current bounds on the number of colors: 0 -- 93 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:18 2012 Optimize a model with 10581 rows, 4506 columns and 35742 nonzeros Presolve removed 1 rows and 46 columns Presolve time: 0.07s Presolved: 10580 rows, 4460 columns, 35696 nonzeros Variable types: 0 continuous, 4460 integer (4460 binary) Root relaxation: objective 0.000000e+00, 226 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 (226 simplex iterations) in 0.08 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 -- 46 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:18 2012 Optimize a model with 5337 rows, 2367 columns and 17871 nonzeros Presolve removed 1 rows and 23 columns Presolve time: 0.02s Presolved: 5336 rows, 2344 columns, 17848 nonzeros Variable types: 0 continuous, 2344 integer (2344 binary) Root relaxation: objective 0.000000e+00, 206 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 (349 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 -- 23 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:18 2012 Optimize a model with 2601 rows, 1251 columns and 8547 nonzeros Presolve removed 1 rows and 11 columns Presolve time: 0.01s Presolved: 2600 rows, 1240 columns, 8536 nonzeros Variable types: 0 continuous, 1240 integer (1240 binary) Root relaxation: objective 0.000000e+00, 193 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 (322 simplex iterations) in 0.01 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:18 2012 Optimize a model with 1233 rows, 693 columns and 3885 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1232 rows, 688 columns, 3880 nonzeros Variable types: 0 continuous, 688 integer (688 binary) Root relaxation: objective 0.000000e+00, 226 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 (379 simplex iterations) in 0.01 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:18 2012 Optimize a model with 549 rows, 414 columns and 1554 nonzeros Presolve removed 93 rows and 94 columns Presolve time: 0.00s Presolved: 456 rows, 320 columns, 1368 nonzeros Variable types: 0 continuous, 320 integer (320 binary) Root relaxation: objective 0.000000e+00, 99 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 92 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (385 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:18 2012 Optimize a model with 777 rows, 507 columns and 2331 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 776 rows, 504 columns, 2328 nonzeros Variable types: 0 continuous, 504 integer (504 binary) Root relaxation: objective 0.000000e+00, 212 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 0 178 - 0.00000 - - 0s 0 0 0.00000 0 168 - 0.00000 - - 0s 0 0 0.00000 0 166 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 171 - 0.00000 - - 0s 0 0 0.00000 0 166 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 0.00000 0 205 - 0.00000 - - 0s 0 2 0.00000 0 201 - 0.00000 - - 0s Cutting planes: Zero half: 20 Explored 15 nodes (8026 simplex iterations) in 0.45 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:18 2012 Optimize a model with 1005 rows, 600 columns and 3108 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1004 rows, 596 columns, 3104 nonzeros Variable types: 0 continuous, 596 integer (596 binary) Root relaxation: objective 0.000000e+00, 211 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 (374 simplex iterations) in 0.01 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: 4