Build (method = -2) #dp: 1038 Step-3' Graph: 89 vertices and 259 arcs (0.01s) Step-4' Graph: 4 vertices and 89 arcs (0.01s) #V4/#V3 = 0.04 #A4/#A3 = 0.34 Ready! (0.01s) Optimize a model with 48 rows, 90 columns and 267 nonzeros Presolve removed 48 rows and 90 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 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 60 Solution: 1 x [28, 44] 3 x [41, 43] 1 x [21, 43] 1 x [14, 42] 1 x [11, 40] 3 x [18, 39] 1 x [9, 38] 3 x [16, 37] 2 x [1, 36] 3 x [7, 35] 4 x [23, 34] 2 x [22, 33] 4 x [20, 33] 1 x [6, 32] 7 x [8, 31] 3 x [5, 30] 1 x [3, 29] 1 x [21, 27] 4 x [17, 27] 4 x [12, 26] 1 x [14, 25] 1 x [11, 24] 3 x [2, 24] 1 x [9, 19] 1 x [8, 15] 1 x [6, 13] 1 x [3, 10] 1 x [1, 4]