Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:01:31 2012

Optimize a model with 5711 rows, 2352 columns and 19246 nonzeros
Presolve removed 1346 rows and 2 columns
Presolve time: 0.13s
Presolved: 4365 rows, 2350 columns, 15896 nonzeros
Variable types: 0 continuous, 2350 integer (2350 binary)
Found heuristic solution: objective 48.0000000

Root relaxation: objective 3.000000e+00, 4075 iterations, 0.51 seconds

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

     0     0    3.00000    0   56   48.00000    3.00000  93.8%     -    2s
H    0     0                      14.0000000    3.00000  78.6%     -    2s
H    0     0                       5.0000000    3.00000  40.0%     -    2s
     0     0    3.00000    0  178    5.00000    3.00000  40.0%     -    2s
H    0     0                       4.0000000    3.00000  25.0%     -    2s
     0     0    3.00000    0   62    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   74    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0  266    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0  203    4.00000    3.00000  25.0%     -    6s
     0     0    3.00000    0  114    4.00000    3.00000  25.0%     -    9s
     0     0    3.00000    0  114    4.00000    3.00000  25.0%     -   10s
     0     0    3.00000    0  121    4.00000    3.00000  25.0%     -   12s
     0     0    3.00000    0  114    4.00000    3.00000  25.0%     -   14s
     0     0    3.00000    0  117    4.00000    3.00000  25.0%     -   15s
     0     0    3.00000    0  116    4.00000    3.00000  25.0%     -   15s
     0     2    3.00000    0  114    4.00000    3.00000  25.0%     -   17s
     4     4    3.00000    1  758    4.00000    3.00000  25.0%   869   22s
     5     5    3.00000    1  101    4.00000    3.00000  25.0%   695   25s

Cutting planes:
  Gomory: 10
  Zero half: 79

Explored 7 nodes (138740 simplex iterations) in 29.17 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%