Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:04:43 2012

Optimize a model with 1682 rows, 1681 columns and 7495 nonzeros
Presolve removed 1362 rows and 990 columns
Presolve time: 0.03s
Presolved: 320 rows, 691 columns, 3231 nonzeros
Variable types: 35 continuous, 656 integer (656 binary)

Root relaxation: objective 4.225952e+02, 131 iterations, 0.00 seconds

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

     0     0  422.59518    0   39          -  422.59518     -      -    0s
     0     0  440.66327    0   31          -  440.66327     -      -    0s
     0     0  442.72700    0   29          -  442.72700     -      -    0s
     0     0  443.56360    0   36          -  443.56360     -      -    0s
     0     0  443.56360    0   36          -  443.56360     -      -    0s
     0     0  443.56360    0   30          -  443.56360     -      -    0s
     0     2  448.43860    0   30          -  448.43860     -      -    0s
*  202    67              30     470.0000000  458.24324  2.50%   7.6    0s

Cutting planes:
  Gomory: 1
  Cover: 30
  Implied bound: 16
  Clique: 6
  MIR: 24
  GUB cover: 5
  Zero half: 1

Explored 347 nodes (3154 simplex iterations) in 0.30 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.700000000000e+02, best bound 4.700000000000e+02, gap 0.0%