current bounds on the number of colors: 0 -- 160 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:20:06 2012 Optimize a model with 49840 rows, 13421 columns and 161840 nonzeros Presolve time: 0.17s Presolved: 49840 rows, 13421 columns, 161840 nonzeros Variable types: 0 continuous, 13421 integer (13421 binary) Root relaxation: objective 0.000000e+00, 581 iterations, 0.04 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 (948 simplex iterations) in 0.28 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 -- 80 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:20:06 2012 Optimize a model with 25000 rows, 7021 columns and 80920 nonzeros Presolve time: 0.13s Presolved: 25000 rows, 7021 columns, 80920 nonzeros Variable types: 0 continuous, 7021 integer (7021 binary) Root relaxation: objective 0.000000e+00, 490 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 (845 simplex iterations) in 0.18 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:20:07 2012 Optimize a model with 12580 rows, 3821 columns and 40460 nonzeros Presolve time: 0.05s Presolved: 12580 rows, 3821 columns, 40460 nonzeros Variable types: 0 continuous, 3821 integer (3821 binary) Root relaxation: objective 0.000000e+00, 326 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 (591 simplex iterations) in 0.07 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 Fri Dec 14 19:20:07 2012 Optimize a model with 6370 rows, 2221 columns and 20230 nonzeros Presolve time: 0.02s Presolved: 6370 rows, 2221 columns, 20230 nonzeros Variable types: 0 continuous, 2221 integer (2221 binary) Root relaxation: objective 0.000000e+00, 336 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 (589 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:20:07 2012 Optimize a model with 3265 rows, 1421 columns and 10115 nonzeros Presolve time: 0.01s Presolved: 3265 rows, 1421 columns, 10115 nonzeros Variable types: 0 continuous, 1421 integer (1421 binary) Root relaxation: objective 0.000000e+00, 364 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 (1153 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:20:07 2012 Optimize a model with 1402 rows, 941 columns and 4046 nonzeros Presolve removed 160 rows and 160 columns Presolve time: 0.00s Presolved: 1242 rows, 781 columns, 3726 nonzeros Variable types: 0 continuous, 781 integer (781 binary) Root relaxation: objective 0.000000e+00, 167 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 0 160 - 0.00000 - - 0s Explored 0 nodes (687 simplex iterations) in 0.02 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: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:20:07 2012 Optimize a model with 2023 rows, 1101 columns and 6069 nonzeros Presolve time: 0.01s Presolved: 2023 rows, 1101 columns, 6069 nonzeros Variable types: 0 continuous, 1101 integer (1101 binary) Root relaxation: objective 0.000000e+00, 361 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 0 316 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 0s 0 0 0.00000 0 435 - 0.00000 - - 0s 0 0 0.00000 0 418 - 0.00000 - - 1s 0 0 0.00000 0 413 - 0.00000 - - 1s 0 0 0.00000 0 421 - 0.00000 - - 1s 0 0 0.00000 0 413 - 0.00000 - - 2s 0 0 0.00000 0 398 - 0.00000 - - 2s 0 0 0.00000 0 414 - 0.00000 - - 3s 0 0 0.00000 0 425 - 0.00000 - - 3s 0 0 0.00000 0 298 - 0.00000 - - 3s 0 2 0.00000 0 298 - 0.00000 - - 3s Cutting planes: Zero half: 25 Explored 3 nodes (27157 simplex iterations) in 3.96 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:20:11 2012 Optimize a model with 2644 rows, 1261 columns and 8092 nonzeros Presolve time: 0.01s Presolved: 2644 rows, 1261 columns, 8092 nonzeros Variable types: 0 continuous, 1261 integer (1261 binary) Root relaxation: objective 0.000000e+00, 360 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 0 290 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 325 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 239 - 0.00000 - - 1s 0 0 0.00000 0 216 - 0.00000 - - 1s 0 0 0.00000 0 219 - 0.00000 - - 1s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 198 - 0.00000 - - 1s 0 0 0.00000 0 180 - 0.00000 - - 2s 0 0 0.00000 0 180 - 0.00000 - - 2s 0 0 0.00000 0 176 - 0.00000 - - 2s 0 0 0.00000 0 172 - 0.00000 - - 2s 0 0 0.00000 0 178 - 0.00000 - - 2s 0 0 0.00000 0 176 - 0.00000 - - 2s 0 2 0.00000 0 176 - 0.00000 - - 3s * 90 5 26 0.0000000 0.00000 0.0% 80.3 3s Cutting planes: Zero half: 18 Explored 91 nodes (45987 simplex iterations) in 3.69 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: 4