Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:21 2013 Optimize a model with 19844 rows, 19404 columns and 77484 nonzeros Presolve removed 1781 rows and 0 columns Presolve time: 0.11s Presolved: 18063 rows, 19404 columns, 73922 nonzeros Variable types: 19360 continuous, 44 integer (44 binary) Root relaxation: objective 4.500212e+04, 2477 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 45002.1212 0 1 - 45002.1212 - - 0s H 0 0 45096.000000 45002.1212 0.21% - 0s 0 0 45006.5566 0 2 45096.0000 45006.5566 0.20% - 0s 0 0 45025.8741 0 3 45096.0000 45025.8741 0.16% - 0s 0 0 45094.1818 0 1 45096.0000 45094.1818 0.00% - 0s Cutting planes: Gomory: 1 Explored 0 nodes (2688 simplex iterations) in 0.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.509600000000e+04, best bound 4.509418181818e+04, gap 0.0040%