./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_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_10-ptrmunge_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 337bc30baab893db6c1e898eac989d238a0e57740b5469c94ed68dbaffc92f80 --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 21:40:29,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:40:29,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:40:29,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:40:29,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:40:29,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:40:29,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:40:29,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:40:29,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:40:29,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:40:29,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:40:29,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:40:29,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:40:29,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:40:29,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:40:29,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:40:29,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:40:29,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:40:29,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:40:29,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:40:29,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:40:29,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:40:29,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:40:29,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:40:29,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:40:29,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:40:29,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:40:29,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:40:29,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:40:29,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:40:29,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:40:29,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:40:29,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:40:29,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:40:29,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:40:29,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:40:29,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:40:29,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:40:29,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:40:29,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:40:29,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:40:29,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:40:29,950 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:40:29,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:40:29,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:40:29,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:40:29,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:40:29,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:40:29,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:40:29,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:40:29,954 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:40:29,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:40:29,955 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:40:29,955 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:40:29,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:40:29,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:40:29,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:40:29,956 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:40:29,956 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:40:29,956 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:40:29,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:40:29,957 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:40:29,957 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:40:29,957 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:40:29,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:40:29,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:40:29,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:40:29,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:40:29,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:40:29,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:40:29,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:40:29,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:40:29,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:40:29,959 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:40:29,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:40:29,960 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:40:29,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 337bc30baab893db6c1e898eac989d238a0e57740b5469c94ed68dbaffc92f80 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:40:30,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:40:30,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:40:30,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:40:30,273 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:40:30,273 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:40:30,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-08-29 21:40:31,457 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:40:31,739 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:40:31,740 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-08-29 21:40:31,753 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1055b83f6/5045756af2f54de59271dbf26c2c7012/FLAGf7f79318e [2023-08-29 21:40:31,767 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1055b83f6/5045756af2f54de59271dbf26c2c7012 [2023-08-29 21:40:31,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:40:31,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:40:31,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:40:31,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:40:31,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:40:31,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:40:31" (1/1) ... [2023-08-29 21:40:31,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eed2e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:31, skipping insertion in model container [2023-08-29 21:40:31,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:40:31" (1/1) ... [2023-08-29 21:40:31,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:40:31,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:40:32,086 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_10-ptrmunge_racefree.i[30176,30189] [2023-08-29 21:40:32,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:40:32,135 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:40:32,172 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_10-ptrmunge_racefree.i[30176,30189] [2023-08-29 21:40:32,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:40:32,234 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:40:32,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32 WrapperNode [2023-08-29 21:40:32,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:40:32,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:40:32,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:40:32,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:40:32,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,295 INFO L138 Inliner]: procedures = 172, calls = 52, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 220 [2023-08-29 21:40:32,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:40:32,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:40:32,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:40:32,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:40:32,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,339 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:40:32,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:40:32,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:40:32,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:40:32,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (1/1) ... [2023-08-29 21:40:32,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:40:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:40:32,390 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 