Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:45:07 2012

Optimize a model with 22039 rows, 5852 columns and 71590 nonzeros
Presolve removed 3 rows and 78 columns
Presolve time: 0.77s
Presolved: 22036 rows, 5774 columns, 70934 nonzeros
Variable types: 0 continuous, 5774 integer (5774 binary)
Found heuristic solution: objective 76.0000000

Root relaxation: objective 2.000000e+00, 4066 iterations, 0.18 seconds

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

     0     0    2.00000    0  150   76.00000    2.00000  97.4%     -    1s
H    0     0                      74.0000000    2.00000  97.3%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 3766    5.00000    3.00000  40.0%     -   17s
     0     0    3.00000    0 3588    5.00000    3.00000  40.0%     -   22s
     0     0    3.00000    0 2730    5.00000    3.00000  40.0%     -   23s
     0     0    3.00000    0 2069    5.00000    3.00000  40.0%     -   25s
     0     0    3.00000    0 2069    5.00000    3.00000  40.0%     -   36s
     0     2    3.00000    0 2069    5.00000    3.00000  40.0%     -   62s
H   27     5                       4.0000000    3.00000  25.0%  1286   68s

Cutting planes:
  Clique: 43
  Zero half: 1

Explored 28 nodes (112243 simplex iterations) in 72.37 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%