Build (method = -2) #dp: 1462 Step-3' Graph: 71 vertices and 205 arcs (0.01s) Step-4' Graph: 29 vertices and 121 arcs (0.01s) #V4/#V3 = 0.41 #A4/#A3 = 0.59 Ready! (0.01s) Optimize a model with 39 rows, 122 columns and 317 nonzeros Presolve removed 8 rows and 12 columns Presolve time: 0.00s Presolved: 31 rows, 110 columns, 295 nonzeros Variable types: 0 continuous, 110 integer (0 binary) Found heuristic solution: objective 99.0000000 Found heuristic solution: objective 90.0000000 Found heuristic solution: objective 89.0000000 Optimize a model with 31 rows, 110 columns and 295 nonzeros Presolved: 31 rows, 110 columns, 295 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.440e+02 Factor NZ : 3.840e+02 Factor Ops : 5.936e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.99919955e+02 -1.03505498e+03 6.78e+02 1.11e-16 2.71e+01 0s 1 1.02418281e+02 -4.87885841e+02 6.19e+01 4.44e-16 4.07e+00 0s 2 4.73435731e+01 -6.96010080e+01 8.07e-01 3.89e-16 5.20e-01 0s 3 2.06659254e+01 -5.61902758e-01 1.00e-01 7.22e-16 9.31e-02 0s 4 1.76518847e+01 1.23993779e+01 1.92e-02 2.22e-16 2.30e-02 0s 5 1.67668424e+01 1.63401293e+01 6.12e-04 3.24e-16 1.86e-03 0s 6 1.66677789e+01 1.66570053e+01 7.09e-06 3.28e-16 4.70e-05 0s 7 1.66666667e+01 1.66666667e+01 7.31e-12 4.44e-16 5.70e-11 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 1.66666667e+01 Root relaxation: objective 1.666667e+01, 74 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.66667 0 8 89.00000 16.66667 81.3% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (89 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 17 Solution: 1 x [2, 4, 5, 8, 9, 10] 5 x [3, 3, 4, 6, 7, 9] 2 x [1, 4, 7, 8, 9, 10] 7 x [4, 4, 5, 7, 8, 10] 1 x [4, 7, 7, 9, 9, 9] 1 x [4, 7, 7, 10]