Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:04:56 2013 Optimize a model with 756 rows, 7764 columns and 423017 nonzeros Presolve removed 18 rows and 18 columns (presolve time = 5s) ... Presolve removed 20 rows and 20 columns Presolve time: 6.10s Presolved: 736 rows, 7744 columns, 421317 nonzeros Variable types: 0 continuous, 7744 integer (7744 binary) Found heuristic solution: objective 5974.0000000 Found heuristic solution: objective 4181.0000000 Root relaxation: objective 3.424000e+03, 1528 iterations, 0.27 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 3424.0000000 3424.00000 0.0% - 6s Explored 0 nodes (1528 simplex iterations) in 6.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.424000000000e+03, best bound 3.424000000000e+03, gap 0.0%