Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:19 2013

Optimize a model with 280 rows, 4260 columns and 8680 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 260 rows, 4240 columns, 8460 nonzeros
Variable types: 4240 continuous, 0 integer (0 binary)

Root relaxation: objective 3.860476e+04, 375 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                    40379.287226 38604.7615  4.39%     -    0s
     0     2 38604.7615    0    3 40379.2872 38604.7615  4.39%     -    0s
*   15     5               8    38860.427834 38851.1992  0.02%  22.3    0s

Explored 21 nodes (712 simplex iterations) in 0.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886042783404e+04, best bound 3.885729417576e+04, gap 0.0081%