Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:19 2012

Optimize a model with 2352 rows, 462 columns and 7434 nonzeros
Presolve removed 945 rows and 0 columns
Presolve time: 0.04s
Presolved: 1407 rows, 462 columns, 7161 nonzeros
Variable types: 0 continuous, 462 integer (462 binary)
Found heuristic solution: objective 15.0000000

Root relaxation: objective 4.000000e+00, 899 iterations, 0.05 seconds

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

     0     0    4.00000    0   84   15.00000    4.00000  73.3%     -    0s
H    0     0                       8.0000000    4.00000  50.0%     -    0s
H    0     0                       7.0000000    4.00000  42.9%     -    0s
     0     0    4.00000    0   84    7.00000    4.00000  42.9%     -    0s
H    0     0                       6.0000000    4.00000  33.3%     -    0s
     0     0    4.00000    0   84    6.00000    4.00000  33.3%     -    0s
     0     0    4.00000    0   84    6.00000    4.00000  33.3%     -    0s
     0     0    4.00000    0  107    6.00000    4.00000  33.3%     -    0s
     0     0    4.00000    0  107    6.00000    4.00000  33.3%     -    0s
     0     0    4.00000    0  107    6.00000    4.00000  33.3%     -    0s
     0     2    4.00000    0  107    6.00000    4.00000  33.3%     -    0s

Cutting planes:
  Gomory: 1

Explored 39 nodes (6251 simplex iterations) in 0.78 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%