Build (method = -2) #dp: 83 Step-3' Graph: 21 vertices and 56 arcs (0.00s) Step-4' Graph: 14 vertices and 42 arcs (0.00s) #V4/#V3 = 0.67 #A4/#A3 = 0.75 Ready! (0.00s) Optimize a model with 24 rows, 43 columns and 105 nonzeros Presolve removed 11 rows and 16 columns Presolve time: 0.00s Presolved: 13 rows, 27 columns, 67 nonzeros Variable types: 0 continuous, 27 integer (0 binary) Found heuristic solution: objective 840.0000000 Found heuristic solution: objective 671.0000000 Optimize a model with 13 rows, 27 columns and 67 nonzeros Presolved: 13 rows, 27 columns, 67 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.500e+01 Factor NZ : 9.100e+01 Factor Ops : 8.190e+02 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.80280232e+02 -7.74403792e+02 9.01e+02 1.11e-16 7.19e+01 0s 1 7.14901174e+02 1.83519348e+02 1.24e+01 3.33e-16 9.50e+00 0s 2 6.67814881e+02 4.41928485e+02 2.61e-01 1.67e-16 3.90e+00 0s 3 6.40438471e+02 5.92899334e+02 9.18e-03 1.25e-16 8.20e-01 0s 4 6.27436675e+02 6.23603235e+02 4.38e-04 1.11e-16 6.61e-02 0s 5 6.26000986e+02 6.25997353e+02 9.61e-07 1.11e-16 6.26e-05 0s 6 6.26000000e+02 6.26000000e+02 1.18e-12 2.22e-16 6.27e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 6.26000000e+02 Root relaxation: objective 6.260000e+02, 17 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 626.0000000 626.00000 0.0% - 0s Explored 0 nodes (17 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.260000000000e+02, best bound 6.260000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 626 Solution: 232 x [1] 83 x [2, 6] 8 x [2, 7] 81 x [3] 75 x [3, 6] 60 x [3, 8] 15 x [3, 8, 9, 10] 1 x [3, 9, 10] 7 x [3, 10] 8 x [4] 37 x [4, 5] 19 x [4, 6, 9, 10]