current bounds on the number of colors: 0 -- 145 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:55 2012 Optimize a model with 40969 rows, 11007 columns and 132912 nonzeros Presolve time: 0.16s Presolved: 40969 rows, 11007 columns, 132912 nonzeros Variable types: 0 continuous, 11007 integer (11007 binary) Root relaxation: objective 0.000000e+00, 531 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 (856 simplex iterations) in 0.25 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 -- 72 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:56 2012 Optimize a model with 20557 rows, 5787 columns and 66456 nonzeros Presolve time: 0.10s Presolved: 20557 rows, 5787 columns, 66456 nonzeros Variable types: 0 continuous, 5787 integer (5787 binary) Root relaxation: objective 0.000000e+00, 394 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 (694 simplex iterations) in 0.15 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% current bounds on the number of colors: 0 -- 36 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:56 2012 Optimize a model with 10351 rows, 3177 columns and 33228 nonzeros Presolve time: 0.04s Presolved: 10351 rows, 3177 columns, 33228 nonzeros Variable types: 0 continuous, 3177 integer (3177 binary) Root relaxation: objective 0.000000e+00, 295 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 (535 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:56 2012 Optimize a model with 5248 rows, 1872 columns and 16614 nonzeros Presolve time: 0.02s Presolved: 5248 rows, 1872 columns, 16614 nonzeros Variable types: 0 continuous, 1872 integer (1872 binary) Root relaxation: objective 0.000000e+00, 331 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 (721 simplex iterations) in 0.03 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:56 2012 Optimize a model with 2413 rows, 1147 columns and 7384 nonzeros Presolve time: 0.01s Presolved: 2413 rows, 1147 columns, 7384 nonzeros Variable types: 0 continuous, 1147 integer (1147 binary) Root relaxation: objective 0.000000e+00, 327 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 0 274 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 288 - 0.00000 - - 0s 0 0 0.00000 0 154 - 0.00000 - - 0s 0 0 0.00000 0 154 - 0.00000 - - 0s 0 0 0.00000 0 154 - 0.00000 - - 1s 0 0 0.00000 0 150 - 0.00000 - - 1s 0 2 0.00000 0 150 - 0.00000 - - 1s * 40 2 21 0.0000000 0.00000 0.0% 96.7 1s Cutting planes: Zero half: 7 Explored 41 nodes (20407 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: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:58 2012 Optimize a model with 1279 rows, 857 columns and 3692 nonzeros Presolve removed 145 rows and 145 columns Presolve time: 0.00s Presolved: 1134 rows, 712 columns, 3402 nonzeros Variable types: 0 continuous, 712 integer (712 binary) Root relaxation: objective 0.000000e+00, 154 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 0 145 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (597 simplex iterations) in 0.01 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:58 2012 Optimize a model with 1846 rows, 1002 columns and 5538 nonzeros Presolve time: 0.00s Presolved: 1846 rows, 1002 columns, 5538 nonzeros Variable types: 0 continuous, 1002 integer (1002 binary) Root relaxation: objective 0.000000e+00, 345 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 0 278 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 365 - 0.00000 - - 0s 0 0 0.00000 0 403 - 0.00000 - - 0s 0 0 0.00000 0 384 - 0.00000 - - 0s 0 0 0.00000 0 382 - 0.00000 - - 1s 0 0 0.00000 0 388 - 0.00000 - - 1s 0 0 0.00000 0 382 - 0.00000 - - 1s 0 0 0.00000 0 384 - 0.00000 - - 2s 0 0 0.00000 0 382 - 0.00000 - - 2s 0 0 0.00000 0 384 - 0.00000 - - 2s 0 0 0.00000 0 384 - 0.00000 - - 2s 0 2 0.00000 0 384 - 0.00000 - - 3s Cutting planes: Clique: 1 Zero half: 19 Explored 3 nodes (22302 simplex iterations) in 3.06 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4