Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:32 2013

Optimize a model with 19006 rows, 18576 columns and 74046 nonzeros
Presolve removed 43 rows and 0 columns
Presolve time: 0.08s
Presolved: 18963 rows, 18576 columns, 74003 nonzeros
Variable types: 18533 continuous, 43 integer (43 binary)

Root relaxation: objective 3.750156e+04, 2515 iterations, 0.72 seconds

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

     0     0 37501.5580    0   41          - 37501.5580     -      -    0s
H    0     0                    46711.000000 37501.5580  19.7%     -    1s
     0     0 43711.3996    0    5 46711.0000 43711.3996  6.42%     -    2s
H    0     0                    45595.094328 43711.3996  4.13%     -    2s
H    0     0                    44584.000000 43711.3996  1.96%     -    2s
     0     0 43711.3996    0    5 44584.0000 43711.3996  1.96%     -    2s
H    0     0                    43919.000000 43711.3996  0.47%     -    2s
     0     2 43740.9438    0    5 43919.0000 43740.9438  0.41%     -    2s
*    8     2               6    43900.000000 43884.0000  0.04%  50.0    2s

Cutting planes:
  Gomory: 1
  Implied bound: 36

Explored 12 nodes (4025 simplex iterations) in 2.70 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390000000000e+04, best bound 4.390000000000e+04, gap 0.0%