Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:13:47 2012

Optimize a model with 4134 rows, 702 columns and 13000 nonzeros
Presolve time: 0.05s
Presolved: 4134 rows, 702 columns, 20246 nonzeros
Variable types: 0 continuous, 702 integer (702 binary)
Found heuristic solution: objective 9.0000000

Root relaxation: objective 2.000000e+00, 845 iterations, 0.03 seconds

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

     0     0    2.00000    0   52    9.00000    2.00000  77.8%     -    0s
H    0     0                       8.0000000    2.00000  75.0%     -    0s
     0     0    2.00000    0   52    8.00000    2.00000  75.0%     -    0s
     0     0    2.00000    0   52    8.00000    2.00000  75.0%     -    0s
     0     0    3.50000    0   53    8.00000    3.50000  56.3%     -    0s
H    0     0                       7.0000000    3.50000  50.0%     -    0s
H    0     0                       6.0000000    3.50000  41.7%     -    0s

Cutting planes:
  Clique: 228
  Zero half: 117

Explored 0 nodes (6013 simplex iterations) in 0.86 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%