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/********************* */
/*! \file command_executor.cpp
** \verbatim
** Original author: Morgan Deters
** Major contributors: Andrew Reynolds, Kshitij Bansal
** Minor contributors (to current version): none
** This file is part of the CVC4 project.
** Copyright (c) 2009-2014 New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief An additional layer between commands and invoking them.
**/
#include <iostream>
#include <string>
#include "main/command_executor.h"
#include "expr/command.h"
#include "main/main.h"
#include "main/options.h"
#include "smt/options.h"
#ifndef __WIN32__
# include <sys/resource.h>
#endif /* ! __WIN32__ */
namespace CVC4 {
namespace main {
// Function to cancel any (externally-imposed) limit on CPU time.
// This is used for competitions while a solution (proof or model)
// is being dumped (so that we don't give "sat" or "unsat" then get
// interrupted partway through outputting a proof!).
void setNoLimitCPU() {
// Windows doesn't have these things, just ignore
#ifndef __WIN32__
struct rlimit rlc;
int st = getrlimit(RLIMIT_CPU, &rlc);
if(st == 0) {
rlc.rlim_cur = rlc.rlim_max;
setrlimit(RLIMIT_CPU, &rlc);
}
#endif /* ! __WIN32__ */
}
void printStatsIncremental(std::ostream& out, const std::string& prvsStatsString, const std::string& curStatsString);
CommandExecutor::CommandExecutor(ExprManager &exprMgr, Options &options) :
d_exprMgr(exprMgr),
d_smtEngine(new SmtEngine(&exprMgr)),
d_options(options),
d_stats("driver"),
d_result() {
}
bool CommandExecutor::doCommand(Command* cmd)
{
if( d_options[options::parseOnly] ) {
return true;
}
CommandSequence *seq = dynamic_cast<CommandSequence*>(cmd);
if(seq != NULL) {
// assume no error
bool status = true;
for(CommandSequence::iterator subcmd = seq->begin();
(status || d_options[options::continuedExecution]) && subcmd != seq->end();
++subcmd) {
status = doCommand(*subcmd);
}
return status;
} else {
if(d_options[options::verbosity] > 2) {
*d_options[options::out] << "Invoking: " << *cmd << std::endl;
}
return doCommandSingleton(cmd);
}
}
void CommandExecutor::reset()
{
if(d_options[options::statistics]) {
flushStatistics(*d_options[options::err]);
}
delete d_smtEngine;
d_smtEngine = new SmtEngine(&d_exprMgr);
}
bool CommandExecutor::doCommandSingleton(Command* cmd)
{
bool status = true;
if(d_options[options::verbosity] >= -1) {
status = smtEngineInvoke(d_smtEngine, cmd, d_options[options::out]);
} else {
status = smtEngineInvoke(d_smtEngine, cmd, NULL);
}
Result res;
CheckSatCommand* cs = dynamic_cast<CheckSatCommand*>(cmd);
if(cs != NULL) {
d_result = res = cs->getResult();
}
QueryCommand* q = dynamic_cast<QueryCommand*>(cmd);
if(q != NULL) {
d_result = res = q->getResult();
}
if((cs != NULL || q != NULL) && d_options[options::statsEveryQuery]) {
std::ostringstream ossCurStats;
flushStatistics(ossCurStats);
printStatsIncremental(*d_options[options::err], d_lastStatistics, ossCurStats.str());
d_lastStatistics = ossCurStats.str();
}
// dump the model/proof if option is set
if(status) {
Command * g = NULL;
if( d_options[options::produceModels] &&
d_options[options::dumpModels] &&
( res.asSatisfiabilityResult() == Result::SAT ||
(res.isUnknown() && res.whyUnknown() == Result::INCOMPLETE) ) ) {
g = new GetModelCommand();
} else if( d_options[options::proof] &&
d_options[options::dumpProofs] &&
res.asSatisfiabilityResult() == Result::UNSAT ) {
g = new GetProofCommand();
} else if( d_options[options::dumpInstantiations] &&
res.asSatisfiabilityResult() == Result::UNSAT ) {
g = new GetInstantiationsCommand();
}
if( g ){
//set no time limit during dumping if applicable
if( d_options[options::forceNoLimitCpuWhileDump] ){
setNoLimitCPU();
}
status = doCommandSingleton(g);
}
}
return status;
}
bool smtEngineInvoke(SmtEngine* smt, Command* cmd, std::ostream *out)
{
if(out == NULL) {
cmd->invoke(smt);
} else {
cmd->invoke(smt, *out);
}
// ignore the error if the command-verbosity is 0 for this command
if(smt->getOption(std::string("command-verbosity:") + cmd->getCommandName()).getIntegerValue() == 0) {
return true;
}
return !cmd->fail();
}
void printStatsIncremental(std::ostream& out, const std::string& prvsStatsString, const std::string& curStatsString) {
if(prvsStatsString == "") {
out << curStatsString;
return;
}
// read each line
// if a number, subtract and add that to parantheses
std::istringstream issPrvs(prvsStatsString);
std::istringstream issCur(curStatsString);
std::string prvsStatName, prvsStatValue, curStatName, curStatValue;
std::getline(issPrvs, prvsStatName, ',');
std::getline(issCur, curStatName, ',');
/**
* Stat are assumed to one-per line: "<statName>, <statValue>"
* e.g. "sat::decisions, 100"
* Output is of the form: "<statName>, <statValue> (<statDiffFromPrvs>)"
* e.g. "sat::decisions, 100 (20)"
* If the value is not numeric, no change is made.
*/
while( !issCur.eof() ) {
std::getline(issCur, curStatValue, '\n');
if(curStatName == prvsStatName) {
std::getline(issPrvs, prvsStatValue, '\n');
double prvsFloat, curFloat;
bool isFloat =
(std::istringstream(prvsStatValue) >> prvsFloat) &&
(std::istringstream(curStatValue) >> curFloat);
if(isFloat) {
out << curStatName << ", " << curStatValue << " "
<< "(" << std::setprecision(8) << (curFloat-prvsFloat) << ")"
<< std::endl;
} else {
out << curStatName << ", " << curStatValue << std::endl;
}
std::getline(issPrvs, prvsStatName, ',');
} else {
out << curStatName << ", " << curStatValue << std::endl;
}
std::getline(issCur, curStatName, ',');
}
}
}/* CVC4::main namespace */
}/* CVC4 namespace */
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