Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:53:52 2013 Optimize a model with 330 rows, 9030 columns and 18030 nonzeros Presolve time: 0.01s Presolved: 330 rows, 9030 columns, 18030 nonzeros Variable types: 9000 continuous, 30 integer (30 binary) Root relaxation: objective 2.854705e+04, 368 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28547.0527 0 6 - 28547.0527 - - 0s H 0 0 28934.000000 28547.0527 1.34% - 0s H 0 0 28887.000000 28547.0527 1.18% - 0s 0 0 28716.9624 0 2 28887.0000 28716.9624 0.59% - 0s 0 0 28723.8065 0 2 28887.0000 28723.8065 0.56% - 0s 0 0 28725.5603 0 2 28887.0000 28725.5603 0.56% - 0s 0 0 28729.9144 0 2 28887.0000 28729.9144 0.54% - 0s 0 0 28730.0909 0 1 28887.0000 28730.0909 0.54% - 0s H 0 0 28770.000000 28730.0909 0.14% - 0s 0 0 28730.0909 0 6 28770.0000 28730.0909 0.14% - 0s 0 0 28730.0909 0 2 28770.0000 28730.0909 0.14% - 0s 0 0 28730.0909 0 1 28770.0000 28730.0909 0.14% - 0s 0 0 28730.0909 0 1 28770.0000 28730.0909 0.14% - 0s 0 2 28751.0000 0 1 28770.0000 28751.0000 0.07% - 0s Cutting planes: Implied bound: 33 Flow cover: 1 Explored 2 nodes (893 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.877000000000e+04, best bound 2.876849325932e+04, gap 0.0052%