Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:44 2012 Optimize a model with 546 rows, 105 columns and 1092 nonzeros Presolve removed 203 rows and 0 columns Presolve time: 0.00s Presolved: 343 rows, 105 columns, 856 nonzeros Variable types: 0 continuous, 105 integer (105 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.781944e+01, 234 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.81944 0 104 26.00000 37.81944 45.5% - 0s H 0 0 30.0000000 37.81944 26.1% - 0s 0 0 37.27622 0 103 30.00000 37.27622 24.3% - 0s H 0 0 31.0000000 37.27622 20.2% - 0s 0 0 37.09120 0 102 31.00000 37.09120 19.6% - 0s 0 0 36.91711 0 103 31.00000 36.91711 19.1% - 0s 0 0 36.79778 0 104 31.00000 36.79778 18.7% - 0s H 0 0 32.0000000 36.79778 15.0% - 0s 0 0 36.70675 0 102 32.00000 36.70675 14.7% - 0s 0 0 36.61027 0 102 32.00000 36.61027 14.4% - 0s 0 0 36.56395 0 103 32.00000 36.56395 14.3% - 0s 0 0 36.50710 0 105 32.00000 36.50710 14.1% - 0s 0 0 36.43893 0 104 32.00000 36.43893 13.9% - 0s 0 0 36.28678 0 104 32.00000 36.28678 13.4% - 0s 0 0 36.19327 0 104 32.00000 36.19327 13.1% - 0s 0 0 36.18424 0 104 32.00000 36.18424 13.1% - 0s 0 0 36.18424 0 104 32.00000 36.18424 13.1% - 0s 0 2 36.18403 0 104 32.00000 36.18403 13.1% - 0s Cutting planes: Clique: 3 Zero half: 45 Explored 140 nodes (4971 simplex iterations) in 0.25 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%