Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:44:15 2012

Optimize a model with 16487 rows, 5256 columns and 54358 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.58s
Presolved: 16557 rows, 5254 columns, 59084 nonzeros
Variable types: 0 continuous, 5254 integer (5254 binary)
Found heuristic solution: objective 72.0000000

Root relaxation: objective 2.000000e+00, 3826 iterations, 0.15 seconds

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

     0     0    2.00000    0  144   72.00000    2.00000  97.2%     -    1s
H    0     0                      65.0000000    2.00000  96.9%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
H    0     0                       4.0000000    2.00000  50.0%     -    1s
     0     0    2.66667    0  189    4.00000    2.66667  33.3%     -    9s
     0     0    2.66986    0 4773    4.00000    2.66986  33.3%     -    9s
     0     0    2.66986    0 4787    4.00000    2.66986  33.3%     -   11s
     0     0    2.66986    0 4391    4.00000    2.66986  33.3%     -   14s
     0     2    2.80000    0 4391    4.00000    2.80000  30.0%     -   28s

Cutting planes:
  Clique: 114
  Zero half: 3

Explored 7 nodes (49178 simplex iterations) in 29.84 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%