current bounds on the number of colors: 0 -- 120 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:01:04 2012 Optimize a model with 43740 rows, 7927 columns and 138060 nonzeros Presolve time: 0.16s Presolved: 43740 rows, 7927 columns, 138060 nonzeros Variable types: 0 continuous, 7927 integer (7927 binary) Root relaxation: objective 0.000000e+00, 325 iterations, 0.05 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 (598 simplex iterations) in 0.27 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 -- 60 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:01:05 2012 Optimize a model with 21930 rows, 4327 columns and 69030 nonzeros Presolve time: 0.10s Presolved: 21930 rows, 4327 columns, 69030 nonzeros Variable types: 0 continuous, 4327 integer (4327 binary) Root relaxation: objective 0.000000e+00, 286 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 (539 simplex iterations) in 0.15 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 -- 30 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:01:05 2012 Optimize a model with 11025 rows, 2527 columns and 34515 nonzeros Presolve time: 0.04s Presolved: 11025 rows, 2527 columns, 34515 nonzeros Variable types: 0 continuous, 2527 integer (2527 binary) Root relaxation: objective 0.000000e+00, 254 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 (512 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% current bounds on the number of colors: 0 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:01:05 2012 Optimize a model with 5209 rows, 1567 columns and 16107 nonzeros Presolve time: 0.01s Presolved: 5209 rows, 1567 columns, 16107 nonzeros Variable types: 0 continuous, 1567 integer (1567 binary) Root relaxation: objective 0.000000e+00, 245 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 (1094 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:01:05 2012 Optimize a model with 2301 rows, 1087 columns and 6903 nonzeros Presolve time: 0.01s Presolved: 2301 rows, 1087 columns, 6903 nonzeros Variable types: 0 continuous, 1087 integer (1087 binary) Root relaxation: objective 0.000000e+00, 252 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 0 184 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3791 simplex iterations) in 0.36 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:01:06 2012 Optimize a model with 3755 rows, 1327 columns and 11505 nonzeros Presolve time: 0.01s Presolved: 3755 rows, 1327 columns, 11505 nonzeros Variable types: 0 continuous, 1327 integer (1327 binary) Root relaxation: objective 0.000000e+00, 257 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 0 234 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 0.00000 0 335 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 1s 0 0 0.00000 0 221 - 0.00000 - - 1s 0 0 0.00000 0 243 - 0.00000 - - 2s 0 0 0.00000 0 273 - 0.00000 - - 2s 0 0 0.00000 0 314 - 0.00000 - - 3s 0 0 0.00000 0 314 - 0.00000 - - 3s 0 2 0.00000 0 314 - 0.00000 - - 4s 264 35 0.00000 18 216 - 0.00000 - 72.1 5s 708 69 0.00000 17 201 - 0.00000 - 65.7 10s 716 76 0.00000 11 212 - 0.00000 - 107 15s 966 117 0.00000 24 263 - 0.00000 - 124 20s 1470 261 infeasible 33 - 0.00000 - 134 25s 1932 348 0.00000 30 205 - 0.00000 - 142 30s 2399 469 infeasible 34 - 0.00000 - 144 35s 2788 558 infeasible 34 - 0.00000 - 150 40s * 2969 0 32 0.0000000 0.00000 0.0% 151 41s Cutting planes: Gomory: 1 Clique: 4 Zero half: 17 Explored 2970 nodes (476386 simplex iterations) in 41.97 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:01:48 2012 Optimize a model with 3028 rows, 1207 columns and 9204 nonzeros Presolve time: 0.01s Presolved: 3028 rows, 1207 columns, 9204 nonzeros Variable types: 0 continuous, 1207 integer (1207 binary) Root relaxation: objective 0.000000e+00, 266 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 0 174 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 0 0.00000 0 353 - 0.00000 - - 0s 0 0 0.00000 0 351 - 0.00000 - - 1s 0 0 0.00000 0 344 - 0.00000 - - 1s 0 0 0.00000 0 341 - 0.00000 - - 1s 0 0 0.00000 0 338 - 0.00000 - - 1s 0 0 0.00000 0 335 - 0.00000 - - 1s 0 0 0.00000 0 347 - 0.00000 - - 2s 0 0 0.00000 0 345 - 0.00000 - - 2s 0 0 0.00000 0 343 - 0.00000 - - 3s 0 0 0.00000 0 343 - 0.00000 - - 3s 0 0 0.00000 0 342 - 0.00000 - - 4s 0 0 0.00000 0 342 - 0.00000 - - 4s 0 0 0.00000 0 342 - 0.00000 - - 4s 0 2 0.00000 0 342 - 0.00000 - - 5s Cutting planes: Clique: 16 Zero half: 32 Explored 21 nodes (30825 simplex iterations) in 6.18 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5