current bounds on the number of colors: 0 -- 66 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:31 2012 Optimize a model with 3135 rows, 2271 columns and 11385 nonzeros Presolve removed 1 rows and 33 columns Presolve time: 0.02s Presolved: 3134 rows, 2238 columns, 11352 nonzeros Variable types: 0 continuous, 2238 integer (2238 binary) Root relaxation: objective 0.000000e+00, 130 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 (130 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 -- 33 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:31 2012 Optimize a model with 1554 rows, 1149 columns and 5520 nonzeros Presolve removed 1 rows and 16 columns Presolve time: 0.01s Presolved: 1553 rows, 1133 columns, 5504 nonzeros Variable types: 0 continuous, 1133 integer (1133 binary) Root relaxation: objective 0.000000e+00, 126 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 (126 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:31 2012 Optimize a model with 810 rows, 621 columns and 2760 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.00s Presolved: 809 rows, 613 columns, 2752 nonzeros Variable types: 0 continuous, 613 integer (613 binary) Root relaxation: objective 0.000000e+00, 127 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 (127 simplex iterations) in 0.00 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 18:20:31 2012 Optimize a model with 438 rows, 357 columns and 1380 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 437 rows, 353 columns, 1376 nonzeros Variable types: 0 continuous, 353 integer (353 binary) Root relaxation: objective 0.000000e+00, 125 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 (198 simplex iterations) in 0.00 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 18:20:31 2012 Optimize a model with 252 rows, 225 columns and 690 nonzeros Presolve removed 66 rows and 67 columns Presolve time: 0.00s Presolved: 186 rows, 158 columns, 558 nonzeros Variable types: 0 continuous, 158 integer (158 binary) Root relaxation: objective 0.000000e+00, 68 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 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (228 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 18:20:31 2012 Optimize a model with 345 rows, 291 columns and 1035 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 344 rows, 288 columns, 1032 nonzeros Variable types: 0 continuous, 288 integer (288 binary) Root relaxation: objective 0.000000e+00, 138 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 (257 simplex iterations) in 0.00 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