current bounds on the number of colors: 0 -- 107 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:00 2012 Optimize a model with 30423 rows, 6243 columns and 96619 nonzeros Presolve time: 0.15s Presolved: 30423 rows, 6243 columns, 96619 nonzeros Variable types: 0 continuous, 6243 integer (6243 binary) Root relaxation: objective 0.000000e+00, 378 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 (671 simplex iterations) in 0.22 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 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:00 2012 Optimize a model with 14979 rows, 3354 columns and 47398 nonzeros Presolve time: 0.06s Presolved: 14979 rows, 3354 columns, 47398 nonzeros Variable types: 0 continuous, 3354 integer (3354 binary) Root relaxation: objective 0.000000e+00, 280 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 (503 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 19:59:01 2012 Optimize a model with 7543 rows, 1963 columns and 23699 nonzeros Presolve time: 0.02s Presolved: 7543 rows, 1963 columns, 23699 nonzeros Variable types: 0 continuous, 1963 integer (1963 binary) Root relaxation: objective 0.000000e+00, 221 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 (433 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 19:59:01 2012 Optimize a model with 3539 rows, 1214 columns and 10938 nonzeros Presolve time: 0.01s Presolved: 3539 rows, 1214 columns, 10938 nonzeros Variable types: 0 continuous, 1214 integer (1214 binary) Root relaxation: objective 0.000000e+00, 223 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 (1186 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:59:01 2012 Optimize a model with 1823 rows, 893 columns and 5469 nonzeros Presolve time: 0.00s Presolved: 1823 rows, 893 columns, 5469 nonzeros Variable types: 0 continuous, 893 integer (893 binary) Root relaxation: objective 0.000000e+00, 251 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 0 172 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 321 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 25 Zero half: 619 Explored 0 nodes (4347 simplex iterations) in 0.52 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 19:59:01 2012 Optimize a model with 2395 rows, 1000 columns and 7292 nonzeros Presolve time: 0.01s Presolved: 2395 rows, 1000 columns, 7292 nonzeros Variable types: 0 continuous, 1000 integer (1000 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 0 212 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 0 0.00000 0 231 - 0.00000 - - 0s 0 0 0.00000 0 311 - 0.00000 - - 0s 0 0 0.00000 0 289 - 0.00000 - - 1s 0 0 0.00000 0 288 - 0.00000 - - 1s 0 0 0.00000 0 286 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 2s 0 0 0.00000 0 286 - 0.00000 - - 2s 0 0 0.00000 0 287 - 0.00000 - - 2s 0 0 0.00000 0 285 - 0.00000 - - 2s 0 2 0.00000 0 285 - 0.00000 - - 3s Cutting planes: Clique: 10 Zero half: 32 Explored 164 nodes (44265 simplex iterations) in 4.78 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 19:59:06 2012 Optimize a model with 2967 rows, 1107 columns and 9115 nonzeros Presolve time: 0.01s Presolved: 2967 rows, 1107 columns, 9115 nonzeros Variable types: 0 continuous, 1107 integer (1107 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 0 157 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 1s 0 0 0.00000 0 241 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 1 Zero half: 83 Explored 0 nodes (17505 simplex iterations) in 1.65 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