./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_03-munge_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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_03-munge_racing.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 7df5d4e763d99c6ca9aa3d4daa03dcc5b8b9d65829db9a89ff85ebe5a14f3ac3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:02:13,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:02:13,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:02:13,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:02:13,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:02:13,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:02:13,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:02:13,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:02:13,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:02:13,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:02:13,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:02:13,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:02:13,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:02:13,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:02:13,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:02:13,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:02:13,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:02:13,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:02:13,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:02:13,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:02:13,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:02:13,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:02:13,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:02:13,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:02:13,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:02:13,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:02:13,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:02:13,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:02:13,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:02:13,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:02:13,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:02:13,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:02:13,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:02:13,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:02:13,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:02:13,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:02:13,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:02:13,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:02:13,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:02:13,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:02:13,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:02:13,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:02:13,772 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:02:13,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:02:13,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:02:13,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:02:13,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:02:13,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:02:13,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:02:13,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:02:13,774 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:02:13,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:02:13,774 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:02:13,774 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:02:13,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:02:13,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:02:13,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:02:13,775 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:02:13,775 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:02:13,775 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:02:13,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:02:13,776 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:02:13,776 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:02:13,776 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:02:13,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:02:13,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:02:13,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:02:13,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:02:13,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:02:13,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:02:13,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:02:13,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:02:13,778 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:02:13,778 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:02:13,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:02:13,778 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:02:13,778 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7df5d4e763d99c6ca9aa3d4daa03dcc5b8b9d65829db9a89ff85ebe5a14f3ac3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:02:14,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:02:14,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:02:14,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:02:14,057 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:02:14,057 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:02:14,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_03-munge_racing.i [2023-08-30 04:02:15,113 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:02:15,290 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:02:15,291 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_03-munge_racing.i [2023-08-30 04:02:15,299 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31dcf6fda/3f40cb501a4e4a5b92ea00d31c98dba3/FLAGd8a62781e [2023-08-30 04:02:15,311 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31dcf6fda/3f40cb501a4e4a5b92ea00d31c98dba3 [2023-08-30 04:02:15,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:02:15,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:02:15,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:02:15,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:02:15,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:02:15,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de1c24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15, skipping insertion in model container [2023-08-30 04:02:15,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:02:15,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:02:15,557 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_03-munge_racing.i[30176,30189] [2023-08-30 04:02:15,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:02:15,588 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:02:15,615 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_03-munge_racing.i[30176,30189] [2023-08-30 04:02:15,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:02:15,667 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:02:15,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15 WrapperNode [2023-08-30 04:02:15,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:02:15,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:02:15,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:02:15,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:02:15,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,723 INFO L138 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 201 [2023-08-30 04:02:15,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:02:15,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:02:15,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:02:15,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:02:15,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,761 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:02:15,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:02:15,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:02:15,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:02:15,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (1/1) ... [2023-08-30 04:02:15,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:02:15,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:15,796 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) [2023-08-30 04:02:15,805 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 [2023-08-30 04:02:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:02:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 04:02:15,829 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 04:02:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:02:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:02:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:02:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:02:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 04:02:15,830 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 04:02:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:02:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:02:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:02:15,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:02:15,832 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:02:15,929 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:02:15,931 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:02:16,213 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:02:16,233 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:02:16,233 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-30 04:02:16,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:02:16 BoogieIcfgContainer [2023-08-30 04:02:16,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:02:16,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:02:16,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:02:16,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:02:16,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:02:15" (1/3) ... [2023-08-30 04:02:16,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4431a2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:02:16, skipping insertion in model container [2023-08-30 04:02:16,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:02:15" (2/3) ... [2023-08-30 04:02:16,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4431a2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:02:16, skipping insertion in model container [2023-08-30 04:02:16,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:02:16" (3/3) ... [2023-08-30 04:02:16,241 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_03-munge_racing.i [2023-08-30 04:02:16,254 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:02:16,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-30 04:02:16,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:02:16,317 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:02:16,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 210 transitions, 442 flow [2023-08-30 04:02:16,489 INFO L130 PetriNetUnfolder]: 58/397 cut-off events. [2023-08-30 04:02:16,489 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 04:02:16,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 397 events. 