Build (method = -2) #dp: 96 Step-3' Graph: 27 vertices and 74 arcs (0.00s) Step-4' Graph: 15 vertices and 50 arcs (0.00s) #V4/#V3 = 0.56 #A4/#A3 = 0.68 Ready! (0.00s) Optimize a model with 25 rows, 51 columns and 127 nonzeros Presolve removed 8 rows and 10 columns Presolve time: 0.00s Presolved: 17 rows, 41 columns, 103 nonzeros Variable types: 0 continuous, 41 integer (0 binary) Found heuristic solution: objective 46.0000000 Optimize a model with 17 rows, 41 columns and 103 nonzeros Presolved: 17 rows, 41 columns, 103 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.400e+01 Factor NZ : 1.530e+02 Factor Ops : 1.785e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.65930499e+02 -3.65516533e+02 2.24e+02 2.22e-16 2.01e+01 0s 1 7.29720915e+01 -1.03177365e+02 1.80e+01 3.33e-16 2.78e+00 0s 2 5.15634110e+01 1.49855698e+00 2.81e-02 5.11e-15 5.76e-01 0s 3 4.22334206e+01 2.95433187e+01 1.62e-04 1.33e-15 1.46e-01 0s 4 3.91510456e+01 3.60657646e+01 2.54e-05 2.22e-16 3.55e-02 0s 5 3.87102603e+01 3.85850302e+01 1.31e-06 1.60e-16 1.44e-03 0s 6 3.86666719e+01 3.86666490e+01 4.78e-11 1.56e-16 2.64e-07 0s 7 3.86666667e+01 3.86666667e+01 3.55e-14 3.46e-16 2.65e-13 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 3.86666667e+01 Root relaxation: objective 3.866667e+01, 15 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.66667 0 8 46.00000 38.66667 15.9% - 0s H 0 0 39.0000000 38.66667 0.85% - 0s Explored 0 nodes (17 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.900000000000e+01, best bound 3.900000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 39 Solution: 1 x [1, 10] 8 x [2, 7] 2 x [3, 5] 3 x [3, 8, 10] 5 x [4, 5] 14 x [4, 7, 9] 1 x [4, 7, 10] 1 x [5, 7, 8] 3 x [6, 7, 8] 1 x [7, 8]