Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:50 2012 Optimize a model with 556 rows, 106 columns and 1112 nonzeros Presolve removed 199 rows and 0 columns Presolve time: 0.00s Presolved: 357 rows, 106 columns, 885 nonzeros Variable types: 0 continuous, 106 integer (106 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.788822e+01, 242 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.88822 0 101 29.00000 37.88822 30.6% - 0s H 0 0 30.0000000 37.88822 26.3% - 0s 0 0 37.63818 0 104 30.00000 37.63818 25.5% - 0s H 0 0 31.0000000 37.63818 21.4% - 0s 0 0 37.40725 0 105 31.00000 37.40725 20.7% - 0s 0 0 37.31177 0 104 31.00000 37.31177 20.4% - 0s 0 0 37.19208 0 104 31.00000 37.19208 20.0% - 0s 0 0 36.91247 0 105 31.00000 36.91247 19.1% - 0s 0 0 36.84745 0 102 31.00000 36.84745 18.9% - 0s H 0 0 32.0000000 36.84745 15.1% - 0s 0 0 36.77353 0 106 32.00000 36.77353 14.9% - 0s 0 0 36.73349 0 106 32.00000 36.73349 14.8% - 0s 0 0 36.68464 0 105 32.00000 36.68464 14.6% - 0s 0 0 36.66663 0 106 32.00000 36.66663 14.6% - 0s 0 0 36.64809 0 106 32.00000 36.64809 14.5% - 0s 0 0 36.63639 0 106 32.00000 36.63639 14.5% - 0s 0 0 36.63639 0 106 32.00000 36.63639 14.5% - 0s 0 2 36.63543 0 106 32.00000 36.63543 14.5% - 0s Cutting planes: Gomory: 1 Clique: 2 Zero half: 43 Explored 243 nodes (7385 simplex iterations) in 0.33 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%