Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:07 2012 Optimize a model with 429 rows, 95 columns and 858 nonzeros Presolve removed 152 rows and 0 columns Presolve time: 0.00s Presolved: 277 rows, 95 columns, 681 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.583333e+01, 175 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.83333 0 80 29.00000 35.83333 23.6% - 0s H 0 0 30.0000000 35.83333 19.4% - 0s 0 0 35.00000 0 85 30.00000 35.00000 16.7% - 0s H 0 0 31.0000000 35.00000 12.9% - 0s 0 0 35.00000 0 85 31.00000 35.00000 12.9% - 0s H 0 0 32.0000000 35.00000 9.37% - 0s 0 0 34.97101 0 89 32.00000 34.97101 9.28% - 0s 0 0 34.80392 0 87 32.00000 34.80392 8.76% - 0s 0 0 34.65517 0 89 32.00000 34.65517 8.30% - 0s 0 0 34.50633 0 89 32.00000 34.50633 7.83% - 0s 0 0 34.44181 0 89 32.00000 34.44181 7.63% - 0s 0 0 34.25467 0 90 32.00000 34.25467 7.05% - 0s 0 0 34.14965 0 91 32.00000 34.14965 6.72% - 0s 0 0 34.11387 0 91 32.00000 34.11387 6.61% - 0s 0 0 34.11261 0 91 32.00000 34.11261 6.60% - 0s 0 0 34.11261 0 89 32.00000 34.11261 6.60% - 0s 0 2 34.11261 0 89 32.00000 34.11261 6.60% - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 49 Explored 33 nodes (1697 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%