current bounds on the number of colors: 0 -- 51 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:13 2012 Optimize a model with 15176 rows, 1880 columns and 46650 nonzeros Presolve time: 0.06s Presolved: 15176 rows, 1880 columns, 46650 nonzeros Variable types: 0 continuous, 1880 integer (1880 binary) Root relaxation: objective 0.000000e+00, 152 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 (327 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 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:13 2012 Optimize a model with 7311 rows, 1217 columns and 22392 nonzeros Presolve time: 0.02s Presolved: 7311 rows, 1217 columns, 22392 nonzeros Variable types: 0 continuous, 1217 integer (1217 binary) Root relaxation: objective 0.000000e+00, 110 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 (695 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:13 2012 Optimize a model with 3681 rows, 911 columns and 11196 nonzeros Presolve time: 0.01s Presolved: 3681 rows, 911 columns, 11196 nonzeros Variable types: 0 continuous, 911 integer (911 binary) Root relaxation: objective 0.000000e+00, 102 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 62 - 0.00000 - - 0s 0 0 0.00000 0 76 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2336 simplex iterations) in 0.31 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: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:14 2012 Optimize a model with 5496 rows, 1064 columns and 16794 nonzeros Presolve time: 0.01s Presolved: 5496 rows, 1064 columns, 16794 nonzeros Variable types: 0 continuous, 1064 integer (1064 binary) Root relaxation: objective 0.000000e+00, 110 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 49 - 0.00000 - - 0s 0 0 0.00000 0 84 - 0.00000 - - 0s 0 0 0.00000 0 32 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 50 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Clique: 21 Zero half: 20 Explored 0 nodes (12185 simplex iterations) in 1.52 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:15 2012 Optimize a model with 4286 rows, 962 columns and 13062 nonzeros Presolve time: 0.01s Presolved: 4286 rows, 962 columns, 13062 nonzeros Variable types: 0 continuous, 962 integer (962 binary) Root relaxation: objective 0.000000e+00, 102 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 52 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 1s 0 0 0.00000 0 247 - 0.00000 - - 2s 0 0 0.00000 0 273 - 0.00000 - - 3s 0 0 0.00000 0 273 - 0.00000 - - 3s 0 0 0.00000 0 259 - 0.00000 - - 4s 0 0 0.00000 0 263 - 0.00000 - - 5s 0 0 0.00000 0 254 - 0.00000 - - 6s 0 2 0.00000 0 254 - 0.00000 - - 6s Cutting planes: Clique: 32 Zero half: 15 Explored 3 nodes (34082 simplex iterations) in 6.45 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:16:22 2012 Optimize a model with 4891 rows, 1013 columns and 14928 nonzeros Presolve time: 0.01s Presolved: 4891 rows, 1013 columns, 14928 nonzeros Variable types: 0 continuous, 1013 integer (1013 binary) Root relaxation: objective 0.000000e+00, 104 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 72 - 0.00000 - - 0s 0 0 0.00000 0 41 - 0.00000 - - 0s 0 0 0.00000 0 142 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 132 - 0.00000 - - 1s 0 0 0.00000 0 135 - 0.00000 - - 1s 0 0 0.00000 0 147 - 0.00000 - - 2s 0 0 0.00000 0 143 - 0.00000 - - 2s 0 0 0.00000 0 159 - 0.00000 - - 3s 0 0 0.00000 0 158 - 0.00000 - - 3s 0 2 0.00000 0 156 - 0.00000 - - 4s 52 2 0.00000 8 175 - 0.00000 - 181 5s Cutting planes: Clique: 64 Zero half: 11 Explored 59 nodes (34144 simplex iterations) in 5.08 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9