Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:31:59 2012

Optimize a model with 90 rows, 58 columns and 180 nonzeros
Presolve removed 57 rows and 35 columns
Presolve time: 0.00s
Presolved: 33 rows, 23 columns, 67 nonzeros
Variable types: 0 continuous, 23 integer (23 binary)
Found heuristic solution: objective 29.0000000

Root relaxation: objective 3.000000e+01, 29 iterations, 0.00 seconds

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

     0     0   30.00000    0   22   29.00000   30.00000  3.45%     -    0s
     0     0 infeasible    0        29.00000   29.99997  3.45%     -    0s

Explored 0 nodes (44 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%