Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:48:54 2012

Optimize a model with 11580 rows, 3660 columns and 38160 nonzeros
Presolve time: 0.10s
Presolved: 11580 rows, 3660 columns, 38479 nonzeros
Variable types: 0 continuous, 3660 integer (3660 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 2.000000e+00, 5627 iterations, 0.63 seconds

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

     0     0    2.00000    0  120   43.00000    2.00000  95.3%     -    2s
H    0     0                      14.0000000    2.00000  85.7%     -    2s
H    0     0                       5.0000000    2.00000  60.0%     -    2s
     0     0    2.00000    0  120    5.00000    2.00000  60.0%     -    3s
     0     0    2.00000    0  120    5.00000    2.00000  60.0%     -    7s
     0     0    2.00000    0  120    5.00000    2.00000  60.0%     -   11s
     0     0    2.00000    0  120    5.00000    2.00000  60.0%     -   17s
     0     0    2.00000    0  120    5.00000    2.00000  60.0%     -   23s
     0     0    2.00000    0  120    5.00000    2.00000  60.0%     -   26s
     0     2    2.00000    0  120    5.00000    2.00000  60.0%     -   39s
     1     3    3.00000    1  709    5.00000    2.00000  60.0% 38492   49s
     2     4    3.00000    1  520    5.00000    3.00000  40.0% 21887   51s
*   23     6              20       4.0000000    3.00000  25.0%  2186   53s
    30     3     cutoff    4         4.00000    3.00000  25.0%  1997   55s
    47     4    3.00000    2  601    4.00000    3.00000  25.0%  1677   60s
    55     4    3.00000    5  118    4.00000    3.00000  25.0%  1685   65s
    60     1     cutoff    6         4.00000    3.00000  25.0%  1921   70s

Cutting planes:
  Clique: 99

Explored 72 nodes (205127 simplex iterations) in 74.86 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%