Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:17:15 2012

Optimize a model with 12928 rows, 4160 columns and 42688 nonzeros
Presolve time: 0.11s
Presolved: 12928 rows, 4160 columns, 42919 nonzeros
Variable types: 0 continuous, 4160 integer (4160 binary)
Found heuristic solution: objective 41.0000000

Root relaxation: objective 2.000000e+00, 3292 iterations, 0.07 seconds

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

     0     0    2.00000    0  128   41.00000    2.00000  95.1%     -    0s
H    0     0                      15.0000000    2.00000  86.7%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.00000    0  128    5.00000    2.00000  60.0%     -    1s
     0     0    2.00000    0  128    5.00000    2.00000  60.0%     -    7s
     0     0    2.00000    0  128    5.00000    2.00000  60.0%     -   12s
     0     0    2.00000    0  128    5.00000    2.00000  60.0%     -   18s
     0     0    2.00000    0  128    5.00000    2.00000  60.0%     -   25s
     0     0    2.00000    0  128    5.00000    2.00000  60.0%     -   32s
     0     2    2.00000    0  128    5.00000    2.00000  60.0%     -   48s
     1     3    2.52632    1  729    5.00000    2.00000  60.0% 33024   57s
     2     4    2.50000    1  741    5.00000    2.50000  50.0% 25601   64s
     3     5    3.00000    2  196    5.00000    2.50000  50.0% 19204   66s
*   20     7              16       4.0000000    2.50000  37.5%  2998   66s
    57     6 infeasible    2         4.00000    2.52632  36.8%  1349   70s
    76     9    3.00000    4  118    4.00000    2.66667  33.3%  1226   75s

Cutting planes:
  Clique: 89
  Zero half: 1

Explored 108 nodes (183202 simplex iterations) in 76.49 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%