current bounds on the number of colors: 0 -- 150 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:57 2012 Optimize a model with 9150 rows, 11370 columns and 38250 nonzeros Presolve removed 28 rows and 2100 columns Presolve time: 0.11s Presolved: 9122 rows, 9270 columns, 36150 nonzeros Variable types: 0 continuous, 9270 integer (9270 binary) Root relaxation: objective 0.000000e+00, 215 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 (215 simplex iterations) in 0.12 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 -- 75 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:57 2012 Optimize a model with 4590 rows, 5670 columns and 18870 nonzeros Presolve removed 28 rows and 1036 columns Presolve time: 0.04s Presolved: 4562 rows, 4634 columns, 17834 nonzeros Variable types: 0 continuous, 4634 integer (4634 binary) Root relaxation: objective 0.000000e+00, 215 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 (215 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 Sat Dec 15 16:19:57 2012 Optimize a model with 2310 rows, 2820 columns and 9180 nonzeros Presolve removed 28 rows and 504 columns Presolve time: 0.01s Presolved: 2282 rows, 2316 columns, 8676 nonzeros Variable types: 0 continuous, 2316 integer (2316 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 0.02 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 Sat Dec 15 16:19:57 2012 Optimize a model with 1230 rows, 1470 columns and 4590 nonzeros Presolve removed 28 rows and 252 columns Presolve time: 0.01s Presolved: 1202 rows, 1218 columns, 4338 nonzeros Variable types: 0 continuous, 1218 integer (1218 binary) Root relaxation: objective 0.000000e+00, 212 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 (212 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 16:19:57 2012 Optimize a model with 630 rows, 720 columns and 2040 nonzeros Presolve removed 28 rows and 112 columns Presolve time: 0.00s Presolved: 602 rows, 608 columns, 1928 nonzeros Variable types: 0 continuous, 608 integer (608 binary) Root relaxation: objective 0.000000e+00, 182 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 (182 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 16:19:57 2012 Optimize a model with 390 rows, 420 columns and 1020 nonzeros Presolve removed 156 rows and 187 columns Presolve time: 0.00s Presolved: 234 rows, 233 columns, 702 nonzeros Variable types: 0 continuous, 233 integer (233 binary) Root relaxation: objective 0.000000e+00, 122 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 0 101 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (416 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 16:19:57 2012 Optimize a model with 510 rows, 570 columns and 1530 nonzeros Presolve removed 28 rows and 84 columns Presolve time: 0.00s Presolved: 482 rows, 486 columns, 1446 nonzeros Variable types: 0 continuous, 486 integer (486 binary) Root relaxation: objective 0.000000e+00, 200 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 (200 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