Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:22:04 2012

Optimize a model with 3737 rows, 1806 columns and 12808 nonzeros
Presolve removed 717 rows and 44 columns
Presolve time: 0.10s
Presolved: 3020 rows, 1762 columns, 10942 nonzeros
Variable types: 0 continuous, 1762 integer (1762 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 3.000000e+00, 2536 iterations, 0.17 seconds

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

     0     0    3.00000    0   38   42.00000    3.00000  92.9%     -    1s
H    0     0                      24.0000000    3.00000  87.5%     -    1s
H    0     0                       8.0000000    3.00000  62.5%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0   78    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0  120    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   60    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   86    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0  325    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0  325    4.00000    3.00000  25.0%     -    4s
     0     2    3.00000    0  325    4.00000    3.00000  25.0%     -    6s
     6     6    3.00000    1   72    4.00000    3.00000  25.0%   817   10s

Cutting planes:
  Gomory: 18
  Zero half: 46

Explored 7 nodes (73697 simplex iterations) in 10.84 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%