Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:55 2013 Optimize a model with 4641 rows, 4431 columns and 17661 nonzeros Presolve removed 758 rows and 0 columns Presolve time: 0.02s Presolved: 3883 rows, 4431 columns, 16145 nonzeros Variable types: 4410 continuous, 21 integer (21 binary) Root relaxation: objective 3.098283e+04, 855 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 30982.8286 0 1 - 30982.8286 - - 0s H 0 0 31033.000000 30982.8286 0.16% - 0s 0 0 30983.5238 0 1 31033.0000 30983.5238 0.16% - 0s 0 0 30985.1935 0 1 31033.0000 30985.1935 0.15% - 0s 0 0 30995.6000 0 1 31033.0000 30995.6000 0.12% - 0s 0 0 30998.3333 0 1 31033.0000 30998.3333 0.11% - 0s 0 0 30998.3333 0 1 31033.0000 30998.3333 0.11% - 0s 0 2 31031.0000 0 1 31033.0000 31031.0000 0.01% - 0s Explored 1 nodes (1088 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.103300000000e+04, best bound 3.103100000000e+04, gap 0.0064%