Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:15:22 2012 Optimize a model with 803 rows, 175 columns and 1606 nonzeros Presolve removed 193 rows and 0 columns Presolve time: 0.01s Presolved: 610 rows, 175 columns, 1357 nonzeros Variable types: 0 continuous, 175 integer (175 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 6.800000e+01, 335 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 68.00000 0 134 56.00000 68.00000 21.4% - 0s 0 0 67.50485 0 171 56.00000 67.50485 20.5% - 0s 0 0 66.72965 0 169 56.00000 66.72965 19.2% - 0s 0 0 66.47368 0 173 56.00000 66.47368 18.7% - 0s 0 0 66.29310 0 170 56.00000 66.29310 18.4% - 0s 0 0 65.89659 0 173 56.00000 65.89659 17.7% - 0s 0 0 65.54406 0 172 56.00000 65.54406 17.0% - 0s 0 0 65.39152 0 170 56.00000 65.39152 16.8% - 0s 0 0 65.16763 0 171 56.00000 65.16763 16.4% - 0s 0 0 65.04947 0 171 56.00000 65.04947 16.2% - 0s 0 0 64.98236 0 169 56.00000 64.98236 16.0% - 0s 0 0 64.90464 0 174 56.00000 64.90464 15.9% - 0s 0 0 64.85291 0 174 56.00000 64.85291 15.8% - 0s 0 0 64.82907 0 175 56.00000 64.82907 15.8% - 0s 0 0 64.82907 0 175 56.00000 64.82907 15.8% - 0s H 0 0 57.0000000 64.82907 13.7% - 0s 0 2 64.82768 0 175 57.00000 64.82768 13.7% - 0s H 54 27 58.0000000 64.41904 11.1% 58.1 0s H 84 26 59.0000000 64.06254 8.58% 55.2 0s Cutting planes: Clique: 1 Zero half: 143 Explored 810 nodes (36843 simplex iterations) in 1.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%