58/397 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1784 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-30 04:02:16,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 210 transitions, 442 flow [2023-08-30 04:02:16,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 210 transitions, 442 flow [2023-08-30 04:02:16,509 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:16,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 210 transitions, 442 flow [2023-08-30 04:02:16,533 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 210 transitions, 442 flow [2023-08-30 04:02:16,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 210 transitions, 442 flow [2023-08-30 04:02:16,589 INFO L130 PetriNetUnfolder]: 58/397 cut-off events. [2023-08-30 04:02:16,589 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 04:02:16,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 397 events. 58/397 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1784 event pairs, 0 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-30 04:02:16,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 18036 [2023-08-30 04:02:19,716 INFO L134 LiptonReduction]: Checked pairs total: 32543 [2023-08-30 04:02:19,716 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-30 04:02:19,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:19,732 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;@7a798079, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:19,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-30 04:02:19,736 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:02:19,736 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:19,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:19,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:19,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-30 04:02:19,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash 26924, now seen corresponding path program 1 times [2023-08-30 04:02:19,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:19,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537144655] [2023-08-30 04:02:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:19,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:19,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:19,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537144655] [2023-08-30 04:02:19,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537144655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:19,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:19,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:19,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760999315] [2023-08-30 04:02:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:19,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:19,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:19,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 368 [2023-08-30 04:02:19,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 91 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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) [2023-08-30 04:02:19,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:19,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 368 [2023-08-30 04:02:19,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:20,671 INFO L130 PetriNetUnfolder]: 5356/9260 cut-off events. [2023-08-30 04:02:20,672 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-30 04:02:20,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17475 conditions, 9260 events. 5356/9260 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 67435 event pairs, 4236 based on Foata normal form. 1454/7815 useless extension candidates. Maximal degree in co-relation 16401. Up to 6961 conditions per place. [2023-08-30 04:02:20,740 INFO L137 encePairwiseOnDemand]: 342/368 looper letters, 73 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-08-30 04:02:20,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 358 flow [2023-08-30 04:02:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-30 04:02:20,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-08-30 04:02:20,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-30 04:02:20,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-30 04:02:20,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:20,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-30 04:02:20,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 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) [2023-08-30 04:02:20,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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) [2023-08-30 04:02:20,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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) [2023-08-30 04:02:20,761 INFO L175 Difference]: Start difference. First operand has 69 places, 91 transitions, 204 flow. Second operand 3 states and 621 transitions. [2023-08-30 04:02:20,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 358 flow [2023-08-30 04:02:20,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:02:20,767 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 162 flow [2023-08-30 04:02:20,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-30 04:02:20,770 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-08-30 04:02:20,771 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 162 flow [2023-08-30 04:02:20,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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) [2023-08-30 04:02:20,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:20,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:20,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:02:20,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-30 04:02:20,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:20,772 INFO L85 PathProgramCache]: Analyzing trace with hash 26926, now seen corresponding path program 1 times [2023-08-30 04:02:20,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:20,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546951774] [2023-08-30 04:02:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:20,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:20,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546951774] [2023-08-30 04:02:20,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546951774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:20,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:20,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:20,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028759201] [2023-08-30 04:02:20,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:20,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:20,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:20,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 368 [2023-08-30 04:02:20,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 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) [2023-08-30 04:02:20,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:20,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 368 [2023-08-30 04:02:20,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:21,457 INFO L130 PetriNetUnfolder]: 5359/9315 cut-off events. [2023-08-30 04:02:21,457 INFO L131 PetriNetUnfolder]: For 304/304 co-relation queries the response was YES. [2023-08-30 04:02:21,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17922 conditions, 9315 events. 5359/9315 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 68043 event pairs, 4257 based on Foata normal form. 0/6751 useless extension candidates. Maximal degree in co-relation 17151. Up to 8069 conditions per place. [2023-08-30 04:02:21,505 INFO L137 encePairwiseOnDemand]: 364/368 looper letters, 62 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-30 04:02:21,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 316 flow [2023-08-30 04:02:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:02:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:02:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2023-08-30 04:02:21,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244565217391305 [2023-08-30 04:02:21,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2023-08-30 04:02:21,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2023-08-30 04:02:21,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:21,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2023-08-30 04:02:21,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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) [2023-08-30 04:02:21,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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) [2023-08-30 04:02:21,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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) [2023-08-30 04:02:21,511 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 162 flow. Second operand 3 states and 579 transitions. [2023-08-30 04:02:21,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 316 flow [2023-08-30 04:02:21,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:02:21,517 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 166 flow [2023-08-30 04:02:21,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2023-08-30 04:02:21,518 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2023-08-30 04:02:21,518 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 166 flow [2023-08-30 04:02:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 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) [2023-08-30 04:02:21,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:21,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:02:21,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:02:21,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-30 04:02:21,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash 802771957, now seen corresponding path program 1 times [2023-08-30 04:02:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:21,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548899082] [2023-08-30 04:02:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:21,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:21,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548899082] [2023-08-30 04:02:21,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548899082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:02:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208147607] [2023-08-30 04:02:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:21,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:21,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:02:21,629 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) [2023-08-30 04:02:21,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:02:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:21,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:02:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:02:21,819 