Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:49 2013 Optimize a model with 21712 rows, 21252 columns and 84732 nonzeros Presolve removed 46 rows and 0 columns Presolve time: 0.09s Presolved: 21666 rows, 21252 columns, 84686 nonzeros Variable types: 21206 continuous, 46 integer (46 binary) Root relaxation: objective 4.730005e+04, 3708 iterations, 1.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47300.0510 0 37 - 47300.0510 - - 1s H 0 0 61126.000000 47300.0510 22.6% - 1s 0 0 56229.6788 0 5 61126.0000 56229.6788 8.01% - 2s H 0 0 58554.940512 56229.6788 3.97% - 2s H 0 0 58103.000000 56229.6788 3.22% - 2s 0 0 56526.3095 0 3 58103.0000 56526.3095 2.71% - 2s H 0 0 57947.000000 56526.3095 2.45% - 2s H 0 0 57893.000000 56526.3095 2.36% - 2s 0 0 56638.6436 0 2 57893.0000 56638.6436 2.17% - 2s H 0 0 56877.357143 56638.6436 0.42% - 2s H 0 0 56648.000000 56638.6436 0.02% - 2s Cutting planes: Implied bound: 41 Explored 0 nodes (5871 simplex iterations) in 2.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.664800000000e+04, best bound 5.664800000000e+04, gap 0.0%