./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/ldv-races/race-4_1-thread_local_vars.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 a9552a698db9701543deeff63aa990ab8fc4764b65dba5035623425bdf77554d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 23:54:37,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 23:54:37,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 23:54:37,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 23:54:37,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 23:54:37,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 23:54:37,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 23:54:37,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 23:54:37,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 23:54:37,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 23:54:37,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 23:54:37,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 23:54:37,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 23:54:37,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 23:54:37,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 23:54:37,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 23:54:37,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 23:54:37,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 23:54:37,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 23:54:37,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 23:54:37,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 23:54:37,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 23:54:37,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 23:54:37,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 23:54:37,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 23:54:37,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 23:54:37,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 23:54:37,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 23:54:37,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 23:54:37,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 23:54:37,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 23:54:37,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 23:54:37,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 23:54:37,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 23:54:37,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 23:54:37,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 23:54:37,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 23:54:37,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 23:54:37,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 23:54:37,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 23:54:37,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 23:54:37,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 23:54:37,823 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 23:54:37,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 23:54:37,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 23:54:37,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 23:54:37,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 23:54:37,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 23:54:37,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 23:54:37,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 23:54:37,826 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 23:54:37,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 23:54:37,827 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 23:54:37,827 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 23:54:37,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 23:54:37,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 23:54:37,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 23:54:37,827 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 23:54:37,828 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 23:54:37,828 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 23:54:37,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 23:54:37,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 23:54:37,828 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 23:54:37,828 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 23:54:37,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 23:54:37,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 23:54:37,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 23:54:37,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 23:54:37,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 23:54:37,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 23:54:37,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 23:54:37,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 23:54:37,830 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 23:54:37,830 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 23:54:37,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 23:54:37,830 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 23:54:37,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9552a698db9701543deeff63aa990ab8fc4764b65dba5035623425bdf77554d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 23:54:38,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 23:54:38,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 23:54:38,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 23:54:38,083 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 23:54:38,083 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 23:54:38,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i [2023-08-31 23:54:39,162 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 23:54:39,440 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 23:54:39,440 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i [2023-08-31 23:54:39,455 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75b1da74c/9b07185d5cda4c6a9e10459aa46f4177/FLAG861f5dec2 [2023-08-31 23:54:39,465 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75b1da74c/9b07185d5cda4c6a9e10459aa46f4177 [2023-08-31 23:54:39,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 23:54:39,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 23:54:39,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 23:54:39,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 23:54:39,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 23:54:39,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:54:39" (1/1) ... [2023-08-31 23:54:39,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b007ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:39, skipping insertion in model container [2023-08-31 23:54:39,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:54:39" (1/1) ... [2023-08-31 23:54:39,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 23:54:39,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 23:54:39,895 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i[76081,76094] [2023-08-31 23:54:39,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 23:54:39,970 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 23:54:40,012 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i[76081,76094] [2023-08-31 23:54:40,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 23:54:40,117 INFO L208 MainTranslator]: Completed translation [2023-08-31 23:54:40,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40 WrapperNode [2023-08-31 23:54:40,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 23:54:40,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 23:54:40,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 23:54:40,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 23:54:40,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,184 INFO L138 Inliner]: procedures = 486, calls = 43, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 205 [2023-08-31 23:54:40,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 23:54:40,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 23:54:40,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 23:54:40,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 23:54:40,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,229 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 23:54:40,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 23:54:40,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 23:54:40,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 23:54:40,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (1/1) ... [2023-08-31 23:54:40,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 23:54:40,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 23:54:40,261 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) [2023-08-31 23:54:40,300 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 [2023-08-31 23:54:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure thread_usb [2023-08-31 23:54:40,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_usb [2023-08-31 23:54:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 23:54:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 23:54:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread_ath9k [2023-08-31 23:54:40,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_ath9k [2023-08-31 23:54:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 23:54:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 23:54:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-31 23:54:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 23:54:40,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 23:54:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 23:54:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 23:54:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 23:54:40,322 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 23:54:40,587 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 23:54:40,592 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 23:54:40,800 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 23:54:40,806 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 23:54:40,806 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 23:54:40,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:54:40 BoogieIcfgContainer [2023-08-31 23:54:40,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 23:54:40,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 23:54:40,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 23:54:40,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 23:54:40,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 11:54:39" (1/3) ... [2023-08-31 23:54:40,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670bf483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:54:40, skipping insertion in model container [2023-08-31 23:54:40,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:54:40" (2/3) ... [2023-08-31 23:54:40,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670bf483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:54:40, skipping insertion in model container [2023-08-31 23:54:40,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:54:40" (3/3) ... [2023-08-31 23:54:40,813 INFO L112 eAbstractionObserver]: Analyzing ICFG race-4_1-thread_local_vars.i [2023-08-31 23:54:40,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 23:54:40,840 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-08-31 23:54:40,841 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 23:54:40,908 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 23:54:40,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 324 transitions, 678 flow [2023-08-31 23:54:41,049 INFO L130 PetriNetUnfolder]: 33/339 cut-off events. [2023-08-31 23:54:41,049 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 23:54:41,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 339 events. 