Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:55:41 2012

Optimize a model with 5028 rows, 2256 columns and 17106 nonzeros
Presolve removed 1130 rows and 2 columns
Presolve time: 0.10s
Presolved: 3945 rows, 2254 columns, 16564 nonzeros
Variable types: 0 continuous, 2254 integer (2254 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 3.000000e+00, 3527 iterations, 0.37 seconds

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

     0     0    3.00000    0   70   47.00000    3.00000  93.6%     -    1s
H    0     0                      23.0000000    3.00000  87.0%     -    1s
H    0     0                       5.0000000    3.00000  40.0%     -    1s
     0     0    3.00000    0   92    5.00000    3.00000  40.0%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0  106    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0  102    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0  100    4.00000    3.00000  25.0%     -    6s
     0     0    3.00000    0  187    4.00000    3.00000  25.0%     -    8s
     0     0    3.00000    0   94    4.00000    3.00000  25.0%     -    9s
     0     2    3.00000    0   83    4.00000    3.00000  25.0%     -   10s
     6     6    3.00000    1   73    4.00000    3.00000  25.0%   876   15s
     8     7    3.00000    1  114    4.00000    3.00000  25.0%   657   20s
    11    10    3.00000   12  606    4.00000    3.00000  25.0%  5279   28s

Cutting planes:
  Gomory: 1
  Zero half: 27

Explored 16 nodes (118122 simplex iterations) in 28.98 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%