Build (method = -2) #dp: 96 Step-3' Graph: 28 vertices and 77 arcs (0.00s) Step-4' Graph: 18 vertices and 57 arcs (0.00s) #V4/#V3 = 0.64 #A4/#A3 = 0.74 Ready! (0.00s) Optimize a model with 28 rows, 58 columns and 142 nonzeros Presolve removed 10 rows and 15 columns Presolve time: 0.00s Presolved: 18 rows, 43 columns, 116 nonzeros Variable types: 0 continuous, 43 integer (15 binary) Found heuristic solution: objective 45.0000000 Optimize a model with 18 rows, 43 columns and 116 nonzeros Presolved: 18 rows, 43 columns, 116 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.200e+01 Factor NZ : 1.710e+02 Factor Ops : 2.109e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.22998967e+02 -2.32005158e+02 2.28e+02 1.11e-16 1.79e+01 0s 1 5.60852115e+01 -5.82187561e+01 2.40e+01 4.44e-16 2.42e+00 0s 2 3.98934544e+01 1.07147672e+01 6.17e-01 5.55e-16 3.42e-01 0s 3 3.56090778e+01 3.09043499e+01 4.24e-02 1.11e-16 5.27e-02 0s 4 3.41319053e+01 3.36446137e+01 1.47e-03 2.57e-16 5.43e-03 0s 5 3.40040543e+01 3.39763212e+01 6.28e-05 2.61e-16 3.09e-04 0s 6 3.40000009e+01 3.39999992e+01 1.36e-09 3.64e-16 1.88e-08 0s 7 3.40000000e+01 3.40000000e+01 2.41e-12 1.18e-16 1.89e-14 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 3.40000000e+01 Root relaxation: objective 3.400000e+01, 10 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 34.0000000 34.00000 0.0% - 0s Explored 0 nodes (10 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 34 Solution: 9 x [1, 9, 10] 12 x [2, 8] 1 x [2, 9, 10] 3 x [3, 8, 9, 10] 3 x [4, 5, 9] 1 x [4, 8, 9] 1 x [5, 6, 8, 9] 3 x [5, 7, 8, 9, 10] 1 x [5, 8, 9]