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

Optimize a model with 1762 rows, 1681 columns and 9996 nonzeros
Presolve removed 980 rows and 1085 columns
Presolve time: 0.04s
Presolved: 782 rows, 596 columns, 8509 nonzeros
Variable types: 37 continuous, 559 integer (559 binary)

Root relaxation: objective 4.761922e+02, 151 iterations, 0.00 seconds

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

     0     0  476.19222    0   40          -  476.19222     -      -    0s
     0     0  485.10301    0   28          -  485.10301     -      -    0s
     0     0  485.34375    0   22          -  485.34375     -      -    0s
     0     0  485.34375    0   22          -  485.34375     -      -    0s
     0     0  485.34375    0   16          -  485.34375     -      -    0s
     0     2  485.50000    0   16          -  485.50000     -      -    0s
*   19    13              13     500.0000000  486.14777  2.77%   6.8    0s

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

Explored 89 nodes (731 simplex iterations) in 0.27 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.000000000000e+02, best bound 5.000000000000e+02, gap 0.0%