Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:34:40 2012

Optimize a model with 15329 rows, 4970 columns and 50608 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.51s
Presolved: 15397 rows, 4968 columns, 55070 nonzeros
Variable types: 0 continuous, 4968 integer (4968 binary)
Found heuristic solution: objective 70.0000000

Root relaxation: objective 2.000000e+00, 3610 iterations, 0.13 seconds

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

     0     0    2.00000    0  140   70.00000    2.00000  97.1%     -    0s
H    0     0                      68.0000000    2.00000  97.1%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0 2566    5.00000    3.00000  40.0%     -    9s
     0     0    3.00000    0 2406    5.00000    3.00000  40.0%     -   12s
H    0     0                       4.0000000    3.00000  25.0%     -   12s
     0     0    3.00000    0 1906    4.00000    3.00000  25.0%     -   13s
     0     0    3.00000    0 2578    4.00000    3.00000  25.0%     -   15s
     0     0    3.00000    0  235    4.00000    3.00000  25.0%     -   21s

Cutting planes:
  Clique: 18
  Zero half: 1

Explored 0 nodes (59586 simplex iterations) in 22.80 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%