Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:52:25 2013 Optimize a model with 10700 rows, 1600 columns and 32800 nonzeros Presolve removed 1677 rows and 827 columns Presolve time: 0.08s Presolved: 9023 rows, 773 columns, 27732 nonzeros Variable types: 18 continuous, 755 integer (755 binary) Found heuristic solution: objective 30072.000000 Root relaxation: objective 2.243027e+04, 3075 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 22430.2667 0 8 30072.0000 22430.2667 25.4% - 0s H 0 0 22450.000000 22430.2667 0.09% - 0s H 0 0 22443.000000 22430.2667 0.06% - 0s H 0 0 22436.000000 22430.2667 0.03% - 0s 0 0 22431.4854 0 17 22436.0000 22431.4854 0.02% - 0s 0 0 22431.4854 0 7 22436.0000 22431.4854 0.02% - 0s 0 0 22431.4854 0 16 22436.0000 22431.4854 0.02% - 0s 0 0 22433.5296 0 17 22436.0000 22433.5296 0.01% - 0s 0 1 22433.6459 0 17 22436.0000 22433.6459 0.01% - 0s Explored 3 nodes (3246 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.243600000000e+04, best bound 2.243600000000e+04, gap 0.0%