Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:57:05 2012

Optimize a model with 6485 rows, 2256 columns and 21477 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.10s
Presolved: 6530 rows, 2254 columns, 23410 nonzeros
Variable types: 0 continuous, 2254 integer (2254 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 2.000000e+00, 1621 iterations, 0.04 seconds

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

     0     0    2.00000    0   94   47.00000    2.00000  95.7%     -    0s
H    0     0                      30.0000000    2.00000  93.3%     -    0s
H    0     0                       4.0000000    2.00000  50.0%     -    0s
     0     0    2.66667    0  167    4.00000    2.66667  33.3%     -    0s
     0     0    2.67669    0 1965    4.00000    2.67669  33.1%     -    0s
     0     0    2.67669    0 1977    4.00000    2.67669  33.1%     -    1s
     0     0    2.67669    0 1718    4.00000    2.67669  33.1%     -    3s
     0     0    2.67669    0 1769    4.00000    2.67669  33.1%     -    4s
     0     0    2.67669    0 1768    4.00000    2.67669  33.1%     -    5s
     0     0    2.67669    0 1766    4.00000    2.67669  33.1%     -    6s
     0     0    2.67669    0 1767    4.00000    2.67669  33.1%     -    7s
     0     0    2.67669    0 1829    4.00000    2.67669  33.1%     -    8s
     0     0    2.67669    0 1844    4.00000    2.67669  33.1%     -    9s
     0     0    2.67669    0 1719    4.00000    2.67669  33.1%     -   10s
     0     1    3.00000    0 1719    4.00000    3.00000  25.0%     -   12s

Cutting planes:
  Clique: 72
  Zero half: 10

Explored 4 nodes (36984 simplex iterations) in 12.51 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%