21:40:32,409 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 21:40:32,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:40:32,432 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-29 21:40:32,432 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-29 21:40:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:40:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:40:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:40:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:40:32,433 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-29 21:40:32,433 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-29 21:40:32,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:40:32,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:40:32,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:40:32,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:40:32,435 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 21:40:32,616 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:40:32,618 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:40:32,957 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:40:32,966 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:40:32,967 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-29 21:40:32,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:40:32 BoogieIcfgContainer [2023-08-29 21:40:32,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:40:32,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:40:32,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:40:32,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:40:32,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:40:31" (1/3) ... [2023-08-29 21:40:32,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe1aab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:40:32, skipping insertion in model container [2023-08-29 21:40:32,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:40:32" (2/3) ... [2023-08-29 21:40:32,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe1aab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:40:32, skipping insertion in model container [2023-08-29 21:40:32,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:40:32" (3/3) ... [2023-08-29 21:40:32,993 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_10-ptrmunge_racefree.i [2023-08-29 21:40:33,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:40:33,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-08-29 21:40:33,008 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:40:33,093 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:40:33,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:33,288 INFO L130 PetriNetUnfolder]: 58/453 cut-off events. [2023-08-29 21:40:33,289 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-29 21:40:33,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 453 events. 58/453 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2220 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-29 21:40:33,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:33,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:33,318 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:40:33,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:33,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:33,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:33,422 INFO L130 PetriNetUnfolder]: 58/453 cut-off events. [2023-08-29 21:40:33,423 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-29 21:40:33,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 453 events. 58/453 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2220 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-29 21:40:33,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 26128 [2023-08-29 21:40:38,668 INFO L134 LiptonReduction]: Checked pairs total: 59529 [2023-08-29 21:40:38,668 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-29 21:40:38,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:40:38,685 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;@254c778e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:40:38,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2023-08-29 21:40:38,687 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:40:38,687 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:40:38,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:38,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:40:38,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:40:38,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash 31927, now seen corresponding path program 1 times [2023-08-29 21:40:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:38,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363715482] [2023-08-29 21:40:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:38,909 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 21:40:38,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363715482] [2023-08-29 21:40:38,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363715482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:40:38,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:40:38,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:40:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408341980] [2023-08-29 21:40:38,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:40:38,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:40:38,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:40:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:40:39,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 451 [2023-08-29 21:40:39,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 109 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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 21:40:39,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:39,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 451 [2023-08-29 21:40:39,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:40,857 INFO L130 PetriNetUnfolder]: 12861/21594 cut-off events. [2023-08-29 21:40:40,857 INFO L131 PetriNetUnfolder]: For 165/165 co-relation queries the response was YES. [2023-08-29 21:40:40,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41169 conditions, 21594 events. 12861/21594 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 1251. Compared 180143 event pairs, 9752 based on Foata normal form. 1969/13739 useless extension candidates. Maximal degree in co-relation 39509. Up to 15528 conditions per place. [2023-08-29 21:40:41,009 INFO L137 encePairwiseOnDemand]: 425/451 looper letters, 103 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2023-08-29 21:40:41,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 124 transitions, 480 flow [2023-08-29 21:40:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:40:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:40:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 769 transitions. [2023-08-29 21:40:41,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683665927568367 [2023-08-29 21:40:41,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 769 transitions. [2023-08-29 21:40:41,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 769 transitions. [2023-08-29 21:40:41,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:41,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 769 transitions. [2023-08-29 21:40:41,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 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 21:40:41,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 451.0) internal successors, (1804), 4 states have internal predecessors, (1804), 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 21:40:41,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 451.0) internal successors, (1804), 4 states have internal predecessors, (1804), 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 21:40:41,042 INFO L175 Difference]: Start difference. First operand has 88 places, 109 transitions, 240 flow. Second operand 3 states and 769 transitions. [2023-08-29 21:40:41,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 124 transitions, 480 flow [2023-08-29 21:40:41,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 124 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:40:41,049 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 196 flow [2023-08-29 