Gurobi 5.0.1 (linux64) logging started Sun Dec  9 06:11:51 2012

Optimize a model with 3000 rows, 2970 columns and 11303 nonzeros
Presolve removed 142 rows and 47 columns
Presolve time: 0.02s
Presolved: 2858 rows, 2923 columns, 10995 nonzeros
Variable types: 2746 continuous, 177 integer (177 binary)

Root relaxation: objective 5.304674e+04, 257 iterations, 0.00 seconds

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

     0     0 53046.7373    0    8          - 53046.7373     -      -    0s
H    0     0                    53870.000000 53046.7373  1.53%     -    0s
     0     0 53083.6514    0   17 53870.0000 53083.6514  1.46%     -    0s
     0     0 53105.1906    0   19 53870.0000 53105.1906  1.42%     -    0s
     0     0 53117.5135    0   19 53870.0000 53117.5135  1.40%     -    0s
     0     0 53122.2050    0   16 53870.0000 53122.2050  1.39%     -    0s
     0     0 53122.5217    0   16 53870.0000 53122.5217  1.39%     -    0s
     0     2 53128.5578    0   16 53870.0000 53128.5578  1.38%     -    0s
H   15    13                    53379.000000 53180.0546  0.37%   4.1    0s
*   16    10              15    53281.000000 53180.0546  0.19%   4.2    0s
*   38    14              13    53274.000000 53182.3852  0.17%   4.1    0s
*   50    11              12    53273.000000 53207.0518  0.12%   4.4    0s

Cutting planes:
  Gomory: 3
  Flow cover: 15

Explored 77 nodes (633 simplex iterations) in 0.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.327300000000e+04, best bound 5.327300000000e+04, gap 0.0%