current bounds on the number of colors: 0 -- 157 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:01 2012 Optimize a model with 11935 rows, 12397 columns and 47580 nonzeros Presolve removed 26 rows and 2028 columns Presolve time: 0.12s Presolved: 11909 rows, 10369 columns, 45552 nonzeros Variable types: 0 continuous, 10369 integer (10369 binary) Root relaxation: objective 0.000000e+00, 234 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 (234 simplex iterations) in 0.13 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 -- 78 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:02 2012 Optimize a model with 6046 rows, 6274 columns and 23790 nonzeros Presolve removed 26 rows and 1014 columns Presolve time: 0.05s Presolved: 6020 rows, 5260 columns, 22776 nonzeros Variable types: 0 continuous, 5260 integer (5260 binary) Root relaxation: objective 0.000000e+00, 238 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 0.05 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 -- 39 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:02 2012 Optimize a model with 3026 rows, 3134 columns and 11590 nonzeros Presolve removed 26 rows and 494 columns Presolve time: 0.02s Presolved: 3000 rows, 2640 columns, 11096 nonzeros Variable types: 0 continuous, 2640 integer (2640 binary) Root relaxation: objective 0.000000e+00, 232 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 (232 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 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:02 2012 Optimize a model with 1516 rows, 1564 columns and 5490 nonzeros Presolve removed 26 rows and 234 columns Presolve time: 0.01s Presolved: 1490 rows, 1330 columns, 5256 nonzeros Variable types: 0 continuous, 1330 integer (1330 binary) Root relaxation: objective 0.000000e+00, 235 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 (235 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 Sat Dec 15 16:21:02 2012 Optimize a model with 761 rows, 779 columns and 2440 nonzeros Presolve removed 26 rows and 104 columns Presolve time: 0.00s Presolved: 735 rows, 675 columns, 2336 nonzeros Variable types: 0 continuous, 675 integer (675 binary) Root relaxation: objective 0.000000e+00, 214 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 (214 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 Sat Dec 15 16:21:02 2012 Optimize a model with 459 rows, 465 columns and 1220 nonzeros Presolve removed 165 rows and 195 columns Presolve time: 0.00s Presolved: 294 rows, 270 columns, 882 nonzeros Variable types: 0 continuous, 270 integer (270 binary) Root relaxation: objective 0.000000e+00, 142 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 0 119 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (438 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 Sat Dec 15 16:21:02 2012 Optimize a model with 610 rows, 622 columns and 1830 nonzeros Presolve removed 26 rows and 78 columns Presolve time: 0.00s Presolved: 584 rows, 544 columns, 1752 nonzeros Variable types: 0 continuous, 544 integer (544 binary) Root relaxation: objective 0.000000e+00, 220 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 (220 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