33/339 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 913 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2023-08-31 23:54:41,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 324 transitions, 678 flow [2023-08-31 23:54:41,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 209 transitions, 435 flow [2023-08-31 23:54:41,067 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 23:54:41,073 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 209 transitions, 435 flow [2023-08-31 23:54:41,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 209 transitions, 435 flow [2023-08-31 23:54:41,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 209 transitions, 435 flow [2023-08-31 23:54:41,134 INFO L130 PetriNetUnfolder]: 31/310 cut-off events. [2023-08-31 23:54:41,134 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 23:54:41,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 310 events. 31/310 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 753 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 221. Up to 11 conditions per place. [2023-08-31 23:54:41,146 INFO L119 LiptonReduction]: Number of co-enabled transitions 10620 [2023-08-31 23:54:46,129 INFO L134 LiptonReduction]: Checked pairs total: 16739 [2023-08-31 23:54:46,130 INFO L136 LiptonReduction]: Total number of compositions: 240 [2023-08-31 23:54:46,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 23:54:46,144 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;@785cdc9f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 23:54:46,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 23:54:46,150 INFO L130 PetriNetUnfolder]: 9/51 cut-off events. [2023-08-31 23:54:46,150 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 23:54:46,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:46,151 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:46,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread_usbThread1of1ForFork1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_usbThread1of1ForFork1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 23:54:46,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1195978625, now seen corresponding path program 1 times [2023-08-31 23:54:46,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:46,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623027303] [2023-08-31 23:54:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:46,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:46,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:46,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623027303] [2023-08-31 23:54:46,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623027303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:46,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:46,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 23:54:46,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849894374] [2023-08-31 23:54:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:46,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:46,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:46,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:46,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 564 [2023-08-31 23:54:46,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 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) [2023-08-31 23:54:46,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:46,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 564 [2023-08-31 23:54:46,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:46,620 INFO L130 PetriNetUnfolder]: 205/404 cut-off events. [2023-08-31 23:54:46,621 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 23:54:46,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 404 events. 205/404 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1779 event pairs, 82 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 574. Up to 242 conditions per place. [2023-08-31 23:54:46,623 INFO L137 encePairwiseOnDemand]: 555/564 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-31 23:54:46,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 193 flow [2023-08-31 23:54:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 885 transitions. [2023-08-31 23:54:46,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230496453900709 [2023-08-31 23:54:46,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 885 transitions. [2023-08-31 23:54:46,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 885 transitions. [2023-08-31 23:54:46,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:46,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 885 transitions. [2023-08-31 23:54:46,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 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) [2023-08-31 23:54:46,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 564.0) internal successors, (2256), 4 states have internal predecessors, (2256), 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) [2023-08-31 23:54:46,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 564.0) internal successors, (2256), 4 states have internal predecessors, (2256), 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) [2023-08-31 23:54:46,649 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 107 flow. Second operand 3 states and 885 transitions. [2023-08-31 23:54:46,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 193 flow [2023-08-31 23:54:46,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 183 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 23:54:46,652 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-31 23:54:46,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=564, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-31 23:54:46,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-08-31 23:54:46,655 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-31 23:54:46,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 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) [2023-08-31 23:54:46,657 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbThread1of1ForFork1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-31 23:54:46,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-31 23:54:46,658 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-31 23:54:46,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 23:54:46,658 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 23:54:46,660 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-31 23:54:46,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 324 transitions, 678 flow [2023-08-31 23:54:46,693 INFO L130 PetriNetUnfolder]: 33/339 cut-off events. [2023-08-31 23:54:46,693 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 23:54:46,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 339 events. 33/339 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 913 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2023-08-31 23:54:46,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 324 transitions, 678 flow [2023-08-31 23:54:46,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 227 transitions, 471 flow [2023-08-31 23:54:46,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 23:54:46,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 227 transitions, 471 flow [2023-08-31 23:54:46,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 227 transitions, 471 flow [2023-08-31 23:54:46,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 227 transitions, 471 flow [2023-08-31 23:54:46,714 INFO L130 PetriNetUnfolder]: 33/339 cut-off events. [2023-08-31 23:54:46,714 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 23:54:46,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 339 events. 33/339 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 917 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2023-08-31 23:54:46,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 10740 [2023-08-31 23:54:52,010 INFO L134 LiptonReduction]: Checked pairs total: 16699 [2023-08-31 23:54:52,010 INFO L136 LiptonReduction]: Total number of compositions: 269 [2023-08-31 23:54:52,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 23:54:52,012 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;@785cdc9f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 23:54:52,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-08-31 23:54:52,013 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 23:54:52,013 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 23:54:52,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:52,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 23:54:52,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:52,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:52,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1231, now seen corresponding path program 1 times [2023-08-31 23:54:52,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:52,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531372171] [2023-08-31 23:54:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:52,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:52,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531372171] [2023-08-31 23:54:52,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531372171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:52,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:52,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 23:54:52,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672427213] [2023-08-31 23:54:52,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:52,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 23:54:52,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:52,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 23:54:52,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 23:54:52,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 593 [2023-08-31 23:54:52,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 54 transitions, 125 flow. Second operand has 2 states, 2 states have (on average 294.5) internal successors, (589), 2 states have internal predecessors, (589), 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) [2023-08-31 23:54:52,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:52,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 593 [2023-08-31 23:54:52,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:52,129 INFO L130 PetriNetUnfolder]: 746/1231 cut-off events. [2023-08-31 23:54:52,130 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-31 23:54:52,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2362 conditions, 1231 events. 