Build (method = -2) #dp: 134 Step-3' Graph: 24 vertices and 65 arcs (0.00s) Step-4' Graph: 22 vertices and 61 arcs (0.00s) #V4/#V3 = 0.92 #A4/#A3 = 0.94 Ready! (0.00s) Optimize a model with 32 rows, 62 columns and 146 nonzeros Presolve removed 12 rows and 19 columns Presolve time: 0.00s Presolved: 20 rows, 43 columns, 106 nonzeros Variable types: 0 continuous, 43 integer (0 binary) Found heuristic solution: objective 28.0000000 Optimize a model with 20 rows, 43 columns and 106 nonzeros Presolve removed 1 rows and 2 columns Presolved: 19 rows, 41 columns, 102 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.000e+01 Factor NZ : 1.900e+02 Factor Ops : 2.470e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 8.44293244e+01 -2.84289278e+02 1.33e+02 2.22e-16 1.21e+01 0s 1 4.15879515e+01 -7.25145819e+01 1.65e+01 2.22e-16 1.90e+00 0s 2 2.96686553e+01 -8.98426558e+00 6.42e-02 1.83e-14 4.40e-01 0s 3 2.81842455e+01 2.71659065e+01 7.55e-15 2.08e-16 1.16e-02 0s Barrier performed 3 iterations in 0.00 seconds Objective cutoff exceeded Root relaxation: cutoff, 0 iterations, 0.00 seconds Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 28 Solution: 2 x [1, 2, 5] 1 x [1, 2, 5, 7, 9] 5 x [1, 3, 4, 5, 7, 8] 8 x [1, 5] 6 x [1, 5, 6, 9] 1 x [1, 5, 7, 9] 1 x [5, 7, 9] 4 x [5, 9, 10]