Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:16 2012 Optimize a model with 544 rows, 47 columns and 1088 nonzeros Presolve removed 389 rows and 0 columns Presolve time: 0.01s Presolved: 155 rows, 47 columns, 845 nonzeros Variable types: 0 continuous, 47 integer (47 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 8.700071e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8.70007 0 41 6.00000 8.70007 45.0% - 0s H 0 0 7.0000000 8.70007 24.3% - 0s H 0 0 8.0000000 8.70007 8.75% - 0s Explored 0 nodes (83 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%