Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:06 2012 Optimize a model with 1327 rows, 74 columns and 2654 nonzeros Presolve removed 908 rows and 0 columns Presolve time: 0.03s Presolved: 419 rows, 74 columns, 2609 nonzeros Variable types: 0 continuous, 74 integer (74 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.177041e+01, 298 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.77041 0 71 6.00000 11.77041 96.2% - 0s H 0 0 7.0000000 11.77041 68.1% - 0s H 0 0 8.0000000 11.77041 47.1% - 0s 0 0 11.50419 0 73 8.00000 11.50419 43.8% - 0s 0 0 11.44600 0 72 8.00000 11.44600 43.1% - 0s 0 0 11.41997 0 74 8.00000 11.41997 42.7% - 0s 0 0 11.40491 0 73 8.00000 11.40491 42.6% - 0s 0 0 11.38480 0 74 8.00000 11.38480 42.3% - 0s 0 0 11.38386 0 74 8.00000 11.38386 42.3% - 0s 0 0 11.38357 0 73 8.00000 11.38357 42.3% - 0s 0 0 11.38089 0 74 8.00000 11.38089 42.3% - 0s 0 0 11.37253 0 74 8.00000 11.37253 42.2% - 0s 0 0 11.36881 0 73 8.00000 11.36881 42.1% - 0s 0 0 11.36086 0 73 8.00000 11.36086 42.0% - 0s 0 0 11.35738 0 74 8.00000 11.35738 42.0% - 0s 0 0 11.35713 0 74 8.00000 11.35713 42.0% - 0s 0 0 11.35673 0 74 8.00000 11.35673 42.0% - 0s 0 2 11.35606 0 74 8.00000 11.35606 42.0% - 0s Cutting planes: Clique: 36 Zero half: 8 Explored 53 nodes (3485 simplex iterations) in 0.57 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%