Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:36:06 2012 Optimize a model with 5403 rows, 812 columns and 16882 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 5429 rows, 810 columns, 22599 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.733333e+00, 4930 iterations, 0.27 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.73333 0 552 28.00000 3.73333 86.7% - 1s H 0 0 26.0000000 3.73333 85.6% - 1s 0 0 6.00000 0 113 26.00000 6.00000 76.9% - 1s H 0 0 13.0000000 6.00000 53.8% - 1s 0 0 6.00000 0 115 13.00000 6.00000 53.8% - 1s H 0 0 9.0000000 6.00000 33.3% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 88 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 82 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 110 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 18 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 32 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 18 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 88 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 93 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 73 7.00000 6.00000 14.3% - 2s 0 2 6.00000 0 16 7.00000 6.00000 14.3% - 2s Cutting planes: Clique: 4 Zero half: 3 Explored 13 nodes (17284 simplex iterations) in 2.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%