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

Optimize a model with 1682 rows, 1681 columns and 7430 nonzeros
Presolve removed 1506 rows and 1244 columns
Presolve time: 0.02s
Presolved: 176 rows, 437 columns, 1457 nonzeros
Variable types: 31 continuous, 406 integer (406 binary)

Root relaxation: objective 4.582154e+02, 92 iterations, 0.00 seconds

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

     0     0  458.21542    0   26          -  458.21542     -      -    0s
     0     0  475.64286    0   14          -  475.64286     -      -    0s
H    0     0                     485.0000000  475.64286  1.93%     -    0s
H    0     0                     484.0000000  475.64286  1.73%     -    0s
H    0     0                     479.0000000  475.64286  0.70%     -    0s
     0     0  476.50000    0    8  479.00000  476.50000  0.52%     -    0s
     0     0  476.50000    0   13  479.00000  476.50000  0.52%     -    0s
H    0     0                     478.0000000  476.50000  0.31%     -    0s
     0     0     cutoff    0       478.00000  477.00048  0.21%     -    0s

Cutting planes:
  Learned: 3
  Gomory: 6
  Cover: 5
  Implied bound: 1
  Clique: 5
  MIR: 3
  Zero half: 1

Explored 0 nodes (262 simplex iterations) in 0.04 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%