current bounds on the number of colors: 0 -- 102 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:28 2012 Optimize a model with 26316 rows, 5716 columns and 83844 nonzeros Presolve time: 0.14s Presolved: 26316 rows, 5716 columns, 83844 nonzeros Variable types: 0 continuous, 5716 integer (5716 binary) Root relaxation: objective 0.000000e+00, 349 iterations, 0.02 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 (597 simplex iterations) in 0.19 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 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:28 2012 Optimize a model with 12952 rows, 3064 columns and 41100 nonzeros Presolve time: 0.05s Presolved: 12952 rows, 3064 columns, 41100 nonzeros Variable types: 0 continuous, 3064 integer (3064 binary) Root relaxation: objective 0.000000e+00, 256 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 (472 simplex iterations) in 0.08 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:29 2012 Optimize a model with 6270 rows, 1738 columns and 19728 nonzeros Presolve time: 0.02s Presolved: 6270 rows, 1738 columns, 19728 nonzeros Variable types: 0 continuous, 1738 integer (1738 binary) Root relaxation: objective 0.000000e+00, 208 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 (521 simplex iterations) in 0.04 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:29 2012 Optimize a model with 3186 rows, 1126 columns and 9864 nonzeros Presolve time: 0.01s Presolved: 3186 rows, 1126 columns, 9864 nonzeros Variable types: 0 continuous, 1126 integer (1126 binary) Root relaxation: objective 0.000000e+00, 222 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 8 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1114 simplex iterations) in 0.04 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:29 2012 Optimize a model with 1644 rows, 820 columns and 4932 nonzeros Presolve time: 0.00s Presolved: 1644 rows, 820 columns, 4932 nonzeros Variable types: 0 continuous, 820 integer (820 binary) Root relaxation: objective 0.000000e+00, 231 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 0 204 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 39 Zero half: 565 Explored 0 nodes (3890 simplex iterations) in 0.43 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:29 2012 Optimize a model with 2158 rows, 922 columns and 6576 nonzeros Presolve time: 0.01s Presolved: 2158 rows, 922 columns, 6576 nonzeros Variable types: 0 continuous, 922 integer (922 binary) Root relaxation: objective 0.000000e+00, 231 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 0 194 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 0.00000 0 253 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 1s 0 0 0.00000 0 250 - 0.00000 - - 1s 0 0 0.00000 0 237 - 0.00000 - - 1s 0 0 0.00000 0 227 - 0.00000 - - 1s 0 0 0.00000 0 259 - 0.00000 - - 2s 0 0 0.00000 0 239 - 0.00000 - - 2s 0 0 0.00000 0 256 - 0.00000 - - 2s 0 0 0.00000 0 256 - 0.00000 - - 2s 0 2 0.00000 0 256 - 0.00000 - - 2s Cutting planes: Clique: 10 Zero half: 20 Explored 157 nodes (42728 simplex iterations) in 3.95 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:53:33 2012 Optimize a model with 2672 rows, 1024 columns and 8220 nonzeros Presolve time: 0.01s Presolved: 2672 rows, 1024 columns, 8220 nonzeros Variable types: 0 continuous, 1024 integer (1024 binary) Root relaxation: objective 0.000000e+00, 228 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 0 192 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1124 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% optimal solution found: number of colors: 5