Build (method = -2) #dp: 1837 Step-3' Graph: 108 vertices and 357 arcs (0.01s) Step-4' Graph: 67 vertices and 275 arcs (0.01s) #V4/#V3 = 0.62 #A4/#A3 = 0.77 Ready! (0.01s) Optimize a model with 76 rows, 276 columns and 704 nonzeros Presolve removed 13 rows and 26 columns Presolve time: 0.00s Presolved: 63 rows, 250 columns, 658 nonzeros Variable types: 0 continuous, 250 integer (0 binary) Found heuristic solution: objective 997.0000000 Found heuristic solution: objective 921.0000000 Optimize a model with 63 rows, 250 columns and 658 nonzeros Presolved: 63 rows, 250 columns, 658 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.820e+02 Factor NZ : 1.102e+03 Factor Ops : 2.270e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.19134729e+03 -3.05149623e+04 2.53e+04 1.11e-16 3.38e+02 0s 1 1.45354418e+03 -1.31830887e+04 3.46e+03 5.55e-16 5.76e+01 0s 2 8.19491334e+02 -3.22568847e+03 3.84e+02 5.27e-16 9.82e+00 0s 3 3.94105184e+02 -4.61584174e+02 3.38e-13 3.33e-16 1.68e+00 0s 4 2.18224965e+02 -8.41852820e+01 1.56e-13 3.23e-16 5.94e-01 0s 5 1.64502161e+02 4.62695996e+01 9.61e-14 2.65e-16 2.32e-01 0s 6 1.52765918e+02 1.12322385e+02 4.17e-13 2.44e-16 7.95e-02 0s 7 1.43803960e+02 1.40289587e+02 2.53e-13 2.22e-16 6.90e-03 0s 8 1.42858416e+02 1.42854579e+02 1.96e-13 1.87e-16 7.54e-06 0s 9 1.42857143e+02 1.42857143e+02 1.26e-13 3.33e-16 7.56e-12 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 1.42857143e+02 Root relaxation: objective 1.428571e+02, 144 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 142.85714 0 15 921.00000 142.85714 84.5% - 0s H 0 0 143.0000000 142.85714 0.10% - 0s Explored 0 nodes (204 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.430000000000e+02, best bound 1.430000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 143 Solution: 23 x [1, 1, 4, 5, 6, 6, 7] 41 x [1, 1, 2, 4, 4, 6, 7] 1 x [2, 2, 3, 5, 8, 8] 3 x [2, 2, 3, 5, 6, 7, 7] 6 x [1, 1, 3, 5, 6, 7, 7] 33 x [2, 2, 3, 5, 5, 8, 9] 24 x [2, 3, 5, 5, 8, 8, 9] 12 x [1, 1, 3, 5, 5, 6, 7]