Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:26:27 2012

Optimize a model with 8470 rows, 3080 columns and 28270 nonzeros
Presolve time: 0.08s
Presolved: 8470 rows, 3080 columns, 28642 nonzeros
Variable types: 0 continuous, 3080 integer (3080 binary)
Found heuristic solution: objective 29.0000000

Root relaxation: objective 2.000000e+00, 2804 iterations, 0.06 seconds

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

     0     0    2.00000    0  110   29.00000    2.00000  93.1%     -    0s
H    0     0                      12.0000000    2.00000  83.3%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.00000    0  110    5.00000    2.00000  60.0%     -    0s
     0     0    2.00000    0  110    5.00000    2.00000  60.0%     -    3s
     0     0    2.00000    0  110    5.00000    2.00000  60.0%     -    6s
H    0     0                       4.0000000    2.00000  50.0%     -    6s
     0     0    2.00000    0  110    4.00000    2.00000  50.0%     -    9s
     0     0    2.00000    0  110    4.00000    2.00000  50.0%     -   11s
     0     0    2.00000    0  110    4.00000    2.00000  50.0%     -   13s
     0     2    2.00000    0  110    4.00000    2.00000  50.0%     -   19s
     1     3    3.00000    1  533    4.00000    2.00000  50.0% 18444   23s
     2     4    3.00000    1  389    4.00000    3.00000  25.0% 21226   30s
    41     3     cutoff    4         4.00000    3.00000  25.0%  1664   35s
    59     1     cutoff    5         4.00000    3.00000  25.0%  1530   40s

Cutting planes:
  Clique: 130
  Zero half: 14

Explored 65 nodes (145973 simplex iterations) in 40.93 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%