current bounds on the number of colors: 0 -- 125 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:37:13 2012 Optimize a model with 47741 rows, 8518 columns and 150598 nonzeros Presolve time: 0.16s Presolved: 47741 rows, 8518 columns, 150598 nonzeros Variable types: 0 continuous, 8518 integer (8518 binary) Root relaxation: objective 0.000000e+00, 320 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 (597 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 -- 62 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:37:14 2012 Optimize a model with 23933 rows, 4643 columns and 75299 nonzeros Presolve time: 0.11s Presolved: 23933 rows, 4643 columns, 75299 nonzeros Variable types: 0 continuous, 4643 integer (4643 binary) Root relaxation: objective 0.000000e+00, 296 iterations, 0.03 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 (577 simplex iterations) in 0.16 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 -- 31 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:37:14 2012 Optimize a model with 11645 rows, 2643 columns and 36435 nonzeros Presolve time: 0.04s Presolved: 11645 rows, 2643 columns, 36435 nonzeros Variable types: 0 continuous, 2643 integer (2643 binary) Root relaxation: objective 0.000000e+00, 255 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 (687 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 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:37:15 2012 Optimize a model with 5501 rows, 1643 columns and 17003 nonzeros Presolve time: 0.01s Presolved: 5501 rows, 1643 columns, 17003 nonzeros Variable types: 0 continuous, 1643 integer (1643 binary) Root relaxation: objective 0.000000e+00, 262 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 (1252 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 22:37:15 2012 Optimize a model with 2429 rows, 1143 columns and 7287 nonzeros Presolve time: 0.01s Presolved: 2429 rows, 1143 columns, 7287 nonzeros Variable types: 0 continuous, 1143 integer (1143 binary) Root relaxation: objective 0.000000e+00, 276 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 0 210 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3735 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 22:37:15 2012 Optimize a model with 3965 rows, 1393 columns and 12145 nonzeros Presolve time: 0.01s Presolved: 3965 rows, 1393 columns, 12145 nonzeros Variable types: 0 continuous, 1393 integer (1393 binary) Root relaxation: objective 0.000000e+00, 259 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 0 236 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 0s 0 0 0.00000 0 335 - 0.00000 - - 1s 0 0 0.00000 0 329 - 0.00000 - - 1s 0 0 0.00000 0 342 - 0.00000 - - 1s 0 0 0.00000 0 313 - 0.00000 - - 1s 0 0 0.00000 0 337 - 0.00000 - - 2s 0 0 0.00000 0 337 - 0.00000 - - 2s 0 2 0.00000 0 337 - 0.00000 - - 3s 418 22 0.00000 19 272 - 0.00000 - 82.4 5s 609 43 0.00000 14 276 - 0.00000 - 78.7 10s 615 47 0.00000 18 267 - 0.00000 - 77.9 15s 622 52 0.00000 21 320 - 0.00000 - 77.1 20s 1032 62 infeasible 32 - 0.00000 - 151 25s 1477 73 0.00000 30 208 - 0.00000 - 161 30s 1963 113 infeasible 28 - 0.00000 - 164 35s 2460 158 0.00000 35 194 - 0.00000 - 165 40s 2890 192 0.00000 32 269 - 0.00000 - 168 45s 3349 161 infeasible 39 - 0.00000 - 170 50s 3766 174 infeasible 31 - 0.00000 - 172 55s 4187 211 infeasible 31 - 0.00000 - 174 60s 4623 219 infeasible 34 - 0.00000 - 175 65s 5033 281 infeasible 36 - 0.00000 - 176 70s 5422 302 infeasible 35 - 0.00000 - 178 75s 5836 288 infeasible 32 - 0.00000 - 180 80s * 5977 0 28 0.0000000 0.00000 0.0% 180 81s Cutting planes: Clique: 5 Zero half: 5 Explored 5978 nodes (1092528 simplex iterations) in 81.49 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 22:38:37 2012 Optimize a model with 3197 rows, 1268 columns and 9716 nonzeros Presolve time: 0.01s Presolved: 3197 rows, 1268 columns, 9716 nonzeros Variable types: 0 continuous, 1268 integer (1268 binary) Root relaxation: objective 0.000000e+00, 285 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 0 246 - 0.00000 - - 0s 0 0 0.00000 0 250 - 0.00000 - - 0s 0 0 0.00000 0 385 - 0.00000 - - 0s 0 0 0.00000 0 378 - 0.00000 - - 1s 0 0 0.00000 0 371 - 0.00000 - - 1s 0 0 0.00000 0 366 - 0.00000 - - 1s 0 0 0.00000 0 364 - 0.00000 - - 2s 0 0 0.00000 0 369 - 0.00000 - - 2s 0 0 0.00000 0 364 - 0.00000 - - 3s 0 0 0.00000 0 361 - 0.00000 - - 4s 0 0 0.00000 0 361 - 0.00000 - - 4s 0 0 0.00000 0 361 - 0.00000 - - 5s 0 0 0.00000 0 361 - 0.00000 - - 5s 0 2 0.00000 0 361 - 0.00000 - - 6s Cutting planes: Clique: 14 Zero half: 27 Explored 17 nodes (28262 simplex iterations) in 6.98 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