Build (method = -2) #dp: 141 Step-3' Graph: 34 vertices and 95 arcs (0.00s) Step-4' Graph: 14 vertices and 55 arcs (0.00s) #V4/#V3 = 0.41 #A4/#A3 = 0.58 Ready! (0.00s) Optimize a model with 33 rows, 56 columns and 144 nonzeros Presolve removed 30 rows and 52 columns Presolve time: 0.00s Presolved: 3 rows, 4 columns, 7 nonzeros Variable types: 0 continuous, 4 integer (0 binary) Found heuristic solution: objective 124.0000000 Found heuristic solution: objective 123.0000000 Optimize a model with 3 rows, 4 columns and 7 nonzeros Presolve removed 0 rows and 4 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 1.230000000000e+02, best bound 1.230000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 123 Solution: 12 x [1] 17 x [2, 19] 1 x [3, 18] 4 x [4] 10 x [5] 1 x [6] 1 x [6, 17] 3 x [7, 17] 7 x [8] 9 x [9] 5 x [10] 6 x [10, 16] 15 x [11, 16] 10 x [12, 15] 19 x [13, 14] 1 x [13, 15] 2 x [14, 15, 19]