current bounds on the number of colors: 0 -- 105 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:56:20 2012 Optimize a model with 29433 rows, 6024 columns and 93444 nonzeros Presolve time: 0.14s Presolved: 29433 rows, 6024 columns, 93444 nonzeros Variable types: 0 continuous, 6024 integer (6024 binary) Root relaxation: objective 0.000000e+00, 356 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 (593 simplex iterations) in 0.20 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 -- 52 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:56:20 2012 Optimize a model with 14769 rows, 3294 columns and 46722 nonzeros Presolve time: 0.06s Presolved: 14769 rows, 3294 columns, 46722 nonzeros Variable types: 0 continuous, 3294 integer (3294 binary) Root relaxation: objective 0.000000e+00, 251 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 (459 simplex iterations) in 0.09 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:56:20 2012 Optimize a model with 7437 rows, 1929 columns and 23361 nonzeros Presolve time: 0.02s Presolved: 7437 rows, 1929 columns, 23361 nonzeros Variable types: 0 continuous, 1929 integer (1929 binary) Root relaxation: objective 0.000000e+00, 211 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 (409 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:56:20 2012 Optimize a model with 3489 rows, 1194 columns and 10782 nonzeros Presolve time: 0.01s Presolved: 3489 rows, 1194 columns, 10782 nonzeros Variable types: 0 continuous, 1194 integer (1194 binary) Root relaxation: objective 0.000000e+00, 217 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 (743 simplex iterations) in 0.03 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 19:56:21 2012 Optimize a model with 1797 rows, 879 columns and 5391 nonzeros Presolve time: 0.00s Presolved: 1797 rows, 879 columns, 5391 nonzeros Variable types: 0 continuous, 879 integer (879 binary) Root relaxation: objective 0.000000e+00, 234 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 0 208 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3345 simplex iterations) in 0.31 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 19:56:21 2012 Optimize a model with 2361 rows, 984 columns and 7188 nonzeros Presolve time: 0.01s Presolved: 2361 rows, 984 columns, 7188 nonzeros Variable types: 0 continuous, 984 integer (984 binary) Root relaxation: objective 0.000000e+00, 229 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 0 208 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 0 0.00000 0 301 - 0.00000 - - 0s 0 0 0.00000 0 307 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 1s 0 0 0.00000 0 291 - 0.00000 - - 1s 0 0 0.00000 0 289 - 0.00000 - - 1s 0 0 0.00000 0 280 - 0.00000 - - 2s 0 0 0.00000 0 276 - 0.00000 - - 2s 0 0 0.00000 0 275 - 0.00000 - - 2s 0 0 0.00000 0 275 - 0.00000 - - 3s 0 0 0.00000 0 270 - 0.00000 - - 3s 0 0 0.00000 0 266 - 0.00000 - - 3s 0 0 0.00000 0 264 - 0.00000 - - 3s 0 0 0.00000 0 241 - 0.00000 - - 4s 0 0 0.00000 0 254 - 0.00000 - - 4s 0 0 0.00000 0 265 - 0.00000 - - 4s 0 0 0.00000 0 246 - 0.00000 - - 5s 0 0 0.00000 0 255 - 0.00000 - - 5s 0 0 0.00000 0 253 - 0.00000 - - 5s 0 2 0.00000 0 244 - 0.00000 - - 6s Cutting planes: Clique: 15 Zero half: 27 Explored 61 nodes (47454 simplex iterations) in 6.71 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 19:56:28 2012 Optimize a model with 2925 rows, 1089 columns and 8985 nonzeros Presolve time: 0.01s Presolved: 2925 rows, 1089 columns, 8985 nonzeros Variable types: 0 continuous, 1089 integer (1089 binary) Root relaxation: objective 0.000000e+00, 225 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 0 119 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 5 Clique: 30 Zero half: 137 Explored 0 nodes (2574 simplex iterations) in 0.17 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