Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:44 2013 Optimize a model with 2140 rows, 3020 columns and 10010 nonzeros Presolve removed 30 rows and 20 columns Presolve time: 0.11s Presolved: 2110 rows, 3000 columns, 7980 nonzeros Variable types: 2010 continuous, 990 integer (990 binary) Root relaxation: objective 2.337984e+04, 816 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 23379.8401 0 1 - 23379.8401 - - 0s 0 0 23518.8420 0 4 - 23518.8420 - - 0s H 0 0 23558.766220 23518.8420 0.17% - 0s 0 0 23526.0872 0 3 23558.7662 23526.0872 0.14% - 0s 0 0 23526.0872 0 1 23558.7662 23526.0872 0.14% - 0s 0 0 23526.0872 0 4 23558.7662 23526.0872 0.14% - 0s H 0 0 23530.700530 23526.0872 0.02% - 0s 0 0 23526.0872 0 3 23530.7005 23526.0872 0.02% - 0s 0 0 23526.0945 0 3 23530.7005 23526.0945 0.02% - 0s 0 0 23526.1018 0 3 23530.7005 23526.1018 0.02% - 0s 0 0 23526.1093 0 3 23530.7005 23526.1093 0.02% - 0s 0 0 23526.1168 0 3 23530.7005 23526.1168 0.02% - 0s 0 0 23526.1244 0 3 23530.7005 23526.1244 0.02% - 0s 0 0 23526.1321 0 3 23530.7005 23526.1321 0.02% - 0s 0 0 23526.1399 0 3 23530.7005 23526.1399 0.02% - 0s 0 0 23526.1478 0 3 23530.7005 23526.1478 0.02% - 0s 0 0 23526.1557 0 3 23530.7005 23526.1557 0.02% - 0s 0 0 23526.1638 0 3 23530.7005 23526.1638 0.02% - 0s 0 0 23526.1719 0 3 23530.7005 23526.1719 0.02% - 0s 0 0 23526.1801 0 3 23530.7005 23526.1801 0.02% - 0s 0 0 23526.1885 0 3 23530.7005 23526.1885 0.02% - 0s 0 0 23526.1969 0 3 23530.7005 23526.1969 0.02% - 0s 0 2 23526.3727 0 3 23530.7005 23526.3727 0.02% - 0s * 3 2 3 23527.305205 23527.3052 0.0% 3.0 0s Cutting planes: Gomory: 1 Flow cover: 3 Explored 4 nodes (1240 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.352730520463e+04, best bound 2.352730520463e+04, gap 0.0%