current bounds on the number of colors: 0 -- 137 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:13 2012 Optimize a model with 6529 rows, 9410 columns and 28492 nonzeros Presolve removed 38 rows and 2584 columns Presolve time: 0.08s Presolved: 6491 rows, 6826 columns, 25908 nonzeros Variable types: 0 continuous, 6826 integer (6826 binary) Root relaxation: objective 0.000000e+00, 165 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 (165 simplex iterations) in 0.09 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 -- 68 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:13 2012 Optimize a model with 3333 rows, 4752 columns and 14246 nonzeros Presolve removed 38 rows and 1292 columns Presolve time: 0.03s Presolved: 3295 rows, 3460 columns, 12954 nonzeros Variable types: 0 continuous, 3460 integer (3460 binary) Root relaxation: objective 0.000000e+00, 165 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 (165 simplex iterations) in 0.03 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 -- 34 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:13 2012 Optimize a model with 1735 rows, 2423 columns and 7123 nonzeros Presolve removed 38 rows and 646 columns Presolve time: 0.01s Presolved: 1697 rows, 1777 columns, 6477 nonzeros Variable types: 0 continuous, 1777 integer (1777 binary) Root relaxation: objective 0.000000e+00, 165 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 (165 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:13 2012 Optimize a model with 889 rows, 1190 columns and 3352 nonzeros Presolve removed 38 rows and 304 columns Presolve time: 0.00s Presolved: 851 rows, 886 columns, 3048 nonzeros Variable types: 0 continuous, 886 integer (886 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 0.00 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 Sat Dec 15 16:18:13 2012 Optimize a model with 513 rows, 642 columns and 1676 nonzeros Presolve removed 38 rows and 152 columns Presolve time: 0.00s Presolved: 475 rows, 490 columns, 1524 nonzeros Variable types: 0 continuous, 490 integer (490 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 (138 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 16:18:13 2012 Optimize a model with 325 rows, 368 columns and 838 nonzeros Presolve removed 143 rows and 184 columns Presolve time: 0.00s Presolved: 182 rows, 184 columns, 546 nonzeros Variable types: 0 continuous, 184 integer (184 binary) Root relaxation: objective 0.000000e+00, 93 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 71 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (270 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 16:18:13 2012 Optimize a model with 419 rows, 505 columns and 1257 nonzeros Presolve removed 38 rows and 114 columns Presolve time: 0.00s Presolved: 381 rows, 391 columns, 1143 nonzeros Variable types: 0 continuous, 391 integer (391 binary) Root relaxation: objective 0.000000e+00, 146 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 (146 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