current bounds on the number of colors: 0 -- 93 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:15 2012 Optimize a model with 9109 rows, 4474 columns and 31326 nonzeros Presolve removed 2 rows and 92 columns Presolve time: 0.06s Presolved: 9107 rows, 4382 columns, 31234 nonzeros Variable types: 0 continuous, 4382 integer (4382 binary) Root relaxation: objective 0.000000e+00, 210 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 (210 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 -- 46 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:15 2012 Optimize a model with 4601 rows, 2335 columns and 15663 nonzeros Presolve removed 2 rows and 46 columns Presolve time: 0.02s Presolved: 4599 rows, 2289 columns, 15617 nonzeros Variable types: 0 continuous, 2289 integer (2289 binary) Root relaxation: objective 0.000000e+00, 213 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 (353 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 -- 23 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:15 2012 Optimize a model with 2249 rows, 1219 columns and 7491 nonzeros Presolve removed 2 rows and 22 columns Presolve time: 0.01s Presolved: 2247 rows, 1197 columns, 7469 nonzeros Variable types: 0 continuous, 1197 integer (1197 binary) Root relaxation: objective 0.000000e+00, 207 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 (324 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:15 2012 Optimize a model with 1073 rows, 661 columns and 3405 nonzeros Presolve removed 2 rows and 10 columns Presolve time: 0.00s Presolved: 1071 rows, 651 columns, 3395 nonzeros Variable types: 0 continuous, 651 integer (651 binary) Root relaxation: objective 0.000000e+00, 228 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 (335 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 18:23:15 2012 Optimize a model with 485 rows, 382 columns and 1362 nonzeros Presolve removed 93 rows and 95 columns Presolve time: 0.00s Presolved: 392 rows, 287 columns, 1176 nonzeros Variable types: 0 continuous, 287 integer (287 binary) Root relaxation: objective 0.000000e+00, 98 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 91 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (374 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:15 2012 Optimize a model with 681 rows, 475 columns and 2043 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 679 rows, 469 columns, 2037 nonzeros Variable types: 0 continuous, 469 integer (469 binary) Root relaxation: objective 0.000000e+00, 264 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 65 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1004 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