Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:48 2013

Optimize a model with 720 rows, 4860 columns and 10900 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.03s
Presolved: 700 rows, 4840 columns, 10480 nonzeros
Variable types: 4440 continuous, 400 integer (400 binary)

Root relaxation: objective 4.370285e+04, 647 iterations, 0.01 seconds

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

     0     0 43702.8549    0    4          - 43702.8549     -      -    0s
H    0     0                    44401.353651 43702.8549  1.57%     -    0s
     0     0 43730.5904    0    2 44401.3537 43730.5904  1.51%     -    0s
     0     0 43731.3438    0    2 44401.3537 43731.3438  1.51%     -    0s
     0     0 43731.3438    0    2 44401.3537 43731.3438  1.51%     -    0s
     0     2 43731.3438    0    2 44401.3537 43731.3438  1.51%     -    0s
*   18    15               9    44171.707932 43852.1529  0.72%  19.6    0s
*   36    15              10    44051.370957 43887.2858  0.37%  14.3    0s
*   51     7              10    43900.745969 43896.9453  0.01%  12.7    0s

Cutting planes:
  Gomory: 3
  Implied bound: 5
  Flow cover: 3

Explored 52 nodes (1533 simplex iterations) in 0.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390074596881e+04, best bound 4.389694531587e+04, gap 0.0087%