Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:50:59 2013

Optimize a model with 640 rows, 24700 columns and 248380 nonzeros
Presolve removed 20 rows and 500 columns
Presolve time: 0.45s
Presolved: 620 rows, 24200 columns, 228380 nonzeros
Variable types: 24020 continuous, 180 integer (180 binary)

Root relaxation: objective 4.636776e+04, 609 iterations, 0.03 seconds

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

     0     0 46367.7551    0   14          - 46367.7551     -      -    0s
     0     0 46368.2972    0   14          - 46368.2972     -      -    0s
     0     0 46368.2972    0   14          - 46368.2972     -      -    0s
     0     2 46370.7427    0   14          - 46370.7427     -      -    2s
*  121    80             105    46808.338985 46380.7649  0.91%   4.4    3s
*  142    25              19    46701.880387 46382.1549  0.68%   4.8    3s
*  184    51              20    46700.264336 46388.3318  0.67%   5.1    4s
*  236    54              14    46673.887290 46402.5280  0.58%   5.3    4s
*  261    57              27    46663.964616 46431.1667  0.50%   5.3    4s
*  280    25              16    46658.625165 46464.0095  0.42%   5.6    4s
*  315     6              11    46653.828005 46651.4794  0.01%   5.8    4s

Cutting planes:
  Flow cover: 2

Explored 316 nodes (2913 simplex iterations) in 4.71 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.665382800523e+04, best bound 4.665147941909e+04, gap 0.0050%