Build (method = -2) #dp: 76 Step-3' Graph: 21 vertices and 56 arcs (0.00s) Step-4' Graph: 12 vertices and 38 arcs (0.00s) #V4/#V3 = 0.57 #A4/#A3 = 0.68 Ready! (0.00s) Optimize a model with 22 rows, 39 columns and 97 nonzeros Presolve removed 10 rows and 12 columns Presolve time: 0.00s Presolved: 12 rows, 27 columns, 67 nonzeros Variable types: 0 continuous, 27 integer (5 binary) Found heuristic solution: objective 62.0000000 Found heuristic solution: objective 61.0000000 Optimize a model with 12 rows, 27 columns and 67 nonzeros Presolve removed 3 rows and 10 columns Presolved: 9 rows, 17 columns, 40 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.400e+01 Factor NZ : 4.500e+01 Factor Ops : 2.850e+02 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.10000000e+01 4.23000000e+01 7.70e+01 0.00e+00 1.38e+00 0s 1 6.10000000e+01 5.54578885e+01 4.06e-01 1.39e-17 1.60e-01 0s 2 6.10000000e+01 6.09930447e+01 8.88e-15 6.94e-18 1.99e-04 0s Barrier performed 2 iterations in 0.00 seconds Objective cutoff exceeded Root relaxation: cutoff, 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 6.100000000000e+01, best bound 6.100000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 61 Solution: 13 x [1] 14 x [2] 1 x [3, 7] 6 x [3, 9] 3 x [3, 9, 10] 11 x [4, 8, 10] 4 x [5, 6] 9 x [6]