Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:07 2012 Optimize a model with 490 rows, 95 columns and 980 nonzeros Presolve removed 175 rows and 0 columns Presolve time: 0.00s Presolved: 315 rows, 95 columns, 787 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.405556e+01, 183 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.05556 0 94 24.00000 34.05556 41.9% - 0s H 0 0 25.0000000 34.05556 36.2% - 0s 0 0 33.65513 0 95 25.00000 33.65513 34.6% - 0s 0 0 33.33246 0 93 25.00000 33.33246 33.3% - 0s H 0 0 26.0000000 33.33246 28.2% - 0s 0 0 32.98246 0 93 26.00000 32.98246 26.9% - 0s 0 0 32.91710 0 94 26.00000 32.91710 26.6% - 0s 0 0 32.87438 0 95 26.00000 32.87438 26.4% - 0s H 0 0 27.0000000 32.87438 21.8% - 0s 0 0 32.73046 0 95 27.00000 32.73046 21.2% - 0s 0 0 32.55895 0 93 27.00000 32.55895 20.6% - 0s 0 0 32.47194 0 94 27.00000 32.47194 20.3% - 0s 0 0 32.42389 0 93 27.00000 32.42389 20.1% - 0s 0 0 32.40856 0 93 27.00000 32.40856 20.0% - 0s 0 0 32.40856 0 93 27.00000 32.40856 20.0% - 0s 0 2 32.40729 0 93 27.00000 32.40729 20.0% - 0s Cutting planes: Clique: 1 Zero half: 50 Explored 667 nodes (13180 simplex iterations) in 0.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%