Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:50:54 2012

Optimize a model with 18979 rows, 21462 columns and 77670 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.35s
Presolved: 19123 rows, 21460 columns, 98726 nonzeros
Variable types: 0 continuous, 21460 integer (21460 binary)
Found heuristic solution: objective 146.0000000

Root relaxation: objective 2.000000e+00, 12439 iterations, 0.55 seconds

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

     0     0    2.00000    0  216  146.00000    2.00000  98.6%     -    2s
H    0     0                     121.0000000    2.00000  98.3%     -    2s
H    0     0                       3.0000000    2.00000  33.3%     -    2s

Cutting planes:
  Zero half: 2

Explored 0 nodes (40384 simplex iterations) in 2.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+00, best bound 2.000000000000e+00, gap 33.3333%