Build (method = -2) #dp: 96 Step-3' Graph: 18 vertices and 56 arcs (0.00s) Step-4' Graph: 10 vertices and 40 arcs (0.00s) #V4/#V3 = 0.56 #A4/#A3 = 0.71 Ready! (0.00s) Optimize a model with 20 rows, 41 columns and 111 nonzeros Presolve removed 5 rows and 5 columns Presolve time: 0.00s Presolved: 15 rows, 36 columns, 98 nonzeros Variable types: 0 continuous, 36 integer (0 binary) Found heuristic solution: objective 998.0000000 Found heuristic solution: objective 855.0000000 Found heuristic solution: objective 757.0000000 Optimize a model with 15 rows, 36 columns and 98 nonzeros Presolved: 15 rows, 36 columns, 98 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.800e+01 Factor NZ : 1.200e+02 Factor Ops : 1.240e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.22595190e+03 -3.36741208e+03 1.45e+03 2.22e-16 1.75e+02 0s 1 8.59137595e+02 -1.06518661e+03 4.31e+01 7.77e-16 2.64e+01 0s 2 6.41564348e+02 6.83705819e+01 3.29e+00 1.89e-15 7.33e+00 0s 3 5.31786072e+02 4.09668111e+02 5.30e-03 5.55e-16 1.55e+00 0s 4 4.98978456e+02 4.84012648e+02 7.63e-04 2.26e-16 1.89e-01 0s 5 4.95790657e+02 4.95122300e+02 6.38e-05 2.27e-16 8.46e-03 0s 6 4.95500035e+02 4.95499933e+02 1.68e-08 2.22e-16 1.29e-06 0s 7 4.95500000e+02 4.95500000e+02 2.84e-13 3.88e-16 1.38e-12 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 4.95500000e+02 Root relaxation: objective 4.955000e+02, 17 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 495.50000 0 2 757.00000 495.50000 34.5% - 0s H 0 0 496.0000000 495.50000 0.10% - 0s Explored 0 nodes (21 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.960000000000e+02, best bound 4.960000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 496 Solution: 62 x [5, 10] 20 x [4] 111 x [1, 4] 61 x [2, 8] 1 x [9] 2 x [6, 9] 123 x [7, 9] 25 x [3, 9] 7 x [6, 8] 29 x [5, 6, 8] 46 x [6, 6] 9 x [3, 7]