Build (method = -2) #dp: 88 Step-3' Graph: 18 vertices and 47 arcs (0.00s) Step-4' Graph: 17 vertices and 45 arcs (0.00s) #V4/#V3 = 0.94 #A4/#A3 = 0.96 Ready! (0.00s) Optimize a model with 26 rows, 46 columns and 108 nonzeros Presolve removed 26 rows and 46 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 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 22 Solution: 1 x [1, 5, 7, 8] 9 x [2, 3, 5, 7] 6 x [2, 4, 5, 6, 7, 8, 9] 4 x [3, 5, 8] 2 x [5, 8, 9]