Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:15 2012 Optimize a model with 490 rows, 44 columns and 980 nonzeros Presolve removed 338 rows and 1 columns Presolve time: 0.01s Presolved: 152 rows, 43 columns, 818 nonzeros Variable types: 0 continuous, 43 integer (43 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 7.979122e+00, 78 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 7.97912 0 40 6.00000 7.97912 33.0% - 0s H 0 0 7.0000000 7.97912 14.0% - 0s Explored 0 nodes (78 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%