current bounds on the number of colors: 0 -- 156 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:59:12 2012 Optimize a model with 46956 rows, 12768 columns and 152568 nonzeros Presolve time: 0.17s Presolved: 46956 rows, 12768 columns, 152568 nonzeros Variable types: 0 continuous, 12768 integer (12768 binary) Root relaxation: objective 0.000000e+00, 466 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 (753 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 -- 78 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:59:13 2012 Optimize a model with 23556 rows, 6684 columns and 76284 nonzeros Presolve time: 0.13s Presolved: 23556 rows, 6684 columns, 76284 nonzeros Variable types: 0 continuous, 6684 integer (6684 binary) Root relaxation: objective 0.000000e+00, 400 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 (697 simplex iterations) in 0.17 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:59:14 2012 Optimize a model with 11556 rows, 3564 columns and 37164 nonzeros Presolve time: 0.04s Presolved: 11556 rows, 3564 columns, 37164 nonzeros Variable types: 0 continuous, 3564 integer (3564 binary) Root relaxation: objective 0.000000e+00, 319 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 (584 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:59:14 2012 Optimize a model with 5556 rows, 2004 columns and 17604 nonzeros Presolve time: 0.02s Presolved: 5556 rows, 2004 columns, 17604 nonzeros Variable types: 0 continuous, 2004 integer (2004 binary) Root relaxation: objective 0.000000e+00, 334 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 (595 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 18:59:14 2012 Optimize a model with 2556 rows, 1224 columns and 7824 nonzeros Presolve time: 0.01s Presolved: 2556 rows, 1224 columns, 7824 nonzeros Variable types: 0 continuous, 1224 integer (1224 binary) Root relaxation: objective 0.000000e+00, 348 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 0 278 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 337 - 0.00000 - - 0s 0 0 0.00000 0 354 - 0.00000 - - 0s 0 0 0.00000 0 355 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 1s 0 0 0.00000 0 337 - 0.00000 - - 1s 0 0 0.00000 0 320 - 0.00000 - - 1s 0 0 0.00000 0 311 - 0.00000 - - 2s 0 0 0.00000 0 327 - 0.00000 - - 2s 0 0 0.00000 0 327 - 0.00000 - - 2s 0 2 0.00000 0 327 - 0.00000 - - 2s * 320 1 26 0.0000000 0.00000 0.0% 62.5 3s Cutting planes: Zero half: 24 Explored 321 nodes (44019 simplex iterations) in 3.67 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 18:59:18 2012 Optimize a model with 1356 rows, 912 columns and 3912 nonzeros Presolve removed 156 rows and 156 columns Presolve time: 0.00s Presolved: 1200 rows, 756 columns, 3600 nonzeros Variable types: 0 continuous, 756 integer (756 binary) Root relaxation: objective 0.000000e+00, 168 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 0 156 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (682 simplex iterations) in 0.02 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 18:59:18 2012 Optimize a model with 1956 rows, 1068 columns and 5868 nonzeros Presolve time: 0.00s Presolved: 1956 rows, 1068 columns, 5868 nonzeros Variable types: 0 continuous, 1068 integer (1068 binary) Root relaxation: objective 0.000000e+00, 365 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 313 - 0.00000 - - 0s 0 0 0.00000 0 395 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 29 Zero half: 308 Explored 0 nodes (6541 simplex iterations) in 0.60 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