Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:31 2013 Optimize a model with 1080 rows, 4840 columns and 11220 nonzeros Presolve removed 60 rows and 40 columns Presolve time: 0.03s Presolved: 1020 rows, 4800 columns, 10360 nonzeros Variable types: 4420 continuous, 380 integer (380 binary) Root relaxation: objective 3.860476e+04, 751 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38604.7615 0 3 - 38604.7615 - - 0s 0 0 38713.2155 0 3 - 38713.2155 - - 0s 0 0 38757.7312 0 3 - 38757.7312 - - 0s 0 0 38762.0244 0 4 - 38762.0244 - - 0s 0 0 38770.9574 0 4 - 38770.9574 - - 0s 0 0 38776.5540 0 4 - 38776.5540 - - 0s 0 0 38783.9898 0 3 - 38783.9898 - - 0s 0 0 38788.4281 0 3 - 38788.4281 - - 0s 0 0 38793.0565 0 3 - 38793.0565 - - 0s 0 0 38793.9370 0 4 - 38793.9370 - - 0s 0 0 38795.4077 0 3 - 38795.4077 - - 0s 0 0 38796.3493 0 3 - 38796.3493 - - 0s 0 0 38799.1820 0 3 - 38799.1820 - - 0s 0 0 38800.0982 0 3 - 38800.0982 - - 0s 0 0 38801.5557 0 3 - 38801.5557 - - 0s 0 0 38803.8523 0 3 - 38803.8523 - - 0s 0 0 38808.2382 0 3 - 38808.2382 - - 0s 0 0 38808.6244 0 4 - 38808.6244 - - 0s 0 0 38808.8700 0 3 - 38808.8700 - - 0s 0 0 38810.4167 0 4 - 38810.4167 - - 0s 0 0 38811.9890 0 4 - 38811.9890 - - 0s 0 0 38812.0806 0 3 - 38812.0806 - - 0s H 0 0 38864.139734 38812.0806 0.13% - 0s 0 0 38812.0806 0 3 38864.1397 38812.0806 0.13% - 0s 0 0 38812.0806 0 4 38864.1397 38812.0806 0.13% - 0s 0 0 38812.0806 0 4 38864.1397 38812.0806 0.13% - 0s 0 0 38812.0806 0 4 38864.1397 38812.0806 0.13% - 0s 0 0 38812.0806 0 4 38864.1397 38812.0806 0.13% - 0s 0 0 38812.0806 0 4 38864.1397 38812.0806 0.13% - 0s 0 0 38812.0806 0 3 38864.1397 38812.0806 0.13% - 0s 0 0 38812.0806 0 3 38864.1397 38812.0806 0.13% - 0s 0 0 38812.0806 0 3 38864.1397 38812.0806 0.13% - 0s 0 2 38812.8700 0 3 38864.1397 38812.8700 0.13% - 0s * 10 2 6 38860.914280 38834.4509 0.07% 12.9 0s Cutting planes: Flow cover: 28 Explored 20 nodes (2064 simplex iterations) in 0.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.886091427998e+04, best bound 3.886091427998e+04, gap 0.0%