Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:09:23 2012

Optimize a model with 13481 rows, 4032 columns and 44161 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.39s
Presolved: 13479 rows, 4030 columns, 43733 nonzeros
Variable types: 0 continuous, 4030 integer (4030 binary)
Found heuristic solution: objective 63.0000000

Root relaxation: objective 2.000000e+00, 3092 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  126   63.00000    2.00000  96.8%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0  201    5.00000    3.00000  40.0%     -    3s
     0     0    3.01667    0 2899    5.00000    3.01667  39.7%     -    3s
H    0     0                       4.0000000    3.01667  24.6%     -    5s

Cutting planes:
  Clique: 48
  Zero half: 6

Explored 0 nodes (18139 simplex iterations) in 5.19 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%