Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:51:47 2012

Optimize a model with 13143 rows, 3906 columns and 43026 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.35s
Presolved: 13203 rows, 3904 columns, 46446 nonzeros
Variable types: 0 continuous, 3904 integer (3904 binary)
Found heuristic solution: objective 62.0000000

Root relaxation: objective 2.000000e+00, 2912 iterations, 0.11 seconds

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

     0     0    2.00000    0  124   62.00000    2.00000  96.8%     -    0s
H    0     0                      60.0000000    2.00000  96.7%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0 2503    5.00000    3.00000  40.0%     -    2s
     0     0    3.00000    0 2397    5.00000    3.00000  40.0%     -    4s
H    0     0                       4.0000000    3.00000  25.0%     -    4s
     0     0    3.00000    0 2419    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0  114    4.00000    3.00000  25.0%     -   13s

Cutting planes:
  Clique: 17
  Zero half: 2

Explored 0 nodes (40204 simplex iterations) in 15.23 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%