Build (method = -2) #dp: 2774 Step-3' Graph: 72 vertices and 239 arcs (0.01s) Step-4' Graph: 23 vertices and 141 arcs (0.01s) #V4/#V3 = 0.32 #A4/#A3 = 0.59 Ready! (0.01s) Optimize a model with 43 rows, 142 columns and 387 nonzeros Presolve removed 5 rows and 9 columns Presolve time: 0.00s Presolved: 38 rows, 133 columns, 372 nonzeros Variable types: 0 continuous, 133 integer (0 binary) Found heuristic solution: objective 836.0000000 Found heuristic solution: objective 677.0000000 Optimize a model with 38 rows, 133 columns and 372 nonzeros Presolved: 38 rows, 133 columns, 372 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.800e+02 Factor NZ : 4.380e+02 Factor Ops : 5.888e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.98520718e+03 -1.36857229e+04 4.22e+03 1.11e-16 3.31e+02 0s 1 1.98392600e+03 -4.97574040e+03 4.35e+02 8.88e-16 4.50e+01 0s 2 6.30086272e+02 -1.08071302e+03 6.51e+00 1.90e-14 6.14e+00 0s 3 2.96994305e+02 -4.62924438e+01 3.60e-01 2.33e-15 1.20e+00 0s 4 2.29778647e+02 1.16211734e+02 9.31e-02 9.99e-16 3.97e-01 0s 5 2.11622112e+02 2.04399660e+02 9.90e-03 5.12e-16 2.52e-02 0s 6 2.09250946e+02 2.09249271e+02 4.46e-06 6.35e-16 5.84e-06 0s 7 2.09250000e+02 2.09250000e+02 4.56e-12 4.77e-16 5.91e-12 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 2.09250000e+02 Root relaxation: objective 2.092500e+02, 93 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 209.25000 0 5 677.00000 209.25000 69.1% - 0s H 0 0 210.0000000 209.25000 0.36% - 0s Explored 0 nodes (157 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.100000000000e+02, best bound 2.100000000000e+02, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 210 Solution: 3 x [3, 7, 12, 19] 9 x [3, 6, 10, 12] 4 x [4, 7, 8, 12] 65 x [7, 13, 18, 20] 1 x [6, 20] 4 x [1, 6, 16, 20] 1 x [6, 8, 13, 20] 17 x [2, 7, 13, 14] 20 x [4, 11, 14, 17] 11 x [6, 8, 14, 17] 32 x [5, 6, 8, 15] 25 x [2, 6, 9, 15] 1 x [2, 13, 19] 1 x [2, 13, 15, 17] 4 x [2, 6, 6, 15] 12 x [1, 2, 2, 16]