current bounds on the number of colors: 0 -- 115 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:22:09 2012 Optimize a model with 37507 rows, 7211 columns and 118731 nonzeros Presolve time: 0.15s Presolved: 37507 rows, 7211 columns, 118731 nonzeros Variable types: 0 continuous, 7211 integer (7211 binary) Root relaxation: objective 0.000000e+00, 296 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 (553 simplex iterations) in 0.24 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 -- 57 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:22:09 2012 Optimize a model with 18483 rows, 3876 columns and 58324 nonzeros Presolve time: 0.08s Presolved: 18483 rows, 3876 columns, 58324 nonzeros Variable types: 0 continuous, 3876 integer (3876 binary) Root relaxation: objective 0.000000e+00, 266 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 (486 simplex iterations) in 0.11 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 -- 28 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:22:10 2012 Optimize a model with 9299 rows, 2266 columns and 29162 nonzeros Presolve time: 0.03s Presolved: 9299 rows, 2266 columns, 29162 nonzeros Variable types: 0 continuous, 2266 integer (2266 binary) Root relaxation: objective 0.000000e+00, 237 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 (454 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:22:10 2012 Optimize a model with 4707 rows, 1461 columns and 14581 nonzeros Presolve time: 0.01s Presolved: 4707 rows, 1461 columns, 14581 nonzeros Variable types: 0 continuous, 1461 integer (1461 binary) Root relaxation: objective 0.000000e+00, 240 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 (837 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 20:22:10 2012 Optimize a model with 2083 rows, 1001 columns and 6249 nonzeros Presolve time: 0.01s Presolved: 2083 rows, 1001 columns, 6249 nonzeros Variable types: 0 continuous, 1001 integer (1001 binary) Root relaxation: objective 0.000000e+00, 247 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 0 230 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3406 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 20:22:10 2012 Optimize a model with 3395 rows, 1231 columns and 10415 nonzeros Presolve time: 0.01s Presolved: 3395 rows, 1231 columns, 10415 nonzeros Variable types: 0 continuous, 1231 integer (1231 binary) Root relaxation: objective 0.000000e+00, 236 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 0 214 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 0 0.00000 0 297 - 0.00000 - - 0s 0 0 0.00000 0 213 - 0.00000 - - 1s 0 0 0.00000 0 186 - 0.00000 - - 1s 0 0 0.00000 0 181 - 0.00000 - - 1s 0 0 0.00000 0 245 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 2s 0 0 0.00000 0 239 - 0.00000 - - 2s 0 0 0.00000 0 284 - 0.00000 - - 2s 0 0 0.00000 0 284 - 0.00000 - - 2s 0 2 0.00000 0 284 - 0.00000 - - 3s 611 121 0.00000 22 170 - 0.00000 - 61.5 5s 711 137 0.00000 15 267 - 0.00000 - 81.8 10s * 757 111 36 0.0000000 0.00000 0.0% 85.4 10s Cutting planes: Gomory: 2 Clique: 3 Zero half: 5 Explored 758 nodes (92062 simplex iterations) in 10.48 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 20:22:21 2012 Optimize a model with 2739 rows, 1116 columns and 8332 nonzeros Presolve time: 0.01s Presolved: 2739 rows, 1116 columns, 8332 nonzeros Variable types: 0 continuous, 1116 integer (1116 binary) Root relaxation: objective 0.000000e+00, 245 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 0 230 - 0.00000 - - 0s 0 0 0.00000 0 220 - 0.00000 - - 0s 0 0 0.00000 0 351 - 0.00000 - - 0s 0 0 0.00000 0 343 - 0.00000 - - 0s 0 0 0.00000 0 329 - 0.00000 - - 0s 0 0 0.00000 0 327 - 0.00000 - - 1s 0 0 0.00000 0 319 - 0.00000 - - 1s 0 0 0.00000 0 328 - 0.00000 - - 1s 0 0 0.00000 0 325 - 0.00000 - - 1s 0 0 0.00000 0 318 - 0.00000 - - 2s 0 0 0.00000 0 320 - 0.00000 - - 2s 0 0 0.00000 0 324 - 0.00000 - - 3s 0 0 0.00000 0 317 - 0.00000 - - 4s 0 0 0.00000 0 312 - 0.00000 - - 4s 0 0 0.00000 0 308 - 0.00000 - - 4s 0 0 0.00000 0 307 - 0.00000 - - 5s 0 0 0.00000 0 326 - 0.00000 - - 5s 0 0 0.00000 0 326 - 0.00000 - - 5s 0 2 0.00000 0 326 - 0.00000 - - 6s Cutting planes: Clique: 12 Zero half: 37 Explored 41 nodes (40004 simplex iterations) in 7.27 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