Build (method = -2) #dp: 18695 Step-3' Graph: 154 vertices and 511 arcs (0.10s) Step-4' Graph: 59 vertices and 321 arcs (0.10s) #V4/#V3 = 0.38 #A4/#A3 = 0.63 Ready! (0.10s) Optimize a model with 79 rows, 322 columns and 857 nonzeros Presolve removed 9 rows and 17 columns Presolve time: 0.00s Presolved: 70 rows, 305 columns, 829 nonzeros Variable types: 0 continuous, 305 integer (0 binary) Found heuristic solution: objective 1765.0000000 Optimize a model with 70 rows, 305 columns and 829 nonzeros Presolved: 70 rows, 305 columns, 829 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.440e+02 Factor NZ : 1.260e+03 Factor Ops : 2.563e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.38150937e+04 -8.61942820e+04 4.85e+04 2.22e-16 9.56e+02 0s 1 5.11793163e+03 -2.97395811e+04 5.43e+03 8.88e-16 1.29e+02 0s 2 1.87227432e+03 -9.28948553e+03 5.13e+02 1.22e-15 2.25e+01 0s 3 9.74624871e+02 -1.74056995e+03 1.07e+00 5.55e-16 4.31e+00 0s 4 5.82603536e+02 -5.78148528e+02 3.03e-01 2.78e-16 1.84e+00 0s 5 4.04481563e+02 6.54784360e+00 1.19e-01 2.22e-16 6.32e-01 0s 6 3.75164610e+02 1.52796384e+02 7.30e-02 2.41e-16 3.53e-01 0s 7 3.51981709e+02 2.32005534e+02 3.14e-02 1.72e-16 1.90e-01 0s 8 3.40464109e+02 3.29106452e+02 7.09e-03 3.47e-16 1.80e-02 0s 9 3.33379123e+02 3.33100005e+02 8.63e-06 2.22e-16 4.43e-04 0s 10 3.33333379e+02 3.33333100e+02 5.39e-13 2.22e-16 4.43e-07 0s 11 3.33333333e+02 3.33333333e+02 1.99e-13 2.22e-16 4.43e-10 0s Barrier solved model in 11 iterations and 0.00 seconds Optimal objective 3.33333333e+02 Root relaxation: objective 3.333333e+02, 215 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 333.33333 0 11 1765.00000 333.33333 81.1% - 0s H 0 0 334.0000000 333.33333 0.20% - 0s Explored 0 nodes (308 simplex iterations) in 0.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.340000000000e+02, best bound 3.340000000000e+02, gap 0.0% Preprocessing time: 0.10 seconds Gurobi run time: 0.02 seconds Total run time: 0.12 seconds Objective: 334 Solution: 2 x [2, 8, 10, 10, 16, 19] 10 x [2, 7, 10, 10, 12, 16] 38 x [1, 2, 10, 12, 12, 15] 69 x [1, 6, 6, 10, 13, 16] 1 x [13, 14, 16, 17] 5 x [3, 5, 16, 17, 17, 18] 2 x [3, 5, 9, 14, 18, 20] 16 x [9, 10, 14, 17, 19, 20] 29 x [1, 5, 14, 17, 17, 20] 3 x [3, 14, 15, 17, 17, 20] 63 x [7, 9, 11, 14, 14, 20] 1 x [7, 9, 14, 14, 15, 20] 1 x [4, 5, 7, 8, 12] 79 x [4, 4, 5, 7, 8, 12] 4 x [5, 8, 10, 12, 16, 19] 10 x [1, 7, 8, 12, 15, 16] 1 x [7, 10, 10, 15, 16]