Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:46 2012 Optimize a model with 1119 rows, 68 columns and 2238 nonzeros Presolve removed 778 rows and 0 columns Presolve time: 0.02s Presolved: 341 rows, 68 columns, 2041 nonzeros Variable types: 0 continuous, 68 integer (68 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.112655e+01, 252 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.12655 0 59 7.00000 11.12655 59.0% - 0s H 0 0 8.0000000 11.12655 39.1% - 0s 0 0 10.88797 0 65 8.00000 10.88797 36.1% - 0s 0 0 10.84335 0 64 8.00000 10.84335 35.5% - 0s 0 0 10.82179 0 64 8.00000 10.82179 35.3% - 0s 0 0 10.79656 0 65 8.00000 10.79656 35.0% - 0s 0 0 10.78452 0 67 8.00000 10.78452 34.8% - 0s 0 0 10.77083 0 67 8.00000 10.77083 34.6% - 0s 0 0 10.76801 0 67 8.00000 10.76801 34.6% - 0s 0 0 10.76642 0 68 8.00000 10.76642 34.6% - 0s 0 2 10.76554 0 68 8.00000 10.76554 34.6% - 0s Cutting planes: Gomory: 1 Clique: 39 Zero half: 4 Explored 46 nodes (2124 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%