Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:24:13 2012

Optimize a model with 4241 rows, 1806 columns and 14320 nonzeros
Presolve removed 1136 rows and 2 columns
Presolve time: 0.11s
Presolved: 3147 rows, 1804 columns, 13248 nonzeros
Variable types: 0 continuous, 1804 integer (1804 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 3.000000e+00, 2785 iterations, 0.28 seconds

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

     0     0    3.00000    0   55   42.00000    3.00000  92.9%     -    1s
H    0     0                      41.0000000    3.00000  92.7%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0  132    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   82    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   96    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   87    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   90    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0  126    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0  795    4.00000    3.00000  25.0%     -    6s
     0     0    3.00000    0   88    4.00000    3.00000  25.0%     -    6s
     0     2    3.00000    0   86    4.00000    3.00000  25.0%     -    6s
     5     5    3.00000    1   76    4.00000    3.00000  25.0%   149   10s
    10    10    3.00000   16   64    4.00000    3.00000  25.0%  3873   16s
    15    11    3.00000   18 1047    4.00000    3.00000  25.0%  2823   28s

Cutting planes:
  Gomory: 4
  Zero half: 10

Explored 27 nodes (95706 simplex iterations) in 29.12 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%