current bounds on the number of colors: 0 -- 132 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:45 2012 Optimize a model with 31218 rows, 9183 columns and 101970 nonzeros Presolve time: 0.14s Presolved: 31218 rows, 9183 columns, 101970 nonzeros Variable types: 0 continuous, 9183 integer (9183 binary) Root relaxation: objective 0.000000e+00, 430 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 (693 simplex iterations) in 0.21 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 -- 66 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:46 2012 Optimize a model with 15675 rows, 4827 columns and 50985 nonzeros Presolve time: 0.08s Presolved: 15675 rows, 4827 columns, 50985 nonzeros Variable types: 0 continuous, 4827 integer (4827 binary) Root relaxation: objective 0.000000e+00, 335 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 (585 simplex iterations) in 0.11 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 -- 33 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:46 2012 Optimize a model with 7668 rows, 2583 columns and 24720 nonzeros Presolve time: 0.03s Presolved: 7668 rows, 2583 columns, 24720 nonzeros Variable types: 0 continuous, 2583 integer (2583 binary) Root relaxation: objective 0.000000e+00, 277 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 (497 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:46 2012 Optimize a model with 3900 rows, 1527 columns and 12360 nonzeros Presolve time: 0.01s Presolved: 3900 rows, 1527 columns, 12360 nonzeros Variable types: 0 continuous, 1527 integer (1527 binary) Root relaxation: objective 0.000000e+00, 292 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 (543 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:46 2012 Optimize a model with 2016 rows, 999 columns and 6180 nonzeros Presolve time: 0.01s Presolved: 2016 rows, 999 columns, 6180 nonzeros Variable types: 0 continuous, 999 integer (999 binary) Root relaxation: objective 0.000000e+00, 305 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 0 240 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (5370 simplex iterations) in 0.29 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 18:35:47 2012 Optimize a model with 1074 rows, 735 columns and 3090 nonzeros Presolve removed 132 rows and 132 columns Presolve time: 0.00s Presolved: 942 rows, 603 columns, 2826 nonzeros Variable types: 0 continuous, 603 integer (603 binary) Root relaxation: objective 0.000000e+00, 138 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 0 132 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (563 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 18:35:47 2012 Optimize a model with 1545 rows, 867 columns and 4635 nonzeros Presolve time: 0.00s Presolved: 1545 rows, 867 columns, 4635 nonzeros Variable types: 0 continuous, 867 integer (867 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 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 1s 0 0 0.00000 0 349 - 0.00000 - - 1s 0 0 0.00000 0 315 - 0.00000 - - 1s 0 0 0.00000 0 341 - 0.00000 - - 1s 0 0 0.00000 0 337 - 0.00000 - - 1s 0 2 0.00000 0 337 - 0.00000 - - 2s Cutting planes: Zero half: 21 Explored 3 nodes (19074 simplex iterations) in 2.05 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