Gurobi 5.0.1 (linux64) logging started Fri Nov 16 14:46:43 2012

Optimize a model with 22495 rows, 5852 columns and 72958 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.79s
Presolved: 22493 rows, 5850 columns, 72366 nonzeros
Variable types: 0 continuous, 5850 integer (5850 binary)
Found heuristic solution: objective 76.0000000

Root relaxation: objective 2.000000e+00, 3864 iterations, 0.16 seconds

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

     0     0    2.00000    0  152   76.00000    2.00000  97.4%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 2666    5.00000    3.00000  40.0%     -   16s
H    0     0                       4.0000000    3.00000  25.0%     -   18s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -   20s

Cutting planes:
  Clique: 189
  Zero half: 5

Explored 0 nodes (45715 simplex iterations) in 20.32 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%