Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:52:51 2013 Optimize a model with 10320 rows, 24060 columns and 78100 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.42s Presolved: 10300 rows, 24040 columns, 68080 nonzeros Variable types: 14040 continuous, 10000 integer (10000 binary) Root relaxation: objective 3.860476e+04, 512 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38604.7615 0 6 - 38604.7615 - - 1s 0 0 38700.7241 0 6 - 38700.7241 - - 1s 0 0 38716.1810 0 7 - 38716.1810 - - 1s 0 0 38717.9658 0 7 - 38717.9658 - - 1s 0 0 38719.1054 0 7 - 38719.1054 - - 1s 0 0 38720.6549 0 11 - 38720.6549 - - 1s 0 0 38728.3574 0 8 - 38728.3574 - - 1s 0 0 38728.5535 0 8 - 38728.5535 - - 1s 0 0 38728.9776 0 11 - 38728.9776 - - 2s 0 0 38732.1906 0 11 - 38732.1906 - - 2s 0 0 38732.3365 0 11 - 38732.3365 - - 2s 0 0 38732.3365 0 11 - 38732.3365 - - 2s 0 2 38732.3365 0 11 - 38732.3365 - - 4s 10 12 38859.5846 5 2 - 38814.3347 - 55.1 5s * 28 8 14 38861.069221 38814.3347 0.12% 34.8 5s Cutting planes: Gomory: 1 Implied bound: 45 Flow cover: 4 Explored 55 nodes (1958 simplex iterations) in 5.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.886106922148e+04, best bound 3.885748025805e+04, gap 0.0092%