Build (method = -2) #dp: 46 Step-3' Graph: 15 vertices and 38 arcs (0.00s) Step-4' Graph: 8 vertices and 24 arcs (0.00s) #V4/#V3 = 0.53 #A4/#A3 = 0.63 Ready! (0.00s) Optimize a model with 18 rows, 25 columns and 63 nonzeros Presolve removed 12 rows and 14 columns Presolve time: 0.00s Presolved: 6 rows, 11 columns, 28 nonzeros Variable types: 0 continuous, 11 integer (0 binary) Found heuristic solution: objective 93.0000000 Found heuristic solution: objective 92.0000000 Optimize a model with 6 rows, 11 columns and 28 nonzeros Presolve removed 0 rows and 2 columns Presolved: 6 rows, 9 columns, 23 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.400e+01 Factor NZ : 2.100e+01 Factor Ops : 9.100e+01 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.20000000e+01 5.70000000e+01 6.51e+01 0.00e+00 3.88e+00 0s 1 9.20000000e+01 8.59642429e+01 5.41e+00 5.55e-17 3.96e-01 0s 2 9.20000000e+01 9.16551638e+01 7.11e-15 1.61e-15 1.72e-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 9.200000000000e+01, best bound 9.200000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 92 Solution: 15 x [1] 20 x [2] 20 x [3] 11 x [4] 13 x [5] 7 x [6] 4 x [6, 10] 2 x [7, 8, 9]