5.36227195e+02 4.45e-02 3.89e-16 3.32e+00 0s 4 4.11646291e+02 -4.91191410e+01 5.24e-03 1.60e-16 1.17e+00 0s 5 3.63494382e+02 2.44837088e+02 2.24e-03 1.80e-16 3.01e-01 0s 6 3.33999924e+02 3.30179223e+02 5.10e-06 4.44e-16 9.70e-03 0s 7 3.33333496e+02 3.33332808e+02 2.46e-11 2.39e-16 1.75e-06 0s 8 3.33333333e+02 3.33333333e+02 3.78e-13 2.53e-16 1.75e-09 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 3.33333333e+02 Root relaxation: objective 3.333333e+02, 137 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 333.33333 0 7 1838.00000 333.33333 81.9% - 0s H 0 0 335.0000000 333.33333 0.50% - 0s H 0 0 334.0000000 333.33333 0.20% - 0s Explored 0 nodes (184 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.340000000000e+02, best bound 3.340000000000e+02, gap 0.0% Preprocessing time: 0.09 seconds Gurobi run time: 0.01 seconds Total run time: 0.10 seconds Objective: 334 Solution: 60 x [3, 4, 8, 11, 13, 18] 1 x [3, 5, 11, 20, 20] 29 x [3, 5, 11, 11, 11, 14] 17 x [1, 10, 13, 16, 17, 19] 16 x [1, 4, 5, 11, 11, 20] 1 x [1, 5, 6, 10, 12] 3 x [1, 5, 9, 10, 12, 20] 135 x [1, 2, 5, 9, 14, 16] 1 x [6, 11, 12, 14] 7 x [6, 8, 11, 11, 15, 19] 6 x [6, 11, 11, 16, 17, 19] 7 x [6, 8, 9, 14, 15, 19] 51 x [7, 8, 9, 10, 12, 15]