Build (method = -2) #dp: 58 Step-3' Graph: 16 vertices and 41 arcs (0.00s) Step-4' Graph: 8 vertices and 25 arcs (0.00s) #V4/#V3 = 0.50 #A4/#A3 = 0.61 Ready! (0.00s) Optimize a model with 18 rows, 26 columns and 66 nonzeros Presolve removed 18 rows and 26 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 7.300000000000e+01, best bound 7.300000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 73 Solution: 11 x [1] 3 x [2] 15 x [2, 10] 18 x [3] 2 x [3, 9] 4 x [4] 10 x [5] 4 x [6, 7] 6 x [6, 8]