Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:18 2012 Optimize a model with 479 rows, 100 columns and 958 nonzeros Presolve removed 152 rows and 0 columns Presolve time: 0.00s Presolved: 327 rows, 100 columns, 772 nonzeros Variable types: 0 continuous, 100 integer (100 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.689908e+01, 198 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.89908 0 98 28.00000 36.89908 31.8% - 0s H 0 0 29.0000000 36.89908 27.2% - 0s 0 0 35.96875 0 98 29.00000 35.96875 24.0% - 0s 0 0 35.77661 0 97 29.00000 35.77661 23.4% - 0s 0 0 35.52713 0 98 29.00000 35.52713 22.5% - 0s 0 0 35.41806 0 97 29.00000 35.41806 22.1% - 0s 0 0 35.35612 0 94 29.00000 35.35612 21.9% - 0s H 0 0 31.0000000 35.35612 14.1% - 0s 0 0 35.32290 0 99 31.00000 35.32290 13.9% - 0s 0 0 35.30465 0 98 31.00000 35.30465 13.9% - 0s 0 0 35.27912 0 100 31.00000 35.27912 13.8% - 0s 0 0 35.22523 0 98 31.00000 35.22523 13.6% - 0s 0 0 35.08669 0 99 31.00000 35.08669 13.2% - 0s 0 0 34.99855 0 95 31.00000 34.99855 12.9% - 0s 0 0 34.99075 0 94 31.00000 34.99075 12.9% - 0s H 0 0 32.0000000 34.99075 9.35% - 0s 0 0 34.99059 0 98 32.00000 34.99059 9.35% - 0s 0 0 34.99059 0 98 32.00000 34.99059 9.35% - 0s 0 2 34.98948 0 98 32.00000 34.98948 9.34% - 0s Cutting planes: Zero half: 51 Explored 49 nodes (2432 simplex iterations) in 0.15 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%