current bounds on the number of colors: 0 -- 109 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:01 2012 Optimize a model with 31915 rows, 6475 columns and 101304 nonzeros Presolve time: 0.15s Presolved: 31915 rows, 6475 columns, 101304 nonzeros Variable types: 0 continuous, 6475 integer (6475 binary) Root relaxation: objective 0.000000e+00, 387 iterations, 0.03 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 (662 simplex iterations) in 0.22 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 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:02 2012 Optimize a model with 16012 rows, 3532 columns and 50652 nonzeros Presolve time: 0.07s Presolved: 16012 rows, 3532 columns, 50652 nonzeros Variable types: 0 continuous, 3532 integer (3532 binary) Root relaxation: objective 0.000000e+00, 272 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 (488 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:02 2012 Optimize a model with 7766 rows, 2006 columns and 24388 nonzeros Presolve time: 0.02s Presolved: 7766 rows, 2006 columns, 24388 nonzeros Variable types: 0 continuous, 2006 integer (2006 binary) Root relaxation: objective 0.000000e+00, 223 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 (422 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:03 2012 Optimize a model with 3643 rows, 1243 columns and 11256 nonzeros Presolve time: 0.01s Presolved: 3643 rows, 1243 columns, 11256 nonzeros Variable types: 0 continuous, 1243 integer (1243 binary) Root relaxation: objective 0.000000e+00, 234 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 32 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1916 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:03 2012 Optimize a model with 1876 rows, 916 columns and 5628 nonzeros Presolve time: 0.00s Presolved: 1876 rows, 916 columns, 5628 nonzeros Variable types: 0 continuous, 916 integer (916 binary) Root relaxation: objective 0.000000e+00, 234 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 0 166 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3348 simplex iterations) in 0.30 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:03 2012 Optimize a model with 2465 rows, 1025 columns and 7504 nonzeros Presolve time: 0.01s Presolved: 2465 rows, 1025 columns, 7504 nonzeros Variable types: 0 continuous, 1025 integer (1025 binary) Root relaxation: objective 0.000000e+00, 244 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 0 216 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 225 - 0.00000 - - 0s 0 0 0.00000 0 303 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 302 - 0.00000 - - 1s 0 0 0.00000 0 261 - 0.00000 - - 1s 0 0 0.00000 0 287 - 0.00000 - - 2s 0 0 0.00000 0 287 - 0.00000 - - 2s 0 2 0.00000 0 287 - 0.00000 - - 2s Cutting planes: Clique: 7 Zero half: 43 Explored 252 nodes (52318 simplex iterations) in 4.80 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:08 2012 Optimize a model with 3054 rows, 1134 columns and 9380 nonzeros Presolve time: 0.01s Presolved: 3054 rows, 1134 columns, 9380 nonzeros Variable types: 0 continuous, 1134 integer (1134 binary) Root relaxation: objective 0.000000e+00, 238 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 0 157 - 0.00000 - - 0s 0 0 0.00000 0 161 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (6365 simplex iterations) in 0.55 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: 5