Build (method = -2) #dp: 546 Step-3' Graph: 42 vertices and 135 arcs (0.00s) Step-4' Graph: 15 vertices and 81 arcs (0.00s) #V4/#V3 = 0.36 #A4/#A3 = 0.60 Ready! (0.00s) Optimize a model with 52 rows, 82 columns and 220 nonzeros Presolve removed 32 rows and 36 columns Presolve time: 0.00s Presolved: 20 rows, 46 columns, 112 nonzeros Variable types: 0 continuous, 46 integer (9 binary) Found heuristic solution: objective 38.0000000 Found heuristic solution: objective 33.0000000 Optimize a model with 20 rows, 46 columns and 112 nonzeros Presolved: 20 rows, 46 columns, 112 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.700e+01 Factor NZ : 2.100e+02 Factor Ops : 2.870e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.17469708e+02 -2.72798176e+02 2.00e+01 1.11e-16 1.53e+01 0s 1 7.43101862e+01 -5.99384833e+01 2.25e+00 9.99e-16 1.83e+00 0s 2 4.10585653e+01 3.28307448e+00 1.18e-02 2.33e-15 3.79e-01 0s 3 3.22266785e+01 2.26581394e+01 2.44e-05 6.66e-16 9.57e-02 0s 4 2.92308116e+01 2.81858757e+01 3.39e-06 1.11e-15 1.04e-02 0s 5 2.90082646e+01 2.89799216e+01 5.72e-08 4.44e-16 2.83e-04 0s 6 2.90000001e+01 2.89999997e+01 1.51e-13 5.95e-16 3.33e-09 0s 7 2.90000000e+01 2.90000000e+01 4.22e-15 5.55e-16 3.38e-15 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 2.90000000e+01 Root relaxation: objective 2.900000e+01, 22 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 29.0000000 29.00000 0.0% - 0s Explored 0 nodes (22 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 29 Solution: 2 x [37] 2 x [36] 1 x [35] 2 x [34] 1 x [33] 1 x [1, 33] 1 x [2, 32] 1 x [4, 31] 1 x [3, 31] 1 x [5, 30] 1 x [8, 29] 1 x [7, 28] 1 x [6, 27] 1 x [11, 26] 1 x [11, 25] 1 x [12, 24] 1 x [14, 23] 1 x [18, 22] 1 x [20, 21] 1 x [18, 19] 1 x [14, 17] 1 x [6, 16] 1 x [2, 15] 1 x [12, 13] 2 x [9, 10]