Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:49 2012 Optimize a model with 322 rows, 80 columns and 644 nonzeros Presolve removed 96 rows and 0 columns Presolve time: 0.00s Presolved: 226 rows, 80 columns, 520 nonzeros Variable types: 0 continuous, 80 integer (80 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.061538e+01, 149 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 30.61538 0 77 24.00000 30.61538 27.6% - 0s H 0 0 26.0000000 30.61538 17.8% - 0s 0 0 30.14941 0 80 26.00000 30.14941 16.0% - 0s 0 0 29.96393 0 79 26.00000 29.96393 15.2% - 0s 0 0 29.90299 0 79 26.00000 29.90299 15.0% - 0s 0 0 29.89198 0 80 26.00000 29.89198 15.0% - 0s 0 0 29.81025 0 79 26.00000 29.81025 14.7% - 0s 0 0 29.77582 0 80 26.00000 29.77582 14.5% - 0s 0 0 29.74895 0 80 26.00000 29.74895 14.4% - 0s H 0 0 27.0000000 29.74895 10.2% - 0s 0 0 29.67673 0 78 27.00000 29.67673 9.91% - 0s 0 0 29.59195 0 80 27.00000 29.59195 9.60% - 0s H 0 0 28.0000000 29.59195 5.69% - 0s 0 0 29.50182 0 78 28.00000 29.50182 5.36% - 0s 0 0 29.45389 0 79 28.00000 29.45389 5.19% - 0s 0 0 29.44304 0 80 28.00000 29.44304 5.15% - 0s 0 0 29.44304 0 80 28.00000 29.44304 5.15% - 0s H 0 0 29.0000000 29.44304 1.53% - 0s Cutting planes: Zero half: 30 Explored 0 nodes (546 simplex iterations) in 0.06 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%