Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:03:48 2012

Optimize a model with 3402 rows, 3280 columns and 14560 nonzeros
Presolve removed 201 rows and 82 columns
Presolve time: 0.11s
Presolved: 3201 rows, 3198 columns, 14142 nonzeros
Variable types: 1559 continuous, 1639 integer (1639 binary)

Root relaxation: objective 3.289028e+02, 3634 iterations, 0.22 seconds

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

     0     0  328.90281    0   91          -  328.90281     -      -    0s
     0     0  382.14238    0   88          -  382.14238     -      -    0s
     0     0  389.96109    0   85          -  389.96109     -      -    0s
     0     0  395.19192    0   80          -  395.19192     -      -    0s
     0     0  402.03476    0   72          -  402.03476     -      -    0s
     0     0  418.11749    0   76          -  418.11749     -      -    0s
     0     0  419.19905    0   88          -  419.19905     -      -    0s
     0     0  420.41923    0   88          -  420.41923     -      -    0s
     0     0  423.30065    0   94          -  423.30065     -      -    1s
     0     0  427.21929    0   92          -  427.21929     -      -    1s
     0     0  433.50474    0   55          -  433.50474     -      -    1s
     0     0  433.79693    0   62          -  433.79693     -      -    1s
     0     0  433.79693    0   62          -  433.79693     -      -    1s
     0     2  434.13605    0   62          -  434.13605     -      -    2s
*   55    32              19     488.0000000  442.11200  9.40%   151    3s
H   87    24                     478.0000000  461.53920  3.44%   117    3s

Cutting planes:
  Cover: 33
  Implied bound: 5
  Flow cover: 36
  GUB cover: 12

Explored 142 nodes (21252 simplex iterations) in 3.80 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.780000000000e+02, best bound 4.780000000000e+02, gap 0.0%