Gurobi 5.0.1 (linux64) logging started Sat Nov 17 06:23:20 2012

Optimize a model with 67389 rows, 53130 columns and 254148 nonzeros
Presolve removed 0 rows and 0 columns (presolve time = 5s) ...
Presolve removed 2 rows and 2 columns
Presolve time: 5.04s
Presolved: 67617 rows, 53128 columns, 306462 nonzeros
Variable types: 0 continuous, 53128 integer (53128 binary)
Found heuristic solution: objective 230.0000000

Root relaxation: objective 2.000000e+00, 36197 iterations, 3.99 seconds
Total elapsed time = 14.11s

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

     0     0    2.00000    0  428  230.00000    2.00000  99.1%     -   15s
H    0     0                     223.0000000    2.00000  99.1%     -   15s
H    0     0                       4.0000000    2.00000  50.0%     -   15s
     0     0    2.66667    0 4133    4.00000    2.66667  33.3%     -   40s
     0     0    2.66667    0 16171    4.00000    2.66667  33.3%     -   63s
     0     0    2.66667    0 2827    4.00000    2.66667  33.3%     -  256s
     0     0    2.66667    0 14611    4.00000    2.66667  33.3%     -  300s

Cutting planes:
  Clique: 2
  Zero half: 79

Explored 0 nodes (361886 simplex iterations) in 300.03 seconds
Thread count was 1 (of 16 available processors)

Time limit reached
Best objective 4.000000000000e+00, best bound 3.000000000000e+00, gap 25.0000%