Build (method = -2) #dp: 539 Step-3' Graph: 47 vertices and 132 arcs (0.00s) Step-4' Graph: 5 vertices and 48 arcs (0.00s) #V4/#V3 = 0.11 #A4/#A3 = 0.36 Ready! (0.00s) Optimize a model with 20 rows, 49 columns and 143 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 18 rows, 47 columns, 139 nonzeros Variable types: 0 continuous, 47 integer (0 binary) Found heuristic solution: objective 718.0000000 Found heuristic solution: objective 713.0000000 Optimize a model with 18 rows, 47 columns and 139 nonzeros Presolved: 18 rows, 47 columns, 139 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.800e+01 Factor NZ : 1.710e+02 Factor Ops : 2.109e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.57208615e+03 -1.95418441e+03 1.26e+02 1.11e-16 7.12e+01 0s 1 4.74475929e+02 -4.27898725e+02 5.85e+00 3.33e-16 9.70e+00 0s 2 2.73994852e+02 1.51212093e+02 1.32e-01 5.02e-15 1.13e+00 0s 3 2.41309893e+02 2.19010742e+02 1.54e-03 9.71e-16 2.05e-01 0s 4 2.39737641e+02 2.39407794e+02 9.80e-14 1.11e-16 3.03e-03 0s 5 2.39666676e+02 2.39666643e+02 4.07e-14 2.22e-16 3.01e-07 0s 6 2.39666667e+02 2.39666667e+02 6.73e-14 1.11e-16 3.02e-13 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.39666667e+02 Root relaxation: objective 2.396667e+02, 39 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 239.66667 0 4 713.00000 239.66667 66.4% - 0s H 0 0 240.0000000 239.66667 0.14% - 0s Explored 0 nodes (43 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.400000000000e+02, best bound 2.400000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 240 Solution: 6 x [2, 3, 12] 2 x [7, 10, 12] 20 x [7, 10, 14] 39 x [7, 9, 10] 40 x [7, 10, 15] 4 x [3, 5, 11] 6 x [5, 6, 7] 4 x [1, 3, 4] 1 x [7, 8] 29 x [7, 7, 8] 11 x [4, 7, 9] 78 x [7, 7, 13]