Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:07 2012 Optimize a model with 582 rows, 108 columns and 1164 nonzeros Presolve removed 196 rows and 0 columns Presolve time: 0.00s Presolved: 386 rows, 108 columns, 943 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.880000e+01, 281 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.80000 0 106 28.00000 38.80000 38.6% - 0s H 0 0 29.0000000 38.80000 33.8% - 0s 0 0 38.34073 0 106 29.00000 38.34073 32.2% - 0s 0 0 37.88284 0 104 29.00000 37.88284 30.6% - 0s 0 0 37.70933 0 106 29.00000 37.70933 30.0% - 0s 0 0 37.58560 0 107 29.00000 37.58560 29.6% - 0s H 0 0 30.0000000 37.58560 25.3% - 0s 0 0 37.42176 0 105 30.00000 37.42176 24.7% - 0s 0 0 37.38776 0 103 30.00000 37.38776 24.6% - 0s 0 0 37.33513 0 106 30.00000 37.33513 24.5% - 0s 0 0 37.27573 0 106 30.00000 37.27573 24.3% - 0s 0 0 37.24018 0 108 30.00000 37.24018 24.1% - 0s H 0 0 31.0000000 37.24018 20.1% - 0s 0 0 37.18979 0 108 31.00000 37.18979 20.0% - 0s 0 0 37.17985 0 107 31.00000 37.17985 19.9% - 0s 0 0 37.08625 0 106 31.00000 37.08625 19.6% - 0s 0 0 36.99014 0 106 31.00000 36.99014 19.3% - 0s 0 0 36.95248 0 106 31.00000 36.95248 19.2% - 0s 0 0 36.93770 0 107 31.00000 36.93770 19.2% - 0s 0 0 36.93770 0 106 31.00000 36.93770 19.2% - 0s 0 2 36.93589 0 106 31.00000 36.93589 19.1% - 0s * 30 15 7 32.0000000 36.77848 14.9% 42.7 0s Cutting planes: Clique: 2 Zero half: 70 Explored 359 nodes (11853 simplex iterations) in 0.49 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%