current bounds on the number of colors: 0 -- 75 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:07 2012 Optimize a model with 5884 rows, 2932 columns and 20202 nonzeros Presolve removed 2 rows and 74 columns Presolve time: 0.04s Presolved: 5882 rows, 2858 columns, 20128 nonzeros Variable types: 0 continuous, 2858 integer (2858 binary) Root relaxation: objective 0.000000e+00, 172 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 (172 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:07 2012 Optimize a model with 2901 rows, 1507 columns and 9828 nonzeros Presolve removed 2 rows and 36 columns Presolve time: 0.01s Presolved: 2899 rows, 1471 columns, 9792 nonzeros Variable types: 0 continuous, 1471 integer (1471 binary) Root relaxation: objective 0.000000e+00, 173 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 (301 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:07 2012 Optimize a model with 1488 rows, 832 columns and 4914 nonzeros Presolve removed 2 rows and 18 columns Presolve time: 0.01s Presolved: 1486 rows, 814 columns, 4896 nonzeros Variable types: 0 continuous, 814 integer (814 binary) Root relaxation: objective 0.000000e+00, 153 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 (238 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:07 2012 Optimize a model with 703 rows, 457 columns and 2184 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 701 rows, 449 columns, 2176 nonzeros Variable types: 0 continuous, 449 integer (449 binary) Root relaxation: objective 0.000000e+00, 188 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 (294 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:07 2012 Optimize a model with 389 rows, 307 columns and 1092 nonzeros Presolve removed 75 rows and 77 columns Presolve time: 0.00s Presolved: 314 rows, 230 columns, 942 nonzeros Variable types: 0 continuous, 230 integer (230 binary) Root relaxation: objective 0.000000e+00, 77 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 73 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (277 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:21:07 2012 Optimize a model with 546 rows, 382 columns and 1638 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 544 rows, 376 columns, 1632 nonzeros Variable types: 0 continuous, 376 integer (376 binary) Root relaxation: objective 0.000000e+00, 161 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 64 - 0.00000 - - 0s 0 0 0.00000 0 69 - 0.00000 - - 0s 0 0 0.00000 0 126 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1486 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% optimal solution found: number of colors: 3