current bounds on the number of colors: 0 -- 110 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:04:38 2012 Optimize a model with 36850 rows, 6718 columns and 116270 nonzeros Presolve time: 0.15s Presolved: 36850 rows, 6718 columns, 116270 nonzeros Variable types: 0 continuous, 6718 integer (6718 binary) Root relaxation: objective 0.000000e+00, 263 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 (520 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 -- 55 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:04:39 2012 Optimize a model with 18146 rows, 3638 columns and 57078 nonzeros Presolve time: 0.07s Presolved: 18146 rows, 3638 columns, 57078 nonzeros Variable types: 0 continuous, 3638 integer (3638 binary) Root relaxation: objective 0.000000e+00, 243 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 (532 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:04:39 2012 Optimize a model with 8794 rows, 2098 columns and 27482 nonzeros Presolve time: 0.03s Presolved: 8794 rows, 2098 columns, 27482 nonzeros Variable types: 0 continuous, 2098 integer (2098 binary) Root relaxation: objective 0.000000e+00, 222 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 (422 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:04:39 2012 Optimize a model with 4118 rows, 1328 columns and 12684 nonzeros Presolve time: 0.01s Presolved: 4118 rows, 1328 columns, 12684 nonzeros Variable types: 0 continuous, 1328 integer (1328 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3350 simplex iterations) in 0.23 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 20:04:39 2012 Optimize a model with 2114 rows, 998 columns and 6342 nonzeros Presolve time: 0.01s Presolved: 2114 rows, 998 columns, 6342 nonzeros Variable types: 0 continuous, 998 integer (998 binary) Root relaxation: objective 0.000000e+00, 248 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 0 218 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Clique: 292 Zero half: 379 Explored 0 nodes (1448 simplex iterations) in 0.12 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 20:04:40 2012 Optimize a model with 2782 rows, 1108 columns and 8456 nonzeros Presolve time: 0.01s Presolved: 2782 rows, 1108 columns, 8456 nonzeros Variable types: 0 continuous, 1108 integer (1108 binary) Root relaxation: objective 0.000000e+00, 232 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 0 218 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 0.00000 0 347 - 0.00000 - - 1s 0 0 0.00000 0 326 - 0.00000 - - 2s 0 0 0.00000 0 330 - 0.00000 - - 2s 0 0 0.00000 0 325 - 0.00000 - - 3s 0 0 0.00000 0 330 - 0.00000 - - 3s 0 0 0.00000 0 329 - 0.00000 - - 4s 0 0 0.00000 0 327 - 0.00000 - - 5s 0 0 0.00000 0 324 - 0.00000 - - 6s 0 0 0.00000 0 322 - 0.00000 - - 6s 0 0 0.00000 0 315 - 0.00000 - - 6s 0 0 0.00000 0 312 - 0.00000 - - 7s 0 0 0.00000 0 311 - 0.00000 - - 7s 0 0 0.00000 0 309 - 0.00000 - - 8s 0 0 0.00000 0 308 - 0.00000 - - 8s 0 0 0.00000 0 309 - 0.00000 - - 8s 0 0 0.00000 0 309 - 0.00000 - - 9s 0 2 0.00000 0 309 - 0.00000 - - 9s 11 3 0.00000 3 313 - 0.00000 - 379 10s Cutting planes: Clique: 10 Zero half: 22 Explored 21 nodes (48964 simplex iterations) in 10.21 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 20:04:50 2012 Optimize a model with 3450 rows, 1218 columns and 10570 nonzeros Presolve time: 0.01s Presolved: 3450 rows, 1218 columns, 10570 nonzeros Variable types: 0 continuous, 1218 integer (1218 binary) Root relaxation: objective 0.000000e+00, 234 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 0 190 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 172 - 0.00000 - - 1s 0 0 0.00000 0 179 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 1s 0 0 0.00000 0 230 - 0.00000 - - 2s 0 0 0.00000 0 275 - 0.00000 - - 2s 0 0 0.00000 0 275 - 0.00000 - - 2s 0 2 0.00000 0 275 - 0.00000 - - 3s 416 47 0.00000 18 200 - 0.00000 - 88.9 5s 609 73 0.00000 15 202 - 0.00000 - 82.6 10s 660 83 infeasible 31 - 0.00000 - 129 15s 1133 46 infeasible 35 - 0.00000 - 145 20s 1587 52 infeasible 32 - 0.00000 - 154 25s 1989 24 0.00000 28 229 - 0.00000 - 162 30s * 2219 1 29 0.0000000 0.00000 0.0% 166 33s Cutting planes: Gomory: 1 Clique: 1 Zero half: 5 Explored 2220 nodes (393911 simplex iterations) in 33.15 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