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 139 rows and 0 columns Presolve time: 0.00s Presolved: 290 rows, 95 columns, 686 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.562500e+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 35.62500 0 87 26.00000 35.62500 37.0% - 0s H 0 0 28.0000000 35.62500 27.2% - 0s 0 0 34.97026 0 94 28.00000 34.97026 24.9% - 0s 0 0 34.64608 0 93 28.00000 34.64608 23.7% - 0s 0 0 34.48692 0 90 28.00000 34.48692 23.2% - 0s 0 0 34.31117 0 92 28.00000 34.31117 22.5% - 0s 0 0 34.15217 0 94 28.00000 34.15217 22.0% - 0s H 0 0 29.0000000 34.15217 17.8% - 0s 0 0 34.00000 0 95 29.00000 34.00000 17.2% - 0s 0 0 33.95644 0 94 29.00000 33.95644 17.1% - 0s 0 0 33.85380 0 95 29.00000 33.85380 16.7% - 0s H 0 0 30.0000000 33.85380 12.8% - 0s 0 0 33.72841 0 95 30.00000 33.72841 12.4% - 0s 0 0 33.70124 0 95 30.00000 33.70124 12.3% - 0s 0 0 33.65832 0 95 30.00000 33.65832 12.2% - 0s 0 0 33.64359 0 95 30.00000 33.64359 12.1% - 0s 0 0 33.64359 0 95 30.00000 33.64359 12.1% - 0s 0 2 33.64352 0 95 30.00000 33.64352 12.1% - 0s Cutting planes: Clique: 3 Zero half: 62 Explored 113 nodes (3165 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%