Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:45 2013

Optimize a model with 280 rows, 6060 columns and 14080 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 260 rows, 6040 columns, 12060 nonzeros
Variable types: 6040 continuous, 0 integer (0 binary)

Root relaxation: objective 3.860476e+04, 351 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
H    0     0                    38893.436337 38604.7615  0.74%     -    0s
     0     2 38604.7615    0    3 38893.4363 38604.7615  0.74%     -    0s
*   24     8              12    38861.053354 38851.1992  0.03%   4.5    0s

Explored 30 nodes (462 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886105335407e+04, best bound 3.885729417576e+04, gap 0.0097%