Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:26:02 2012

Optimize a model with 4214 rows, 1892 columns and 14362 nonzeros
Presolve removed 946 rows and 0 columns
Presolve time: 0.09s
Presolved: 3268 rows, 1892 columns, 12212 nonzeros
Variable types: 0 continuous, 1892 integer (1892 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 3.000000e+00, 3567 iterations, 0.26 seconds

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

     0     0    3.00000    0   68   25.00000    3.00000  88.0%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0  143    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   92    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0  106    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   61    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0  100    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0  100    4.00000    3.00000  25.0%     -    4s
     0     2    3.00000    0  100    4.00000    3.00000  25.0%     -    5s
     8     7    3.00000    1   52    4.00000    3.00000  25.0%   353   10s
    13    10    3.00000   10   70    4.00000    3.00000  25.0%  4329   15s

Cutting planes:
  Gomory: 18
  Zero half: 22

Explored 16 nodes (96352 simplex iterations) in 15.61 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%