current bounds on the number of colors: 0 -- 134 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:43 2012 Optimize a model with 32696 rows, 9464 columns and 106664 nonzeros Presolve time: 0.15s Presolved: 32696 rows, 9464 columns, 106664 nonzeros Variable types: 0 continuous, 9464 integer (9464 binary) Root relaxation: objective 0.000000e+00, 478 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 (759 simplex iterations) in 0.23 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 -- 67 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:43 2012 Optimize a model with 16172 rows, 4908 columns and 52536 nonzeros Presolve time: 0.08s Presolved: 16172 rows, 4908 columns, 52536 nonzeros Variable types: 0 continuous, 4908 integer (4908 binary) Root relaxation: objective 0.000000e+00, 324 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 (591 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 18:36:44 2012 Optimize a model with 7910 rows, 2630 columns and 25472 nonzeros Presolve time: 0.03s Presolved: 7910 rows, 2630 columns, 25472 nonzeros Variable types: 0 continuous, 2630 integer (2630 binary) Root relaxation: objective 0.000000e+00, 276 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 (485 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 18:36:44 2012 Optimize a model with 4022 rows, 1558 columns and 12736 nonzeros Presolve time: 0.01s Presolved: 4022 rows, 1558 columns, 12736 nonzeros Variable types: 0 continuous, 1558 integer (1558 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 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 18:36:44 2012 Optimize a model with 2078 rows, 1022 columns and 6368 nonzeros Presolve time: 0.01s Presolved: 2078 rows, 1022 columns, 6368 nonzeros Variable types: 0 continuous, 1022 integer (1022 binary) Root relaxation: objective 0.000000e+00, 313 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 0 238 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4671 simplex iterations) in 0.27 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 18:36:44 2012 Optimize a model with 1106 rows, 754 columns and 3184 nonzeros Presolve removed 134 rows and 134 columns Presolve time: 0.00s Presolved: 972 rows, 620 columns, 2916 nonzeros Variable types: 0 continuous, 620 integer (620 binary) Root relaxation: objective 0.000000e+00, 143 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 0 134 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (557 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 18:36:44 2012 Optimize a model with 1592 rows, 888 columns and 4776 nonzeros Presolve time: 0.00s Presolved: 1592 rows, 888 columns, 4776 nonzeros Variable types: 0 continuous, 888 integer (888 binary) Root relaxation: objective 0.000000e+00, 308 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 0 264 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 339 - 0.00000 - - 0s 0 0 0.00000 0 361 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 0.00000 0 254 - 0.00000 - - 1s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Zero half: 201 Explored 0 nodes (15855 simplex iterations) in 1.39 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