746/1231 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6128 event pairs, 435 based on Foata normal form. 0/587 useless extension candidates. Maximal degree in co-relation 2173. Up to 1085 conditions per place. [2023-08-31 23:54:52,134 INFO L137 encePairwiseOnDemand]: 588/593 looper letters, 34 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2023-08-31 23:54:52,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 49 transitions, 183 flow [2023-08-31 23:54:52,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 23:54:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 23:54:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 627 transitions. [2023-08-31 23:54:52,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286677908937606 [2023-08-31 23:54:52,136 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 627 transitions. [2023-08-31 23:54:52,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 627 transitions. [2023-08-31 23:54:52,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:52,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 627 transitions. [2023-08-31 23:54:52,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 313.5) internal successors, (627), 2 states have internal predecessors, (627), 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) [2023-08-31 23:54:52,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 593.0) internal successors, (1779), 3 states have internal predecessors, (1779), 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) [2023-08-31 23:54:52,140 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 593.0) internal successors, (1779), 3 states have internal predecessors, (1779), 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) [2023-08-31 23:54:52,141 INFO L175 Difference]: Start difference. First operand has 51 places, 54 transitions, 125 flow. Second operand 2 states and 627 transitions. [2023-08-31 23:54:52,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 49 transitions, 183 flow [2023-08-31 23:54:52,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 179 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:52,143 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 111 flow [2023-08-31 23:54:52,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=111, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-08-31 23:54:52,143 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-31 23:54:52,144 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 111 flow [2023-08-31 23:54:52,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 294.5) internal successors, (589), 2 states have internal predecessors, (589), 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) [2023-08-31 23:54:52,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:52,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 23:54:52,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 23:54:52,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:52,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1215912, now seen corresponding path program 1 times [2023-08-31 23:54:52,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:52,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204967941] [2023-08-31 23:54:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:52,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:52,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:52,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204967941] [2023-08-31 23:54:52,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204967941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:52,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:52,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 23:54:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702624256] [2023-08-31 23:54:52,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:52,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:52,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:52,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:52,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 593 [2023-08-31 23:54:52,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 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) [2023-08-31 23:54:52,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:52,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 593 [2023-08-31 23:54:52,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:52,416 INFO L130 PetriNetUnfolder]: 1786/2916 cut-off events. [2023-08-31 23:54:52,416 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-08-31 23:54:52,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5531 conditions, 2916 events. 1786/2916 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15564 event pairs, 619 based on Foata normal form. 0/1353 useless extension candidates. Maximal degree in co-relation 5527. Up to 1466 conditions per place. [2023-08-31 23:54:52,425 INFO L137 encePairwiseOnDemand]: 585/593 looper letters, 57 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-08-31 23:54:52,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 77 transitions, 304 flow [2023-08-31 23:54:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2023-08-31 23:54:52,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154581225407532 [2023-08-31 23:54:52,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2023-08-31 23:54:52,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2023-08-31 23:54:52,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:52,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2023-08-31 23:54:52,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 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) [2023-08-31 23:54:52,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:52,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:52,432 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 111 flow. Second operand 3 states and 917 transitions. [2023-08-31 23:54:52,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 77 transitions, 304 flow [2023-08-31 23:54:52,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 77 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 23:54:52,435 INFO L231 Difference]: Finished difference. Result has 49 places, 54 transitions, 161 flow [2023-08-31 23:54:52,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=49, PETRI_TRANSITIONS=54} [2023-08-31 23:54:52,437 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-08-31 23:54:52,438 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 54 transitions, 161 flow [2023-08-31 23:54:52,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 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) [2023-08-31 23:54:52,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:52,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 23:54:52,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 23:54:52,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:52,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1217684, now seen corresponding path program 1 times [2023-08-31 23:54:52,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:52,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938417790] [2023-08-31 23:54:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:52,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:52,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:52,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938417790] [2023-08-31 23:54:52,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938417790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:52,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:52,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:52,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327417094] [2023-08-31 23:54:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:52,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:52,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:52,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:52,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:52,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 593 [2023-08-31 23:54:52,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 54 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 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) [2023-08-31 23:54:52,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:52,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 593 [2023-08-31 23:54:52,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:52,656 INFO L130 PetriNetUnfolder]: 1426/2276 cut-off events. [2023-08-31 23:54:52,657 INFO L131 PetriNetUnfolder]: For 532/585 co-relation queries the response was YES. [2023-08-31 23:54:52,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4900 conditions, 2276 events. 1426/2276 cut-off events. For 532/585 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11129 event pairs, 691 based on Foata normal form. 5/1261 useless extension candidates. Maximal degree in co-relation 4894. Up to 2040 conditions per place. [2023-08-31 23:54:52,664 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 37 selfloop transitions, 0 changer transitions 2/55 dead transitions. [2023-08-31 23:54:52,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 241 flow [2023-08-31 23:54:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 903 transitions. [2023-08-31 23:54:52,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075885328836425 [2023-08-31 23:54:52,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 903 transitions. [2023-08-31 23:54:52,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 903 transitions. [2023-08-31 23:54:52,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:52,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 903 transitions. [2023-08-31 23:54:52,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 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) [2023-08-31 23:54:52,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:52,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:52,673 INFO L175 Difference]: Start difference. First operand has 49 places, 54 transitions, 161 flow. Second operand 3 states and 903 transitions. [2023-08-31 23:54:52,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 241 flow [2023-08-31 23:54:52,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:52,677 INFO L231 Difference]: Finished difference. Result has 50 places, 53 transitions, 147 flow [2023-08-31 23:54:52,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=50, PETRI_TRANSITIONS=53} [2023-08-31 23:54:52,678 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-08-31 23:54:52,678 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 147 flow [2023-08-31 23:54:52,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 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) [2023-08-31 23:54:52,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:52,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 23:54:52,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 23:54:52,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:52,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash 37427126, now seen corresponding path program 1 times [2023-08-31 23:54:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:52,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599103186] [2023-08-31 23:54:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:52,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:52,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599103186] [2023-08-31 23:54:52,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599103186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:52,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:52,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 23:54:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071580044] [2023-08-31 23:54:52,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:52,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 593 [2023-08-31 23:54:52,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 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) [2023-08-31 23:54:52,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:52,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 593 [2023-08-31 23:54:52,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:53,020 INFO L130 PetriNetUnfolder]: 1781/2911 cut-off events. [2023-08-31 23:54:53,020 INFO L131 PetriNetUnfolder]: For 562/727 co-relation queries the response was YES. [2023-08-31 23:54:53,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6236 conditions, 2911 events. 