Build (method = -2) #dp: 74 Step-3' Graph: 15 vertices and 47 arcs (0.00s) Step-4' Graph: 11 vertices and 39 arcs (0.00s) #V4/#V3 = 0.73 #A4/#A3 = 0.83 Ready! (0.00s) Optimize a model with 21 rows, 40 columns and 104 nonzeros Presolve removed 8 rows and 9 columns Presolve time: 0.00s Presolved: 13 rows, 31 columns, 81 nonzeros Variable types: 0 continuous, 31 integer (0 binary) Found heuristic solution: objective 999.0000000 Found heuristic solution: objective 765.0000000 Optimize a model with 13 rows, 31 columns and 81 nonzeros Presolved: 13 rows, 31 columns, 81 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 2.41363546e+03 -2.28428145e+03 3.33e+03 2.22e-16 1.87e+02 0s 1 1.02368206e+03 -2.25044084e+02 2.18e+02 2.22e-16 2.33e+01 0s 2 7.67824831e+02 4.02583372e+02 1.90e+01 2.22e-16 5.60e+00 0s 3 6.56537826e+02 6.02536853e+02 2.41e-01 2.22e-16 8.07e-01 0s 4 6.34671780e+02 6.24611508e+02 1.87e-02 1.33e-16 1.50e-01 0s 5 6.31039657e+02 6.30920585e+02 1.67e-04 2.22e-16 1.78e-03 0s 6 6.31000000e+02 6.30999999e+02 6.19e-10 2.13e-16 1.89e-08 0s 7 6.31000000e+02 6.31000000e+02 3.41e-13 2.84e-16 1.91e-14 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 6.31000000e+02 Root relaxation: objective 6.310000e+02, 12 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 631.0000000 631.00000 0.0% - 0s Explored 0 nodes (12 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.310000000000e+02, best bound 6.310000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 631 Solution: 105 x [2, 10] 70 x [8, 10] 187 x [7] 6 x [7, 8] 28 x [4, 7] 18 x [1] 25 x [1, 3] 57 x [5] 128 x [6, 9] 7 x [6, 6]