current bounds on the number of colors: 0 -- 41 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:57 2012 Optimize a model with 7761 rows, 1206 columns and 23980 nonzeros Presolve time: 0.03s Presolved: 7761 rows, 1206 columns, 23980 nonzeros Variable types: 0 continuous, 1206 integer (1206 binary) Root relaxation: objective 0.000000e+00, 90 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (196 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 20 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:57 2012 Optimize a model with 3901 rows, 796 columns and 11990 nonzeros Presolve time: 0.01s Presolved: 3901 rows, 796 columns, 11990 nonzeros Variable types: 0 continuous, 796 integer (796 binary) Root relaxation: objective 0.000000e+00, 89 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (327 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:57 2012 Optimize a model with 1971 rows, 591 columns and 5995 nonzeros Presolve time: 0.00s Presolved: 1971 rows, 591 columns, 5995 nonzeros Variable types: 0 continuous, 591 integer (591 binary) Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 44 - 0.00000 - - 0s 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1432 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 5 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:57 2012 Optimize a model with 2743 rows, 673 columns and 8393 nonzeros Presolve time: 0.01s Presolved: 2743 rows, 673 columns, 8393 nonzeros Variable types: 0 continuous, 673 integer (673 binary) Root relaxation: objective 0.000000e+00, 82 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 42 - 0.00000 - - 0s 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 107 - 0.00000 - - 0s 0 0 0.00000 0 116 - 0.00000 - - 0s 0 0 0.00000 0 72 - 0.00000 - - 0s 0 0 0.00000 0 69 - 0.00000 - - 0s 0 0 0.00000 0 121 - 0.00000 - - 0s 0 0 0.00000 0 84 - 0.00000 - - 1s 0 0 0.00000 0 54 - 0.00000 - - 1s 0 0 0.00000 0 108 - 0.00000 - - 1s 0 0 0.00000 0 109 - 0.00000 - - 1s 0 0 0.00000 0 107 - 0.00000 - - 1s 0 2 0.00000 0 107 - 0.00000 - - 1s Cutting planes: Clique: 12 Zero half: 12 Explored 13 nodes (19580 simplex iterations) in 1.92 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 7 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:00:59 2012 Optimize a model with 3129 rows, 714 columns and 9592 nonzeros Presolve time: 0.01s Presolved: 3129 rows, 714 columns, 9592 nonzeros Variable types: 0 continuous, 714 integer (714 binary) Root relaxation: objective 0.000000e+00, 89 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 42 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 46 MIR: 27 Zero half: 22 Explored 0 nodes (908 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 8