1781/2911 cut-off events. For 562/727 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15687 event pairs, 730 based on Foata normal form. 106/1748 useless extension candidates. Maximal degree in co-relation 6229. Up to 1598 conditions per place. [2023-08-31 23:54:53,031 INFO L137 encePairwiseOnDemand]: 588/593 looper letters, 66 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-31 23:54:53,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 85 transitions, 377 flow [2023-08-31 23:54:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 926 transitions. [2023-08-31 23:54:53,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205171444631815 [2023-08-31 23:54:53,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 926 transitions. [2023-08-31 23:54:53,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 926 transitions. [2023-08-31 23:54:53,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:53,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 926 transitions. [2023-08-31 23:54:53,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.6666666666667) internal successors, (926), 3 states have internal predecessors, (926), 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) [2023-08-31 23:54:53,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:53,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:53,040 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 147 flow. Second operand 3 states and 926 transitions. [2023-08-31 23:54:53,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 85 transitions, 377 flow [2023-08-31 23:54:53,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 85 transitions, 371 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 23:54:53,043 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 175 flow [2023-08-31 23:54:53,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-08-31 23:54:53,046 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-31 23:54:53,046 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 175 flow [2023-08-31 23:54:53,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 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) [2023-08-31 23:54:53,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:53,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 23:54:53,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 23:54:53,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:53,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash 37427124, now seen corresponding path program 1 times [2023-08-31 23:54:53,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:53,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151682001] [2023-08-31 23:54:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:53,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:53,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:53,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151682001] [2023-08-31 23:54:53,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151682001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:53,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:53,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 23:54:53,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963294905] [2023-08-31 23:54:53,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:53,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:53,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:53,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 593 [2023-08-31 23:54:53,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 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) [2023-08-31 23:54:53,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:53,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 593 [2023-08-31 23:54:53,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:53,360 INFO L130 PetriNetUnfolder]: 1547/2515 cut-off events. [2023-08-31 23:54:53,360 INFO L131 PetriNetUnfolder]: For 349/488 co-relation queries the response was YES. [2023-08-31 23:54:53,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5382 conditions, 2515 events. 1547/2515 cut-off events. For 349/488 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13049 event pairs, 787 based on Foata normal form. 136/1652 useless extension candidates. Maximal degree in co-relation 5374. Up to 2238 conditions per place. [2023-08-31 23:54:53,369 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 38 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-31 23:54:53,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 249 flow [2023-08-31 23:54:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 901 transitions. [2023-08-31 23:54:53,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064643057897695 [2023-08-31 23:54:53,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 901 transitions. [2023-08-31 23:54:53,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 901 transitions. [2023-08-31 23:54:53,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:53,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 901 transitions. [2023-08-31 23:54:53,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 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) [2023-08-31 23:54:53,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:53,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:53,377 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 175 flow. Second operand 3 states and 901 transitions. [2023-08-31 23:54:53,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 249 flow [2023-08-31 23:54:53,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 23:54:53,380 INFO L231 Difference]: Finished difference. Result has 50 places, 54 transitions, 169 flow [2023-08-31 23:54:53,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=50, PETRI_TRANSITIONS=54} [2023-08-31 23:54:53,381 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-08-31 23:54:53,381 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 54 transitions, 169 flow [2023-08-31 23:54:53,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.3333333333333) internal successors, (871), 3 states have internal predecessors, (871), 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) [2023-08-31 23:54:53,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:53,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 23:54:53,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 23:54:53,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:53,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1160281706, now seen corresponding path program 1 times [2023-08-31 23:54:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:53,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081365462] [2023-08-31 23:54:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:53,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:53,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:53,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081365462] [2023-08-31 23:54:53,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081365462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:53,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:53,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 23:54:53,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618251105] [2023-08-31 23:54:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:53,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:53,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:53,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:53,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:53,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 593 [2023-08-31 23:54:53,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 54 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 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) [2023-08-31 23:54:53,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:53,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 593 [2023-08-31 23:54:53,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:53,730 INFO L130 PetriNetUnfolder]: 2066/3340 cut-off events. [2023-08-31 23:54:53,730 INFO L131 PetriNetUnfolder]: For 368/505 co-relation queries the response was YES. [2023-08-31 23:54:53,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7054 conditions, 3340 events. 2066/3340 cut-off events. For 368/505 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18411 event pairs, 847 based on Foata normal form. 52/2047 useless extension candidates. Maximal degree in co-relation 7046. Up to 1682 conditions per place. [2023-08-31 23:54:53,749 INFO L137 encePairwiseOnDemand]: 588/593 looper letters, 66 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2023-08-31 23:54:53,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 86 transitions, 407 flow [2023-08-31 23:54:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 923 transitions. [2023-08-31 23:54:53,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188308038223721 [2023-08-31 23:54:53,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 923 transitions. [2023-08-31 23:54:53,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 923 transitions. [2023-08-31 23:54:53,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:53,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 923 transitions. [2023-08-31 23:54:53,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 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) [2023-08-31 23:54:53,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:53,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:53,756 INFO L175 Difference]: Start difference. First operand has 50 places, 54 transitions, 169 flow. Second operand 3 states and 923 transitions. [2023-08-31 23:54:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 86 transitions, 407 flow [2023-08-31 23:54:53,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 86 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 23:54:53,759 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 216 flow [2023-08-31 23:54:53,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2023-08-31 23:54:53,760 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-31 23:54:53,760 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 216 flow [2023-08-31 23:54:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 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) [2023-08-31 23:54:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:53,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 23:54:53,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 23:54:53,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:53,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1160281707, now seen corresponding path program 1 times [2023-08-31 23:54:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451256205] [2023-08-31 23:54:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:53,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:53,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451256205] [2023-08-31 23:54:53,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451256205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:53,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:53,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:53,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537873488] [2023-08-31 23:54:53,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:53,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 23:54:53,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:53,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 23:54:53,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 23:54:53,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 593 [2023-08-31 23:54:53,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 292.25) internal successors, (1169), 4 states have internal predecessors, (1169), 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) [2023-08-31 23:54:53,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:53,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 593 [2023-08-31 23:54:53,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:54,092 INFO L130 PetriNetUnfolder]: 1664/2712 cut-off events. [2023-08-31 23:54:54,093 INFO L131 PetriNetUnfolder]: For 473/612 co-relation queries the response was YES. [2023-08-31 23:54:54,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 2712 events. 