Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:08:02 2012 Optimize a model with 689 rows, 552 columns and 2505 nonzeros Presolve removed 142 rows and 48 columns Presolve time: 0.02s Presolved: 547 rows, 504 columns, 2089 nonzeros Variable types: 0 continuous, 504 integer (504 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 3.000000e+00, 453 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 25 23.00000 3.00000 87.0% - 0s H 0 0 18.0000000 3.00000 83.3% - 0s H 0 0 3.0000000 3.00000 0.0% - 0s Explored 0 nodes (1352 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%