Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:05:01 2013

Optimize a model with 21712 rows, 21252 columns and 84732 nonzeros
Presolve removed 46 rows and 0 columns
Presolve time: 0.09s
Presolved: 21666 rows, 21252 columns, 84686 nonzeros
Variable types: 21206 continuous, 46 integer (46 binary)

Root relaxation: objective 4.089856e+04, 3244 iterations, 1.07 seconds

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

     0     0 40898.5586    0   40          - 40898.5586     -      -    1s
H    0     0                    51715.000000 40898.5586  20.9%     -    1s
     0     0 47753.4358    0    2 51715.0000 47753.4358  7.66%     -    2s
H    0     0                    48855.190049 47753.4358  2.26%     -    2s
H    0     0                    48718.000000 47753.4358  1.98%     -    2s
H    0     0                    47780.000000 47753.4358  0.06%     -    2s
     0     0 47767.6000    0    1 47780.0000 47767.6000  0.03%     -    2s
     0     0 47773.9333    0    1 47780.0000 47773.9333  0.01%     -    2s
     0     0 47777.7778    0    1 47780.0000 47777.7778  0.00%     -    2s

Cutting planes:
  Implied bound: 40

Explored 0 nodes (4764 simplex iterations) in 2.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.778000000000e+04, best bound 4.777777777778e+04, gap 0.0047%