Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:07 2012

Optimize a model with 1398 rows, 74 columns and 2796 nonzeros
Presolve removed 999 rows and 0 columns
Presolve time: 0.04s
Presolved: 399 rows, 74 columns, 2547 nonzeros
Variable types: 0 continuous, 74 integer (74 binary)
Found heuristic solution: objective 6.0000000

Root relaxation: objective 1.146397e+01, 265 iterations, 0.01 seconds

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

     0     0   11.46397    0   65    6.00000   11.46397  91.1%     -    0s
H    0     0                       7.0000000   11.46397  63.8%     -    0s
     0     0   10.95212    0   69    7.00000   10.95212  56.5%     -    0s
     0     0   10.92015    0   71    7.00000   10.92015  56.0%     -    0s
     0     0   10.88750    0   73    7.00000   10.88750  55.5%     -    0s
     0     0   10.87804    0   73    7.00000   10.87804  55.4%     -    0s
     0     0   10.86709    0   72    7.00000   10.86709  55.2%     -    0s
     0     0   10.84469    0   73    7.00000   10.84469  54.9%     -    0s
     0     0   10.83918    0   73    7.00000   10.83918  54.8%     -    0s
     0     0   10.83501    0   73    7.00000   10.83501  54.8%     -    0s
     0     0   10.81921    0   72    7.00000   10.81921  54.6%     -    0s
     0     0   10.81863    0   71    7.00000   10.81863  54.6%     -    0s
     0     2   10.81840    0   71    7.00000   10.81840  54.5%     -    0s
*   55    18               7       8.0000000   10.36871  29.6%  40.1    0s

Cutting planes:
  Clique: 48
  Zero half: 3

Explored 76 nodes (3374 simplex iterations) in 0.49 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%