Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:01:22 2012

Optimize a model with 13041 rows, 4032 columns and 42903 nonzeros
Presolve time: 0.10s
Presolved: 13041 rows, 4032 columns, 43121 nonzeros
Variable types: 0 continuous, 4032 integer (4032 binary)
Found heuristic solution: objective 40.0000000

Root relaxation: objective 2.000000e+00, 4258 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  126   40.00000    2.00000  95.0%     -    1s
H    0     0                      12.0000000    2.00000  83.3%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -    2s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -    8s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -   14s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -   23s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -   30s
     0     0    2.00000    0  126    5.00000    2.00000  60.0%     -   34s
     0     2    2.00000    0  126    5.00000    2.00000  60.0%     -   49s
     1     3    2.50000    1  127    5.00000    2.00000  60.0% 19727   53s
     2     4    3.00000    1  741    5.00000    2.50000  50.0% 18266   60s
H   27    11                       4.0000000    2.75000  31.2%  1945   65s
    38     8     cutoff    6         4.00000    3.00000  25.0%  1867   70s
    62     8    3.00000    4  110    4.00000    3.00000  25.0%  1459   75s
    91     3     cutoff    5         4.00000    3.00000  25.0%  1296   80s

Cutting planes:
  Clique: 135

Explored 99 nodes (212218 simplex iterations) in 84.26 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%