Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:17 2012 Optimize a model with 563 rows, 48 columns and 1126 nonzeros Presolve removed 394 rows and 0 columns Presolve time: 0.01s Presolved: 169 rows, 48 columns, 943 nonzeros Variable types: 0 continuous, 48 integer (48 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 8.868421e+00, 92 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 8.86842 0 37 7.00000 8.86842 26.7% - 0s H 0 0 8.0000000 8.86842 10.9% - 0s Explored 0 nodes (105 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%