current bounds on the number of colors: 0 -- 109 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:51 2012 Optimize a model with 31969 rows, 6476 columns and 101466 nonzeros Presolve time: 0.15s Presolved: 31969 rows, 6476 columns, 101466 nonzeros Variable types: 0 continuous, 6476 integer (6476 binary) Root relaxation: objective 0.000000e+00, 385 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 (667 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 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:52 2012 Optimize a model with 16039 rows, 3533 columns and 50733 nonzeros Presolve time: 0.07s Presolved: 16039 rows, 3533 columns, 50733 nonzeros Variable types: 0 continuous, 3533 integer (3533 binary) Root relaxation: objective 0.000000e+00, 258 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 (508 simplex iterations) in 0.10 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 20:01:52 2012 Optimize a model with 7779 rows, 2007 columns and 24427 nonzeros Presolve time: 0.02s Presolved: 7779 rows, 2007 columns, 24427 nonzeros Variable types: 0 continuous, 2007 integer (2007 binary) Root relaxation: objective 0.000000e+00, 219 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 (424 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 20:01:52 2012 Optimize a model with 3649 rows, 1244 columns and 11274 nonzeros Presolve time: 0.01s Presolved: 3649 rows, 1244 columns, 11274 nonzeros Variable types: 0 continuous, 1244 integer (1244 binary) Root relaxation: objective 0.000000e+00, 233 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 (1734 simplex iterations) in 0.10 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 20:01:52 2012 Optimize a model with 1879 rows, 917 columns and 5637 nonzeros Presolve time: 0.00s Presolved: 1879 rows, 917 columns, 5637 nonzeros Variable types: 0 continuous, 917 integer (917 binary) Root relaxation: objective 0.000000e+00, 250 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 0 214 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3117 simplex iterations) in 0.30 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 20:01:53 2012 Optimize a model with 2469 rows, 1026 columns and 7516 nonzeros Presolve time: 0.01s Presolved: 2469 rows, 1026 columns, 7516 nonzeros Variable types: 0 continuous, 1026 integer (1026 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 0 214 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 312 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 1s 0 0 0.00000 0 309 - 0.00000 - - 1s 0 0 0.00000 0 304 - 0.00000 - - 1s 0 0 0.00000 0 302 - 0.00000 - - 2s 0 0 0.00000 0 293 - 0.00000 - - 2s 0 0 0.00000 0 291 - 0.00000 - - 2s 0 0 0.00000 0 290 - 0.00000 - - 3s 0 0 0.00000 0 286 - 0.00000 - - 3s 0 0 0.00000 0 285 - 0.00000 - - 3s 0 0 0.00000 0 292 - 0.00000 - - 3s 0 0 0.00000 0 290 - 0.00000 - - 4s 0 0 0.00000 0 285 - 0.00000 - - 4s 0 0 0.00000 0 285 - 0.00000 - - 4s 0 0 0.00000 0 285 - 0.00000 - - 4s 0 2 0.00000 0 285 - 0.00000 - - 5s Cutting planes: Clique: 13 Zero half: 37 Explored 113 nodes (50284 simplex iterations) in 6.84 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 20:01:59 2012 Optimize a model with 3059 rows, 1135 columns and 9395 nonzeros Presolve time: 0.01s Presolved: 3059 rows, 1135 columns, 9395 nonzeros Variable types: 0 continuous, 1135 integer (1135 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 0 166 - 0.00000 - - 0s 0 0 0.00000 0 80 - 0.00000 - - 0s 0 0 0.00000 0 239 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 235 - 0.00000 - - 1s 0 0 0.00000 0 289 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 1 Zero half: 65 Explored 0 nodes (13874 simplex iterations) in 1.35 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