Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:32:45 2012

Optimize a model with 13793 rows, 4422 columns and 45472 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.42s
Presolved: 13791 rows, 4420 columns, 45054 nonzeros
Variable types: 0 continuous, 4420 integer (4420 binary)
Found heuristic solution: objective 66.0000000

Root relaxation: objective 2.000000e+00, 3325 iterations, 0.10 seconds

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

     0     0    2.00000    0  132   66.00000    2.00000  97.0%     -    0s
H    0     0                      64.0000000    2.00000  96.9%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0 2784    5.00000    3.00000  40.0%     -    3s
     0     0    3.00000    0 2757    5.00000    3.00000  40.0%     -    4s
     0     0    3.00000    0 1637    5.00000    3.00000  40.0%     -    6s
     0     0    3.00000    0 2787    5.00000    3.00000  40.0%     -    7s
     0     0    3.00000    0  231    5.00000    3.00000  40.0%     -   15s
H    0     0                       4.0000000    3.00000  25.0%     -   16s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -   18s

Cutting planes:
  Clique: 71
  Zero half: 63

Explored 0 nodes (51725 simplex iterations) in 18.45 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%