21:40:41,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2023-08-29 21:40:41,054 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2023-08-29 21:40:41,054 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 196 flow [2023-08-29 21:40:41,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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 21:40:41,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:41,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:40:41,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:40:41,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:40:41,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash 31928, now seen corresponding path program 1 times [2023-08-29 21:40:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:41,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905498603] [2023-08-29 21:40:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:41,197 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 21:40:41,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:41,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905498603] [2023-08-29 21:40:41,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905498603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:40:41,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:40:41,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:40:41,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100655813] [2023-08-29 21:40:41,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:40:41,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:40:41,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:41,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:40:41,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:40:41,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 451 [2023-08-29 21:40:41,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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 21:40:41,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:41,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 451 [2023-08-29 21:40:41,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:42,824 INFO L130 PetriNetUnfolder]: 12563/21174 cut-off events. [2023-08-29 21:40:42,825 INFO L131 PetriNetUnfolder]: For 572/572 co-relation queries the response was YES. [2023-08-29 21:40:42,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41026 conditions, 21174 events. 12563/21174 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 175588 event pairs, 5840 based on Foata normal form. 0/12317 useless extension candidates. Maximal degree in co-relation 39779. Up to 19195 conditions per place. [2023-08-29 21:40:42,947 INFO L137 encePairwiseOnDemand]: 447/451 looper letters, 84 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-29 21:40:42,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 408 flow [2023-08-29 21:40:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:40:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:40:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 718 transitions. [2023-08-29 21:40:42,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306725794530672 [2023-08-29 21:40:42,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 718 transitions. [2023-08-29 21:40:42,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 718 transitions. [2023-08-29 21:40:42,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:42,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 718 transitions. [2023-08-29 21:40:42,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 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 21:40:42,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 451.0) internal successors, (1804), 4 states have internal predecessors, (1804), 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 21:40:42,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 451.0) internal successors, (1804), 4 states have internal predecessors, (1804), 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 21:40:42,957 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 196 flow. Second operand 3 states and 718 transitions. [2023-08-29 21:40:42,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 408 flow [2023-08-29 21:40:42,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 105 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:40:42,972 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 202 flow [2023-08-29 21:40:42,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2023-08-29 21:40:42,973 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -1 predicate places. [2023-08-29 21:40:42,973 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 202 flow [2023-08-29 21:40:42,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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 21:40:42,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:42,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:40:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:40:42,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:40:42,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:42,978 INFO L85 PathProgramCache]: Analyzing trace with hash 951960119, now seen corresponding path program 1 times [2023-08-29 21:40:42,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:42,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894241496] [2023-08-29 21:40:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:42,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:43,087 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 21:40:43,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:43,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894241496] [2023-08-29 21:40:43,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894241496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:40:43,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135782298] [2023-08-29 21:40:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:43,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:40:43,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:40:43,092 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 21:40:43,099 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 21:40:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:43,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:40:43,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:40:43,263 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 [2023-08-29 21:40:43,320 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 21:40:43,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:40:43,388 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 21:40:43,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135782298] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:40:43,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:40:43,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:40:43,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290429998] [2023-08-29 21:40:43,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:40:43,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:40:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:40:43,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:40:43,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 451 [2023-08-29 21:40:43,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 206.875) internal successors, (1655), 8 states have internal predecessors, (1655), 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 21:40:43,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:43,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 451 [2023-08-29 21:40:43,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:43,883 INFO L130 PetriNetUnfolder]: 39/129 cut-off events. [2023-08-29 21:40:43,883 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:40:43,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 129 events. 