current bounds on the number of colors: 0 -- 124 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:32:03 2012 Optimize a model with 26536 rows, 8114 columns and 86924 nonzeros Presolve removed 1 rows and 62 columns Presolve time: 0.13s Presolved: 26535 rows, 8052 columns, 86862 nonzeros Variable types: 0 continuous, 8052 integer (8052 binary) Root relaxation: objective 0.000000e+00, 393 iterations, 0.02 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 (617 simplex iterations) in 0.19 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 -- 62 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:32:03 2012 Optimize a model with 13330 rows, 4270 columns and 43462 nonzeros Presolve removed 1 rows and 31 columns Presolve time: 0.06s Presolved: 13329 rows, 4239 columns, 43431 nonzeros Variable types: 0 continuous, 4239 integer (4239 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 (524 simplex iterations) in 0.09 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 -- 31 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:32:04 2012 Optimize a model with 6514 rows, 2286 columns and 21030 nonzeros Presolve removed 1 rows and 15 columns Presolve time: 0.02s Presolved: 6513 rows, 2271 columns, 21015 nonzeros Variable types: 0 continuous, 2271 integer (2271 binary) Root relaxation: objective 0.000000e+00, 259 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 (464 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:32:04 2012 Optimize a model with 3106 rows, 1294 columns and 9814 nonzeros Presolve removed 1 rows and 7 columns Presolve time: 0.01s Presolved: 3105 rows, 1287 columns, 9807 nonzeros Variable types: 0 continuous, 1287 integer (1287 binary) Root relaxation: objective 0.000000e+00, 272 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 (536 simplex iterations) in 0.02 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:32:04 2012 Optimize a model with 1402 rows, 798 columns and 4206 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1401 rows, 795 columns, 4203 nonzeros Variable types: 0 continuous, 795 integer (795 binary) Root relaxation: objective 0.000000e+00, 299 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 0 246 - 0.00000 - - 0s 0 0 0.00000 0 245 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2464 simplex iterations) in 0.15 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:32:04 2012 Optimize a model with 2254 rows, 1046 columns and 7010 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.01s Presolved: 2253 rows, 1041 columns, 7005 nonzeros Variable types: 0 continuous, 1041 integer (1041 binary) Root relaxation: objective 0.000000e+00, 281 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 15 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (996 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:32:04 2012 Optimize a model with 1828 rows, 922 columns and 5608 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1827 rows, 918 columns, 5604 nonzeros Variable types: 0 continuous, 918 integer (918 binary) Root relaxation: objective 0.000000e+00, 273 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 0 130 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 5 Clique: 9 Zero half: 109 Explored 0 nodes (2529 simplex iterations) in 0.13 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