1664/2712 cut-off events. For 473/612 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14428 event pairs, 830 based on Foata normal form. 153/1792 useless extension candidates. Maximal degree in co-relation 5861. Up to 2427 conditions per place. [2023-08-31 23:54:54,103 INFO L137 encePairwiseOnDemand]: 591/593 looper letters, 40 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-31 23:54:54,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 296 flow [2023-08-31 23:54:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-31 23:54:54,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092748735244519 [2023-08-31 23:54:54,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-31 23:54:54,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-31 23:54:54,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:54,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-31 23:54:54,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 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) [2023-08-31 23:54:54,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:54,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:54,109 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 216 flow. Second operand 3 states and 906 transitions. [2023-08-31 23:54:54,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 296 flow [2023-08-31 23:54:54,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:54,111 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 202 flow [2023-08-31 23:54:54,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2023-08-31 23:54:54,112 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-31 23:54:54,112 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 202 flow [2023-08-31 23:54:54,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 292.25) internal successors, (1169), 4 states have internal predecessors, (1169), 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) [2023-08-31 23:54:54,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:54,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 23:54:54,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 23:54:54,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread_usbErr7ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:54,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1607727219, now seen corresponding path program 1 times [2023-08-31 23:54:54,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:54,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540881973] [2023-08-31 23:54:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:54,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:54,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:54,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540881973] [2023-08-31 23:54:54,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540881973] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:54,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:54,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 23:54:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364995499] [2023-08-31 23:54:54,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:54,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 23:54:54,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 23:54:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 23:54:54,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 593 [2023-08-31 23:54:54,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 284.5) internal successors, (1138), 4 states have internal predecessors, (1138), 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) [2023-08-31 23:54:54,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:54,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 593 [2023-08-31 23:54:54,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:54,440 INFO L130 PetriNetUnfolder]: 2101/3410 cut-off events. [2023-08-31 23:54:54,440 INFO L131 PetriNetUnfolder]: For 489/687 co-relation queries the response was YES. [2023-08-31 23:54:54,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7375 conditions, 3410 events. 2101/3410 cut-off events. For 489/687 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18627 event pairs, 583 based on Foata normal form. 72/2277 useless extension candidates. Maximal degree in co-relation 7366. Up to 1533 conditions per place. [2023-08-31 23:54:54,450 INFO L137 encePairwiseOnDemand]: 584/593 looper letters, 79 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2023-08-31 23:54:54,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 105 transitions, 516 flow [2023-08-31 23:54:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 23:54:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 23:54:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1497 transitions. [2023-08-31 23:54:54,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048903878583474 [2023-08-31 23:54:54,453 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1497 transitions. [2023-08-31 23:54:54,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1497 transitions. [2023-08-31 23:54:54,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:54,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1497 transitions. [2023-08-31 23:54:54,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.4) internal successors, (1497), 5 states have internal predecessors, (1497), 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) [2023-08-31 23:54:54,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 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) [2023-08-31 23:54:54,459 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 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) [2023-08-31 23:54:54,459 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 202 flow. Second operand 5 states and 1497 transitions. [2023-08-31 23:54:54,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 105 transitions, 516 flow [2023-08-31 23:54:54,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 105 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 23:54:54,461 INFO L231 Difference]: Finished difference. Result has 59 places, 64 transitions, 285 flow [2023-08-31 23:54:54,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=59, PETRI_TRANSITIONS=64} [2023-08-31 23:54:54,462 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-08-31 23:54:54,462 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 64 transitions, 285 flow [2023-08-31 23:54:54,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.5) internal successors, (1138), 4 states have internal predecessors, (1138), 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) [2023-08-31 23:54:54,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:54,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:54,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 23:54:54,463 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:54,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1702027211, now seen corresponding path program 1 times [2023-08-31 23:54:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:54,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763900597] [2023-08-31 23:54:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:54,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:54,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763900597] [2023-08-31 23:54:54,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763900597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:54,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:54,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 23:54:54,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565691952] [2023-08-31 23:54:54,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:54,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:54,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:54,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:54,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:54,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 593 [2023-08-31 23:54:54,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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) [2023-08-31 23:54:54,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:54,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 593 [2023-08-31 23:54:54,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:54,750 INFO L130 PetriNetUnfolder]: 1947/3248 cut-off events. [2023-08-31 23:54:54,750 INFO L131 PetriNetUnfolder]: For 1882/2105 co-relation queries the response was YES. [2023-08-31 23:54:54,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8677 conditions, 3248 events. 