Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:06:51 2013 Optimize a model with 8473 rows, 1369 columns and 26011 nonzeros Presolve removed 1230 rows and 702 columns Presolve time: 0.05s Presolved: 7243 rows, 667 columns, 22306 nonzeros Variable types: 17 continuous, 650 integer (650 binary) Found heuristic solution: objective 30146.000000 Root relaxation: objective 2.194356e+04, 3007 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 21943.5556 0 5 30146.0000 21943.5556 27.2% - 0s H 0 0 21961.000000 21943.5556 0.08% - 0s H 0 0 21953.000000 21943.5556 0.04% - 0s 0 0 21945.6447 0 15 21953.0000 21945.6447 0.03% - 0s 0 0 21945.6447 0 4 21953.0000 21945.6447 0.03% - 0s H 0 0 21952.000000 21945.6447 0.03% - 0s 0 0 21945.9372 0 18 21952.0000 21945.9372 0.03% - 0s 0 0 21946.4254 0 19 21952.0000 21946.4254 0.03% - 0s 0 0 21946.7314 0 20 21952.0000 21946.7314 0.02% - 0s 0 2 21947.0052 0 20 21952.0000 21947.0052 0.02% - 0s H 1 2 21949.000000 21947.0052 0.01% 0.0 0s Explored 2 nodes (3185 simplex iterations) in 0.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.194900000000e+04, best bound 2.194800000000e+04, gap 0.0046%