Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:43:54 2012

Optimize a model with 12351 rows, 4160 columns and 40894 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.37s
Presolved: 12413 rows, 4158 columns, 44604 nonzeros
Variable types: 0 continuous, 4158 integer (4158 binary)
Found heuristic solution: objective 64.0000000

Root relaxation: objective 2.000000e+00, 3049 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  128   64.00000    2.00000  96.9%     -    0s
H    0     0                      61.0000000    2.00000  96.7%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0 2590    5.00000    3.00000  40.0%     -    2s
H    0     0                       4.0000000    3.00000  25.0%     -    4s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    4s

Cutting planes:
  Clique: 86
  Zero half: 4

Explored 0 nodes (18325 simplex iterations) in 4.75 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%