39/129 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 567 event pairs, 0 based on Foata normal form. 20/121 useless extension candidates. Maximal degree in co-relation 292. Up to 78 conditions per place. [2023-08-29 21:40:43,884 INFO L137 encePairwiseOnDemand]: 447/451 looper letters, 31 selfloop transitions, 2 changer transitions 11/53 dead transitions. [2023-08-29 21:40:43,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 203 flow [2023-08-29 21:40:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:40:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:40:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 865 transitions. [2023-08-29 21:40:43,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.479490022172949 [2023-08-29 21:40:43,888 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 865 transitions. [2023-08-29 21:40:43,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 865 transitions. [2023-08-29 21:40:43,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:43,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 865 transitions. [2023-08-29 21:40:43,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.25) internal successors, (865), 4 states have internal predecessors, (865), 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 21:40:43,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:43,895 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:43,895 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 202 flow. Second operand 4 states and 865 transitions. [2023-08-29 21:40:43,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 203 flow [2023-08-29 21:40:43,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 197 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:40:43,897 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 63 flow [2023-08-29 21:40:43,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-29 21:40:43,898 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -49 predicate places. [2023-08-29 21:40:43,898 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 63 flow [2023-08-29 21:40:43,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 206.875) internal successors, (1655), 8 states have internal predecessors, (1655), 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 21:40:43,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:43,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:40:43,908 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 21:40:44,104 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 [2023-08-29 21:40:44,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:40:44,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:44,106 INFO L85 PathProgramCache]: Analyzing trace with hash 6225277, now seen corresponding path program 1 times [2023-08-29 21:40:44,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:44,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494395872] [2023-08-29 21:40:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:44,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:44,297 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 21:40:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:44,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494395872] [2023-08-29 21:40:44,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494395872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:40:44,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:40:44,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:40:44,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242800535] [2023-08-29 21:40:44,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:40:44,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:40:44,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:40:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:40:44,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 451 [2023-08-29 21:40:44,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 63 flow. Second operand has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 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 21:40:44,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:44,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 451 [2023-08-29 21:40:44,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:44,524 INFO L130 PetriNetUnfolder]: 22/79 cut-off events. [2023-08-29 21:40:44,525 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-29 21:40:44,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 79 events. 22/79 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 217 event pairs, 0 based on Foata normal form. 3/70 useless extension candidates. Maximal degree in co-relation 155. Up to 55 conditions per place. [2023-08-29 21:40:44,525 INFO L137 encePairwiseOnDemand]: 444/451 looper letters, 15 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-29 21:40:44,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 93 flow [2023-08-29 21:40:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:40:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:40:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 838 transitions. [2023-08-29 21:40:44,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46452328159645234 [2023-08-29 21:40:44,528 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 838 transitions. [2023-08-29 21:40:44,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 838 transitions. [2023-08-29 21:40:44,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:44,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 838 transitions. [2023-08-29 21:40:44,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 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 21:40:44,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:44,535 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:44,535 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 63 flow. Second operand 4 states and 838 transitions. [2023-08-29 21:40:44,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 93 flow [2023-08-29 21:40:44,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 89 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:40:44,537 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 54 flow [2023-08-29 21:40:44,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2023-08-29 21:40:44,539 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -58 predicate places. [2023-08-29 21:40:44,539 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 54 flow [2023-08-29 21:40:44,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.2) internal successors, (1026), 5 states have internal predecessors, (1026), 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 21:40:44,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:44,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:40:44,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:40:44,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:40:44,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:44,541 INFO L85 PathProgramCache]: Analyzing trace with hash 6225439, now seen corresponding path program 1 times [2023-08-29 21:40:44,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:44,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090216277] [2023-08-29 21:40:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:44,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:44,698 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 21:40:44,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:44,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090216277] [2023-08-29 21:40:44,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090216277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:40:44,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:40:44,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:40:44,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479013103] [2023-08-29 21:40:44,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:40:44,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:40:44,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:44,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:40:44,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:40:44,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 451 [2023-08-29 21:40:44,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 54 flow. Second operand has 5 states, 5 states have (on average 203.2) internal successors, (1016), 5 states have internal predecessors, (1016), 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 21:40:44,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:44,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 451 [2023-08-29 21:40:44,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:44,891 INFO L130 PetriNetUnfolder]: 20/87 cut-off events. [2023-08-29 21:40:44,891 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:40:44,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 87 events. 