Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:10:33 2012

Optimize a model with 8492 rows, 3306 columns and 28498 nonzeros
Presolve removed 84 rows and 2 columns
Presolve time: 0.19s
Presolved: 8465 rows, 3304 columns, 31300 nonzeros
Variable types: 0 continuous, 3304 integer (3304 binary)
Found heuristic solution: objective 57.0000000

Root relaxation: objective 2.500000e+00, 6460 iterations, 0.93 seconds

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

     0     0    2.50000    0  287   57.00000    2.50000  95.6%     -    3s
H    0     0                      47.0000000    2.50000  94.7%     -    3s
H    0     0                      45.0000000    2.50000  94.4%     -    3s
H    0     0                       6.0000000    2.50000  58.3%     -    3s
     0     0    3.08716    0 1932    6.00000    3.08716  48.5%     -    4s
H    0     0                       4.0000000    3.08716  22.8%     -    5s

Cutting planes:
  Gomory: 1
  Clique: 47
  Zero half: 1

Explored 0 nodes (20024 simplex iterations) in 5.21 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%