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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* */
/* This file is part of the class library */
/* SoPlex --- the Sequential object-oriented simPlex. */
/* */
/* Copyright 1996-2022 Zuse Institute Berlin */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* */
/* You should have received a copy of the Apache-2.0 license */
/* along with SoPlex; see the file LICENSE. If not email to soplex@zib.de. */
/* */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**@file validation.hpp
* @brief Validation object for soplex solutions
*/
namespace soplex
{
template <class R>
bool Validation<R>::updateExternalSolution(const std::string& solution)
{
validate = true;
validatesolution = solution;
if(solution == "+infinity")
{
return true;
}
else if(solution == "-infinity")
{
return true;
}
else
{
char* tailptr;
strtod(solution.c_str(), &tailptr);
if(*tailptr)
{
//conversion failed because the input wasn't a number
return false;
}
}
return true;
}
/// updates the tolerance used for validation
template <class R>
bool Validation<R>::updateValidationTolerance(const std::string& tolerance)
{
char* tailptr;
validatetolerance = strtod(tolerance.c_str(), &tailptr);
if(*tailptr)
{
//conversion failed because the input wasn't a number
return false;
}
return true;
}
template <class R>
void Validation<R>::validateSolveReal(SoPlexBase<R>& soplex)
{
bool passedValidation = true;
std::string reason = "";
R objViolation = 0.0;
R maxBoundViolation = 0.0;
R maxRowViolation = 0.0;
R maxRedCostViolation = 0.0;
R maxDualViolation = 0.0;
R sumBoundViolation = 0.0;
R sumRowViolation = 0.0;
R sumRedCostViolation = 0.0;
R sumDualViolation = 0.0;
R sol;
std::ostream& os = soplex.spxout.getStream(SPxOut::INFO1);
if(validatesolution == "+infinity")
{
sol = soplex.realParam(SoPlexBase<R>::INFTY);
}
else if(validatesolution == "-infinity")
{
sol = -soplex.realParam(SoPlexBase<R>::INFTY);
}
else
{
sol = atof(validatesolution.c_str());
}
objViolation = spxAbs(sol - soplex.objValueReal());
// skip check in case presolving detected infeasibility/unboundedness
if(SPxSolverBase<R>::INForUNBD == soplex.status() &&
(sol == soplex.realParam(SoPlexBase<R>::INFTY)
|| sol == -soplex.realParam(SoPlexBase<R>::INFTY)))
objViolation = 0.0;
if(! EQ(objViolation, R(0.0), validatetolerance))
{
passedValidation = false;
reason += "Objective Violation; ";
}
if(SPxSolverBase<R>::OPTIMAL == soplex.status())
{
soplex.getBoundViolation(maxBoundViolation, sumBoundViolation);
soplex.getRowViolation(maxRowViolation, sumRowViolation);
soplex.getRedCostViolation(maxRedCostViolation, sumRedCostViolation);
soplex.getDualViolation(maxDualViolation, sumDualViolation);
if(! LE(maxBoundViolation, validatetolerance))
{
passedValidation = false;
reason += "Bound Violation; ";
}
if(! LE(maxRowViolation, validatetolerance))
{
passedValidation = false;
reason += "Row Violation; ";
}
if(! LE(maxRedCostViolation, validatetolerance))
{
passedValidation = false;
reason += "Reduced Cost Violation; ";
}
if(! LE(maxDualViolation, validatetolerance))
{
passedValidation = false;
reason += "Dual Violation; ";
}
}
os << "\n";
os << "Validation :";
if(passedValidation)
os << " Success\n";
else
{
reason[reason.length() - 2] = ']';
os << " Fail [" + reason + "\n";
}
os << " Objective : " << std::scientific << std::setprecision(
8) << objViolation << std::fixed << "\n";
os << " Bound : " << std::scientific << std::setprecision(
8) << maxBoundViolation << std::fixed << "\n";
os << " Row : " << std::scientific << std::setprecision(
8) << maxRowViolation << std::fixed << "\n";
os << " Reduced Cost : " << std::scientific << std::setprecision(
8) << maxRedCostViolation << std::fixed << "\n";
os << " Dual : " << std::scientific << std::setprecision(
8) << maxDualViolation << std::fixed << "\n";
}
} // namespace soplex