Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:33:55 2012 Optimize a model with 4707 rows, 1980 columns and 15882 nonzeros Presolve removed 1058 rows and 2 columns Presolve time: 0.11s Presolved: 3649 rows, 1978 columns, 13208 nonzeros Variable types: 0 continuous, 1978 integer (1978 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 4.000000e+00, 2317 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 4.0000000 4.00000 0.0% - 0s Explored 0 nodes (3859 simplex iterations) in 0.37 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%