Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:35:50 2012 Optimize a model with 5235 rows, 812 columns and 16378 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 5233 rows, 810 columns, 21741 nonzeros Variable types: 0 continuous, 810 integer (810 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.733333e+00, 3406 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.73333 0 541 28.00000 3.73333 86.7% - 0s 0 0 6.00000 0 104 28.00000 6.00000 78.6% - 1s H 0 0 27.0000000 6.00000 77.8% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 18 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 61 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 104 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 32 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 30 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 20 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 69 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 86 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 91 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 91 7.00000 6.00000 14.3% - 1s 0 2 6.00000 0 91 7.00000 6.00000 14.3% - 1s Cutting planes: Clique: 5 Zero half: 8 Explored 8 nodes (13932 simplex iterations) in 1.93 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%