Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:30:00 2012 Optimize a model with 4385 rows, 1892 columns and 14833 nonzeros Presolve removed 1249 rows and 2 columns Presolve time: 0.11s Presolved: 3179 rows, 1890 columns, 13612 nonzeros Variable types: 0 continuous, 1890 integer (1890 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 4.000000e+00, 2536 iterations, 0.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4.00000 0 113 43.00000 4.00000 90.7% - 0s H 0 0 4.0000000 4.00000 0.0% - 0s Explored 0 nodes (9371 simplex iterations) in 0.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%