Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:50:46 2012

Optimize a model with 8231 rows, 3192 columns and 27606 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.18s
Presolved: 8229 rows, 3190 columns, 27312 nonzeros
Variable types: 0 continuous, 3190 integer (3190 binary)
Found heuristic solution: objective 56.0000000

Root relaxation: objective 2.000000e+00, 2511 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  112   56.00000    2.00000  96.4%     -    0s
H    0     0                      54.0000000    2.00000  96.3%     -    0s
H    0     0                       4.0000000    2.00000  50.0%     -    0s
     0     0    2.66667    0 2182    4.00000    2.66667  33.3%     -    1s
     0     0    2.66667    0  185    4.00000    2.66667  33.3%     -    4s
     0     2    2.66667    0  119    4.00000    2.66667  33.3%     -    6s

Cutting planes:
  Clique: 36
  Zero half: 1

Explored 17 nodes (38509 simplex iterations) in 7.83 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%