Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:37:28 2012

Optimize a model with 18071 rows, 5256 columns and 59110 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.65s
Presolved: 18069 rows, 5254 columns, 58608 nonzeros
Variable types: 0 continuous, 5254 integer (5254 binary)
Found heuristic solution: objective 72.0000000

Root relaxation: objective 2.000000e+00, 3981 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  144   72.00000    2.00000  97.2%     -    1s
H    0     0                      70.0000000    2.00000  97.1%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 2688    5.00000    3.00000  40.0%     -   11s
     0     0    3.00000    0 2695    5.00000    3.00000  40.0%     -   13s
     0     0    3.00000    0 2864    5.00000    3.00000  40.0%     -   21s
     0     0    3.00000    0 2859    5.00000    3.00000  40.0%     -   28s
     0     0    3.00000    0 2595    5.00000    3.00000  40.0%     -   34s
     0     0    3.00000    0 2596    5.00000    3.00000  40.0%     -   40s
     0     0    3.00000    0 2601    5.00000    3.00000  40.0%     -   45s
     0     0    3.00000    0 2601    5.00000    3.00000  40.0%     -   51s
H    0     0                       4.0000000    3.00000  25.0%     -   66s
     0     2    3.00000    0  284    4.00000    3.00000  25.0%     -   66s

Cutting planes:
  Gomory: 1
  Clique: 27
  Zero half: 5

Explored 1 nodes (219086 simplex iterations) in 72.60 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%