Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:50:37 2012 Optimize a model with 4185 rows, 2162 columns and 14488 nonzeros Presolve removed 1060 rows and 2 columns Presolve time: 0.11s Presolved: 3171 rows, 2160 columns, 13938 nonzeros Variable types: 0 continuous, 2160 integer (2160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 3.000000e+00, 2934 iterations, 0.24 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 97 46.00000 3.00000 93.5% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s H 0 0 3.0000000 3.00000 0.0% - 0s Explored 0 nodes (7981 simplex iterations) in 0.91 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%