Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:21:05 2012

Optimize a model with 6299 rows, 2550 columns and 21198 nonzeros
Presolve removed 1702 rows and 2 columns
Presolve time: 0.15s
Presolved: 4647 rows, 2548 columns, 19464 nonzeros
Variable types: 0 continuous, 2548 integer (2548 binary)
Found heuristic solution: objective 50.0000000

Root relaxation: objective 3.000000e+00, 4764 iterations, 0.64 seconds

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

     0     0    3.00000    0 1402   50.00000    3.00000  94.0%     -    2s
H    0     0                      41.0000000    3.00000  92.7%     -    2s
H    0     0                      32.0000000    3.00000  90.6%     -    2s
H    0     0                      29.0000000    3.00000  89.7%     -    2s
     0     0    3.00000    0 1426   29.00000    3.00000  89.7%     -    2s
H    0     0                       4.0000000    3.00000  25.0%     -    3s
     0     0    3.00000    0   62    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0   94    4.00000    3.00000  25.0%     -    6s
     0     0    3.00000    0  114    4.00000    3.00000  25.0%     -    8s
     0     0    3.00000    0  107    4.00000    3.00000  25.0%     -    9s
     0     0    3.00000    0  111    4.00000    3.00000  25.0%     -   11s
     0     0    3.00000    0   99    4.00000    3.00000  25.0%     -   12s
     0     2    3.00000    0   99    4.00000    3.00000  25.0%     -   14s
     6     6    3.00000    1  112    4.00000    3.00000  25.0%   295   15s

Cutting planes:
  Gomory: 4
  Zero half: 16

Explored 19 nodes (66316 simplex iterations) in 15.41 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%