Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:06:47 2013 Optimize a model with 8473 rows, 1369 columns and 26011 nonzeros Presolve removed 1485 rows and 713 columns Presolve time: 0.06s Presolved: 6988 rows, 656 columns, 21439 nonzeros Variable types: 14 continuous, 642 integer (642 binary) Found heuristic solution: objective 36270.000000 Root relaxation: objective 2.982109e+04, 1715 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 29821.0879 0 4 36270.0000 29821.0879 17.8% - 0s H 0 0 29827.000000 29821.0879 0.02% - 0s H 0 0 29822.000000 29821.0879 0.00% - 0s Explored 0 nodes (1716 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.982200000000e+04, best bound 2.982200000000e+04, gap 0.0%