Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:03:06 2012

Optimize a model with 1682 rows, 1681 columns and 7444 nonzeros
Presolve removed 1461 rows and 1087 columns
Presolve time: 0.02s
Presolved: 221 rows, 594 columns, 2002 nonzeros
Variable types: 35 continuous, 559 integer (559 binary)

Root relaxation: objective 4.539624e+02, 117 iterations, 0.00 seconds

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

     0     0  453.96236    0   35          -  453.96236     -      -    0s
     0     0  480.42105    0   17          -  480.42105     -      -    0s
     0     0  480.42105    0   17          -  480.42105     -      -    0s
     0     0  480.42105    0   17          -  480.42105     -      -    0s
     0     0  480.61538    0   20          -  480.61538     -      -    0s
     0     0  480.61538    0   20          -  480.61538     -      -    0s
     0     2  481.00000    0   20          -  481.00000     -      -    0s
*   41    20              13     501.0000000  482.18182  3.76%   6.4    0s
*   51    12               7     498.0000000  486.00000  2.41%   6.2    0s
*   84    14               9     497.0000000  487.61538  1.89%   6.2    0s

Cutting planes:
  Learned: 1
  Gomory: 5
  Cover: 14
  Implied bound: 7
  Clique: 3
  MIR: 6
  GUB cover: 1

Explored 115 nodes (858 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.970000000000e+02, best bound 4.970000000000e+02, gap 0.0%