Build (method = -2) #dp: 1007 Step-3' Graph: 87 vertices and 253 arcs (0.00s) Step-4' Graph: 4 vertices and 87 arcs (0.01s) #V4/#V3 = 0.05 #A4/#A3 = 0.34 Ready! (0.01s) Optimize a model with 47 rows, 88 columns and 261 nonzeros Presolve removed 47 rows and 88 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 [39, 43] 3 x [41, 42] 1 x [39, 41] 2 x [13, 41] 2 x [2, 40] 1 x [36, 38] 1 x [33, 38] 3 x [9, 37] 3 x [4, 35] 3 x [1, 34] 1 x [31, 32] 1 x [27, 32] 1 x [23, 30] 1 x [16, 30] 1 x [12, 29] 1 x [11, 29] 3 x [15, 28] 1 x [10, 26] 1 x [9, 26] 4 x [12, 25] 3 x [14, 24] 3 x [6, 22] 1 x [8, 21] 1 x [4, 21] 3 x [5, 20] 1 x [3, 19] 1 x [1, 19] 6 x [6, 18] 6 x [7, 17]