Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:21:20 2013 Optimize a model with 1561 rows, 441 columns and 4851 nonzeros Presolve removed 427 rows and 230 columns Presolve time: 0.01s Presolved: 1134 rows, 211 columns, 3633 nonzeros Variable types: 13 continuous, 198 integer (198 binary) Found heuristic solution: objective 7874.0000000 Root relaxation: objective 5.413909e+03, 1219 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5413.90909 0 6 7874.00000 5413.90909 31.2% - 0s H 0 0 5438.0000000 5413.90909 0.44% - 0s H 0 0 5422.0000000 5413.90909 0.15% - 0s 0 0 5414.92188 0 14 5422.00000 5414.92188 0.13% - 0s 0 0 5414.92188 0 5 5422.00000 5414.92188 0.13% - 0s 0 0 5415.28484 0 16 5422.00000 5415.28484 0.12% - 0s 0 0 5415.85735 0 19 5422.00000 5415.85735 0.11% - 0s 0 0 5416.75820 0 19 5422.00000 5416.75820 0.10% - 0s 0 0 5417.37312 0 20 5422.00000 5417.37312 0.09% - 0s 0 0 5417.71897 0 18 5422.00000 5417.71897 0.08% - 0s 0 0 5417.99828 0 16 5422.00000 5417.99828 0.07% - 0s H 0 0 5418.0000000 5417.99828 0.00% - 0s Cutting planes: Cover: 1 MIR: 8 Explored 0 nodes (1429 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.418000000000e+03, best bound 5.418000000000e+03, gap 0.0%