Build (method = -2) #dp: 838 Step-3' Graph: 60 vertices and 182 arcs (0.00s) Step-4' Graph: 9 vertices and 80 arcs (0.01s) #V4/#V3 = 0.15 #A4/#A3 = 0.44 Ready! (0.01s) Optimize a model with 49 rows, 81 columns and 230 nonzeros Presolve removed 35 rows and 49 columns Presolve time: 0.00s Presolved: 14 rows, 32 columns, 83 nonzeros Variable types: 0 continuous, 32 integer (6 binary) Found heuristic solution: objective 28.0000000 Optimize a model with 14 rows, 32 columns and 83 nonzeros Presolved: 14 rows, 32 columns, 83 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.500e+01 Factor NZ : 1.050e+02 Factor Ops : 1.015e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.27606341e+02 -1.14833286e+02 1.75e+01 2.22e-16 7.81e+00 0s 1 3.66566847e+01 -2.52171760e+01 1.46e-02 6.66e-16 8.81e-01 0s 2 2.93176837e+01 5.80806934e+00 1.31e-03 8.88e-16 3.32e-01 0s 3 2.54093481e+01 2.31634415e+01 1.11e-15 2.22e-16 3.16e-02 0s 4 2.50004804e+01 2.49969084e+01 3.55e-15 2.22e-16 5.03e-05 0s 5 2.50000000e+01 2.50000000e+01 7.99e-15 3.33e-16 5.66e-11 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 2.50000000e+01 Root relaxation: objective 2.500000e+01, 17 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 25.0000000 25.00000 0.0% - 0s Explored 0 nodes (17 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 25 Solution: 1 x [20, 40] 1 x [19, 39] 1 x [14, 38] 1 x [13, 37] 1 x [12, 36] 2 x [10, 35] 1 x [8, 34] 1 x [23, 33] 1 x [7, 33] 1 x [21, 32] 1 x [5, 32] 1 x [27, 31] 1 x [3, 30] 1 x [2, 29] 1 x [27, 28] 1 x [4, 26] 1 x [11, 25] 1 x [9, 24] 1 x [18, 22] 1 x [2, 17] 2 x [6, 16] 2 x [1, 15]