current bounds on the number of colors: 0 -- 121 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:17:14 2012 Optimize a model with 44521 rows, 8000 columns and 140460 nonzeros Presolve time: 0.16s Presolved: 44521 rows, 8000 columns, 140460 nonzeros Variable types: 0 continuous, 8000 integer (8000 binary) Root relaxation: objective 0.000000e+00, 289 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 (668 simplex iterations) in 0.30 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 21:17:14 2012 Optimize a model with 22321 rows, 4370 columns and 70230 nonzeros Presolve time: 0.10s Presolved: 22321 rows, 4370 columns, 70230 nonzeros Variable types: 0 continuous, 4370 integer (4370 binary) Root relaxation: objective 0.000000e+00, 297 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 (723 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% current bounds on the number of colors: 0 -- 30 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:17:15 2012 Optimize a model with 11221 rows, 2555 columns and 35115 nonzeros Presolve time: 0.04s Presolved: 11221 rows, 2555 columns, 35115 nonzeros Variable types: 0 continuous, 2555 integer (2555 binary) Root relaxation: objective 0.000000e+00, 245 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 (496 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 21:17:15 2012 Optimize a model with 5301 rows, 1587 columns and 16387 nonzeros Presolve time: 0.01s Presolved: 5301 rows, 1587 columns, 16387 nonzeros Variable types: 0 continuous, 1587 integer (1587 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1055 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 21:17:15 2012 Optimize a model with 2341 rows, 1103 columns and 7023 nonzeros Presolve time: 0.01s Presolved: 2341 rows, 1103 columns, 7023 nonzeros Variable types: 0 continuous, 1103 integer (1103 binary) Root relaxation: objective 0.000000e+00, 268 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 0 200 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4299 simplex iterations) in 0.41 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 21:17:16 2012 Optimize a model with 3821 rows, 1345 columns and 11705 nonzeros Presolve time: 0.01s Presolved: 3821 rows, 1345 columns, 11705 nonzeros Variable types: 0 continuous, 1345 integer (1345 binary) Root relaxation: objective 0.000000e+00, 256 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 0 242 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 1s 0 0 0.00000 0 317 - 0.00000 - - 1s 0 0 0.00000 0 331 - 0.00000 - - 1s 0 0 0.00000 0 331 - 0.00000 - - 2s 0 2 0.00000 0 331 - 0.00000 - - 2s 507 105 0.00000 22 237 - 0.00000 - 84.1 5s 615 122 0.00000 33 330 - 0.00000 - 82.3 10s 922 143 0.00000 29 213 - 0.00000 - 139 15s 1401 180 infeasible 33 - 0.00000 - 148 20s 1843 232 infeasible 34 - 0.00000 - 157 25s 2272 251 0.00000 31 244 - 0.00000 - 161 30s 2709 222 0.00000 32 188 - 0.00000 - 165 35s 3126 251 0.00000 29 243 - 0.00000 - 167 40s 3536 259 infeasible 36 - 0.00000 - 170 45s * 3926 2 32 0.0000000 0.00000 0.0% 173 49s Cutting planes: Gomory: 2 Clique: 4 Zero half: 16 Explored 3927 nodes (695985 simplex iterations) in 49.81 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 21:18:06 2012 Optimize a model with 3081 rows, 1224 columns and 9364 nonzeros Presolve time: 0.01s Presolved: 3081 rows, 1224 columns, 9364 nonzeros Variable types: 0 continuous, 1224 integer (1224 binary) Root relaxation: objective 0.000000e+00, 261 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 0 238 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 348 - 0.00000 - - 0s 0 0 0.00000 0 346 - 0.00000 - - 1s 0 0 0.00000 0 348 - 0.00000 - - 1s 0 0 0.00000 0 342 - 0.00000 - - 2s 0 0 0.00000 0 337 - 0.00000 - - 2s 0 0 0.00000 0 334 - 0.00000 - - 3s 0 0 0.00000 0 333 - 0.00000 - - 3s 0 0 0.00000 0 343 - 0.00000 - - 4s 0 0 0.00000 0 342 - 0.00000 - - 4s 0 0 0.00000 0 338 - 0.00000 - - 5s 0 0 0.00000 0 337 - 0.00000 - - 5s 0 0 0.00000 0 331 - 0.00000 - - 6s 0 0 0.00000 0 337 - 0.00000 - - 6s 0 0 0.00000 0 336 - 0.00000 - - 7s 0 0 0.00000 0 335 - 0.00000 - - 7s 0 0 0.00000 0 341 - 0.00000 - - 8s 0 0 0.00000 0 341 - 0.00000 - - 8s 0 2 0.00000 0 341 - 0.00000 - - 9s 20 4 infeasible 7 - 0.00000 - 345 10s Cutting planes: Clique: 17 Zero half: 42 Explored 35 nodes (53406 simplex iterations) in 10.43 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