Build (method = -2) #dp: 661 Step-3' Graph: 56 vertices and 178 arcs (0.00s) Step-4' Graph: 18 vertices and 102 arcs (0.00s) #V4/#V3 = 0.32 #A4/#A3 = 0.57 Ready! (0.00s) Optimize a model with 68 rows, 103 columns and 277 nonzeros Presolve removed 68 rows and 103 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 3.700000000000e+01, best bound 3.700000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 37 Solution: 1 x [2, 46] 1 x [9, 44] 1 x [8, 16] 1 x [15, 39] 1 x [48] 1 x [10, 28] 1 x [7] 1 x [29, 38] 1 x [47] 1 x [49] 1 x [6] 1 x [32, 37] 1 x [31, 36] 1 x [22, 40] 1 x [45] 1 x [11, 13] 1 x [30, 50] 1 x [33] 1 x [12, 14] 1 x [5] 1 x [35] 1 x [41] 1 x [1, 34] 1 x [42] 1 x [25] 1 x [43] 1 x [24] 1 x [3] 1 x [4] 1 x [26] 1 x [23] 1 x [27] 1 x [18] 1 x [21] 1 x [19] 1 x [17] 1 x [20]