Build (method = -2) #dp: 55 Step-3' Graph: 15 vertices and 38 arcs (0.00s) Step-4' Graph: 7 vertices and 22 arcs (0.00s) #V4/#V3 = 0.47 #A4/#A3 = 0.58 Ready! (0.00s) Optimize a model with 17 rows, 23 columns and 59 nonzeros Presolve removed 13 rows and 17 columns Presolve time: 0.00s Presolved: 4 rows, 6 columns, 14 nonzeros Variable types: 0 continuous, 6 integer (0 binary) Found heuristic solution: objective 77.0000000 Found heuristic solution: objective 76.0000000 Found heuristic solution: objective 75.0000000 Found heuristic solution: objective 68.0000000 Optimize a model with 4 rows, 6 columns and 14 nonzeros Presolved: 4 rows, 6 columns, 14 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.000e+00 Factor NZ : 1.000e+01 Factor Ops : 3.000e+01 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.32051282e+01 2.52757694e+01 1.16e+01 0.00e+00 5.96e+00 0s 1 6.99005756e+01 6.28595452e+01 4.65e-01 2.22e-16 5.77e-01 0s 2 6.80508937e+01 6.77873392e+01 3.55e-15 1.11e-16 2.03e-02 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 6.800000000000e+01, best bound 6.800000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 68 Solution: 13 x [1] 7 x [2] 7 x [2, 10] 9 x [3, 9] 3 x [4] 5 x [4, 9] 13 x [5] 9 x [6, 7] 2 x [6, 8]