Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:43:40 2013 Optimize a model with 3303 rows, 729 columns and 10206 nonzeros Presolve removed 586 rows and 375 columns Presolve time: 0.02s Presolved: 2717 rows, 354 columns, 8439 nonzeros Variable types: 12 continuous, 342 integer (342 binary) Found heuristic solution: objective 16413.000000 Found heuristic solution: objective 15323.000000 Root relaxation: objective 1.195462e+04, 1806 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11954.6250 0 9 15323.0000 11954.6250 22.0% - 0s H 0 0 11965.000000 11954.6250 0.09% - 0s 0 0 11955.0000 0 14 11965.0000 11955.0000 0.08% - 0s 0 0 11955.0000 0 11 11965.0000 11955.0000 0.08% - 0s 0 0 11955.0000 0 21 11965.0000 11955.0000 0.08% - 0s 0 0 11955.2364 0 23 11965.0000 11955.2364 0.08% - 0s 0 2 11955.3293 0 23 11965.0000 11955.3293 0.08% - 0s H 1 2 11961.000000 11955.3293 0.05% 0.0 0s * 91 0 27 11960.000000 11960.0000 0.0% 8.7 0s Cutting planes: Gomory: 6 Cover: 12 Implied bound: 2 MIR: 20 Zero half: 7 Explored 92 nodes (2976 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.196000000000e+04, best bound 1.196000000000e+04, gap 0.0%