Build (method = -2) #dp: 52 Step-3' Graph: 11 vertices and 26 arcs (0.00s) Step-4' Graph: 11 vertices and 26 arcs (0.00s) #V4/#V3 = 1.00 #A4/#A3 = 1.00 Ready! (0.00s) Optimize a model with 20 rows, 27 columns and 63 nonzeros Presolve removed 20 rows and 27 columns Presolve time: 0.00s 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 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 24 Solution: 1 x [1, 2, 3, 5, 7, 8] 4 x [1, 2, 6, 8] 7 x [2, 3, 4, 6, 8, 9] 12 x [2, 3, 6]