Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:25 2012

Optimize a model with 844 rows, 57 columns and 1688 nonzeros
Presolve removed 603 rows and 0 columns
Presolve time: 0.01s
Presolved: 241 rows, 57 columns, 1499 nonzeros
Variable types: 0 continuous, 57 integer (57 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 9.522510e+00, 116 iterations, 0.00 seconds

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

     0     0    9.52251    0   50    7.00000    9.52251  36.0%     -    0s
     0     0    9.02694    0   53    7.00000    9.02694  29.0%     -    0s
     0     0    8.95188    0   50    7.00000    8.95188  27.9%     -    0s
     0     0    8.93363    0   52    7.00000    8.93363  27.6%     -    0s
     0     0    8.92523    0   53    7.00000    8.92523  27.5%     -    0s
     0     0    8.91770    0   51    7.00000    8.91770  27.4%     -    0s
     0     0    8.91602    0   53    7.00000    8.91602  27.4%     -    0s
     0     0    8.90611    0   53    7.00000    8.90611  27.2%     -    0s
     0     0    8.90350    0   53    7.00000    8.90350  27.2%     -    0s
     0     0    8.90161    0   53    7.00000    8.90161  27.2%     -    0s
     0     2    8.89757    0   53    7.00000    8.89757  27.1%     -    0s

Cutting planes:
  Clique: 27
  Zero half: 4

Explored 12 nodes (680 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%