current bounds on the number of colors: 0 -- 120 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:08:44 2012 Optimize a model with 43140 rows, 7917 columns and 136260 nonzeros Presolve time: 0.16s Presolved: 43140 rows, 7917 columns, 136260 nonzeros Variable types: 0 continuous, 7917 integer (7917 binary) Root relaxation: objective 0.000000e+00, 307 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 (568 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 21:08:45 2012 Optimize a model with 21630 rows, 4317 columns and 68130 nonzeros Presolve time: 0.09s Presolved: 21630 rows, 4317 columns, 68130 nonzeros Variable types: 0 continuous, 4317 integer (4317 binary) Root relaxation: objective 0.000000e+00, 301 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 (611 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 21:08:45 2012 Optimize a model with 10875 rows, 2517 columns and 34065 nonzeros Presolve time: 0.04s Presolved: 10875 rows, 2517 columns, 34065 nonzeros Variable types: 0 continuous, 2517 integer (2517 binary) Root relaxation: objective 0.000000e+00, 243 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 (494 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 21:08:46 2012 Optimize a model with 5139 rows, 1557 columns and 15897 nonzeros Presolve time: 0.01s Presolved: 5139 rows, 1557 columns, 15897 nonzeros Variable types: 0 continuous, 1557 integer (1557 binary) Root relaxation: objective 0.000000e+00, 260 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 (862 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:08:46 2012 Optimize a model with 2271 rows, 1077 columns and 6813 nonzeros Presolve time: 0.01s Presolved: 2271 rows, 1077 columns, 6813 nonzeros Variable types: 0 continuous, 1077 integer (1077 binary) Root relaxation: objective 0.000000e+00, 270 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 206 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (5263 simplex iterations) in 0.53 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 21:08:46 2012 Optimize a model with 3705 rows, 1317 columns and 11355 nonzeros Presolve time: 0.01s Presolved: 3705 rows, 1317 columns, 11355 nonzeros Variable types: 0 continuous, 1317 integer (1317 binary) Root relaxation: objective 0.000000e+00, 260 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 0 228 - 0.00000 - - 0s 0 0 0.00000 0 226 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 261 - 0.00000 - - 1s 0 0 0.00000 0 231 - 0.00000 - - 1s 0 0 0.00000 0 256 - 0.00000 - - 1s 0 0 0.00000 0 151 - 0.00000 - - 2s 0 0 0.00000 0 166 - 0.00000 - - 2s 0 0 0.00000 0 187 - 0.00000 - - 2s 0 0 0.00000 0 187 - 0.00000 - - 2s 0 2 0.00000 0 187 - 0.00000 - - 3s 290 143 0.00000 17 178 - 0.00000 - 95.7 5s 809 214 0.00000 18 260 - 0.00000 - 70.9 10s 1027 236 0.00000 34 243 - 0.00000 - 110 15s 1562 198 0.00000 38 170 - 0.00000 - 128 20s 2078 276 infeasible 31 - 0.00000 - 135 25s 2593 319 infeasible 32 - 0.00000 - 140 30s 3090 384 infeasible 37 - 0.00000 - 145 35s * 3257 0 34 0.0000000 0.00000 0.0% 146 36s Cutting planes: Gomory: 1 Clique: 5 Zero half: 10 Explored 3258 nodes (499768 simplex iterations) in 36.68 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 21:09:23 2012 Optimize a model with 2988 rows, 1197 columns and 9084 nonzeros Presolve time: 0.01s Presolved: 2988 rows, 1197 columns, 9084 nonzeros Variable types: 0 continuous, 1197 integer (1197 binary) Root relaxation: objective 0.000000e+00, 281 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 209 - 0.00000 - - 0s 0 0 0.00000 0 367 - 0.00000 - - 0s 0 0 0.00000 0 374 - 0.00000 - - 1s 0 0 0.00000 0 355 - 0.00000 - - 2s 0 0 0.00000 0 344 - 0.00000 - - 2s 0 0 0.00000 0 338 - 0.00000 - - 3s 0 0 0.00000 0 350 - 0.00000 - - 4s 0 0 0.00000 0 341 - 0.00000 - - 5s 0 0 0.00000 0 339 - 0.00000 - - 5s 0 0 0.00000 0 338 - 0.00000 - - 6s 0 0 0.00000 0 337 - 0.00000 - - 7s 0 0 0.00000 0 349 - 0.00000 - - 7s 0 0 0.00000 0 339 - 0.00000 - - 8s 0 0 0.00000 0 343 - 0.00000 - - 8s 0 0 0.00000 0 343 - 0.00000 - - 8s 0 2 0.00000 0 343 - 0.00000 - - 9s Cutting planes: Clique: 6 Zero half: 22 Explored 11 nodes (44275 simplex iterations) in 9.82 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