Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:39 2012 Optimize a model with 1082 rows, 65 columns and 2164 nonzeros Presolve removed 776 rows and 0 columns Presolve time: 0.02s Presolved: 306 rows, 65 columns, 1922 nonzeros Variable types: 0 continuous, 65 integer (65 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.025983e+01, 171 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.25983 0 61 6.00000 10.25983 71.0% - 0s H 0 0 8.0000000 10.25983 28.2% - 0s 0 0 9.98314 0 64 8.00000 9.98314 24.8% - 0s 0 0 9.92089 0 64 8.00000 9.92089 24.0% - 0s 0 0 9.90620 0 65 8.00000 9.90620 23.8% - 0s 0 0 9.89090 0 64 8.00000 9.89090 23.6% - 0s 0 0 9.88462 0 65 8.00000 9.88462 23.6% - 0s 0 0 9.87166 0 64 8.00000 9.87166 23.4% - 0s 0 0 9.86514 0 64 8.00000 9.86514 23.3% - 0s 0 0 9.85527 0 64 8.00000 9.85527 23.2% - 0s 0 0 9.85268 0 64 8.00000 9.85268 23.2% - 0s 0 0 9.84481 0 64 8.00000 9.84481 23.1% - 0s 0 0 9.83516 0 64 8.00000 9.83516 22.9% - 0s 0 0 9.82731 0 63 8.00000 9.82731 22.8% - 0s 0 0 9.82636 0 63 8.00000 9.82636 22.8% - 0s 0 0 9.82603 0 63 8.00000 9.82603 22.8% - 0s 0 2 9.82573 0 63 8.00000 9.82573 22.8% - 0s Cutting planes: Clique: 27 Zero half: 8 Explored 13 nodes (977 simplex iterations) in 0.27 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%