Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:20:58 2012

Optimize a model with 21680 rows, 5402 columns and 70078 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.69s
Presolved: 21678 rows, 5400 columns, 69484 nonzeros
Variable types: 0 continuous, 5400 integer (5400 binary)
Found heuristic solution: objective 73.0000000

Root relaxation: objective 2.000000e+00, 3620 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  146   73.00000    2.00000  97.3%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 3846    5.00000    3.00000  40.0%     -   13s
     0     0    3.00000    0 3846    5.00000    3.00000  40.0%     -   25s
     0     2    3.00000    0 3846    5.00000    3.00000  40.0%     -   41s
     4     4    3.25000    3  454    5.00000    3.00000  40.0%  8228   45s
    29    13    4.00000    5  134    5.00000    3.66667  26.7%  1992   50s
   219    37    4.00000   26  104    5.00000    4.00000  20.0%   550   55s
H  273     2                       4.0000000    4.00000   0.0%   489   57s

Cutting planes:
  Clique: 93

Explored 273 nodes (198616 simplex iterations) in 57.93 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%