Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:29 2012 Optimize a model with 928 rows, 60 columns and 1856 nonzeros Presolve removed 651 rows and 0 columns Presolve time: 0.02s Presolved: 277 rows, 60 columns, 1690 nonzeros Variable types: 0 continuous, 60 integer (60 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 9.607166e+00, 154 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 9.60717 0 56 6.00000 9.60717 60.1% - 0s H 0 0 7.0000000 9.60717 37.2% - 0s 0 0 9.34446 0 59 7.00000 9.34446 33.5% - 0s 0 0 9.29742 0 57 7.00000 9.29742 32.8% - 0s 0 0 9.26117 0 58 7.00000 9.26117 32.3% - 0s 0 0 9.24527 0 58 7.00000 9.24527 32.1% - 0s 0 0 9.23797 0 58 7.00000 9.23797 32.0% - 0s 0 0 9.23091 0 59 7.00000 9.23091 31.9% - 0s 0 0 9.23057 0 59 7.00000 9.23057 31.9% - 0s 0 0 9.23050 0 59 7.00000 9.23050 31.9% - 0s 0 2 9.22645 0 59 7.00000 9.22645 31.8% - 0s Cutting planes: Gomory: 1 Clique: 35 Zero half: 5 Explored 23 nodes (1212 simplex iterations) in 0.18 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%