Build (method = -2) #dp: 936 Step-3' Graph: 60 vertices and 187 arcs (0.00s) Step-4' Graph: 22 vertices and 111 arcs (0.00s) #V4/#V3 = 0.37 #A4/#A3 = 0.59 Ready! (0.00s) Optimize a model with 31 rows, 112 columns and 301 nonzeros Presolve removed 2 rows and 3 columns Presolve time: 0.00s Presolved: 29 rows, 109 columns, 295 nonzeros Variable types: 0 continuous, 109 integer (0 binary) Found heuristic solution: objective 866.0000000 Optimize a model with 29 rows, 109 columns and 295 nonzeros Presolved: 29 rows, 109 columns, 295 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.460e+02 Factor NZ : 3.550e+02 Factor Ops : 5.275e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.65384539e+03 -1.49643797e+04 7.12e+03 2.22e-16 4.19e+02 0s 1 1.35763209e+03 -7.00096939e+03 7.02e+02 6.66e-16 6.10e+01 0s 2 6.03520666e+02 -7.88764854e+02 2.30e+00 3.89e-16 6.16e+00 0s 3 2.47778458e+02 -5.01763072e+01 3.49e-01 3.33e-16 1.31e+00 0s 4 1.95584116e+02 5.83619225e+01 1.97e-01 3.33e-16 6.05e-01 0s 5 1.75353705e+02 1.35258573e+02 6.92e-02 5.55e-16 1.77e-01 0s 6 1.67121063e+02 1.65549259e+02 2.22e-03 2.37e-16 6.93e-03 0s 7 1.66666682e+02 1.66666600e+02 9.17e-08 3.38e-16 3.60e-07 0s 8 1.66666667e+02 1.66666667e+02 4.71e-13 3.08e-16 3.60e-10 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 1.66666667e+02 Root relaxation: objective 1.666667e+02, 73 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 166.66667 0 12 866.00000 166.66667 80.8% - 0s H 0 0 169.0000000 166.66667 1.38% - 0s H 0 0 167.0000000 166.66667 0.20% - 0s Explored 0 nodes (95 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.670000000000e+02, best bound 1.670000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 167 Solution: 55 x [1, 5, 6, 7, 8, 9] 62 x [4, 5, 6, 7, 8, 9] 1 x [2, 6, 7, 7, 9] 8 x [2, 6, 7, 7, 7, 9] 4 x [5, 6, 6, 6, 8, 9] 1 x [2, 6, 6, 6, 6, 9] 1 x [1, 3, 4, 6, 8] 12 x [1, 3, 4, 4, 6, 8] 23 x [1, 1, 3, 4, 4, 6]