Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:20:09 2012

Optimize a model with 12138 rows, 3782 columns and 39892 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.32s
Presolved: 12136 rows, 3780 columns, 39494 nonzeros
Variable types: 0 continuous, 3780 integer (3780 binary)
Found heuristic solution: objective 59.0000000

Root relaxation: objective 2.000000e+00, 2763 iterations, 0.09 seconds

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

     0     0    2.00000    0  122   59.00000    2.00000  96.6%     -    0s
H    0     0                      47.0000000    2.00000  95.7%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.66667    0 2486    5.00000    2.66667  46.7%     -    2s
     0     0    2.66667    0  169    5.00000    2.66667  46.7%     -    6s
     0     2    2.66667    0  163    5.00000    2.66667  46.7%     -    7s
    16    16    4.00000   14  106    5.00000    2.66667  46.7%   808   10s
*   27     8              24       4.0000000    2.66667  33.3%   575   10s

Cutting planes:
  Gomory: 1
  Clique: 66
  Zero half: 5

Explored 38 nodes (45418 simplex iterations) in 11.23 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%