Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:09:04 2012

Optimize a model with 17323 rows, 5112 columns and 56727 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.59s
Presolved: 17392 rows, 5110 columns, 61280 nonzeros
Variable types: 0 continuous, 5110 integer (5110 binary)
Found heuristic solution: objective 71.0000000

Root relaxation: objective 2.000000e+00, 3911 iterations, 0.17 seconds

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

     0     0    2.00000    0  142   71.00000    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 2978    5.00000    3.00000  40.0%     -    9s
     0     0    3.00730    0 3477    5.00000    3.00730  39.9%     -   12s
     0     0    3.00730    0 3538    5.00000    3.00730  39.9%     -   14s
     0     0    3.00730    0 3553    5.00000    3.00730  39.9%     -   21s
     0     0    3.00730    0 3551    5.00000    3.00730  39.9%     -   27s
     0     0    3.00730    0 3551    5.00000    3.00730  39.9%     -   34s
     0     2    3.50000    0 3551    5.00000    3.50000  30.0%     -   51s
    12    10    4.00000   10   42    5.00000    4.00000  20.0%  2821   55s
*   13     3              11       4.0000000    4.00000   0.0%  2610   55s

Cutting planes:
  Clique: 46
  Zero half: 3

Explored 14 nodes (137811 simplex iterations) in 55.02 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%