Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:53:49 2013 Optimize a model with 9330 rows, 9030 columns and 36030 nonzeros Presolve removed 1637 rows and 0 columns Presolve time: 0.05s Presolved: 7693 rows, 9030 columns, 32756 nonzeros Variable types: 9000 continuous, 30 integer (30 binary) Root relaxation: objective 2.873009e+04, 1126 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28730.0909 0 1 - 28730.0909 - - 0s H 0 0 28773.000000 28730.0909 0.15% - 0s 0 0 28730.8493 0 2 28773.0000 28730.8493 0.15% - 0s 0 0 28730.8493 0 2 28773.0000 28730.8493 0.15% - 0s 0 0 28767.6667 0 1 28773.0000 28767.6667 0.02% - 0s H 0 0 28770.000000 28767.6667 0.01% - 0s Explored 0 nodes (1163 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.877000000000e+04, best bound 2.876766666667e+04, gap 0.0081%