Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:59:59 2012

Optimize a model with 339 rows, 253 columns and 1098 nonzeros
Presolve removed 0 rows and 2 columns
Presolve time: 0.00s
Presolved: 339 rows, 251 columns, 1096 nonzeros
Variable types: 0 continuous, 251 integer (250 binary)
Found heuristic solution: objective 68.0000000

Root relaxation: objective 0.000000e+00, 114 iterations, 0.00 seconds

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

     0     0    0.00000    0   81   68.00000    0.00000   100%     -    0s
H    0     0                      60.0000000    0.00000   100%     -    0s
     0     0    0.49415    0   82   60.00000    0.49415  99.2%     -    0s
     0     0    1.02394    0   84   60.00000    1.02394  98.3%     -    0s
     0     0    1.02787    0   85   60.00000    1.02787  98.3%     -    0s
     0     0    1.02787    0   85   60.00000    1.02787  98.3%     -    0s
H    0     0                      58.0000000    1.02787  98.2%     -    0s
H    0     0                      56.0000000    1.02787  98.2%     -    0s
H    0     0                      53.0000000    1.02787  98.1%     -    0s
H    0     0                      52.0000000    1.02787  98.0%     -    0s
     0     2    1.03121    0   85   52.00000    1.03121  98.0%     -    0s
*   41    41              23      37.0000000    3.91138  89.4%  29.3    0s
*   74    53              19      33.0000000    4.71988  85.7%  29.0    0s
H  957   372                      32.0000000   13.69777  57.2%  26.7    1s
*  962   354              29      31.0000000   13.69777  55.8%  26.7    1s

Explored 5626 nodes (124923 simplex iterations) in 4.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%