current bounds on the number of colors: 0 -- 136 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:35 2012 Optimize a model with 31212 rows, 9705 columns and 102476 nonzeros Presolve time: 0.15s Presolved: 31212 rows, 9705 columns, 102476 nonzeros Variable types: 0 continuous, 9705 integer (9705 binary) Root relaxation: objective 0.000000e+00, 440 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 (703 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 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:35 2012 Optimize a model with 15674 rows, 5081 columns and 51238 nonzeros Presolve time: 0.08s Presolved: 15674 rows, 5081 columns, 51238 nonzeros Variable types: 0 continuous, 5081 integer (5081 binary) Root relaxation: objective 0.000000e+00, 384 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 (384 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 -- 34 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:36 2012 Optimize a model with 7905 rows, 2769 columns and 25619 nonzeros Presolve time: 0.03s Presolved: 7905 rows, 2769 columns, 25619 nonzeros Variable types: 0 continuous, 2769 integer (2769 binary) Root relaxation: objective 0.000000e+00, 282 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 (504 simplex iterations) in 0.05 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:36 2012 Optimize a model with 3792 rows, 1545 columns and 12056 nonzeros Presolve time: 0.01s Presolved: 3792 rows, 1545 columns, 12056 nonzeros Variable types: 0 continuous, 1545 integer (1545 binary) Root relaxation: objective 0.000000e+00, 291 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 (535 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 18:37:36 2012 Optimize a model with 1964 rows, 1001 columns and 6028 nonzeros Presolve time: 0.01s Presolved: 1964 rows, 1001 columns, 6028 nonzeros Variable types: 0 continuous, 1001 integer (1001 binary) Root relaxation: objective 0.000000e+00, 323 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 0 106 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1978 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:36 2012 Optimize a model with 1050 rows, 729 columns and 3014 nonzeros Presolve removed 136 rows and 136 columns Presolve time: 0.00s Presolved: 914 rows, 593 columns, 2742 nonzeros Variable types: 0 continuous, 593 integer (593 binary) Root relaxation: objective 0.000000e+00, 150 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 0 136 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (566 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 18:37:36 2012 Optimize a model with 1507 rows, 865 columns and 4521 nonzeros Presolve time: 0.00s Presolved: 1507 rows, 865 columns, 4521 nonzeros Variable types: 0 continuous, 865 integer (865 binary) Root relaxation: objective 0.000000e+00, 298 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 0 260 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 0s 0 0 0.00000 0 346 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 331 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 2 0.00000 0 352 - 0.00000 - - 1s Cutting planes: Zero half: 16 Explored 5 nodes (13226 simplex iterations) in 1.17 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