Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:06:53 2013 Optimize a model with 8473 rows, 1369 columns and 26011 nonzeros Presolve removed 1755 rows and 724 columns Presolve time: 0.06s Presolved: 6718 rows, 645 columns, 20527 nonzeros Variable types: 11 continuous, 634 integer (634 binary) Found heuristic solution: objective 25091.000000 Root relaxation: objective 1.983239e+04, 1829 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19832.3875 0 8 25091.0000 19832.3875 21.0% - 0s H 0 0 19850.000000 19832.3875 0.09% - 0s H 0 0 19840.000000 19832.3875 0.04% - 0s 0 0 19834.2585 0 20 19840.0000 19834.2585 0.03% - 0s 0 0 19834.2585 0 9 19840.0000 19834.2585 0.03% - 0s 0 0 19834.2617 0 19 19840.0000 19834.2617 0.03% - 0s 0 1 19834.3859 0 19 19840.0000 19834.3859 0.03% - 0s H 3 3 19838.000000 19834.3859 0.02% 0.0 0s Cutting planes: Gomory: 4 Cover: 1 Implied bound: 1 MIR: 7 Zero half: 1 Explored 4 nodes (1971 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.983800000000e+04, best bound 1.983700000000e+04, gap 0.0050%