Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:02 2013

Optimize a model with 440 rows, 4760 columns and 10980 nonzeros
Presolve removed 20 rows and 260 columns
Presolve time: 0.01s
Presolved: 420 rows, 4500 columns, 10580 nonzeros
Variable types: 4420 continuous, 80 integer (80 binary)

Root relaxation: objective 3.839329e+04, 531 iterations, 0.01 seconds

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

     0     0 38393.2919    0    4          - 38393.2919     -      -    0s
     0     0 38420.7397    0    4          - 38420.7397     -      -    0s
     0     0 38425.7137    0    6          - 38425.7137     -      -    0s
     0     0 38437.5032    0    6          - 38437.5032     -      -    0s
     0     0 38446.9304    0    4          - 38446.9304     -      -    0s
     0     0 38448.6713    0    4          - 38448.6713     -      -    0s
     0     0 38449.1320    0    6          - 38449.1320     -      -    0s
     0     0 38449.1320    0    6          - 38449.1320     -      -    0s
     0     0 38449.1320    0    6          - 38449.1320     -      -    0s
     0     0 38449.6749    0    6          - 38449.6749     -      -    0s
     0     0 38449.6749    0    6          - 38449.6749     -      -    0s
H    0     0                    41274.449015 38449.6749  6.84%     -    0s
     0     2 38455.6585    0    6 41274.4490 38455.6585  6.83%     -    0s
*   18     8              18    38645.657009 38525.1311  0.31%  11.6    0s
*   24     3               6    38634.233867 38592.9133  0.11%  11.1    0s

Cutting planes:
  Flow cover: 10

Explored 28 nodes (1114 simplex iterations) in 0.39 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863423386685e+04, best bound 3.863423386685e+04, gap 0.0%