Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:09:11 2012

Optimize a model with 2276 rows, 1122 columns and 7786 nonzeros
Presolve removed 497 rows and 2 columns
Presolve time: 0.09s
Presolved: 1812 rows, 1120 columns, 7546 nonzeros
Variable types: 0 continuous, 1120 integer (1120 binary)
Found heuristic solution: objective 33.0000000

Root relaxation: objective 3.000000e+00, 1267 iterations, 0.05 seconds

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

     0     0    3.00000    0   49   33.00000    3.00000  90.9%     -    0s
H    0     0                      27.0000000    3.00000  88.9%     -    0s
H    0     0                       6.0000000    3.00000  50.0%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0   65    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   59    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   60    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   60    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   53    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   64    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   89    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   89    4.00000    3.00000  25.0%     -    1s
     0     2    3.00000    0   89    4.00000    3.00000  25.0%     -    1s
    15    12    3.00000   15   32    4.00000    3.00000  25.0%  1420    5s

Cutting planes:
  Gomory: 4
  Clique: 1
  Zero half: 4

Explored 26 nodes (44825 simplex iterations) in 6.43 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%