current bounds on the number of colors: 0 -- 88 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:27 2012 Optimize a model with 8536 rows, 4064 columns and 29216 nonzeros Presolve removed 3 rows and 132 columns Presolve time: 0.06s Presolved: 8533 rows, 3932 columns, 29084 nonzeros Variable types: 0 continuous, 3932 integer (3932 binary) Root relaxation: objective 0.000000e+00, 229 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 (357 simplex iterations) in 0.07 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 -- 44 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:27 2012 Optimize a model with 4312 rows, 2128 columns and 14608 nonzeros Presolve removed 3 rows and 66 columns Presolve time: 0.02s Presolved: 4309 rows, 2062 columns, 14542 nonzeros Variable types: 0 continuous, 2062 integer (2062 binary) Root relaxation: objective 0.000000e+00, 183 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 (321 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:28 2012 Optimize a model with 2200 rows, 1160 columns and 7304 nonzeros Presolve removed 3 rows and 33 columns Presolve time: 0.01s Presolved: 2197 rows, 1127 columns, 7271 nonzeros Variable types: 0 continuous, 1127 integer (1127 binary) Root relaxation: objective 0.000000e+00, 192 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 (324 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 Fri Dec 14 18:22:28 2012 Optimize a model with 1048 rows, 632 columns and 3320 nonzeros Presolve removed 3 rows and 15 columns Presolve time: 0.00s Presolved: 1045 rows, 617 columns, 3305 nonzeros Variable types: 0 continuous, 617 integer (617 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 (337 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 Fri Dec 14 18:22:28 2012 Optimize a model with 472 rows, 368 columns and 1328 nonzeros Presolve removed 88 rows and 91 columns Presolve time: 0.00s Presolved: 384 rows, 277 columns, 1152 nonzeros Variable types: 0 continuous, 277 integer (277 binary) Root relaxation: objective 0.000000e+00, 90 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 85 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (297 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:28 2012 Optimize a model with 664 rows, 456 columns and 1992 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 661 rows, 447 columns, 1983 nonzeros Variable types: 0 continuous, 447 integer (447 binary) Root relaxation: objective 0.000000e+00, 194 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 0 156 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 0 0.00000 0 162 - 0.00000 - - 0s 0 0 0.00000 0 139 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 0s 0 0 0.00000 0 158 - 0.00000 - - 0s 0 0 0.00000 0 158 - 0.00000 - - 0s 0 2 0.00000 0 124 - 0.00000 - - 0s Cutting planes: Zero half: 10 Explored 8 nodes (4005 simplex iterations) in 0.19 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:28 2012 Optimize a model with 856 rows, 544 columns and 2656 nonzeros Presolve removed 3 rows and 12 columns Presolve time: 0.00s Presolved: 853 rows, 532 columns, 2644 nonzeros Variable types: 0 continuous, 532 integer (532 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 (460 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% optimal solution found: number of colors: 4