Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:08:46 2012 Optimize a model with 2828 rows, 552 columns and 8922 nonzeros Presolve removed 909 rows and 2 columns Presolve time: 0.07s Presolved: 1919 rows, 550 columns, 10492 nonzeros Variable types: 0 continuous, 550 integer (550 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 6.000000e+00, 1181 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 6.00000 0 80 23.00000 6.00000 73.9% - 0s H 0 0 17.0000000 6.00000 64.7% - 0s H 0 0 14.0000000 6.00000 57.1% - 0s 0 0 6.00000 0 31 14.00000 6.00000 57.1% - 0s H 0 0 11.0000000 6.00000 45.5% - 0s H 0 0 7.0000000 6.00000 14.3% - 0s 0 0 6.00000 0 164 7.00000 6.00000 14.3% - 0s 0 0 6.00000 0 42 7.00000 6.00000 14.3% - 0s 0 0 6.00000 0 10 7.00000 6.00000 14.3% - 0s 0 0 6.00000 0 19 7.00000 6.00000 14.3% - 0s 0 0 6.00000 0 14 7.00000 6.00000 14.3% - 0s 0 0 6.00000 0 28 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 23 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 26 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 14 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 12 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 30 7.00000 6.00000 14.3% - 1s 0 2 6.00000 0 30 7.00000 6.00000 14.3% - 1s Cutting planes: Gomory: 3 Clique: 2 Zero half: 13 Explored 32 nodes (21573 simplex iterations) in 2.40 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%