current bounds on the number of colors: 0 -- 145 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:49 2012 Optimize a model with 41401 rows, 11013 columns and 134208 nonzeros Presolve time: 0.16s Presolved: 41401 rows, 11013 columns, 134208 nonzeros Variable types: 0 continuous, 11013 integer (11013 binary) Root relaxation: objective 0.000000e+00, 530 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 (836 simplex iterations) in 0.26 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 18:42:49 2012 Optimize a model with 20773 rows, 5793 columns and 67104 nonzeros Presolve time: 0.10s Presolved: 20773 rows, 5793 columns, 67104 nonzeros Variable types: 0 continuous, 5793 integer (5793 binary) Root relaxation: objective 0.000000e+00, 369 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 (635 simplex iterations) in 0.14 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 18:42:50 2012 Optimize a model with 10459 rows, 3183 columns and 33552 nonzeros Presolve time: 0.04s Presolved: 10459 rows, 3183 columns, 33552 nonzeros Variable types: 0 continuous, 3183 integer (3183 binary) Root relaxation: objective 0.000000e+00, 305 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 (578 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:50 2012 Optimize a model with 5302 rows, 1878 columns and 16776 nonzeros Presolve time: 0.02s Presolved: 5302 rows, 1878 columns, 16776 nonzeros Variable types: 0 continuous, 1878 integer (1878 binary) Root relaxation: objective 0.000000e+00, 304 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 (565 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 18:42:50 2012 Optimize a model with 2437 rows, 1153 columns and 7456 nonzeros Presolve time: 0.01s Presolved: 2437 rows, 1153 columns, 7456 nonzeros Variable types: 0 continuous, 1153 integer (1153 binary) Root relaxation: objective 0.000000e+00, 334 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 0 220 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 230 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 1s 0 0 0.00000 0 186 - 0.00000 - - 1s 0 0 0.00000 0 188 - 0.00000 - - 1s 0 0 0.00000 0 194 - 0.00000 - - 1s 0 0 0.00000 0 176 - 0.00000 - - 1s 0 0 0.00000 0 166 - 0.00000 - - 1s 0 0 0.00000 0 185 - 0.00000 - - 1s 0 0 0.00000 0 210 - 0.00000 - - 1s 0 0 0.00000 0 210 - 0.00000 - - 2s 0 2 0.00000 0 210 - 0.00000 - - 2s * 369 5 33 0.0000000 0.00000 0.0% 69.3 3s Cutting planes: Zero half: 12 Explored 370 nodes (52641 simplex iterations) in 3.24 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:42:53 2012 Optimize a model with 1291 rows, 863 columns and 3728 nonzeros Presolve removed 145 rows and 145 columns Presolve time: 0.00s Presolved: 1146 rows, 718 columns, 3438 nonzeros Variable types: 0 continuous, 718 integer (718 binary) Root relaxation: objective 0.000000e+00, 152 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 Explored 0 nodes (588 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 18:42:53 2012 Optimize a model with 1864 rows, 1008 columns and 5592 nonzeros Presolve time: 0.00s Presolved: 1864 rows, 1008 columns, 5592 nonzeros Variable types: 0 continuous, 1008 integer (1008 binary) Root relaxation: objective 0.000000e+00, 323 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 0 288 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 340 - 0.00000 - - 0s 0 0 0.00000 0 394 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Zero half: 322 Explored 0 nodes (5566 simplex iterations) in 0.59 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4