Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:24 2012 Optimize a model with 786 rows, 57 columns and 1572 nonzeros Presolve removed 535 rows and 0 columns Presolve time: 0.01s Presolved: 251 rows, 57 columns, 1378 nonzeros Variable types: 0 continuous, 57 integer (57 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.061994e+01, 127 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.61994 0 54 7.00000 10.61994 51.7% - 0s H 0 0 8.0000000 10.61994 32.7% - 0s 0 0 10.28371 0 57 8.00000 10.28371 28.5% - 0s 0 0 10.23691 0 57 8.00000 10.23691 28.0% - 0s 0 2 10.23210 0 57 8.00000 10.23210 27.9% - 0s Cutting planes: Clique: 23 Zero half: 4 Explored 19 nodes (688 simplex iterations) in 0.08 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%