Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:53:04 2012

Optimize a model with 8119 rows, 3192 columns and 27270 nonzeros
Presolve removed 65 rows and 58 columns
Presolve time: 0.18s
Presolved: 8054 rows, 3134 columns, 26811 nonzeros
Variable types: 0 continuous, 3134 integer (3134 binary)
Found heuristic solution: objective 56.0000000

Root relaxation: objective 2.333333e+00, 5943 iterations, 0.69 seconds
Total elapsed time = 5.35s

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

     0     0    2.33333    0  334   56.00000    2.33333  95.8%     -    5s
H    0     0                      49.0000000    2.33333  95.2%     -    5s
H    0     0                       6.0000000    2.33333  61.1%     -    5s
     0     0    2.96429    0 1554    6.00000    2.96429  50.6%     -    6s
H    0     0                       4.0000000    2.96429  25.9%     -    6s
     0     0    2.96429    0 1577    4.00000    2.96429  25.9%     -    7s
     0     0    2.96429    0 1159    4.00000    2.96429  25.9%     -   10s
     0     0    2.96429    0 1364    4.00000    2.96429  25.9%     -   13s
     0     0    2.96429    0 1384    4.00000    2.96429  25.9%     -   17s
     0     0    2.96429    0 1395    4.00000    2.96429  25.9%     -   19s
     0     0    2.96429    0 1395    4.00000    2.96429  25.9%     -   22s
     0     1    3.00000    0 1395    4.00000    3.00000  25.0%     -   27s

Cutting planes:
  Gomory: 1
  Clique: 14
  Zero half: 20

Explored 22 nodes (131654 simplex iterations) in 28.96 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%