Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:11:57 2013 Optimize a model with 575 rows, 225 columns and 1800 nonzeros Presolve removed 138 rows and 114 columns Presolve time: 0.00s Presolved: 437 rows, 111 columns, 1407 nonzeros Variable types: 8 continuous, 103 integer (103 binary) Found heuristic solution: objective 4451.0000000 Found heuristic solution: objective 3905.0000000 Root relaxation: objective 3.116186e+03, 26 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3116.18605 0 6 3905.00000 3116.18605 20.2% - 0s 0 0 3119.35107 0 12 3905.00000 3119.35107 20.1% - 0s H 0 0 3122.0000000 3119.35107 0.08% - 0s 0 0 3120.83914 0 14 3122.00000 3120.83914 0.04% - 0s 0 0 3120.83914 0 7 3122.00000 3120.83914 0.04% - 0s 0 0 cutoff 0 3122.00000 3121.00312 0.03% - 0s Cutting planes: Gomory: 4 Implied bound: 11 Clique: 3 MIR: 8 Explored 0 nodes (111 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.122000000000e+03, best bound 3.122000000000e+03, gap 0.0%