Build (method = -2) #dp: 601 Step-3' Graph: 69 vertices and 200 arcs (0.00s) Step-4' Graph: 4 vertices and 70 arcs (0.00s) #V4/#V3 = 0.06 #A4/#A3 = 0.35 Ready! (0.00s) Optimize a model with 38 rows, 71 columns and 209 nonzeros Presolve removed 38 rows and 71 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 [3, 19] 2 x [3, 6] 1 x [2, 26] 1 x [1, 18] 1 x [30, 34] 1 x [17, 34] 1 x [29, 33] 1 x [16, 33] 1 x [13, 32] 1 x [7, 31] 1 x [27, 28] 1 x [14, 27] 1 x [25, 26] 1 x [12, 26] 1 x [18, 24] 1 x [15, 23] 1 x [13, 22] 1 x [10, 21] 1 x [7, 20] 1 x [11, 18] 1 x [9, 15] 1 x [8, 13] 1 x [5, 10] 1 x [4, 7]