Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:14 2012 Optimize a model with 504 rows, 99 columns and 1008 nonzeros Presolve removed 173 rows and 0 columns Presolve time: 0.00s Presolved: 331 rows, 99 columns, 819 nonzeros Variable types: 0 continuous, 99 integer (99 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.561997e+01, 207 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.61997 0 96 25.00000 35.61997 42.5% - 0s H 0 0 26.0000000 35.61997 37.0% - 0s H 0 0 27.0000000 35.61997 31.9% - 0s 0 0 35.09434 0 97 27.00000 35.09434 30.0% - 0s 0 0 34.94217 0 98 27.00000 34.94217 29.4% - 0s 0 0 34.88840 0 94 27.00000 34.88840 29.2% - 0s 0 0 34.73113 0 98 27.00000 34.73113 28.6% - 0s 0 0 34.61152 0 98 27.00000 34.61152 28.2% - 0s 0 0 34.47335 0 98 27.00000 34.47335 27.7% - 0s 0 0 34.38150 0 98 27.00000 34.38150 27.3% - 0s 0 0 34.35572 0 98 27.00000 34.35572 27.2% - 0s 0 0 34.33004 0 99 27.00000 34.33004 27.1% - 0s 0 0 34.26539 0 98 27.00000 34.26539 26.9% - 0s 0 0 34.18085 0 98 27.00000 34.18085 26.6% - 0s 0 0 34.13157 0 98 27.00000 34.13157 26.4% - 0s 0 0 34.10606 0 99 27.00000 34.10606 26.3% - 0s 0 0 34.08396 0 99 27.00000 34.08396 26.2% - 0s 0 0 34.05801 0 99 27.00000 34.05801 26.1% - 0s 0 0 34.03291 0 98 27.00000 34.03291 26.0% - 0s 0 0 34.03099 0 98 27.00000 34.03099 26.0% - 0s 0 0 34.03099 0 98 27.00000 34.03099 26.0% - 0s 0 2 34.02918 0 98 27.00000 34.02918 26.0% - 0s H 21 13 28.0000000 33.81044 20.8% 37.0 0s * 333 61 14 29.0000000 31.56410 8.84% 22.2 0s Cutting planes: Clique: 1 Zero half: 45 Explored 474 nodes (10584 simplex iterations) in 0.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%