Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:15:53 2012

Optimize a model with 3559 rows, 1640 columns and 12118 nonzeros
Presolve removed 642 rows and 2 columns
Presolve time: 0.10s
Presolved: 2917 rows, 1638 columns, 10452 nonzeros
Variable types: 0 continuous, 1638 integer (1638 binary)
Found heuristic solution: objective 40.0000000

Root relaxation: objective 3.000000e+00, 2230 iterations, 0.13 seconds

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

     0     0    3.00000    0   40   40.00000    3.00000  92.5%     -    0s
H    0     0                      23.0000000    3.00000  87.0%     -    0s
H    0     0                       9.0000000    3.00000  66.7%     -    0s
H    0     0                       5.0000000    3.00000  40.0%     -    0s
     0     0    3.00000    0  120    5.00000    3.00000  40.0%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0   54    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   50    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   51    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   73    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   96    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   96    4.00000    3.00000  25.0%     -    3s
     0     2    3.00000    0   96    4.00000    3.00000  25.0%     -    4s
     4     4    3.00000    1   53    4.00000    3.00000  25.0%   326    6s
     9     8    3.00000    1   77    4.00000    3.00000  25.0%   145   10s
    14    13    3.00000   11   93    4.00000    3.00000  25.0%  4118   15s

Cutting planes:
  Gomory: 1
  Zero half: 5

Explored 37 nodes (94556 simplex iterations) in 16.61 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%