Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:51 2013

Optimize a model with 480 rows, 4560 columns and 11180 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 460 rows, 4540 columns, 10760 nonzeros
Variable types: 4440 continuous, 100 integer (100 binary)

Root relaxation: objective 3.839329e+04, 498 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    6          - 38393.2919     -      -    0s
     0     0 38424.7064    0   11          - 38424.7064     -      -    0s
     0     0 38426.9138    0   11          - 38426.9138     -      -    0s
     0     0 38429.3134    0   11          - 38429.3134     -      -    0s
     0     0 38429.3825    0   11          - 38429.3825     -      -    0s
     0     0 38429.3825    0   11          - 38429.3825     -      -    0s
     0     0 38429.3825    0   11          - 38429.3825     -      -    0s
     0     0 38429.3825    0   11          - 38429.3825     -      -    0s
     0     2 38430.3416    0   11          - 38430.3416     -      -    0s
*   14     9              13    38634.658974 38561.6658  0.19%  19.6    0s

Cutting planes:
  Gomory: 1
  Flow cover: 8

Explored 22 nodes (1231 simplex iterations) in 0.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863465897436e+04, best bound 3.863166185557e+04, gap 0.0078%