Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:12:36 2012

Optimize a model with 3154 rows, 1482 columns and 10792 nonzeros
Presolve removed 723 rows and 38 columns
Presolve time: 0.06s
Presolved: 2431 rows, 1444 columns, 9158 nonzeros
Variable types: 0 continuous, 1444 integer (1444 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.000000e+00, 2963 iterations, 0.21 seconds

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

     0     0    3.00000    0   76   26.00000    3.00000  88.5%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0  215    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   75    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   98    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   97    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0  102    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   99    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   79    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   98    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0  105    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0  105    4.00000    3.00000  25.0%     -    4s
     0     2    3.00000    0  105    4.00000    3.00000  25.0%     -    5s
    11     9    3.00000   15  138    4.00000    3.00000  25.0%  2310   10s

Cutting planes:
  Gomory: 3
  Zero half: 4

Explored 19 nodes (81134 simplex iterations) in 11.50 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%