Build (method = -2) #dp: 320 Step-3' Graph: 64 vertices and 185 arcs (0.00s) Step-4' Graph: 20 vertices and 97 arcs (0.00s) #V4/#V3 = 0.31 #A4/#A3 = 0.52 Ready! (0.00s) Optimize a model with 60 rows, 98 columns and 258 nonzeros Presolve removed 60 rows and 98 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 2.257000000000e+03, best bound 2.257000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 2257 Solution: 69 x [25] 48 x [35] 95 x [20] 63 x [15] 98 x [26] 55 x [30] 80 x [5] 20 x [39] 81 x [6] 65 x [18] 42 x [8, 21] 92 x [3] 77 x [36] 65 x [16] 68 x [7] 2 x [7, 17] 81 x [10] 88 x [31] 98 x [12] 76 x [17, 19] 23 x [33] 43 x [14, 33] 15 x [40] 57 x [24, 38] 18 x [32] 33 x [24, 32] 77 x [28] 11 x [11, 28] 51 x [23] 89 x [27] 93 x [2] 50 x [22] 36 x [1] 15 x [1, 9] 5 x [1, 21] 61 x [29] 67 x [37] 15 x [21, 37] 60 x [4, 34] 15 x [21, 34] 6 x [13] 39 x [4, 13] 15 x [13, 21]