1947/3248 cut-off events. For 1882/2105 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18324 event pairs, 684 based on Foata normal form. 101/2750 useless extension candidates. Maximal degree in co-relation 8665. Up to 2208 conditions per place. [2023-08-31 23:54:54,763 INFO L137 encePairwiseOnDemand]: 585/593 looper letters, 52 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2023-08-31 23:54:54,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 473 flow [2023-08-31 23:54:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2023-08-31 23:54:54,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4952220348510399 [2023-08-31 23:54:54,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2023-08-31 23:54:54,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2023-08-31 23:54:54,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:54,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2023-08-31 23:54:54,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 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) [2023-08-31 23:54:54,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:54,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:54,770 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 285 flow. Second operand 3 states and 881 transitions. [2023-08-31 23:54:54,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 473 flow [2023-08-31 23:54:54,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 23:54:54,775 INFO L231 Difference]: Finished difference. Result has 63 places, 69 transitions, 367 flow [2023-08-31 23:54:54,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=63, PETRI_TRANSITIONS=69} [2023-08-31 23:54:54,776 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-08-31 23:54:54,776 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 69 transitions, 367 flow [2023-08-31 23:54:54,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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) [2023-08-31 23:54:54,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:54,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:54,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 23:54:54,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread_ath9kErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:54,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:54,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1141608630, now seen corresponding path program 1 times [2023-08-31 23:54:54,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:54,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040354476] [2023-08-31 23:54:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:54,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:54,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:54,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040354476] [2023-08-31 23:54:54,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040354476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:54,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:54,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:54,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748196063] [2023-08-31 23:54:54,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:54,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:54,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:54,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:54,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 593 [2023-08-31 23:54:54,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 69 transitions, 367 flow. Second operand has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 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) [2023-08-31 23:54:54,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:54,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 593 [2023-08-31 23:54:54,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:55,119 INFO L130 PetriNetUnfolder]: 2187/3503 cut-off events. [2023-08-31 23:54:55,120 INFO L131 PetriNetUnfolder]: For 3344/3580 co-relation queries the response was YES. [2023-08-31 23:54:55,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10641 conditions, 3503 events. 2187/3503 cut-off events. For 3344/3580 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18472 event pairs, 475 based on Foata normal form. 245/3149 useless extension candidates. Maximal degree in co-relation 10627. Up to 1637 conditions per place. [2023-08-31 23:54:55,132 INFO L137 encePairwiseOnDemand]: 585/593 looper letters, 71 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2023-08-31 23:54:55,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 734 flow [2023-08-31 23:54:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 914 transitions. [2023-08-31 23:54:55,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137717818999438 [2023-08-31 23:54:55,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 914 transitions. [2023-08-31 23:54:55,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 914 transitions. [2023-08-31 23:54:55,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:55,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 914 transitions. [2023-08-31 23:54:55,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 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) [2023-08-31 23:54:55,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:55,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:55,150 INFO L175 Difference]: Start difference. First operand has 63 places, 69 transitions, 367 flow. Second operand 3 states and 914 transitions. [2023-08-31 23:54:55,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 734 flow [2023-08-31 23:54:55,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 102 transitions, 688 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:55,156 INFO L231 Difference]: Finished difference. Result has 65 places, 80 transitions, 525 flow [2023-08-31 23:54:55,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=525, PETRI_PLACES=65, PETRI_TRANSITIONS=80} [2023-08-31 23:54:55,157 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-08-31 23:54:55,157 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 80 transitions, 525 flow [2023-08-31 23:54:55,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 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) [2023-08-31 23:54:55,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:55,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:55,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 23:54:55,158 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:55,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:55,158 INFO L85 PathProgramCache]: Analyzing trace with hash 771035693, now seen corresponding path program 1 times [2023-08-31 23:54:55,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:55,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708016222] [2023-08-31 23:54:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:55,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:55,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:55,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708016222] [2023-08-31 23:54:55,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708016222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:55,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:55,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 23:54:55,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147849741] [2023-08-31 23:54:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:55,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:55,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:55,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 593 [2023-08-31 23:54:55,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 80 transitions, 525 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 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) [2023-08-31 23:54:55,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:55,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 593 [2023-08-31 23:54:55,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:55,376 INFO L130 PetriNetUnfolder]: 1171/1898 cut-off events. [2023-08-31 23:54:55,377 INFO L131 PetriNetUnfolder]: For 3303/3334 co-relation queries the response was YES. [2023-08-31 23:54:55,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6189 conditions, 1898 events. 1171/1898 cut-off events. For 3303/3334 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9145 event pairs, 266 based on Foata normal form. 154/1734 useless extension candidates. Maximal degree in co-relation 6174. Up to 1250 conditions per place. [2023-08-31 23:54:55,383 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 95 selfloop transitions, 3 changer transitions 0/114 dead transitions. [2023-08-31 23:54:55,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 114 transitions, 948 flow [2023-08-31 23:54:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 918 transitions. [2023-08-31 23:54:55,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160202360876898 [2023-08-31 23:54:55,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 918 transitions. [2023-08-31 23:54:55,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 918 transitions. [2023-08-31 23:54:55,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:55,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 918 transitions. [2023-08-31 23:54:55,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 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) [2023-08-31 23:54:55,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:55,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:55,390 INFO L175 Difference]: Start difference. First operand has 65 places, 80 transitions, 525 flow. Second operand 3 states and 918 transitions. [2023-08-31 23:54:55,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 114 transitions, 948 flow [2023-08-31 23:54:55,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 114 transitions, 902 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:55,396 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 437 flow [2023-08-31 23:54:55,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=437, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-31 23:54:55,397 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-08-31 23:54:55,397 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 437 flow [2023-08-31 23:54:55,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 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) [2023-08-31 23:54:55,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:55,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:55,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 23:54:55,398 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread_ath9kErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:55,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1869161011, now seen corresponding path program 1 times [2023-08-31 23:54:55,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:55,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373319054] [2023-08-31 23:54:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:55,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:55,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:55,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373319054] [2023-08-31 23:54:55,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373319054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:55,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:55,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 23:54:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524587035] [2023-08-31 23:54:55,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:55,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:55,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:55,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 593 [2023-08-31 23:54:55,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 437 flow. Second operand has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 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) [2023-08-31 23:54:55,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:55,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 593 [2023-08-31 23:54:55,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:55,672 INFO L130 PetriNetUnfolder]: 1680/2899 cut-off events. [2023-08-31 23:54:55,676 INFO L131 PetriNetUnfolder]: For 3826/3868 co-relation queries the response was YES. [2023-08-31 23:54:55,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9279 conditions, 2899 events. 