Build (method = -2) #dp: 504 Step-3' Graph: 62 vertices and 178 arcs (0.00s) Step-4' Graph: 4 vertices and 62 arcs (0.00s) #V4/#V3 = 0.06 #A4/#A3 = 0.35 Ready! (0.00s) Optimize a model with 34 rows, 63 columns and 186 nonzeros Presolve removed 34 rows and 63 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 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 25 Solution: 1 x [2, 21] 1 x [2, 2] 1 x [1, 29] 1 x [26, 30] 1 x [18, 29] 1 x [15, 28] 1 x [11, 27] 1 x [17, 26] 1 x [10, 25] 1 x [6, 24] 2 x [3, 23] 2 x [13, 22] 2 x [4, 20] 2 x [3, 19] 1 x [15, 16] 1 x [13, 14] 1 x [11, 12] 1 x [9, 10] 1 x [6, 8] 1 x [4, 7] 1 x [3, 5]