Build (method = -2) #dp: 493 Step-3' Graph: 101 vertices and 296 arcs (0.00s) Step-4' Graph: 30 vertices and 154 arcs (0.00s) #V4/#V3 = 0.30 #A4/#A3 = 0.52 Ready! (0.00s) Optimize a model with 68 rows, 155 columns and 409 nonzeros Presolve removed 24 rows and 29 columns Presolve time: 0.00s Presolved: 44 rows, 126 columns, 330 nonzeros Variable types: 0 continuous, 126 integer (0 binary) Found heuristic solution: objective 382.0000000 Found heuristic solution: objective 216.0000000 Optimize a model with 44 rows, 126 columns and 330 nonzeros Presolve removed 0 rows and 89 columns Root relaxation: infeasible, 0 iterations, 0.00 seconds 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 2.160000000000e+02, best bound 2.160000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 216 Solution: 13 x [1] 2 x [2] 10 x [3, 36] 12 x [4, 37] 2 x [4, 38] 14 x [5] 1 x [5, 36] 2 x [6] 1 x [7, 35] 4 x [8, 33] 16 x [9, 35] 2 x [10, 33] 8 x [10, 34] 8 x [11, 31] 16 x [12, 25] 12 x [13, 27] 2 x [14, 26] 16 x [15, 23] 16 x [15, 24] 1 x [15, 29] 3 x [15, 32] 1 x [16, 27] 1 x [16, 30] 4 x [16, 31] 10 x [17, 22] 11 x [18, 29] 10 x [19, 30] 1 x [20] 3 x [20, 21] 14 x [21, 28]