1680/2899 cut-off events. For 3826/3868 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15923 event pairs, 465 based on Foata normal form. 62/2488 useless extension candidates. Maximal degree in co-relation 9264. Up to 1647 conditions per place. [2023-08-31 23:54:55,684 INFO L137 encePairwiseOnDemand]: 589/593 looper letters, 82 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-08-31 23:54:55,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 102 transitions, 761 flow [2023-08-31 23:54:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 923 transitions. [2023-08-31 23:54:55,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188308038223721 [2023-08-31 23:54:55,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 923 transitions. [2023-08-31 23:54:55,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 923 transitions. [2023-08-31 23:54:55,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:55,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 923 transitions. [2023-08-31 23:54:55,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 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) [2023-08-31 23:54:55,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:55,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:55,690 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 437 flow. Second operand 3 states and 923 transitions. [2023-08-31 23:54:55,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 102 transitions, 761 flow [2023-08-31 23:54:55,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 102 transitions, 749 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:55,695 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 471 flow [2023-08-31 23:54:55,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=471, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2023-08-31 23:54:55,696 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-08-31 23:54:55,696 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 471 flow [2023-08-31 23:54:55,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 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) [2023-08-31 23:54:55,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:55,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:55,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 23:54:55,697 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:55,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash -935124748, now seen corresponding path program 1 times [2023-08-31 23:54:55,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:55,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605938851] [2023-08-31 23:54:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:55,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:55,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:55,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605938851] [2023-08-31 23:54:55,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605938851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:55,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:55,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:55,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117465977] [2023-08-31 23:54:55,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:55,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:55,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:55,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:55,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 593 [2023-08-31 23:54:55,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 471 flow. Second operand has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 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) [2023-08-31 23:54:55,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:55,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 593 [2023-08-31 23:54:55,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:56,117 INFO L130 PetriNetUnfolder]: 1934/3573 cut-off events. [2023-08-31 23:54:56,117 INFO L131 PetriNetUnfolder]: For 4742/4786 co-relation queries the response was YES. [2023-08-31 23:54:56,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11148 conditions, 3573 events. 1934/3573 cut-off events. For 4742/4786 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 22852 event pairs, 569 based on Foata normal form. 54/3100 useless extension candidates. Maximal degree in co-relation 11132. Up to 1929 conditions per place. [2023-08-31 23:54:56,132 INFO L137 encePairwiseOnDemand]: 588/593 looper letters, 97 selfloop transitions, 13 changer transitions 0/125 dead transitions. [2023-08-31 23:54:56,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 125 transitions, 1047 flow [2023-08-31 23:54:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 915 transitions. [2023-08-31 23:54:56,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5143338954468802 [2023-08-31 23:54:56,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 915 transitions. [2023-08-31 23:54:56,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 915 transitions. [2023-08-31 23:54:56,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:56,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 915 transitions. [2023-08-31 23:54:56,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 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) [2023-08-31 23:54:56,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:56,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:56,139 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 471 flow. Second operand 3 states and 915 transitions. [2023-08-31 23:54:56,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 125 transitions, 1047 flow [2023-08-31 23:54:56,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 125 transitions, 1031 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:56,148 INFO L231 Difference]: Finished difference. Result has 69 places, 84 transitions, 625 flow [2023-08-31 23:54:56,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=625, PETRI_PLACES=69, PETRI_TRANSITIONS=84} [2023-08-31 23:54:56,148 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-31 23:54:56,148 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 84 transitions, 625 flow [2023-08-31 23:54:56,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 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) [2023-08-31 23:54:56,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:56,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:56,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 23:54:56,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:56,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:56,150 INFO L85 PathProgramCache]: Analyzing trace with hash -935124747, now seen corresponding path program 1 times [2023-08-31 23:54:56,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:56,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822504909] [2023-08-31 23:54:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:56,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:56,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822504909] [2023-08-31 23:54:56,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822504909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:56,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:56,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:56,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294122834] [2023-08-31 23:54:56,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:56,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:56,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:56,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:56,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:56,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 593 [2023-08-31 23:54:56,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 84 transitions, 625 flow. Second operand has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 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) [2023-08-31 23:54:56,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:56,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 593 [2023-08-31 23:54:56,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:56,598 INFO L130 PetriNetUnfolder]: 1890/3419 cut-off events. [2023-08-31 23:54:56,599 INFO L131 PetriNetUnfolder]: For 5958/6026 co-relation queries the response was YES. [2023-08-31 23:54:56,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11344 conditions, 3419 events. 1890/3419 cut-off events. For 5958/6026 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 21142 event pairs, 557 based on Foata normal form. 102/3002 useless extension candidates. Maximal degree in co-relation 11327. Up to 1638 conditions per place. [2023-08-31 23:54:56,616 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 105 selfloop transitions, 5 changer transitions 0/125 dead transitions. [2023-08-31 23:54:56,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 1124 flow [2023-08-31 23:54:56,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 924 transitions. [2023-08-31 23:54:56,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193929173693086 [2023-08-31 23:54:56,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 924 transitions. [2023-08-31 23:54:56,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 924 transitions. [2023-08-31 23:54:56,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:56,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 924 transitions. [2023-08-31 23:54:56,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 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) [2023-08-31 23:54:56,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:56,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:56,624 INFO L175 Difference]: Start difference. First operand has 69 places, 84 transitions, 625 flow. Second operand 3 states and 924 transitions. [2023-08-31 23:54:56,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 1124 flow [2023-08-31 23:54:56,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 125 transitions, 1098 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:56,632 INFO L231 Difference]: Finished difference. Result has 68 places, 83 transitions, 607 flow [2023-08-31 23:54:56,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=607, PETRI_PLACES=68, PETRI_TRANSITIONS=83} [2023-08-31 23:54:56,633 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-08-31 23:54:56,633 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 83 transitions, 607 flow [2023-08-31 23:54:56,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 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) [2023-08-31 23:54:56,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:56,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:56,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 23:54:56,634 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread_ath9kErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:56,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:56,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2109379522, now seen corresponding path program 1 times [2023-08-31 23:54:56,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:56,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640179075] [2023-08-31 23:54:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:56,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:56,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:56,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640179075] [2023-08-31 23:54:56,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640179075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:56,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:56,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 23:54:56,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290084363] [2023-08-31 23:54:56,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:56,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:56,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:56,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:56,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:56,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 593 [2023-08-31 23:54:56,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 83 transitions, 607 flow. Second operand has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 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) [2023-08-31 23:54:56,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:56,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 593 [2023-08-31 23:54:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:56,805 INFO L130 PetriNetUnfolder]: 510/1016 cut-off events. [2023-08-31 23:54:56,805 INFO L131 PetriNetUnfolder]: For 2044/2048 co-relation queries the response was YES. [2023-08-31 23:54:56,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3194 conditions, 1016 events. 