Gurobi 5.0.1 (linux64) logging started Sat Nov 17 10:05:32 2012

Optimize a model with 79055 rows, 59780 columns and 295726 nonzeros
Presolve removed 14 rows and 3416 columns (presolve time = 5s) ...
Presolve removed 16 rows and 3418 columns
Presolve time: 6.33s
Presolved: 79039 rows, 56362 columns, 291662 nonzeros
Variable types: 0 continuous, 56362 integer (56362 binary)
Found heuristic solution: objective 244.0000000

Root relaxation: objective 2.000000e+00, 39577 iterations, 3.91 seconds
Total elapsed time = 16.39s

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

     0     0    2.00000    0  448  244.00000    2.00000  99.2%     -   18s
H    0     0                     216.0000000    2.00000  99.1%     -   18s
H    0     0                       4.0000000    2.00000  50.0%     -   18s
     0     0    2.20000    0  582    4.00000    2.20000  45.0%     -   56s
H    0     0                       3.0000000    2.20000  26.7%     -   56s

Cutting planes:
  Gomory: 1
  Zero half: 20

Explored 0 nodes (185034 simplex iterations) in 56.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%