Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:21 2012 Optimize a model with 731 rows, 54 columns and 1462 nonzeros Presolve removed 523 rows and 0 columns Presolve time: 0.01s Presolved: 208 rows, 54 columns, 1182 nonzeros Variable types: 0 continuous, 54 integer (54 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 9.527116e+00, 126 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 9.52712 0 47 6.00000 9.52712 58.8% - 0s H 0 0 7.0000000 9.52712 36.1% - 0s 0 0 9.30991 0 50 7.00000 9.30991 33.0% - 0s 0 0 9.25816 0 49 7.00000 9.25816 32.3% - 0s 0 0 9.20973 0 50 7.00000 9.20973 31.6% - 0s 0 0 9.19231 0 50 7.00000 9.19231 31.3% - 0s 0 0 9.19093 0 50 7.00000 9.19093 31.3% - 0s 0 2 9.19014 0 50 7.00000 9.19014 31.3% - 0s Cutting planes: Gomory: 1 Clique: 22 Zero half: 8 Explored 21 nodes (866 simplex iterations) in 0.09 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%