current bounds on the number of colors: 0 -- 80 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:34 2012 Optimize a model with 7120 rows, 3376 columns and 24320 nonzeros Presolve time: 0.04s Presolved: 7120 rows, 3376 columns, 24320 nonzeros Variable types: 0 continuous, 3376 integer (3376 binary) Root relaxation: objective 0.000000e+00, 207 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 (333 simplex iterations) in 0.06 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:34 2012 Optimize a model with 3600 rows, 1776 columns and 12160 nonzeros Presolve time: 0.02s Presolved: 3600 rows, 1776 columns, 12160 nonzeros Variable types: 0 continuous, 1776 integer (1776 binary) Root relaxation: objective 0.000000e+00, 166 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 (291 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:34 2012 Optimize a model with 1840 rows, 976 columns and 6080 nonzeros Presolve time: 0.01s Presolved: 1840 rows, 976 columns, 6080 nonzeros Variable types: 0 continuous, 976 integer (976 binary) Root relaxation: objective 0.000000e+00, 183 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 (302 simplex iterations) in 0.01 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:35 2012 Optimize a model with 960 rows, 576 columns and 3040 nonzeros Presolve time: 0.00s Presolved: 960 rows, 576 columns, 3040 nonzeros Variable types: 0 continuous, 576 integer (576 binary) Root relaxation: objective 0.000000e+00, 201 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 (326 simplex iterations) in 0.01 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:35 2012 Optimize a model with 432 rows, 336 columns and 1216 nonzeros Presolve removed 80 rows and 80 columns Presolve time: 0.00s Presolved: 352 rows, 256 columns, 1056 nonzeros Variable types: 0 continuous, 256 integer (256 binary) Root relaxation: objective 0.000000e+00, 86 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 80 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (314 simplex iterations) in 0.00 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:35 2012 Optimize a model with 608 rows, 416 columns and 1824 nonzeros Presolve time: 0.00s Presolved: 608 rows, 416 columns, 1824 nonzeros Variable types: 0 continuous, 416 integer (416 binary) Root relaxation: objective 0.000000e+00, 195 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 95 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (847 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% optimal solution found: number of colors: 3