Build (method = -2) #dp: 456 Step-3' Graph: 77 vertices and 256 arcs (0.00s) Step-4' Graph: 70 vertices and 242 arcs (0.00s) #V4/#V3 = 0.91 #A4/#A3 = 0.95 Ready! (0.00s) Optimize a model with 80 rows, 243 columns and 609 nonzeros Presolve removed 23 rows and 40 columns Presolve time: 0.00s Presolved: 57 rows, 203 columns, 537 nonzeros Variable types: 0 continuous, 203 integer (0 binary) Found heuristic solution: objective 996.0000000 Optimize a model with 57 rows, 203 columns and 537 nonzeros Presolved: 57 rows, 203 columns, 537 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.970e+02 Factor NZ : 9.460e+02 Factor Ops : 1.794e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.88746858e+03 -1.10265522e+04 9.17e+03 1.11e-16 1.38e+02 0s 1 9.09868508e+02 -5.03286732e+03 9.17e+02 3.00e-15 2.30e+01 0s 2 6.72431526e+02 -6.62899416e+02 7.42e+01 2.16e-15 3.59e+00 0s 3 5.36483522e+02 1.55960342e+02 3.11e+00 2.22e-15 9.32e-01 0s 4 4.65801378e+02 3.40672063e+02 7.14e-02 2.47e-15 3.04e-01 0s 5 4.47922743e+02 4.18139112e+02 2.75e-02 2.14e-15 7.23e-02 0s 6 4.36161336e+02 4.31968648e+02 2.63e-03 1.66e-15 1.02e-02 0s 7 4.35014177e+02 4.34967722e+02 2.84e-13 2.66e-15 1.13e-04 0s 8 4.35000014e+02 4.34999968e+02 1.71e-13 2.92e-15 1.13e-07 0s 9 4.35000000e+02 4.35000000e+02 2.35e-13 1.87e-15 1.17e-13 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 4.35000000e+02 Root relaxation: objective 4.350000e+02, 63 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 435.0000000 435.00000 0.0% - 0s Explored 0 nodes (63 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.350000000000e+02, best bound 4.350000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 435 Solution: 4 x [4] 15 x [4, 5, 9] 15 x [4, 9] 59 x [6, 8] 54 x [2, 8] 68 x [1, 2, 8] 51 x [2, 8, 9] 13 x [3, 7] 73 x [3, 10] 83 x [10, 10]