Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:54:37 2012 Optimize a model with 5545 rows, 2256 columns and 18657 nonzeros Presolve removed 1695 rows and 49 columns Presolve time: 0.12s Presolved: 3850 rows, 2207 columns, 14545 nonzeros Variable types: 0 continuous, 2207 integer (2207 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 4.000000e+00, 3667 iterations, 0.33 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4.00000 0 45 47.00000 4.00000 91.5% - 0s H 0 0 5.0000000 4.00000 20.0% - 0s H 0 0 4.0000000 4.00000 0.0% - 0s Explored 0 nodes (9634 simplex iterations) in 0.97 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%