Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:06:15 2012

Optimize a model with 19808 rows, 5112 columns and 64182 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.69s
Presolved: 19806 rows, 5110 columns, 63624 nonzeros
Variable types: 0 continuous, 5110 integer (5110 binary)
Found heuristic solution: objective 71.0000000

Root relaxation: objective 2.000000e+00, 3736 iterations, 0.17 seconds

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

     0     0    2.00000    0  142   71.00000    2.00000  97.2%     -    1s
H    0     0                      69.0000000    2.00000  97.1%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 3836    5.00000    3.00000  40.0%     -   25s
     0     0    3.00730    0 3868    5.00000    3.00730  39.9%     -   30s
     0     0    3.00730    0 3968    5.00000    3.00730  39.9%     -   31s
     0     0    3.00730    0 3940    5.00000    3.00730  39.9%     -   40s
     0     0    3.00730    0 3883    5.00000    3.00730  39.9%     -   49s
H    0     0                       4.0000000    3.00730  24.8%     -   49s

Cutting planes:
  Clique: 46
  Zero half: 3

Explored 0 nodes (119800 simplex iterations) in 49.48 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%