Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:55:00 2012 Optimize a model with 717 rows, 120 columns and 1434 nonzeros Presolve removed 285 rows and 0 columns Presolve time: 0.00s Presolved: 432 rows, 120 columns, 1126 nonzeros Variable types: 0 continuous, 120 integer (120 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.124928e+01, 286 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.24928 0 116 29.00000 41.24928 42.2% - 0s H 0 0 31.0000000 41.24928 33.1% - 0s 0 0 40.91476 0 119 31.00000 40.91476 32.0% - 0s 0 0 40.64179 0 119 31.00000 40.64179 31.1% - 0s 0 0 40.55565 0 119 31.00000 40.55565 30.8% - 0s 0 0 40.40097 0 119 31.00000 40.40097 30.3% - 0s 0 0 40.18764 0 118 31.00000 40.18764 29.6% - 0s 0 0 40.10825 0 119 31.00000 40.10825 29.4% - 0s 0 0 40.04848 0 119 31.00000 40.04848 29.2% - 0s 0 0 39.99790 0 120 31.00000 39.99790 29.0% - 0s H 0 0 32.0000000 39.99790 25.0% - 0s 0 0 39.88790 0 118 32.00000 39.88790 24.6% - 0s 0 0 39.85999 0 118 32.00000 39.85999 24.6% - 0s H 0 0 33.0000000 39.85999 20.8% - 0s 0 0 39.85080 0 119 33.00000 39.85080 20.8% - 0s 0 0 39.85080 0 119 33.00000 39.85080 20.8% - 0s H 0 0 34.0000000 39.85080 17.2% - 0s 0 2 39.84916 0 119 34.00000 39.84916 17.2% - 0s H 175 29 35.0000000 37.75000 7.86% 37.9 0s Cutting planes: Clique: 4 Zero half: 35 Explored 256 nodes (9801 simplex iterations) in 0.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%