current bounds on the number of colors: 0 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:39 2012 Optimize a model with 3740 rows, 2420 columns and 13328 nonzeros Presolve removed 4 rows and 136 columns Presolve time: 0.02s Presolved: 3736 rows, 2284 columns, 13192 nonzeros Variable types: 0 continuous, 2284 integer (2284 binary) Root relaxation: objective 0.000000e+00, 143 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 (143 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 Fri Dec 14 18:20:39 2012 Optimize a model with 1904 rows, 1264 columns and 6664 nonzeros Presolve removed 4 rows and 68 columns Presolve time: 0.01s Presolved: 1900 rows, 1196 columns, 6596 nonzeros Variable types: 0 continuous, 1196 integer (1196 binary) Root relaxation: objective 0.000000e+00, 140 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 (242 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 Fri Dec 14 18:20:39 2012 Optimize a model with 932 rows, 652 columns and 3136 nonzeros Presolve removed 4 rows and 32 columns Presolve time: 0.00s Presolved: 928 rows, 620 columns, 3104 nonzeros Variable types: 0 continuous, 620 integer (620 binary) Root relaxation: objective 0.000000e+00, 133 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 (205 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:39 2012 Optimize a model with 500 rows, 380 columns and 1568 nonzeros Presolve removed 4 rows and 16 columns Presolve time: 0.00s Presolved: 496 rows, 364 columns, 1552 nonzeros Variable types: 0 continuous, 364 integer (364 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 (186 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 18:20:39 2012 Optimize a model with 284 rows, 244 columns and 784 nonzeros Presolve removed 68 rows and 72 columns Presolve time: 0.00s Presolved: 216 rows, 172 columns, 648 nonzeros Variable types: 0 continuous, 172 integer (172 binary) Root relaxation: objective 0.000000e+00, 66 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 64 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (233 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 18:20:39 2012 Optimize a model with 392 rows, 312 columns and 1176 nonzeros Presolve removed 4 rows and 12 columns Presolve time: 0.00s Presolved: 388 rows, 300 columns, 1164 nonzeros Variable types: 0 continuous, 300 integer (300 binary) Root relaxation: objective 0.000000e+00, 136 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 (306 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