Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:10:26 2012

Optimize a model with 8777 rows, 3306 columns and 29353 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.19s
Presolved: 8832 rows, 3304 columns, 32294 nonzeros
Variable types: 0 continuous, 3304 integer (3304 binary)
Found heuristic solution: objective 57.0000000

Root relaxation: objective 2.000000e+00, 2375 iterations, 0.06 seconds

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

     0     0    2.00000    0  112   57.00000    2.00000  96.5%     -    0s
H    0     0                      49.0000000    2.00000  95.9%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.66667    0 2261    5.00000    2.66667  46.7%     -    1s
     0     0    2.66667    0  150    5.00000    2.66667  46.7%     -    3s
H    0     0                       4.0000000    2.66667  33.3%     -    5s
     0     2    2.66667    0  150    4.00000    2.66667  33.3%     -    5s

Cutting planes:
  Clique: 52
  Zero half: 9

Explored 21 nodes (28512 simplex iterations) in 7.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%