Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:52:00 2013

Optimize a model with 4662 rows, 4452 columns and 17682 nonzeros
Presolve removed 21 rows and 0 columns
Presolve time: 0.02s
Presolved: 4641 rows, 4452 columns, 17661 nonzeros
Variable types: 4431 continuous, 21 integer (21 binary)

Root relaxation: objective 2.955024e+04, 1090 iterations, 0.06 seconds

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

     0     0 29550.2402    0   17          - 29550.2402     -      -    0s
H    0     0                    31505.000000 29550.2402  6.20%     -    0s
     0     0 30982.8286    0    1 31505.0000 30982.8286  1.66%     -    0s
H    0     0                    31460.771429 30982.8286  1.52%     -    0s
H    0     0                    31033.000000 30982.8286  0.16%     -    0s
     0     0 30983.0546    0    3 31033.0000 30983.0546  0.16%     -    0s
     0     0 30985.1935    0    1 31033.0000 30985.1935  0.15%     -    0s
     0     0 30998.3333    0    1 31033.0000 30998.3333  0.11%     -    0s
     0     0 30998.3333    0    1 31033.0000 30998.3333  0.11%     -    0s
H    0     0                    31031.000000 30998.3333  0.11%     -    0s
     0     0     cutoff    0      31031.0000 31031.0000   0.0%     -    0s

Explored 0 nodes (2169 simplex iterations) in 0.35 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.103100000000e+04, best bound 3.103100000000e+04, gap 0.0%