Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:24:29 2012

Optimize a model with 6632 rows, 4556 columns and 24118 nonzeros
Presolve removed 404 rows and 2 columns
Presolve time: 0.20s
Presolved: 6295 rows, 4554 columns, 27416 nonzeros
Variable types: 0 continuous, 4554 integer (4554 binary)
Found heuristic solution: objective 67.0000000

Root relaxation: objective 4.000000e+00, 4851 iterations, 0.32 seconds

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

     0     0    4.00000    0   70   67.00000    4.00000  94.0%     -    0s
H    0     0                       6.0000000    4.00000  33.3%     -    1s
     0     0    4.00000    0  422    6.00000    4.00000  33.3%     -    1s
H    0     0                       5.0000000    4.00000  20.0%     -    1s
H    0     0                       4.0000000    4.00000   0.0%     -    1s

Cutting planes:
  Gomory: 1
  Zero half: 3

Explored 0 nodes (10228 simplex iterations) in 1.48 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%