Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:16:41 2012 Optimize a model with 4199 rows, 3192 columns and 15510 nonzeros Presolve removed 232 rows and 338 columns Presolve time: 0.09s Presolved: 3967 rows, 2854 columns, 14472 nonzeros Variable types: 0 continuous, 2854 integer (2854 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 3.000000e+00, 2763 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 70 56.00000 3.00000 94.6% - 0s H 0 0 3.0000000 3.00000 0.0% - 0s Explored 0 nodes (11905 simplex iterations) in 0.81 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%