20/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 308 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 173. Up to 24 conditions per place. [2023-08-29 21:40:44,892 INFO L137 encePairwiseOnDemand]: 446/451 looper letters, 20 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-29 21:40:44,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 126 flow [2023-08-29 21:40:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:40:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:40:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 834 transitions. [2023-08-29 21:40:44,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623059866962306 [2023-08-29 21:40:44,895 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 834 transitions. [2023-08-29 21:40:44,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 834 transitions. [2023-08-29 21:40:44,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:44,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 834 transitions. [2023-08-29 21:40:44,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.5) internal successors, (834), 4 states have internal predecessors, (834), 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 21:40:44,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:44,901 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:44,901 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 54 flow. Second operand 4 states and 834 transitions. [2023-08-29 21:40:44,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 126 flow [2023-08-29 21:40:44,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:40:44,902 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 72 flow [2023-08-29 21:40:44,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-29 21:40:44,902 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -56 predicate places. [2023-08-29 21:40:44,903 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 72 flow [2023-08-29 21:40:44,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.2) internal successors, (1016), 5 states have internal predecessors, (1016), 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 21:40:44,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:44,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:40:44,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:40:44,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:40:44,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash 6225276, now seen corresponding path program 1 times [2023-08-29 21:40:44,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:44,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751939107] [2023-08-29 21:40:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:44,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:44,974 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 21:40:44,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:44,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751939107] [2023-08-29 21:40:44,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751939107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:40:44,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:40:44,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:40:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910264580] [2023-08-29 21:40:44,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:40:44,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:40:44,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:44,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:40:44,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:40:45,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 451 [2023-08-29 21:40:45,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 195.2) internal successors, (976), 5 states have internal predecessors, (976), 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 21:40:45,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:45,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 451 [2023-08-29 21:40:45,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:45,171 INFO L130 PetriNetUnfolder]: 16/64 cut-off events. [2023-08-29 21:40:45,171 INFO L131 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2023-08-29 21:40:45,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 64 events. 16/64 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 182 event pairs, 3 based on Foata normal form. 10/69 useless extension candidates. Maximal degree in co-relation 159. Up to 45 conditions per place. [2023-08-29 21:40:45,172 INFO L137 encePairwiseOnDemand]: 444/451 looper letters, 7 selfloop transitions, 2 changer transitions 10/21 dead transitions. [2023-08-29 21:40:45,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 21 transitions, 103 flow [2023-08-29 21:40:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:40:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:40:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2023-08-29 21:40:45,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2023-08-29 21:40:45,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2023-08-29 21:40:45,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2023-08-29 21:40:45,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:45,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2023-08-29 21:40:45,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 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 21:40:45,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:45,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:45,183 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 72 flow. Second operand 4 states and 796 transitions. [2023-08-29 21:40:45,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 21 transitions, 103 flow [2023-08-29 21:40:45,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 21 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:40:45,185 INFO L231 Difference]: Finished difference. Result has 29 places, 10 transitions, 42 flow [2023-08-29 21:40:45,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=42, PETRI_PLACES=29, PETRI_TRANSITIONS=10} [2023-08-29 21:40:45,187 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -59 predicate places. [2023-08-29 21:40:45,187 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 10 transitions, 42 flow [2023-08-29 21:40:45,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.2) internal successors, (976), 5 states have internal predecessors, (976), 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 21:40:45,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:45,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:40:45,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:40:45,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2023-08-29 21:40:45,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:45,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1181519801, now seen corresponding path program 1 times [2023-08-29 21:40:45,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:45,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214780828] [2023-08-29 21:40:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:45,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:45,355 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 21:40:45,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:45,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214780828] [2023-08-29 21:40:45,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214780828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:40:45,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448608685] [2023-08-29 21:40:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:45,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:40:45,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:40:45,358 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 21:40:45,361 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 21:40:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:45,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-29 21:40:45,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:40:45,531 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 21:40:45,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 21:40:45,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 21:40:45,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 21:40:45,642 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 