Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:41:13 2012

Optimize a model with 14849 rows, 4422 columns and 48640 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.45s
Presolved: 14913 rows, 4420 columns, 52546 nonzeros
Variable types: 0 continuous, 4420 integer (4420 binary)
Found heuristic solution: objective 66.0000000

Root relaxation: objective 2.000000e+00, 3142 iterations, 0.12 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                      65.0000000    2.00000  96.9%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.66667    0  502    5.00000    2.66667  46.7%     -    8s
     0     0    2.68817    0 4010    5.00000    2.68817  46.2%     -    9s
     0     0    2.68817    0 3961    5.00000    2.68817  46.2%     -   11s
     0     0    2.68817    0 3972    5.00000    2.68817  46.2%     -   12s
     0     0    2.68817    0 3669    5.00000    2.68817  46.2%     -   14s
     0     0    2.68817    0 3700    5.00000    2.68817  46.2%     -   15s
H    0     0                       4.0000000    2.68817  32.8%     -   18s
     0     0    2.68817    0 3723    4.00000    2.68817  32.8%     -   19s
     0     0    2.68817    0 3725    4.00000    2.68817  32.8%     -   22s
     0     0    2.68817    0 3718    4.00000    2.68817  32.8%     -   23s
     0     1    3.00000    0 3718    4.00000    3.00000  25.0%     -   24s

Cutting planes:
  Clique: 319
  Zero half: 4

Explored 4 nodes (54274 simplex iterations) in 24.61 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%