Build (method = -2) #dp: 127 Step-3' Graph: 32 vertices and 89 arcs (0.00s) Step-4' Graph: 11 vertices and 47 arcs (0.00s) #V4/#V3 = 0.34 #A4/#A3 = 0.53 Ready! (0.00s) Optimize a model with 31 rows, 48 columns and 126 nonzeros Presolve removed 31 rows and 48 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 1.790000000000e+02, best bound 1.790000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 179 Solution: 7 x [1] 1 x [2, 20] 13 x [3] 11 x [4] 8 x [5] 2 x [5, 19] 16 x [6] 19 x [7] 17 x [8] 13 x [9] 18 x [10] 18 x [11] 2 x [12] 1 x [13] 11 x [13, 17] 4 x [13, 18] 2 x [14, 15] 15 x [15] 1 x [15, 16]