21:40:45,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:40:45,661 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_59 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1_ids~0#1.base| v_ArrVal_59) |c_t1_funThread1of1ForFork1_munge_~v#1.base|) |c_t1_funThread1of1ForFork1_munge_~v#1.offset|) 0)) is different from false [2023-08-29 21:40:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-29 21:40:45,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448608685] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:40:45,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:40:45,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-29 21:40:45,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670123025] [2023-08-29 21:40:45,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:40:45,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 21:40:45,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 21:40:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=4, NotChecked=14, Total=90 [2023-08-29 21:40:45,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 451 [2023-08-29 21:40:45,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 10 transitions, 42 flow. Second operand has 10 states, 10 states have (on average 162.3) internal successors, (1623), 10 states have internal predecessors, (1623), 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 21:40:45,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:45,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 451 [2023-08-29 21:40:45,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:40:45,764 INFO L130 PetriNetUnfolder]: 3/22 cut-off events. [2023-08-29 21:40:45,765 INFO L131 PetriNetUnfolder]: For 14/15 co-relation queries the response was YES. [2023-08-29 21:40:45,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 22 events. 3/22 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 1 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 63. Up to 11 conditions per place. [2023-08-29 21:40:45,765 INFO L137 encePairwiseOnDemand]: 448/451 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-29 21:40:45,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 10 transitions, 57 flow [2023-08-29 21:40:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:40:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:40:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-29 21:40:45,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2023-08-29 21:40:45,768 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-29 21:40:45,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-29 21:40:45,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:40:45,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-29 21:40:45,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 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 21:40:45,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:45,773 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 451.0) internal successors, (2255), 5 states have internal predecessors, (2255), 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 21:40:45,773 INFO L175 Difference]: Start difference. First operand has 29 places, 10 transitions, 42 flow. Second operand 4 states and 649 transitions. [2023-08-29 21:40:45,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 10 transitions, 57 flow [2023-08-29 21:40:45,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 51 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:40:45,774 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-29 21:40:45,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=451, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-29 21:40:45,775 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -68 predicate places. [2023-08-29 21:40:45,775 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-29 21:40:45,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.3) internal successors, (1623), 10 states have internal predecessors, (1623), 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 21:40:45,778 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 53 remaining) [2023-08-29 21:40:45,779 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK (51 of 53 remaining) [2023-08-29 21:40:45,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 53 remaining) [2023-08-29 21:40:45,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK (49 of 53 remaining) [2023-08-29 21:40:45,782 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 53 remaining) [2023-08-29 21:40:45,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 53 remaining) [2023-08-29 21:40:45,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 53 remaining) [2023-08-29 21:40:45,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 53 remaining) [2023-08-29 21:40:45,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 53 remaining) [2023-08-29 21:40:45,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 53 remaining) [2023-08-29 21:40:45,785 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 53 remaining) [2023-08-29 21:40:45,785 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 53 remaining) [2023-08-29 21:40:45,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 53 remaining) [2023-08-29 21:40:45,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 53 remaining) [2023-08-29 21:40:45,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 53 remaining) [2023-08-29 21:40:45,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 53 remaining) [2023-08-29 21:40:45,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 53 remaining) [2023-08-29 21:40:45,786 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 53 remaining) [2023-08-29 21:40:45,787 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 53 remaining) [2023-08-29 21:40:45,787 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10ASSERT_VIOLATIONMEMORY_LEAK (33 of 53 remaining) [2023-08-29 21:40:45,787 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 53 remaining) [2023-08-29 21:40:45,787 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 53 remaining) [2023-08-29 21:40:45,787 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 53 remaining) [2023-08-29 21:40:45,787 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 53 remaining) [2023-08-29 21:40:45,788 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 53 remaining) [2023-08-29 21:40:45,788 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 53 remaining) [2023-08-29 21:40:45,788 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 53 remaining) [2023-08-29 21:40:45,788 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 53 remaining) [2023-08-29 21:40:45,788 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 53 remaining) [2023-08-29 21:40:45,789 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 53 remaining) [2023-08-29 21:40:45,789 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 53 remaining) [2023-08-29 21:40:45,789 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 53 remaining) [2023-08-29 21:40:45,789 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 53 remaining) [2023-08-29 21:40:45,789 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 53 remaining) [2023-08-29 21:40:45,789 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 53 remaining) [2023-08-29 21:40:45,790 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 53 remaining) [2023-08-29 21:40:45,790 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 53 remaining) [2023-08-29 21:40:45,790 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 53 remaining) [2023-08-29 21:40:45,790 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 53 remaining) [2023-08-29 21:40:45,790 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 53 remaining) [2023-08-29 21:40:45,790 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 53 remaining) [2023-08-29 21:40:45,791 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 53 remaining) [2023-08-29 21:40:45,791 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 53 remaining) [2023-08-29 21:40:45,791 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 53 remaining) [2023-08-29 21:40:45,791 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 53 remaining) [2023-08-29 21:40:45,791 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 53 remaining) [2023-08-29 21:40:45,791 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (6 of 53 remaining) [2023-08-29 21:40:45,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 53 remaining) [2023-08-29 21:40:45,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 53 remaining) [2023-08-29 21:40:45,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 53 remaining) [2023-08-29 21:40:45,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 53 remaining) [2023-08-29 21:40:45,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 53 remaining) [2023-08-29 21:40:45,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 53 remaining) [2023-08-29 21:40:45,804 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 21:40:45,998 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 21:40:45,998 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:40:46,000 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 (1/2) [2023-08-29 21:40:46,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:46,047 INFO L130 PetriNetUnfolder]: 58/453 cut-off events. [2023-08-29 21:40:46,047 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-29 21:40:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 453 events. 58/453 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2220 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-29 21:40:46,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:46,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:46,053 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:40:46,053 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:46,054 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:46,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 249 transitions, 520 flow [2023-08-29 21:40:46,095 INFO L130 PetriNetUnfolder]: 58/453 cut-off events. [2023-08-29 21:40:46,095 INFO L131 PetriNetUnfolder]: For 8/12 co-relation queries the response was YES. [2023-08-29 21:40:46,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 453 events. 58/453 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2220 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 243. Up to 8 conditions per place. [2023-08-29 21:40:46,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 26128 [2023-08-29 21:40:50,893 INFO L134 LiptonReduction]: Checked pairs total: 58942 [2023-08-29 21:40:50,893 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-29 21:40:50,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:40:50,895 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;@254c778e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:40:50,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-29 21:40:50,900 INFO L130 PetriNetUnfolder]: 2/45 cut-off events. [2023-08-29 21:40:50,900 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:40:50,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:50,901 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:40:50,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:40:50,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:50,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1154119880, now seen corresponding path program 1 times [2023-08-29 21:40:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:50,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927248076] [2023-08-29 21:40:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:50,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:40:50,917 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:40:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:40:50,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:40:50,939 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:40:50,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-29 21:40:50,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-29 21:40:50,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:40:50,940 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:40:50,941 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-29 21:40:50,941 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:40:50,941 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:40:51,010 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-29 21:40:51,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 397 transitions, 842 flow [2023-08-29 21:40:51,244 INFO L130 PetriNetUnfolder]: 197/1322 cut-off events. [2023-08-29 21:40:51,244 INFO L131 PetriNetUnfolder]: For 72/81 co-relation queries the response was YES. [2023-08-29 21:40:51,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 1322 events. 197/1322 cut-off events. For 72/81 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8758 event pairs, 1 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 796. Up to 32 conditions per place. [2023-08-29 21:40:51,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 397 transitions, 842 flow [2023-08-29 21:40:51,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 397 transitions, 842 flow [2023-08-29 21:40:51,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:40:51,299 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 346 places, 397 transitions, 842 flow [2023-08-29 21:40:51,300 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 346 places, 397 transitions, 842 flow [2023-08-29 21:40:51,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 397 transitions, 842 flow [2023-08-29 21:40:51,535 INFO L130 PetriNetUnfolder]: 197/1322 cut-off events. [2023-08-29 21:40:51,536 INFO L131 PetriNetUnfolder]: For 72/81 co-relation queries the response was YES. [2023-08-29 21:40:51,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 1322 events. 197/1322 cut-off events. For 72/81 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8758 event pairs, 1 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 796. Up to 32 conditions per place. [2023-08-29 21:40:51,644 INFO L119 LiptonReduction]: Number of co-enabled transitions 95424 [2023-08-29 21:40:57,674 INFO L134 LiptonReduction]: Checked pairs total: 246686 [2023-08-29 21:40:57,674 INFO L136 LiptonReduction]: Total number of compositions: 304 [2023-08-29 21:40:57,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:40:57,676 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;@254c778e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:40:57,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-08-29 21:40:57,678 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:40:57,678 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:40:57,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:40:57,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:40:57,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-08-29 21:40:57,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:40:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash 65480, now seen corresponding path program 1 times [2023-08-29 21:40:57,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:40:57,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430863351] [2023-08-29 21:40:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:40:57,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:40:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:40:57,723 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 21:40:57,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:40:57,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430863351] [2023-08-29 21:40:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430863351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:40:57,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:40:57,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:40:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166453879] [2023-08-29 21:40:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:40:57,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:40:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:40:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:40:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:40:57,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 701 [2023-08-29 21:40:57,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 195 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 324.6666666666667) internal successors, (974), 3 states have internal predecessors, (974), 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 21:40:57,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:40:57,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 701 [2023-08-29 21:40:57,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand