Build (method = -2) #dp: 193 Step-3' Graph: 16 vertices and 73 arcs (0.00s) Step-4' Graph: 12 vertices and 65 arcs (0.00s) #V4/#V3 = 0.75 #A4/#A3 = 0.89 Ready! (0.00s) Optimize a model with 48 rows, 66 columns and 178 nonzeros Presolve removed 34 rows and 36 columns Presolve time: 0.00s Presolved: 14 rows, 30 columns, 74 nonzeros Variable types: 0 continuous, 30 integer (8 binary) Found heuristic solution: objective 43.0000000 Found heuristic solution: objective 37.0000000 Optimize a model with 14 rows, 30 columns and 74 nonzeros Presolve removed 7 rows and 19 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 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 [36] 1 x [35] 2 x [34] 1 x [33] 1 x [32] 1 x [31] 2 x [30] 2 x [29] 1 x [28] 1 x [27] 3 x [26] 1 x [25] 1 x [24] 2 x [23] 1 x [22] 1 x [2, 21] 1 x [2, 20] 1 x [3, 19] 3 x [18] 1 x [1, 17] 1 x [5, 16] 1 x [6, 15] 1 x [7, 14] 1 x [7, 13] 1 x [4, 12] 2 x [8, 11] 1 x [9, 10] 1 x [5, 5]