Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:47:11 2013 Optimize a model with 280 rows, 2100 columns and 11250 nonzeros Presolve removed 10 rows and 10 columns Presolve time: 0.01s Presolved: 270 rows, 2090 columns, 10240 nonzeros Variable types: 2020 continuous, 70 integer (70 binary) Root relaxation: objective 1.791602e+04, 162 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17916.0191 0 9 - 17916.0191 - - 0s 0 0 17917.0911 0 12 - 17917.0911 - - 0s 0 0 17917.3357 0 12 - 17917.3357 - - 0s 0 0 17917.7008 0 12 - 17917.7008 - - 0s 0 0 17917.7008 0 12 - 17917.7008 - - 0s 0 0 17920.4637 0 7 - 17920.4637 - - 0s 0 0 17920.4637 0 7 - 17920.4637 - - 0s H 0 0 18400.120710 17920.4637 2.61% - 0s 0 2 17962.3633 0 7 18400.1207 17962.3633 2.38% - 0s * 13 10 13 17984.568443 17962.3633 0.12% 7.6 0s * 25 10 7 17984.442457 17969.5578 0.08% 5.1 0s Cutting planes: Gomory: 2 Flow cover: 3 Explored 31 nodes (485 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.798444245737e+04, best bound 1.798326736966e+04, gap 0.0065%