Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:11 2013 Optimize a model with 18963 rows, 18533 columns and 74003 nonzeros Presolve removed 906 rows and 0 columns Presolve time: 0.11s Presolved: 18057 rows, 18533 columns, 72191 nonzeros Variable types: 18490 continuous, 43 integer (43 binary) Root relaxation: objective 4.590584e+04, 2657 iterations, 0.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 45905.8429 0 2 - 45905.8429 - - 0s H 0 0 46020.000000 45905.8429 0.25% - 0s 0 0 45910.6607 0 3 46020.0000 45910.6607 0.24% - 0s 0 0 45983.3290 0 2 46020.0000 45983.3290 0.08% - 0s Cutting planes: Gomory: 1 Flow cover: 2 Explored 0 nodes (2756 simplex iterations) in 0.62 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.602000000000e+04, best bound 4.602000000000e+04, gap 0.0%