Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:08:58 2012

Optimize a model with 6712 rows, 2450 columns and 22342 nonzeros
Presolve removed 3 rows and 51 columns
Presolve time: 0.11s
Presolved: 6709 rows, 2399 columns, 22019 nonzeros
Variable types: 0 continuous, 2399 integer (2399 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 2.000000e+00, 1683 iterations, 0.04 seconds

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

     0     0    2.00000    0   96   49.00000    2.00000  95.9%     -    0s
H    0     0                      45.0000000    2.00000  95.6%     -    0s
H    0     0                       6.0000000    2.00000  66.7%     -    0s
     0     0    3.00000    0  949    6.00000    3.00000  50.0%     -    0s
     0     0    3.00000    0 1615    6.00000    3.00000  50.0%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0  120    4.00000    3.00000  25.0%     -    3s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    4s

Cutting planes:
  Clique: 49
  Zero half: 36

Explored 0 nodes (26799 simplex iterations) in 4.24 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%