Resource Times:

Date / Time: 08/24/07 21:51:48


See the solver return definitions for optimal/feasible model and solve statuses. Solutions are not checked for how close they are to eachother. Resource times are considered the same, if they are within 10% of eachother. A solver is considered faster than another, if it is less than 50% faster than the other. A solver is considered much faster than another, if it is more than 50% faster than the other.

If a model was not solved optimal/feasible by both solvers, the resource time is considered the same. If a model was solved optimal/feasible by solver A but not by solver B, then solver A is considered infinitely faster than solver B. Similarly, if one solver has trace data and the other has no data, then the first solver is consideredinfinitely faster.

A solver is considered to have a better objective function value, if the relative objective value difference is greater than 1.00E-05 For objective values below 1e-1 we use absolute differences.

Tracefile 1 :3-SBB-3.trc.convex
Tracefile 2 :4-SBB-4.trc.convex
Solvers used : SBB-IPOPT-WS
SBB-CONOPT-IPOPT
Modeltype(s)   MINLP
Threshold: Solver Faster 10%
Threshold: Solver Much Faster 50%
Threshold: Solver Infinitely Faster Other solver failed


Total Obj SBB-IPOPT-WS better Obj same Obj SBB-CONOPT-IPOPT better
Solver SBB-IPOPT-WS infinitely faster :- - - -
Solver SBB-IPOPT-WS much faster : 1 1 - -
Solver SBB-IPOPT-WS faster : 2 1 - 1
Solvers perform the same : 9 - 9 -
Solver SBB-CONOPT-IPOPT faster : 11 1 9 1
Solver SBB-CONOPT-IPOPT much faster : 12 2 10 -
Solver SBB-CONOPT-IPOPT infinitely faster :- - - -
Both solvers failed to solve optimally : 5 - 5 -
Total models: : 405332




Solver return definition:

OutcomeModel StatusSolver Status
globally optimal 1 or 15 1
locally optimal/feasible 2 or 8 or 16 1 or 2 or 3 or 4 or 5




Resource Times:

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Solver SBB-IPOPT-WS much faster - Obj of SBB-IPOPT-WS better:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
stockcycle49.290098.60000.500 1.19948688E+05 1.43295165E+05

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Solver SBB-IPOPT-WS faster - Obj of SBB-IPOPT-WS better:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
m6248.8800351.48000.708 8.22568769E+01 1.29824936E+02

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Solver SBB-IPOPT-WS faster - Obj of SBB-CONOPT-IPOPT better:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
m7357.2400425.16000.840 1.44505315E+02 1.23964378E+02

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Solvers perform the same - Obj same for both solvers:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
ex1223a0.09000.0100--- 4.57958240E+00 4.57958240E+00
gbd0.03000.0000--- 2.20000000E+00 2.20000000E+00
nvs100.05000.0100--- -3.10800000E+02 -3.10800000E+02
st_miqp30.03000.0000--- -6.00000000E+00 -6.00000000E+00
st_miqp40.06000.0000--- -4.57400000E+03 -4.57400000E+03
st_miqp50.02000.0000--- -3.33888889E+02 -3.33888889E+02
st_test80.05000.0100--- -2.96050000E+04 -2.96050000E+04
st_testph40.07000.0200--- -8.05000000E+01 -8.05000000E+01
synthes10.10000.0100--- 6.00975891E+00 6.00975891E+00

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Solver SBB-CONOPT-IPOPT faster - Obj of SBB-IPOPT-WS better:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
meanvarx0.27000.0100--- 1.44040623E+01 1.44969830E+01

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Solver SBB-CONOPT-IPOPT faster - Obj same for both solvers:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
alan0.18000.0400--- 2.92500000E+00 2.92500000E+00
ex12230.18000.0400--- 4.57958240E+00 4.57958240E+00
ex1223b0.16000.0300--- 4.57958240E+00 4.57958240E+00
fac10.42000.0200--- 1.60912612E+08 1.60912612E+08
m31.99001.17001.701 3.78000000E+01 3.78000000E+01
st_e140.18000.0400--- 4.57958240E+00 4.57958240E+00
st_miqp10.13000.0100--- 2.81000000E+02 2.81000000E+02
st_miqp20.27000.0100--- 2.00000000E+00 2.00000000E+00
st_testgr10.28000.0300--- -1.27281000E+01 -1.27281000E+01

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Solver SBB-CONOPT-IPOPT faster - Obj of SBB-CONOPT-IPOPT better:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
du-opt2.76001.73001.595 3.56468638E+00 3.56108965E+00

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Solver SBB-CONOPT-IPOPT much faster - Obj of SBB-IPOPT-WS better:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
st_e352.72000.0100--- 6.48680768E+04 1.17178934E+05
st_testgr33.15000.0300--- -2.05274000E+01 -2.04688000E+01

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Solver SBB-CONOPT-IPOPT much faster - Obj same for both solvers:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
batch1.76000.72002.444 2.85506508E+05 2.85506508E+05
du-opt546.440020.82002.231 8.07365758E+00 8.07365758E+00
fac318.32000.190096.421 3.19823098E+07 3.19823098E+07
nvs030.13000.05002.600 1.60000000E+01 1.60000000E+01
risk2b37.99000.3700102.676 -5.57361685E+01 -5.57361685E+01
risk2bpb5.35000.430012.442 -5.57361685E+01 -5.57361685E+01
st_test50.71000.0400--- -1.10000000E+02 -1.10000000E+02
st_test60.74000.11006.727 4.71000000E+02 4.71000000E+02
synthes20.66000.08008.250 7.30353126E+01 7.30353125E+01
synthes33.43000.160021.438 6.80097407E+01 6.80097405E+01

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Both solvers failed to solve optimally - Obj same for both solvers:

Modelname Time (SBB-IPOPT-WS) Time (SBB-CONOPT-IPOPT) Ratio (SBB-IPOPT-WS / SBB-CONOPT-IPOPT) Obj (SBB-IPOPT-WS) Obj (SBB-CONOPT-IPOPT)
fo7fail fail -- 0.00000000E+00 0.00000000E+00
o7fail fail -- 0.00000000E+00 0.00000000E+00
tls12fail fail -- 0.00000000E+00 0.00000000E+00
tls6fail fail -- 0.00000000E+00 0.00000000E+00
tls7fail fail -- 0.00000000E+00 0.00000000E+00

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