Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:14:19 2012 Optimize a model with 4213 rows, 2450 columns and 14845 nonzeros Presolve removed 739 rows and 100 columns Presolve time: 0.11s Presolved: 3474 rows, 2350 columns, 12841 nonzeros Variable types: 0 continuous, 2350 integer (2350 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 3.000000e+00, 3098 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 22 49.00000 3.00000 93.9% - 1s H 0 0 3.0000000 3.00000 0.0% - 1s Explored 0 nodes (10879 simplex iterations) in 1.10 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%