Build (method = -2) #dp: 44 Step-3' Graph: 14 vertices and 35 arcs (0.00s) Step-4' Graph: 6 vertices and 19 arcs (0.00s) #V4/#V3 = 0.43 #A4/#A3 = 0.54 Ready! (0.00s) Optimize a model with 16 rows, 20 columns and 52 nonzeros Presolve removed 16 rows and 20 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 9.100000000000e+01, best bound 9.100000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 91 Solution: 4 x [1] 22 x [2] 4 x [3] 12 x [4] 3 x [4, 10] 20 x [5] 5 x [6, 9] 1 x [7, 8] 20 x [8]