Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:36 2013

Optimize a model with 560 rows, 6200 columns and 26500 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.04s
Presolved: 540 rows, 6180 columns, 24480 nonzeros
Variable types: 6040 continuous, 140 integer (140 binary)

Root relaxation: objective 4.370285e+04, 649 iterations, 0.02 seconds

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

     0     0 43702.8549    0    6          - 43702.8549     -      -    0s
     0     0 43705.8741    0    6          - 43705.8741     -      -    0s
     0     0 43705.9803    0    7          - 43705.9803     -      -    0s
     0     0 43705.9803    0    7          - 43705.9803     -      -    0s
     0     0 43706.0265    0    7          - 43706.0265     -      -    0s
     0     0 43706.0265    0    7          - 43706.0265     -      -    0s
     0     0 43706.0265    0    7          - 43706.0265     -      -    0s
H    0     0                    46453.012763 43706.0265  5.91%     -    0s
     0     2 43708.3082    0    7 46453.0128 43708.3082  5.91%     -    0s
*   18     9              16    44047.124165 43848.5475  0.45%  14.1    0s
*   34    13              12    44040.345983 43878.1718  0.37%  11.3    0s
*   83    25              27    43964.086876 43900.7573  0.14%   7.7    0s
*   86    23              29    43940.005517 43900.7573  0.09%   7.4    0s
H   89    11                    43909.992758 43900.7573  0.02%   7.2    0s
*   91     7              11    43903.217086 43900.8161  0.01%   7.1    0s

Cutting planes:
  Flow cover: 8

Explored 92 nodes (1676 simplex iterations) in 0.70 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390321708586e+04, best bound 4.390081613063e+04, gap 0.0055%