current bounds on the number of colors: 0 -- 185 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:26:17 2012 Optimize a model with 15365 rows, 17185 columns and 62560 nonzeros Presolve removed 35 rows and 3220 columns Presolve time: 0.12s Presolved: 15330 rows, 13965 columns, 59340 nonzeros Variable types: 0 continuous, 13965 integer (13965 binary) Root relaxation: objective 0.000000e+00, 268 iterations, 0.01 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 (268 simplex iterations) in 0.14 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 -- 92 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:26:18 2012 Optimize a model with 7775 rows, 8675 columns and 31280 nonzeros Presolve removed 35 rows and 1610 columns Presolve time: 0.07s Presolved: 7740 rows, 7065 columns, 29670 nonzeros Variable types: 0 continuous, 7065 integer (7065 binary) Root relaxation: objective 0.000000e+00, 270 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 (270 simplex iterations) in 0.08 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 -- 46 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:26:18 2012 Optimize a model with 3980 rows, 4420 columns and 15640 nonzeros Presolve removed 35 rows and 805 columns Presolve time: 0.02s Presolved: 3945 rows, 3615 columns, 14835 nonzeros Variable types: 0 continuous, 3615 integer (3615 binary) Root relaxation: objective 0.000000e+00, 272 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 (272 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 -- 23 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:26:18 2012 Optimize a model with 2000 rows, 2200 columns and 7480 nonzeros Presolve removed 35 rows and 385 columns Presolve time: 0.01s Presolved: 1965 rows, 1815 columns, 7095 nonzeros Variable types: 0 continuous, 1815 integer (1815 binary) Root relaxation: objective 0.000000e+00, 275 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 (401 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:26:18 2012 Optimize a model with 1010 rows, 1090 columns and 3400 nonzeros Presolve removed 35 rows and 175 columns Presolve time: 0.00s Presolved: 975 rows, 915 columns, 3225 nonzeros Variable types: 0 continuous, 915 integer (915 binary) Root relaxation: objective 0.000000e+00, 260 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 (260 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:26:18 2012 Optimize a model with 515 rows, 535 columns and 1360 nonzeros Presolve removed 195 rows and 235 columns Presolve time: 0.00s Presolved: 320 rows, 300 columns, 960 nonzeros Variable types: 0 continuous, 300 integer (300 binary) Root relaxation: objective 0.000000e+00, 155 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 0 137 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (473 simplex iterations) in 0.01 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:26:18 2012 Optimize a model with 680 rows, 720 columns and 2040 nonzeros Presolve removed 35 rows and 105 columns Presolve time: 0.00s Presolved: 645 rows, 615 columns, 1935 nonzeros Variable types: 0 continuous, 615 integer (615 binary) Root relaxation: objective 0.000000e+00, 251 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 (251 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