Gurobi 5.0.1 (linux64) logging started Fri Nov 16 16:49:04 2012 Optimize a model with 13746 rows, 6320 columns and 47242 nonzeros Presolve removed 1975 rows and 0 columns Presolve time: 0.29s Presolved: 11771 rows, 6320 columns, 42502 nonzeros Variable types: 0 continuous, 6320 integer (6320 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 3.000000e+00, 10606 iterations, 2.09 seconds Total elapsed time = 6.17s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 96 42.00000 3.00000 92.9% - 7s H 0 0 4.0000000 3.00000 25.0% - 7s H 0 0 3.0000000 3.00000 0.0% - 7s Explored 0 nodes (38680 simplex iterations) in 7.66 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%