Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:34 2012 Optimize a model with 976 rows, 63 columns and 1952 nonzeros Presolve removed 691 rows and 0 columns Presolve time: 0.02s Presolved: 285 rows, 63 columns, 1706 nonzeros Variable types: 0 continuous, 63 integer (63 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.062410e+01, 148 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.62410 0 51 6.00000 10.62410 77.1% - 0s H 0 0 7.0000000 10.62410 51.8% - 0s H 0 0 8.0000000 10.62410 32.8% - 0s 0 0 10.12770 0 62 8.00000 10.12770 26.6% - 0s 0 0 10.07951 0 60 8.00000 10.07951 26.0% - 0s 0 0 10.06007 0 61 8.00000 10.06007 25.8% - 0s 0 0 10.05983 0 60 8.00000 10.05983 25.7% - 0s 0 0 10.05069 0 60 8.00000 10.05069 25.6% - 0s 0 0 10.04398 0 61 8.00000 10.04398 25.5% - 0s 0 0 10.03448 0 58 8.00000 10.03448 25.4% - 0s 0 0 10.01791 0 62 8.00000 10.01791 25.2% - 0s 0 0 10.00552 0 61 8.00000 10.00552 25.1% - 0s 0 0 9.99374 0 61 8.00000 9.99374 24.9% - 0s 0 0 9.98770 0 58 8.00000 9.98770 24.8% - 0s 0 0 9.98352 0 61 8.00000 9.98352 24.8% - 0s 0 0 9.98301 0 61 8.00000 9.98301 24.8% - 0s 0 2 9.98283 0 61 8.00000 9.98283 24.8% - 0s Cutting planes: Clique: 32 Zero half: 5 Explored 16 nodes (1001 simplex iterations) in 0.21 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%