Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:50 2012 Optimize a model with 596 rows, 111 columns and 1192 nonzeros Presolve removed 216 rows and 0 columns Presolve time: 0.00s Presolved: 380 rows, 111 columns, 943 nonzeros Variable types: 0 continuous, 111 integer (111 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 3.934010e+01, 281 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.34010 0 110 30.00000 39.34010 31.1% - 0s 0 0 38.91514 0 109 30.00000 38.91514 29.7% - 0s 0 0 38.79887 0 110 30.00000 38.79887 29.3% - 0s 0 0 38.73968 0 110 30.00000 38.73968 29.1% - 0s 0 0 38.50629 0 109 30.00000 38.50629 28.4% - 0s 0 0 38.34725 0 110 30.00000 38.34725 27.8% - 0s 0 0 38.31270 0 109 30.00000 38.31270 27.7% - 0s 0 0 38.22212 0 110 30.00000 38.22212 27.4% - 0s 0 0 37.98122 0 108 30.00000 37.98122 26.6% - 0s H 0 0 31.0000000 37.98122 22.5% - 0s 0 0 37.92097 0 108 31.00000 37.92097 22.3% - 0s 0 0 37.71002 0 111 31.00000 37.71002 21.6% - 0s H 0 0 32.0000000 37.71002 17.8% - 0s 0 0 37.56968 0 110 32.00000 37.56968 17.4% - 0s 0 0 37.52893 0 109 32.00000 37.52893 17.3% - 0s 0 0 37.49823 0 108 32.00000 37.49823 17.2% - 0s 0 0 37.43382 0 109 32.00000 37.43382 17.0% - 0s 0 0 37.41657 0 110 32.00000 37.41657 16.9% - 0s 0 0 37.41657 0 110 32.00000 37.41657 16.9% - 0s 0 2 37.41535 0 110 32.00000 37.41535 16.9% - 0s Cutting planes: Clique: 1 Zero half: 70 Explored 769 nodes (19710 simplex iterations) in 0.73 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%