Build (method = -2) #dp: 1776 Step-3' Graph: 116 vertices and 340 arcs (0.01s) Step-4' Graph: 4 vertices and 116 arcs (0.01s) #V4/#V3 = 0.03 #A4/#A3 = 0.34 Ready! (0.01s) Optimize a model with 61 rows, 117 columns and 348 nonzeros Presolve removed 61 rows and 117 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 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 57 Solution: 3 x [46, 49] 1 x [16, 42] 1 x [14, 44] 1 x [55, 57] 1 x [36, 39] 1 x [4, 33] 4 x [28, 29] 1 x [12, 37] 1 x [25, 48] 2 x [9, 18] 1 x [5, 40] 1 x [2, 38] 2 x [13, 32] 1 x [1, 20] 1 x [8, 16] 2 x [11, 53] 4 x [7, 15] 1 x [6, 14] 3 x [17, 31] 3 x [22, 26] 1 x [51, 55] 3 x [10, 34] 4 x [3, 19] 1 x [23, 39] 1 x [9, 27] 2 x [24, 41] 1 x [4, 21] 1 x [37, 50] 1 x [32, 47] 1 x [25, 52] 1 x [43, 46] 1 x [30, 40] 1 x [11, 56] 1 x [35, 41] 1 x [38, 45] 1 x [20, 54]