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 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:02:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:21,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:02:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:21,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208147607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:02:21,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:02:21,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:02:21,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699959180] [2023-08-30 04:02:21,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:02:21,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:02:21,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:21,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:02:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:02:22,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 368 [2023-08-30 04:02:22,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 166 flow. Second operand has 8 states, 8 states have (on average 167.875) internal successors, (1343), 8 states have internal predecessors, (1343), 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) [2023-08-30 04:02:22,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:22,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 368 [2023-08-30 04:02:22,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:02:22,123 INFO L130 PetriNetUnfolder]: 27/86 cut-off events. [2023-08-30 04:02:22,123 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 04:02:22,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 86 events. 27/86 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 253 event pairs, 9 based on Foata normal form. 13/93 useless extension candidates. Maximal degree in co-relation 184. Up to 50 conditions per place. [2023-08-30 04:02:22,124 INFO L137 encePairwiseOnDemand]: 364/368 looper letters, 27 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-30 04:02:22,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 143 flow [2023-08-30 04:02:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:02:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:02:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 695 transitions. [2023-08-30 04:02:22,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47214673913043476 [2023-08-30 04:02:22,126 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 695 transitions. [2023-08-30 04:02:22,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 695 transitions. [2023-08-30 04:02:22,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:02:22,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 695 transitions. [2023-08-30 04:02:22,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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) [2023-08-30 04:02:22,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 368.0) internal successors, (1840), 5 states have internal predecessors, (1840), 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) [2023-08-30 04:02:22,130 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 368.0) internal successors, (1840), 5 states have internal predecessors, (1840), 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) [2023-08-30 04:02:22,130 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 166 flow. Second operand 4 states and 695 transitions. [2023-08-30 04:02:22,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 143 flow [2023-08-30 04:02:22,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 37 transitions, 137 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:02:22,131 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 57 flow [2023-08-30 04:02:22,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=57, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-30 04:02:22,132 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -39 predicate places. [2023-08-30 04:02:22,132 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 57 flow [2023-08-30 04:02:22,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 167.875) internal successors, (1343), 8 states have internal predecessors, (1343), 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) [2023-08-30 04:02:22,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:22,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:02:22,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 04:02:22,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:02:22,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-30 04:02:22,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:22,348 INFO L85 PathProgramCache]: Analyzing trace with hash -883872492, now seen corresponding path program 1 times [2023-08-30 04:02:22,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:22,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591850963] [2023-08-30 04:02:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:22,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:22,359 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:02:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:02:22,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:02:22,380 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:02:22,381 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2023-08-30 04:02:22,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2023-08-30 04:02:22,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-08-30 04:02:22,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-08-30 04:02:22,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-08-30 04:02:22,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-08-30 04:02:22,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2023-08-30 04:02:22,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-08-30 04:02:22,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-08-30 04:02:22,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-08-30 04:02:22,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (4 of 15 remaining) [2023-08-30 04:02:22,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 15 remaining) [2023-08-30 04:02:22,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2023-08-30 04:02:22,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2023-08-30 04:02:22,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2023-08-30 04:02:22,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:02:22,388 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:02:22,390 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:02:22,390 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:02:22,438 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-30 04:02:22,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 324 transitions, 696 flow [2023-08-30 04:02:22,546 INFO L130 PetriNetUnfolder]: 197/1181 cut-off events. [2023-08-30 04:02:22,546 INFO L131 PetriNetUnfolder]: For 72/75 co-relation queries the response was YES. [2023-08-30 04:02:22,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 1181 events. 197/1181 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 7251 event pairs, 1 based on Foata normal form. 0/885 useless extension candidates. Maximal degree in co-relation 720. Up to 32 conditions per place. [2023-08-30 04:02:22,559 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 324 transitions, 696 flow [2023-08-30 04:02:22,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 324 transitions, 696 flow [2023-08-30 04:02:22,571 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:02:22,571 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 324 transitions, 696 flow [2023-08-30 04:02:22,571 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 324 transitions, 696 flow [2023-08-30 04:02:22,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 324 transitions, 696 flow [2023-08-30 04:02:22,696 INFO L130 PetriNetUnfolder]: 197/1181 cut-off events. [2023-08-30 04:02:22,696 INFO L131 PetriNetUnfolder]: For 72/75 co-relation queries the response was YES. [2023-08-30 04:02:22,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 1181 events. 197/1181 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 7251 event pairs, 1 based on Foata normal form. 0/885 useless extension candidates. Maximal degree in co-relation 720. Up to 32 conditions per place. [2023-08-30 04:02:22,743 INFO L119 LiptonReduction]: Number of co-enabled transitions 61560 [2023-08-30 04:02:26,486 INFO L134 LiptonReduction]: Checked pairs total: 133289 [2023-08-30 04:02:26,487 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-30 04:02:26,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:02:26,498 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;@7a798079, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:02:26,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-08-30 04:02:26,503 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:02:26,503 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:02:26,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:02:26,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:02:26,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-30 04:02:26,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:02:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash 47896, now seen corresponding path program 1 times [2023-08-30 04:02:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:02:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951798591] [2023-08-30 04:02:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:02:26,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:02:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:02:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:02:26,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:02:26,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951798591] [2023-08-30 04:02:26,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951798591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:02:26,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:02:26,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:02:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782934745] [2023-08-30 04:02:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:02:26,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:02:26,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:02:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:02:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:02:26,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 543 [2023-08-30 04:02:26,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 161 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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) [2023-08-30 04:02:26,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:02:26,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 543 [2023-08-30 04:02:26,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand