./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 22:04:04,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 22:04:04,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 22:04:05,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 22:04:05,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 22:04:05,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 22:04:05,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 22:04:05,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 22:04:05,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 22:04:05,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 22:04:05,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 22:04:05,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 22:04:05,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 22:04:05,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 22:04:05,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 22:04:05,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 22:04:05,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 22:04:05,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 22:04:05,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 22:04:05,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 22:04:05,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 22:04:05,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 22:04:05,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 22:04:05,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 22:04:05,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 22:04:05,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 22:04:05,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 22:04:05,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 22:04:05,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 22:04:05,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 22:04:05,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 22:04:05,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 22:04:05,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 22:04:05,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 22:04:05,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 22:04:05,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 22:04:05,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 22:04:05,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 22:04:05,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 22:04:05,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 22:04:05,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 22:04:05,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 22:04:05,066 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 22:04:05,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 22:04:05,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 22:04:05,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 22:04:05,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 22:04:05,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 22:04:05,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 22:04:05,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 22:04:05,069 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 22:04:05,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 22:04:05,070 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 22:04:05,070 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 22:04:05,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 22:04:05,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 22:04:05,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 22:04:05,071 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 22:04:05,071 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 22:04:05,071 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 22:04:05,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 22:04:05,072 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 22:04:05,072 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 22:04:05,072 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 22:04:05,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 22:04:05,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 22:04:05,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 22:04:05,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:04:05,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 22:04:05,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 22:04:05,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 22:04:05,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 22:04:05,074 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 22:04:05,075 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 22:04:05,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 22:04:05,075 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 22:04:05,075 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 22:04:05,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 22:04:05,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 22:04:05,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 22:04:05,435 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 22:04:05,435 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 22:04:05,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-29 22:04:06,590 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 22:04:06,860 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 22:04:06,860 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-29 22:04:06,872 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da22b215/d34f908f014c47c5a1df247563d1601f/FLAGd2f5b97c6 [2023-08-29 22:04:06,887 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da22b215/d34f908f014c47c5a1df247563d1601f [2023-08-29 22:04:06,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 22:04:06,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 22:04:06,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 22:04:06,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 22:04:06,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 22:04:06,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:04:06" (1/1) ... [2023-08-29 22:04:06,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5152a6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:06, skipping insertion in model container [2023-08-29 22:04:06,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:04:06" (1/1) ... [2023-08-29 22:04:06,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 22:04:06,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 22:04:07,289 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2023-08-29 22:04:07,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:04:07,362 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 22:04:07,400 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2023-08-29 22:04:07,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 22:04:07,486 INFO L208 MainTranslator]: Completed translation [2023-08-29 22:04:07,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07 WrapperNode [2023-08-29 22:04:07,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 22:04:07,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 22:04:07,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 22:04:07,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 22:04:07,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,564 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-08-29 22:04:07,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 22:04:07,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 22:04:07,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 22:04:07,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 22:04:07,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 22:04:07,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 22:04:07,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 22:04:07,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 22:04:07,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (1/1) ... [2023-08-29 22:04:07,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 22:04:07,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:04:07,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 22:04:07,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 22:04:07,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 22:04:07,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-29 22:04:07,697 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-29 22:04:07,697 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-29 22:04:07,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 22:04:07,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 22:04:07,697 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-29 22:04:07,698 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-29 22:04:07,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 22:04:07,698 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 22:04:07,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 22:04:07,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 22:04:07,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-29 22:04:07,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 22:04:07,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 22:04:07,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 22:04:07,700 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 22:04:07,888 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 22:04:07,890 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 22:04:08,319 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 22:04:08,329 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 22:04:08,329 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-29 22:04:08,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:04:08 BoogieIcfgContainer [2023-08-29 22:04:08,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 22:04:08,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 22:04:08,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 22:04:08,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 22:04:08,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:04:06" (1/3) ... [2023-08-29 22:04:08,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509576fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:04:08, skipping insertion in model container [2023-08-29 22:04:08,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:04:07" (2/3) ... [2023-08-29 22:04:08,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509576fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:04:08, skipping insertion in model container [2023-08-29 22:04:08,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:04:08" (3/3) ... [2023-08-29 22:04:08,340 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2023-08-29 22:04:08,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 22:04:08,355 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-29 22:04:08,355 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 22:04:08,504 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 22:04:08,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 250 transitions, 522 flow [2023-08-29 22:04:08,735 INFO L130 PetriNetUnfolder]: 52/485 cut-off events. [2023-08-29 22:04:08,736 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-29 22:04:08,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 485 events. 52/485 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2225 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 245. Up to 8 conditions per place. [2023-08-29 22:04:08,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 250 transitions, 522 flow [2023-08-29 22:04:08,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 250 transitions, 522 flow [2023-08-29 22:04:08,765 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:04:08,787 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 250 transitions, 522 flow [2023-08-29 22:04:08,790 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 250 transitions, 522 flow [2023-08-29 22:04:08,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 250 transitions, 522 flow [2023-08-29 22:04:08,865 INFO L130 PetriNetUnfolder]: 52/485 cut-off events. [2023-08-29 22:04:08,865 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-29 22:04:08,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 485 events. 52/485 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2225 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 245. Up to 8 conditions per place. [2023-08-29 22:04:08,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 20814 [2023-08-29 22:04:16,919 INFO L134 LiptonReduction]: Checked pairs total: 63255 [2023-08-29 22:04:16,920 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-29 22:04:16,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:04:16,936 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56446f7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:04:16,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2023-08-29 22:04:16,938 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 22:04:16,939 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:04:16,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:16,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 22:04:16,940 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:16,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash 975, now seen corresponding path program 1 times [2023-08-29 22:04:16,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:16,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874556782] [2023-08-29 22:04:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:16,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:17,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:17,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874556782] [2023-08-29 22:04:17,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874556782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:17,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:17,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 22:04:17,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679007652] [2023-08-29 22:04:17,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:17,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 22:04:17,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 22:04:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 22:04:17,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 464 [2023-08-29 22:04:17,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:17,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:17,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 464 [2023-08-29 22:04:17,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:18,641 INFO L130 PetriNetUnfolder]: 9080/16126 cut-off events. [2023-08-29 22:04:18,642 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-29 22:04:18,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30362 conditions, 16126 events. 9080/16126 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 127227 event pairs, 8656 based on Foata normal form. 809/9391 useless extension candidates. Maximal degree in co-relation 27808. Up to 14126 conditions per place. [2023-08-29 22:04:18,749 INFO L137 encePairwiseOnDemand]: 449/464 looper letters, 67 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2023-08-29 22:04:18,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 334 flow [2023-08-29 22:04:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 22:04:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 22:04:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 536 transitions. [2023-08-29 22:04:18,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775862068965517 [2023-08-29 22:04:18,769 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 536 transitions. [2023-08-29 22:04:18,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 536 transitions. [2023-08-29 22:04:18,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:18,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 536 transitions. [2023-08-29 22:04:18,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 268.0) internal successors, (536), 2 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:18,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 464.0) internal successors, (1392), 3 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:18,785 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 464.0) internal successors, (1392), 3 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:18,787 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 230 flow. Second operand 2 states and 536 transitions. [2023-08-29 22:04:18,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 334 flow [2023-08-29 22:04:18,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:04:18,798 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 200 flow [2023-08-29 22:04:18,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=200, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2023-08-29 22:04:18,803 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2023-08-29 22:04:18,804 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 200 flow [2023-08-29 22:04:18,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:18,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:18,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:04:18,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 22:04:18,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:18,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:18,816 INFO L85 PathProgramCache]: Analyzing trace with hash 31141, now seen corresponding path program 1 times [2023-08-29 22:04:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:18,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724242415] [2023-08-29 22:04:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:18,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:18,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724242415] [2023-08-29 22:04:18,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724242415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:18,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:18,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:04:18,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982952170] [2023-08-29 22:04:18,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:18,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:04:18,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:04:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:04:19,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 464 [2023-08-29 22:04:19,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:19,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:19,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 464 [2023-08-29 22:04:19,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:20,468 INFO L130 PetriNetUnfolder]: 9022/15572 cut-off events. [2023-08-29 22:04:20,468 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2023-08-29 22:04:20,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29791 conditions, 15572 events. 9022/15572 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 119914 event pairs, 6048 based on Foata normal form. 0/8577 useless extension candidates. Maximal degree in co-relation 29786. Up to 9957 conditions per place. [2023-08-29 22:04:20,546 INFO L137 encePairwiseOnDemand]: 460/464 looper letters, 101 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2023-08-29 22:04:20,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 476 flow [2023-08-29 22:04:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:04:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:04:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 759 transitions. [2023-08-29 22:04:20,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452586206896551 [2023-08-29 22:04:20,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 759 transitions. [2023-08-29 22:04:20,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 759 transitions. [2023-08-29 22:04:20,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:20,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 759 transitions. [2023-08-29 22:04:20,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:20,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:20,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:20,555 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 200 flow. Second operand 3 states and 759 transitions. [2023-08-29 22:04:20,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 476 flow [2023-08-29 22:04:20,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 124 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 22:04:20,559 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 200 flow [2023-08-29 22:04:20,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2023-08-29 22:04:20,560 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2023-08-29 22:04:20,561 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 200 flow [2023-08-29 22:04:20,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:20,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:20,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 22:04:20,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 22:04:20,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:20,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:20,563 INFO L85 PathProgramCache]: Analyzing trace with hash 31139, now seen corresponding path program 1 times [2023-08-29 22:04:20,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:20,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621972499] [2023-08-29 22:04:20,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:20,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:20,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:20,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621972499] [2023-08-29 22:04:20,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621972499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:20,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:20,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 22:04:20,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095874422] [2023-08-29 22:04:20,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:04:20,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:04:20,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:04:20,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 464 [2023-08-29 22:04:20,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:20,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:20,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 464 [2023-08-29 22:04:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:21,960 INFO L130 PetriNetUnfolder]: 8380/14131 cut-off events. [2023-08-29 22:04:21,960 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2023-08-29 22:04:21,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27523 conditions, 14131 events. 8380/14131 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 101302 event pairs, 8008 based on Foata normal form. 0/8229 useless extension candidates. Maximal degree in co-relation 27517. Up to 12978 conditions per place. [2023-08-29 22:04:22,047 INFO L137 encePairwiseOnDemand]: 459/464 looper letters, 65 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-29 22:04:22,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 342 flow [2023-08-29 22:04:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:04:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:04:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-29 22:04:22,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244252873563219 [2023-08-29 22:04:22,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-29 22:04:22,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-29 22:04:22,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:22,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-29 22:04:22,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:22,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:22,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:22,058 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 200 flow. Second operand 3 states and 730 transitions. [2023-08-29 22:04:22,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 342 flow [2023-08-29 22:04:22,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:04:22,067 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 217 flow [2023-08-29 22:04:22,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2023-08-29 22:04:22,069 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -2 predicate places. [2023-08-29 22:04:22,069 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 217 flow [2023-08-29 22:04:22,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:22,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:22,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:04:22,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 22:04:22,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:22,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash 928419387, now seen corresponding path program 1 times [2023-08-29 22:04:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:22,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25743092] [2023-08-29 22:04:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:22,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:22,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:22,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25743092] [2023-08-29 22:04:22,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25743092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:04:22,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255758865] [2023-08-29 22:04:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:22,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:04:22,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:04:22,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:04:22,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 22:04:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:22,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 22:04:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:04:22,505 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 22:04:22,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-29 22:04:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:22,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:04:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:22,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255758865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:04:22,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:04:22,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 22:04:22,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108503409] [2023-08-29 22:04:22,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:04:22,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:04:22,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:04:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:04:23,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 464 [2023-08-29 22:04:23,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 217 flow. Second operand has 7 states, 7 states have (on average 217.71428571428572) internal successors, (1524), 7 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:23,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:23,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 464 [2023-08-29 22:04:23,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:24,155 INFO L130 PetriNetUnfolder]: 7437/12482 cut-off events. [2023-08-29 22:04:24,156 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2023-08-29 22:04:24,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24179 conditions, 12482 events. 7437/12482 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 88390 event pairs, 4204 based on Foata normal form. 1/6965 useless extension candidates. Maximal degree in co-relation 24172. Up to 11519 conditions per place. [2023-08-29 22:04:24,246 INFO L137 encePairwiseOnDemand]: 459/464 looper letters, 76 selfloop transitions, 6 changer transitions 0/104 dead transitions. [2023-08-29 22:04:24,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 104 transitions, 409 flow [2023-08-29 22:04:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:04:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:04:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1381 transitions. [2023-08-29 22:04:24,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49604885057471265 [2023-08-29 22:04:24,251 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1381 transitions. [2023-08-29 22:04:24,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1381 transitions. [2023-08-29 22:04:24,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:24,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1381 transitions. [2023-08-29 22:04:24,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.16666666666666) internal successors, (1381), 6 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:24,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 464.0) internal successors, (3248), 7 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:24,261 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 464.0) internal successors, (3248), 7 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:24,262 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 217 flow. Second operand 6 states and 1381 transitions. [2023-08-29 22:04:24,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 104 transitions, 409 flow [2023-08-29 22:04:24,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 104 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 22:04:24,267 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 222 flow [2023-08-29 22:04:24,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-08-29 22:04:24,269 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 1 predicate places. [2023-08-29 22:04:24,269 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 222 flow [2023-08-29 22:04:24,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 217.71428571428572) internal successors, (1524), 7 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:24,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:24,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:04:24,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 22:04:24,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:04:24,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:24,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash 928419608, now seen corresponding path program 1 times [2023-08-29 22:04:24,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:24,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254845076] [2023-08-29 22:04:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:24,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:24,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:24,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254845076] [2023-08-29 22:04:24,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254845076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:24,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:24,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:04:24,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637308343] [2023-08-29 22:04:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:24,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:04:24,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:24,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:04:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:04:24,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 464 [2023-08-29 22:04:24,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:24,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:24,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 464 [2023-08-29 22:04:24,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:25,922 INFO L130 PetriNetUnfolder]: 11404/18931 cut-off events. [2023-08-29 22:04:25,922 INFO L131 PetriNetUnfolder]: For 247/247 co-relation queries the response was YES. [2023-08-29 22:04:25,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36888 conditions, 18931 events. 11404/18931 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 140045 event pairs, 7272 based on Foata normal form. 0/10929 useless extension candidates. Maximal degree in co-relation 36881. Up to 12873 conditions per place. [2023-08-29 22:04:26,073 INFO L137 encePairwiseOnDemand]: 457/464 looper letters, 106 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2023-08-29 22:04:26,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 130 transitions, 530 flow [2023-08-29 22:04:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:04:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:04:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 770 transitions. [2023-08-29 22:04:26,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531609195402298 [2023-08-29 22:04:26,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 770 transitions. [2023-08-29 22:04:26,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 770 transitions. [2023-08-29 22:04:26,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:26,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 770 transitions. [2023-08-29 22:04:26,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.6666666666667) internal successors, (770), 3 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:26,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:26,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:26,083 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 222 flow. Second operand 3 states and 770 transitions. [2023-08-29 22:04:26,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 130 transitions, 530 flow [2023-08-29 22:04:26,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 130 transitions, 516 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 22:04:26,091 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 248 flow [2023-08-29 22:04:26,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-08-29 22:04:26,094 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2023-08-29 22:04:26,094 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 248 flow [2023-08-29 22:04:26,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:26,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:26,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 22:04:26,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 22:04:26,095 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:26,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:26,098 INFO L85 PathProgramCache]: Analyzing trace with hash 928419609, now seen corresponding path program 1 times [2023-08-29 22:04:26,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:26,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13691542] [2023-08-29 22:04:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:26,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:26,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:26,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13691542] [2023-08-29 22:04:26,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13691542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:26,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:26,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 22:04:26,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400454977] [2023-08-29 22:04:26,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:26,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 22:04:26,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 22:04:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 22:04:26,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 464 [2023-08-29 22:04:26,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:26,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:26,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 464 [2023-08-29 22:04:26,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:27,463 INFO L130 PetriNetUnfolder]: 11865/19836 cut-off events. [2023-08-29 22:04:27,463 INFO L131 PetriNetUnfolder]: For 2173/3030 co-relation queries the response was YES. [2023-08-29 22:04:27,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39861 conditions, 19836 events. 11865/19836 cut-off events. For 2173/3030 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 151728 event pairs, 7564 based on Foata normal form. 123/11991 useless extension candidates. Maximal degree in co-relation 39854. Up to 18237 conditions per place. [2023-08-29 22:04:27,587 INFO L137 encePairwiseOnDemand]: 460/464 looper letters, 74 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-08-29 22:04:27,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 99 transitions, 420 flow [2023-08-29 22:04:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 22:04:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 22:04:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2023-08-29 22:04:27,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316091954022989 [2023-08-29 22:04:27,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2023-08-29 22:04:27,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2023-08-29 22:04:27,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:27,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2023-08-29 22:04:27,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:27,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:27,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 464.0) internal successors, (1856), 4 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:27,602 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 248 flow. Second operand 3 states and 740 transitions. [2023-08-29 22:04:27,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 99 transitions, 420 flow [2023-08-29 22:04:27,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 99 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:04:27,612 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 249 flow [2023-08-29 22:04:27,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2023-08-29 22:04:27,615 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2023-08-29 22:04:27,615 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 249 flow [2023-08-29 22:04:27,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:27,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:27,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:27,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 22:04:27,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:27,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1142102375, now seen corresponding path program 1 times [2023-08-29 22:04:27,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:27,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421139889] [2023-08-29 22:04:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:27,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:27,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:27,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421139889] [2023-08-29 22:04:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421139889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 22:04:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77312401] [2023-08-29 22:04:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:27,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 22:04:27,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 22:04:27,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 22:04:27,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 22:04:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:27,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 22:04:27,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 22:04:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:27,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 22:04:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:27,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77312401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 22:04:27,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 22:04:27,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 22:04:27,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906803827] [2023-08-29 22:04:27,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 22:04:27,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 22:04:27,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 22:04:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 22:04:27,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 464 [2023-08-29 22:04:27,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 224.42857142857142) internal successors, (1571), 7 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:27,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:27,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 464 [2023-08-29 22:04:27,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:27,887 INFO L130 PetriNetUnfolder]: 16/64 cut-off events. [2023-08-29 22:04:27,887 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-29 22:04:27,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 64 events. 16/64 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 183 event pairs, 8 based on Foata normal form. 8/57 useless extension candidates. Maximal degree in co-relation 137. Up to 34 conditions per place. [2023-08-29 22:04:27,888 INFO L137 encePairwiseOnDemand]: 461/464 looper letters, 17 selfloop transitions, 3 changer transitions 2/29 dead transitions. [2023-08-29 22:04:27,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 132 flow [2023-08-29 22:04:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 22:04:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 22:04:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 910 transitions. [2023-08-29 22:04:27,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49030172413793105 [2023-08-29 22:04:27,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 910 transitions. [2023-08-29 22:04:27,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 910 transitions. [2023-08-29 22:04:27,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:27,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 910 transitions. [2023-08-29 22:04:27,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:27,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 464.0) internal successors, (2320), 5 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:27,896 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 464.0) internal successors, (2320), 5 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:27,896 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 249 flow. Second operand 4 states and 910 transitions. [2023-08-29 22:04:27,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 132 flow [2023-08-29 22:04:27,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 118 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-29 22:04:27,898 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 62 flow [2023-08-29 22:04:27,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-08-29 22:04:27,898 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -60 predicate places. [2023-08-29 22:04:27,898 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 62 flow [2023-08-29 22:04:27,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 224.42857142857142) internal successors, (1571), 7 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:27,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:27,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:27,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 22:04:28,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-29 22:04:28,105 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:28,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1040020579, now seen corresponding path program 1 times [2023-08-29 22:04:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:28,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880024889] [2023-08-29 22:04:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:28,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:28,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880024889] [2023-08-29 22:04:28,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880024889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:28,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:28,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:04:28,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131835378] [2023-08-29 22:04:28,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:28,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:04:28,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:28,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:04:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:04:28,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 464 [2023-08-29 22:04:28,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 62 flow. Second operand has 6 states, 6 states have (on average 217.16666666666666) internal successors, (1303), 6 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:28,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:28,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 464 [2023-08-29 22:04:28,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:28,823 INFO L130 PetriNetUnfolder]: 12/51 cut-off events. [2023-08-29 22:04:28,823 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-29 22:04:28,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 51 events. 12/51 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 127 event pairs, 1 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 111. Up to 20 conditions per place. [2023-08-29 22:04:28,824 INFO L137 encePairwiseOnDemand]: 459/464 looper letters, 13 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-08-29 22:04:28,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 106 flow [2023-08-29 22:04:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:04:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:04:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1096 transitions. [2023-08-29 22:04:28,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724137931034483 [2023-08-29 22:04:28,827 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1096 transitions. [2023-08-29 22:04:28,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1096 transitions. [2023-08-29 22:04:28,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:28,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1096 transitions. [2023-08-29 22:04:28,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.2) internal successors, (1096), 5 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:28,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 464.0) internal successors, (2784), 6 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:28,834 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 464.0) internal successors, (2784), 6 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:28,834 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 62 flow. Second operand 5 states and 1096 transitions. [2023-08-29 22:04:28,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 106 flow [2023-08-29 22:04:28,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 22:04:28,835 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 60 flow [2023-08-29 22:04:28,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-29 22:04:28,835 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -61 predicate places. [2023-08-29 22:04:28,836 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 60 flow [2023-08-29 22:04:28,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 217.16666666666666) internal successors, (1303), 6 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:28,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:28,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:28,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 22:04:28,837 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:28,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1040020580, now seen corresponding path program 1 times [2023-08-29 22:04:28,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:28,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515981187] [2023-08-29 22:04:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:28,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:28,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:28,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515981187] [2023-08-29 22:04:28,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515981187] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:28,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:28,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 22:04:28,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755746698] [2023-08-29 22:04:28,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:28,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 22:04:28,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:28,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 22:04:28,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-29 22:04:29,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 464 [2023-08-29 22:04:29,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 60 flow. Second operand has 8 states, 8 states have (on average 207.0) internal successors, (1656), 8 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:29,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 464 [2023-08-29 22:04:29,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:29,559 INFO L130 PetriNetUnfolder]: 12/45 cut-off events. [2023-08-29 22:04:29,560 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 22:04:29,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 45 events. 12/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 87 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 111. Up to 15 conditions per place. [2023-08-29 22:04:29,560 INFO L137 encePairwiseOnDemand]: 458/464 looper letters, 12 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2023-08-29 22:04:29,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 21 transitions, 106 flow [2023-08-29 22:04:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 22:04:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 22:04:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1254 transitions. [2023-08-29 22:04:29,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4504310344827586 [2023-08-29 22:04:29,565 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1254 transitions. [2023-08-29 22:04:29,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1254 transitions. [2023-08-29 22:04:29,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:29,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1254 transitions. [2023-08-29 22:04:29,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 464.0) internal successors, (3248), 7 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,573 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 464.0) internal successors, (3248), 7 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,573 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 60 flow. Second operand 6 states and 1254 transitions. [2023-08-29 22:04:29,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 21 transitions, 106 flow [2023-08-29 22:04:29,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 21 transitions, 101 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:04:29,575 INFO L231 Difference]: Finished difference. Result has 31 places, 16 transitions, 61 flow [2023-08-29 22:04:29,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=16} [2023-08-29 22:04:29,576 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -61 predicate places. [2023-08-29 22:04:29,576 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 16 transitions, 61 flow [2023-08-29 22:04:29,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 207.0) internal successors, (1656), 8 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:29,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:29,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 22:04:29,577 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:29,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1267713111, now seen corresponding path program 1 times [2023-08-29 22:04:29,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:29,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648538605] [2023-08-29 22:04:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:29,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:29,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:29,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648538605] [2023-08-29 22:04:29,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648538605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:29,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:29,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 22:04:29,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179128659] [2023-08-29 22:04:29,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:29,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 22:04:29,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:29,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 22:04:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 22:04:29,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 464 [2023-08-29 22:04:29,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 16 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 214.66666666666666) internal successors, (1288), 6 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:29,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 464 [2023-08-29 22:04:29,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:29,975 INFO L130 PetriNetUnfolder]: 14/44 cut-off events. [2023-08-29 22:04:29,976 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 22:04:29,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 44 events. 14/44 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 123. Up to 20 conditions per place. [2023-08-29 22:04:29,977 INFO L137 encePairwiseOnDemand]: 460/464 looper letters, 13 selfloop transitions, 4 changer transitions 1/20 dead transitions. [2023-08-29 22:04:29,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 20 transitions, 111 flow [2023-08-29 22:04:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:04:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:04:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1083 transitions. [2023-08-29 22:04:29,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668103448275862 [2023-08-29 22:04:29,981 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1083 transitions. [2023-08-29 22:04:29,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1083 transitions. [2023-08-29 22:04:29,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:29,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1083 transitions. [2023-08-29 22:04:29,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.6) internal successors, (1083), 5 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 464.0) internal successors, (2784), 6 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,987 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 464.0) internal successors, (2784), 6 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,988 INFO L175 Difference]: Start difference. First operand has 31 places, 16 transitions, 61 flow. Second operand 5 states and 