Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:17:49 2013

Optimize a model with 600 rows, 8220 columns and 48560 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.06s
Presolved: 580 rows, 8200 columns, 44540 nonzeros
Variable types: 8040 continuous, 160 integer (160 binary)

Root relaxation: objective 4.636776e+04, 575 iterations, 0.01 seconds

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

     0     0 46367.7551    0    6          - 46367.7551     -      -    0s
     0     0 46369.1100    0    6          - 46369.1100     -      -    0s
     0     0 46369.1100    0    6          - 46369.1100     -      -    0s
H    0     0                    51710.481183 46369.1100  10.3%     -    0s
     0     2 46369.1100    0    6 51710.4812 46369.1100  10.3%     -    0s
*   19    11              18    47095.300054 46640.8004  0.97%  15.3    0s
H   27     7                    46727.271009 46652.4128  0.16%  11.6    0s
*   39     9              20    46675.479556 46652.4128  0.05%   9.2    0s
*   47     2              10    46653.827692 46653.6763  0.00%   8.2    0s

Cutting planes:
  Flow cover: 2

Explored 48 nodes (1162 simplex iterations) in 0.86 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.665382769172e+04, best bound 4.665367629932e+04, gap 0.0003%