Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:41:06 2012 Optimize a model with 4094 rows, 2070 columns and 14128 nonzeros Presolve removed 1082 rows and 2 columns Presolve time: 0.11s Presolved: 3057 rows, 2068 columns, 13409 nonzeros Variable types: 0 continuous, 2068 integer (2068 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 3.000000e+00, 2779 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 68 45.00000 3.00000 93.3% - 1s H 0 0 3.0000000 3.00000 0.0% - 1s Explored 0 nodes (13296 simplex iterations) in 1.33 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%