Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:13:43 2012

Optimize a model with 19609 rows, 5550 columns and 64008 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.69s
Presolved: 19681 rows, 5548 columns, 68954 nonzeros
Variable types: 0 continuous, 5548 integer (5548 binary)
Found heuristic solution: objective 74.0000000

Root relaxation: objective 2.000000e+00, 3847 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  148   74.00000    2.00000  97.3%     -    1s
H    0     0                      71.0000000    2.00000  97.2%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 3083    5.00000    3.00000  40.0%     -   11s
     0     0    3.00000    0 3083    5.00000    3.00000  40.0%     -   20s
     0     2    3.00000    0 3083    5.00000    3.00000  40.0%     -   38s
H   28     4                       4.0000000    3.00000  25.0%  1098   40s

Cutting planes:
  Gomory: 1
  Clique: 47
  Zero half: 3

Explored 29 nodes (92079 simplex iterations) in 44.82 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%