Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:24 2013

Optimize a model with 21666 rows, 21206 columns and 84686 nonzeros
Presolve removed 2854 rows and 0 columns
Presolve time: 0.12s
Presolved: 18812 rows, 21206 columns, 78978 nonzeros
Variable types: 21160 continuous, 46 integer (46 binary)

Root relaxation: objective 4.776760e+04, 3725 iterations, 0.26 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 47767.6000    0    1          - 47767.6000     -      -    0s
H    0     0                    47780.000000 47767.6000  0.03%     -    0s
     0     0     cutoff    0      47780.0000 47780.0000   0.0%     -    0s

Explored 0 nodes (3731 simplex iterations) in 0.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.778000000000e+04, best bound 4.778000000000e+04, gap 0.0%