Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:28:53 2012

Optimize a model with 12626 rows, 3782 columns and 41356 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.33s
Presolved: 12685 rows, 3780 columns, 44663 nonzeros
Variable types: 0 continuous, 3780 integer (3780 binary)
Found heuristic solution: objective 61.0000000

Root relaxation: objective 2.000000e+00, 2682 iterations, 0.08 seconds

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

     0     0    2.00000    0  122   61.00000    2.00000  96.7%     -    0s
H    0     0                      56.0000000    2.00000  96.4%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0  389    5.00000    3.00000  40.0%     -    2s
     0     0    3.05357    0 2687    5.00000    3.05357  38.9%     -    2s
H    0     0                       4.0000000    3.05357  23.7%     -    4s

Cutting planes:
  Clique: 111
  Zero half: 4

Explored 0 nodes (15251 simplex iterations) in 4.54 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%