Build (method = -2) #dp: 60 Step-3' Graph: 14 vertices and 43 arcs (0.00s) Step-4' Graph: 9 vertices and 33 arcs (0.00s) #V4/#V3 = 0.64 #A4/#A3 = 0.77 Ready! (0.00s) Optimize a model with 18 rows, 34 columns and 90 nonzeros Presolve removed 6 rows and 7 columns Presolve time: 0.00s Presolved: 12 rows, 27 columns, 72 nonzeros Variable types: 0 continuous, 27 integer (0 binary) Found heuristic solution: objective 999.0000000 Found heuristic solution: objective 933.0000000 Optimize a model with 12 rows, 27 columns and 72 nonzeros Presolved: 12 rows, 27 columns, 72 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.200e+01 Factor NZ : 7.800e+01 Factor Ops : 6.500e+02 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.54608552e+03 -1.30114248e+03 1.20e+03 2.22e-16 9.95e+01 0s 1 8.22185504e+02 4.85560147e+01 1.17e-12 3.05e-16 1.32e+01 0s 2 6.81457709e+02 4.99492985e+02 3.55e-14 2.50e-16 3.09e+00 0s 3 6.20679707e+02 6.11141432e+02 7.82e-14 2.22e-16 1.62e-01 0s 4 6.17593785e+02 6.17003965e+02 3.86e-13 1.11e-16 1.00e-02 0s 5 6.17500392e+02 6.17499816e+02 9.91e-13 4.44e-16 9.76e-06 0s 6 6.17500000e+02 6.17500000e+02 1.28e-12 2.22e-16 1.83e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 6.17500000e+02 Root relaxation: objective 6.175000e+02, 11 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 617.50000 0 2 933.00000 617.50000 33.8% - 0s H 0 0 618.0000000 617.50000 0.08% - 0s Explored 0 nodes (11 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.180000000000e+02, best bound 6.180000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 618 Solution: 220 x [8] 22 x [2] 180 x [5, 6] 57 x [3, 5] 8 x [1, 7] 53 x [4, 9] 21 x [9, 9] 6 x [3, 6, 7] 50 x [7, 7] 1 x [3, 6]