Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:09 2012 Optimize a model with 481 rows, 96 columns and 962 nonzeros Presolve removed 163 rows and 0 columns Presolve time: 0.00s Presolved: 318 rows, 96 columns, 775 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 3.560754e+01, 205 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.60754 0 93 30.00000 35.60754 18.7% - 0s 0 0 34.85234 0 95 30.00000 34.85234 16.2% - 0s 0 0 34.70000 0 96 30.00000 34.70000 15.7% - 0s 0 0 34.34484 0 96 30.00000 34.34484 14.5% - 0s 0 0 34.26841 0 94 30.00000 34.26841 14.2% - 0s H 0 0 31.0000000 34.26841 10.5% - 0s 0 0 34.19113 0 94 31.00000 34.19113 10.3% - 0s 0 0 34.15172 0 93 31.00000 34.15172 10.2% - 0s 0 0 34.14049 0 93 31.00000 34.14049 10.1% - 0s 0 0 34.14049 0 93 31.00000 34.14049 10.1% - 0s 0 2 34.13847 0 93 31.00000 34.13847 10.1% - 0s Cutting planes: Clique: 2 Zero half: 37 Explored 50 nodes (2054 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%