1083 transitions. [2023-08-29 22:04:29,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 20 transitions, 111 flow [2023-08-29 22:04:29,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 20 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 22:04:29,989 INFO L231 Difference]: Finished difference. Result has 30 places, 14 transitions, 56 flow [2023-08-29 22:04:29,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=56, PETRI_PLACES=30, PETRI_TRANSITIONS=14} [2023-08-29 22:04:29,990 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -62 predicate places. [2023-08-29 22:04:29,990 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 14 transitions, 56 flow [2023-08-29 22:04:29,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.66666666666666) internal successors, (1288), 6 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:29,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:29,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:29,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 22:04:29,993 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-29 22:04:29,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:29,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1267713112, now seen corresponding path program 1 times [2023-08-29 22:04:29,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:29,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105163634] [2023-08-29 22:04:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:29,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:30,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:30,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105163634] [2023-08-29 22:04:30,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105163634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:30,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:30,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 22:04:30,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561774625] [2023-08-29 22:04:30,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:30,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 22:04:30,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 22:04:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 22:04:30,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 464 [2023-08-29 22:04:30,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 14 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:30,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:30,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 464 [2023-08-29 22:04:30,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 22:04:30,348 INFO L130 PetriNetUnfolder]: 10/34 cut-off events. [2023-08-29 22:04:30,348 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 22:04:30,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 34 events. 10/34 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 3/37 useless extension candidates. Maximal degree in co-relation 101. Up to 15 conditions per place. [2023-08-29 22:04:30,349 INFO L137 encePairwiseOnDemand]: 460/464 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-29 22:04:30,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 18 transitions, 102 flow [2023-08-29 22:04:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 22:04:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 22:04:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1126 transitions. [2023-08-29 22:04:30,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853448275862069 [2023-08-29 22:04:30,352 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1126 transitions. [2023-08-29 22:04:30,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1126 transitions. [2023-08-29 22:04:30,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 22:04:30,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1126 transitions. [2023-08-29 22:04:30,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:30,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 464.0) internal successors, (2784), 6 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:30,359 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 464.0) internal successors, (2784), 6 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:30,360 INFO L175 Difference]: Start difference. First operand has 30 places, 14 transitions, 56 flow. Second operand 5 states and 1126 transitions. [2023-08-29 22:04:30,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 18 transitions, 102 flow [2023-08-29 22:04:30,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 18 transitions, 95 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 22:04:30,360 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-29 22:04:30,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=464, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-29 22:04:30,361 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -63 predicate places. [2023-08-29 22:04:30,361 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-29 22:04:30,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:30,364 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 63 remaining) [2023-08-29 22:04:30,364 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 63 remaining) [2023-08-29 22:04:30,365 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 63 remaining) [2023-08-29 22:04:30,365 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 63 remaining) [2023-08-29 22:04:30,365 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 63 remaining) [2023-08-29 22:04:30,365 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 63 remaining) [2023-08-29 22:04:30,365 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 63 remaining) [2023-08-29 22:04:30,365 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 63 remaining) [2023-08-29 22:04:30,366 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 63 remaining) [2023-08-29 22:04:30,366 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 63 remaining) [2023-08-29 22:04:30,366 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 63 remaining) [2023-08-29 22:04:30,366 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 63 remaining) [2023-08-29 22:04:30,366 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 63 remaining) [2023-08-29 22:04:30,366 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 63 remaining) [2023-08-29 22:04:30,367 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 63 remaining) [2023-08-29 22:04:30,367 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 63 remaining) [2023-08-29 22:04:30,367 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 63 remaining) [2023-08-29 22:04:30,367 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 63 remaining) [2023-08-29 22:04:30,367 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 63 remaining) [2023-08-29 22:04:30,367 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 63 remaining) [2023-08-29 22:04:30,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 63 remaining) [2023-08-29 22:04:30,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 63 remaining) [2023-08-29 22:04:30,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 63 remaining) [2023-08-29 22:04:30,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 63 remaining) [2023-08-29 22:04:30,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 63 remaining) [2023-08-29 22:04:30,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 63 remaining) [2023-08-29 22:04:30,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 63 remaining) [2023-08-29 22:04:30,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (35 of 63 remaining) [2023-08-29 22:04:30,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 63 remaining) [2023-08-29 22:04:30,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 63 remaining) [2023-08-29 22:04:30,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 63 remaining) [2023-08-29 22:04:30,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 63 remaining) [2023-08-29 22:04:30,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 63 remaining) [2023-08-29 22:04:30,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 63 remaining) [2023-08-29 22:04:30,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 63 remaining) [2023-08-29 22:04:30,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 63 remaining) [2023-08-29 22:04:30,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 63 remaining) [2023-08-29 22:04:30,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 63 remaining) [2023-08-29 22:04:30,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 63 remaining) [2023-08-29 22:04:30,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 63 remaining) [2023-08-29 22:04:30,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 63 remaining) [2023-08-29 22:04:30,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 63 remaining) [2023-08-29 22:04:30,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 63 remaining) [2023-08-29 22:04:30,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 63 remaining) [2023-08-29 22:04:30,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 63 remaining) [2023-08-29 22:04:30,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 63 remaining) [2023-08-29 22:04:30,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 63 