Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:09:24 2012

Optimize a model with 3432 rows, 600 columns and 10800 nonzeros
Presolve removed 1068 rows and 0 columns
Presolve time: 0.05s
Presolved: 2364 rows, 600 columns, 13248 nonzeros
Variable types: 0 continuous, 600 integer (600 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 6.000000e+00, 1958 iterations, 0.22 seconds

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

     0     0    6.00000    0   40   18.00000    6.00000  66.7%     -    0s
H    0     0                       7.0000000    6.00000  14.3%     -    0s
     0     0    6.00000    0   37    7.00000    6.00000  14.3%     -    0s
     0     0    6.00000    0   68    7.00000    6.00000  14.3%     -    0s
     0     0    6.00000    0   23    7.00000    6.00000  14.3%     -    0s
     0     0    6.00000    0   46    7.00000    6.00000  14.3%     -    0s
     0     0    6.00000    0   39    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   42    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   14    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   70    7.00000    6.00000  14.3%     -    1s
     0     0    6.00000    0   24    7.00000    6.00000  14.3%     -    2s
     0     0    6.00000    0   45    7.00000    6.00000  14.3%     -    2s
     0     0    6.00000    0   45    7.00000    6.00000  14.3%     -    2s
     0     2    6.00000    0   45    7.00000    6.00000  14.3%     -    2s
     9     8    6.00000    1   23    7.00000    6.00000  14.3%  75.1    5s

Cutting planes:
  Gomory: 1
  Zero half: 1

Explored 23 nodes (41027 simplex iterations) in 7.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%