Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:49:10 2012

Optimize a model with 12461 rows, 3906 columns and 40980 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.34s
Presolved: 12459 rows, 3904 columns, 40578 nonzeros
Variable types: 0 continuous, 3904 integer (3904 binary)
Found heuristic solution: objective 62.0000000

Root relaxation: objective 2.000000e+00, 2932 iterations, 0.10 seconds

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

     0     0    2.00000    0  124   62.00000    2.00000  96.8%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    3.00000    0 2093    5.00000    3.00000  40.0%     -    2s
H    0     0                       4.0000000    3.00000  25.0%     -    3s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    4s

Cutting planes:
  Clique: 55
  Zero half: 1

Explored 0 nodes (16795 simplex iterations) in 4.97 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%