Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:01:12 2013 Optimize a model with 4525 rows, 900 columns and 13950 nonzeros Presolve removed 689 rows and 456 columns Presolve time: 0.02s Presolved: 3836 rows, 444 columns, 11994 nonzeros Variable types: 18 continuous, 426 integer (426 binary) Found heuristic solution: objective 17701.000000 Root relaxation: objective 1.345222e+04, 3199 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13452.2222 0 8 17701.0000 13452.2222 24.0% - 0s H 0 0 13470.000000 13452.2222 0.13% - 0s H 0 0 13459.000000 13452.2222 0.05% - 0s 0 0 13454.0481 0 16 13459.0000 13454.0481 0.04% - 0s 0 0 13454.0481 0 6 13459.0000 13454.0481 0.04% - 0s 0 0 13454.4322 0 21 13459.0000 13454.4322 0.03% - 0s 0 0 13455.7117 0 18 13459.0000 13455.7117 0.02% - 0s H 0 0 13457.000000 13455.7117 0.01% - 0s Cutting planes: Implied bound: 1 MIR: 10 Explored 0 nodes (3352 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.345700000000e+04, best bound 1.345600000000e+04, gap 0.0074%