Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:42:18 2013 Optimize a model with 1112 rows, 26053 columns and 994366 nonzeros Presolve removed 36 rows and 180 columns (presolve time = 5s) ... Presolve removed 36 rows and 180 columns Presolve time: 6.26s Presolved: 1076 rows, 25873 columns, 986486 nonzeros Variable types: 0 continuous, 25873 integer (25873 binary) Found heuristic solution: objective 12697.000000 Root relaxation: objective 8.196167e+03, 4979 iterations, 1.99 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8196.16667 0 52 12697.0000 8196.16667 35.4% - 8s H 0 0 8263.0000000 8196.16667 0.81% - 9s H 0 0 8207.0000000 8196.16667 0.13% - 9s 0 0 8199.50000 0 44 8207.00000 8199.50000 0.09% - 10s * 0 0 0 8200.0000000 8200.00000 0.0% - 13s Explored 0 nodes (9821 simplex iterations) in 13.42 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.200000000000e+03, best bound 8.200000000000e+03, gap 0.0%