Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:19:22 2012

Optimize a model with 19490 rows, 5402 columns and 63508 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.69s
Presolved: 19488 rows, 5400 columns, 62974 nonzeros
Variable types: 0 continuous, 5400 integer (5400 binary)
Found heuristic solution: objective 73.0000000

Root relaxation: objective 2.000000e+00, 3639 iterations, 0.13 seconds

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

     0     0    2.00000    0  146   73.00000    2.00000  97.3%     -    1s
H    0     0                      66.0000000    2.00000  97.0%     -    1s
H    0     0                       5.0000000    2.00000  60.0%     -    1s
     0     0    3.00000    0 2240    5.00000    3.00000  40.0%     -    9s
     0     0    3.00000    0 2264    5.00000    3.00000  40.0%     -   11s
     0     0    3.00000    0 1983    5.00000    3.00000  40.0%     -   20s
     0     0    3.00000    0 2141    5.00000    3.00000  40.0%     -   27s
     0     0    3.00000    0 2301    5.00000    3.00000  40.0%     -   34s
     0     0    3.00000    0 2301    5.00000    3.00000  40.0%     -   42s
     0     0    3.00000    0 2301    5.00000    3.00000  40.0%     -   50s
     0     2    3.00000    0 2301    5.00000    3.00000  40.0%     -   67s
     5     5    3.66667    3  824    5.00000    3.00000  40.0%  6460   70s
H   27     4                       4.0000000    3.00000  25.0%  1260   73s

Cutting planes:
  Clique: 38
  Zero half: 3

Explored 28 nodes (184983 simplex iterations) in 81.67 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%