Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:33:10 2012

Optimize a model with 9971 rows, 3540 columns and 33217 nonzeros
Presolve time: 0.09s
Presolved: 9971 rows, 3540 columns, 33535 nonzeros
Variable types: 0 continuous, 3540 integer (3540 binary)
Found heuristic solution: objective 35.0000000

Root relaxation: objective 2.000000e+00, 3522 iterations, 0.12 seconds

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

     0     0    2.00000    0  118   35.00000    2.00000  94.3%     -    0s
H    0     0                       8.0000000    2.00000  75.0%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -    1s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -    5s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -    8s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -   12s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -   16s
     0     0    2.00000    0  118    5.00000    2.00000  60.0%     -   19s
H    0     0                       4.0000000    2.00000  50.0%     -   21s
     0     2    2.00000    0  118    4.00000    2.00000  50.0%     -   27s
     1     3    3.00000    1  671    4.00000    2.00000  50.0% 31111   34s
     2     4    3.00000    1  677    4.00000    3.00000  25.0% 26110   41s
     9     3     cutoff    3         4.00000    3.00000  25.0%  7197   45s
    27     3     cutoff    6         4.00000    3.00000  25.0%  3291   50s
    44     2     cutoff    6         4.00000    3.00000  25.0%  2502   55s

Cutting planes:
  Clique: 123

Explored 51 nodes (177311 simplex iterations) in 55.81 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%