remaining) [2023-08-29 22:04:30,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 63 remaining) [2023-08-29 22:04:30,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 63 remaining) [2023-08-29 22:04:30,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 63 remaining) [2023-08-29 22:04:30,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (12 of 63 remaining) [2023-08-29 22:04:30,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 63 remaining) [2023-08-29 22:04:30,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 63 remaining) [2023-08-29 22:04:30,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 63 remaining) [2023-08-29 22:04:30,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 63 remaining) [2023-08-29 22:04:30,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 63 remaining) [2023-08-29 22:04:30,373 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 63 remaining) [2023-08-29 22:04:30,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (5 of 63 remaining) [2023-08-29 22:04:30,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 63 remaining) [2023-08-29 22:04:30,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 63 remaining) [2023-08-29 22:04:30,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 63 remaining) [2023-08-29 22:04:30,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 63 remaining) [2023-08-29 22:04:30,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 63 remaining) [2023-08-29 22:04:30,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 22:04:30,375 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 22:04:30,377 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 22:04:30,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 250 transitions, 522 flow [2023-08-29 22:04:30,425 INFO L130 PetriNetUnfolder]: 52/485 cut-off events. [2023-08-29 22:04:30,426 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-29 22:04:30,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 485 events. 52/485 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2225 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 245. Up to 8 conditions per place. [2023-08-29 22:04:30,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 250 transitions, 522 flow [2023-08-29 22:04:30,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 242 transitions, 500 flow [2023-08-29 22:04:30,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:04:30,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 242 transitions, 500 flow [2023-08-29 22:04:30,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 242 transitions, 500 flow [2023-08-29 22:04:30,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 242 transitions, 500 flow [2023-08-29 22:04:30,472 INFO L130 PetriNetUnfolder]: 48/465 cut-off events. [2023-08-29 22:04:30,472 INFO L131 PetriNetUnfolder]: For 4/7 co-relation queries the response was YES. [2023-08-29 22:04:30,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 465 events. 48/465 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2120 event pairs, 0 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 227. Up to 8 conditions per place. [2023-08-29 22:04:30,487 INFO L119 LiptonReduction]: Number of co-enabled transitions 20022 [2023-08-29 22:04:37,358 INFO L134 LiptonReduction]: Checked pairs total: 57950 [2023-08-29 22:04:37,359 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-08-29 22:04:37,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 22:04:37,361 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56446f7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:04:37,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-29 22:04:37,367 INFO L130 PetriNetUnfolder]: 2/44 cut-off events. [2023-08-29 22:04:37,367 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:04:37,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:37,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 22:04:37,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 22:04:37,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash 229486719, now seen corresponding path program 1 times [2023-08-29 22:04:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:37,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820745882] [2023-08-29 22:04:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:04:37,391 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 22:04:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 22:04:37,430 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 22:04:37,431 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 22:04:37,431 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-29 22:04:37,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-29 22:04:37,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 22:04:37,432 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 22:04:37,433 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-29 22:04:37,434 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 22:04:37,434 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 22:04:37,517 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-29 22:04:37,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 391 transitions, 830 flow [2023-08-29 22:04:37,742 INFO L130 PetriNetUnfolder]: 191/1440 cut-off events. [2023-08-29 22:04:37,742 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-08-29 22:04:37,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 1440 events. 191/1440 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9813 event pairs, 2 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 898. Up to 32 conditions per place. [2023-08-29 22:04:37,771 INFO L82 GeneralOperation]: Start removeDead. Operand has 358 places, 391 transitions, 830 flow [2023-08-29 22:04:37,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 358 places, 391 transitions, 830 flow [2023-08-29 22:04:37,789 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 22:04:37,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 358 places, 391 transitions, 830 flow [2023-08-29 22:04:37,789 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 358 places, 391 transitions, 830 flow [2023-08-29 22:04:37,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 391 transitions, 830 flow [2023-08-29 22:04:37,996 INFO L130 PetriNetUnfolder]: 191/1440 cut-off events. [2023-08-29 22:04:37,996 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-08-29 22:04:38,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 1440 events. 191/1440 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9813 event pairs, 2 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 898. Up to 32 conditions per place. [2023-08-29 22:04:38,086 INFO L119 LiptonReduction]: Number of co-enabled transitions 80640 [2023-08-29 22:04:46,556 INFO L134 LiptonReduction]: Checked pairs total: 263859 [2023-08-29 22:04:46,556 INFO L136 LiptonReduction]: Total number of compositions: 320 [2023-08-29 22:04:46,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 22:04:46,558 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@56446f7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 22:04:46,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 88 error locations. [2023-08-29 22:04:46,559 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 22:04:46,559 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 22:04:46,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 22:04:46,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 22:04:46,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2023-08-29 22:04:46,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 22:04:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2018, now seen corresponding path program 1 times [2023-08-29 22:04:46,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 22:04:46,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325742130] [2023-08-29 22:04:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 22:04:46,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 22:04:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 22:04:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 22:04:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 22:04:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325742130] [2023-08-29 22:04:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325742130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 22:04:46,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 22:04:46,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 22:04:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740662826] [2023-08-29 22:04:46,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 22:04:46,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 22:04:46,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 22:04:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 22:04:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 22:04:46,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 711 [2023-08-29 22:04:46,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 402 flow. Second operand has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 22:04:46,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 22:04:46,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 711 [2023-08-29 22:04:46,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand