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

Optimize a model with 1762 rows, 1681 columns and 9985 nonzeros
Presolve removed 1151 rows and 1242 columns
Presolve time: 0.03s
Presolved: 611 rows, 439 columns, 6508 nonzeros
Variable types: 33 continuous, 406 integer (406 binary)

Root relaxation: objective 4.694250e+02, 132 iterations, 0.00 seconds

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

     0     0  469.42499    0   45          -  469.42499     -      -    0s
H    0     0                     488.0000000  469.42499  3.81%     -    0s
     0     0  476.98346    0    9  488.00000  476.98346  2.26%     -    0s
     0     0  476.98346    0   45  488.00000  476.98346  2.26%     -    0s
     0     0  476.98346    0    9  488.00000  476.98346  2.26%     -    0s
H    0     0                     478.0000000  476.98346  0.21%     -    0s

Cutting planes:
  Learned: 1
  Gomory: 4
  Cover: 2
  Clique: 2
  MIR: 1

Explored 0 nodes (376 simplex iterations) in 0.11 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%