Gurobi 5.0.1 (linux64) logging started Thu Dec 20 11:42:24 2012

Optimize a model with 6722 rows, 6561 columns and 39407 nonzeros
Presolve removed 3620 rows and 3934 columns
Presolve time: 0.09s
Presolved: 3102 rows, 2627 columns, 16928 nonzeros
Variable types: 72 continuous, 2555 integer (2555 binary)

Root relaxation: objective 5.956542e+02, 387 iterations, 0.01 seconds

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

     0     0  595.65416    0   53          -  595.65416     -      -    0s
     0     0  597.80247    0   26          -  597.80247     -      -    0s
     0     0  598.55000    0   39          -  598.55000     -      -    0s
     0     0  599.01075    0   41          -  599.01075     -      -    0s
     0     0  599.01075    0   41          -  599.01075     -      -    0s
     0     0  599.01075    0   32          -  599.01075     -      -    0s
     0     2  599.01075    0   32          -  599.01075     -      -    0s
*  436   189              26     622.0000000  602.01075  3.21%  10.9    1s
H  493   188                     620.0000000  602.86224  2.76%  10.6    1s
H  603   206                     618.0000000  603.01075  2.43%  10.2    2s
   622   220  607.23894   11   19  618.00000  607.23894  1.74%  11.4    5s
H  656   212                     617.0000000  608.68855  1.35%  13.9    6s
*  711   191              43     616.0000000  609.85714  1.00%  14.1    6s

Cutting planes:
  Learned: 5
  Gomory: 24
  Cover: 21
  Clique: 8
  MIR: 40
  GUB cover: 6
  Zero half: 4

Explored 761 nodes (11382 simplex iterations) in 6.85 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.160000000000e+02, best bound 6.160000000000e+02, gap 0.0%