Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:40 2012 Optimize a model with 1069 rows, 66 columns and 2138 nonzeros Presolve removed 777 rows and 0 columns Presolve time: 0.03s Presolved: 292 rows, 66 columns, 1809 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.090085e+01, 144 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.90085 0 54 7.00000 10.90085 55.7% - 0s H 0 0 8.0000000 10.90085 36.3% - 0s 0 0 10.46071 0 64 8.00000 10.46071 30.8% - 0s 0 0 10.36606 0 65 8.00000 10.36606 29.6% - 0s 0 0 10.34941 0 66 8.00000 10.34941 29.4% - 0s 0 0 10.29589 0 66 8.00000 10.29589 28.7% - 0s 0 0 10.27539 0 66 8.00000 10.27539 28.4% - 0s 0 0 10.25077 0 66 8.00000 10.25077 28.1% - 0s 0 0 10.24415 0 65 8.00000 10.24415 28.1% - 0s 0 0 10.23486 0 66 8.00000 10.23486 27.9% - 0s 0 0 10.23440 0 66 8.00000 10.23440 27.9% - 0s 0 2 10.22977 0 66 8.00000 10.22977 27.9% - 0s Cutting planes: Clique: 36 Zero half: 1 Explored 25 nodes (1217 simplex iterations) in 0.25 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%