Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:18:42 2012

Optimize a model with 3566 rows, 1722 columns and 12216 nonzeros
Presolve removed 699 rows and 2 columns
Presolve time: 0.10s
Presolved: 2867 rows, 1720 columns, 10477 nonzeros
Variable types: 0 continuous, 1720 integer (1720 binary)
Found heuristic solution: objective 41.0000000

Root relaxation: objective 3.000000e+00, 2346 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   67   41.00000    3.00000  92.7%     -    0s
H    0     0                      17.0000000    3.00000  82.4%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0   63    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0  150    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   44    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   56    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   46    4.00000    3.00000  25.0%     -    2s
     0     2    3.00000    0   42    4.00000    3.00000  25.0%     -    2s
     7     6    3.00000    1   56    4.00000    3.00000  25.0%   331    5s

Cutting planes:
  Gomory: 23
  Zero half: 77

Explored 9 nodes (58316 simplex iterations) in 7.30 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%