510/1016 cut-off events. For 2044/2048 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5055 event pairs, 113 based on Foata normal form. 203/1060 useless extension candidates. Maximal degree in co-relation 3177. Up to 448 conditions per place. [2023-08-31 23:54:56,809 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 45 selfloop transitions, 14 changer transitions 2/73 dead transitions. [2023-08-31 23:54:56,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 73 transitions, 633 flow [2023-08-31 23:54:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 880 transitions. [2023-08-31 23:54:56,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946599213041034 [2023-08-31 23:54:56,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 880 transitions. [2023-08-31 23:54:56,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 880 transitions. [2023-08-31 23:54:56,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:56,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 880 transitions. [2023-08-31 23:54:56,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.3333333333333) internal successors, (880), 3 states have internal predecessors, (880), 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) [2023-08-31 23:54:56,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:56,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:56,816 INFO L175 Difference]: Start difference. First operand has 68 places, 83 transitions, 607 flow. Second operand 3 states and 880 transitions. [2023-08-31 23:54:56,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 73 transitions, 633 flow [2023-08-31 23:54:56,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 556 flow, removed 19 selfloop flow, removed 7 redundant places. [2023-08-31 23:54:56,820 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 428 flow [2023-08-31 23:54:56,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2023-08-31 23:54:56,821 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-31 23:54:56,821 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 428 flow [2023-08-31 23:54:56,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 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) [2023-08-31 23:54:56,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:56,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:56,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 23:54:56,821 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:56,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1075926219, now seen corresponding path program 1 times [2023-08-31 23:54:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:56,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504410403] [2023-08-31 23:54:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:56,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:56,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:56,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504410403] [2023-08-31 23:54:56,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504410403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:56,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:56,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:56,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411815791] [2023-08-31 23:54:56,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:56,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:56,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:56,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:56,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:56,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 593 [2023-08-31 23:54:56,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 428 flow. Second operand has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 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) [2023-08-31 23:54:56,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:56,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 593 [2023-08-31 23:54:56,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:56,992 INFO L130 PetriNetUnfolder]: 510/974 cut-off events. [2023-08-31 23:54:56,992 INFO L131 PetriNetUnfolder]: For 1099/1099 co-relation queries the response was YES. [2023-08-31 23:54:56,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2733 conditions, 974 events. 510/974 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4537 event pairs, 243 based on Foata normal form. 5/839 useless extension candidates. Maximal degree in co-relation 2718. Up to 805 conditions per place. [2023-08-31 23:54:56,996 INFO L137 encePairwiseOnDemand]: 591/593 looper letters, 47 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-31 23:54:56,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 524 flow [2023-08-31 23:54:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 883 transitions. [2023-08-31 23:54:56,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4963462619449129 [2023-08-31 23:54:56,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 883 transitions. [2023-08-31 23:54:56,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 883 transitions. [2023-08-31 23:54:56,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:56,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 883 transitions. [2023-08-31 23:54:56,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.3333333333333) internal successors, (883), 3 states have internal predecessors, (883), 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) [2023-08-31 23:54:57,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:57,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:57,001 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 428 flow. Second operand 3 states and 883 transitions. [2023-08-31 23:54:57,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 524 flow [2023-08-31 23:54:57,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 61 transitions, 491 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 23:54:57,004 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 397 flow [2023-08-31 23:54:57,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=397, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-08-31 23:54:57,005 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-31 23:54:57,005 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 397 flow [2023-08-31 23:54:57,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 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) [2023-08-31 23:54:57,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:57,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:57,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 23:54:57,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:57,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:57,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1006023782, now seen corresponding path program 1 times [2023-08-31 23:54:57,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:57,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296396873] [2023-08-31 23:54:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:57,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296396873] [2023-08-31 23:54:57,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296396873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:57,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:57,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:57,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164666637] [2023-08-31 23:54:57,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:57,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 23:54:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 23:54:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 23:54:57,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 593 [2023-08-31 23:54:57,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 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) [2023-08-31 23:54:57,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:57,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 593 [2023-08-31 23:54:57,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:57,291 INFO L130 PetriNetUnfolder]: 509/992 cut-off events. [2023-08-31 23:54:57,292 INFO L131 PetriNetUnfolder]: For 874/874 co-relation queries the response was YES. [2023-08-31 23:54:57,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2680 conditions, 992 events. 509/992 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4664 event pairs, 147 based on Foata normal form. 1/860 useless extension candidates. Maximal degree in co-relation 2666. Up to 600 conditions per place. [2023-08-31 23:54:57,297 INFO L137 encePairwiseOnDemand]: 588/593 looper letters, 64 selfloop transitions, 4 changer transitions 14/92 dead transitions. [2023-08-31 23:54:57,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 92 transitions, 679 flow [2023-08-31 23:54:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 23:54:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 23:54:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1191 transitions. [2023-08-31 23:54:57,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021079258010118 [2023-08-31 23:54:57,300 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1191 transitions. [2023-08-31 23:54:57,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1191 transitions. [2023-08-31 23:54:57,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:57,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1191 transitions. [2023-08-31 23:54:57,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 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) [2023-08-31 23:54:57,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 593.0) internal successors, (2965), 5 states have internal predecessors, (2965), 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) [2023-08-31 23:54:57,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 593.0) internal successors, (2965), 5 states have internal predecessors, (2965), 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) [2023-08-31 23:54:57,305 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 397 flow. Second operand 4 states and 1191 transitions. [2023-08-31 23:54:57,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 92 transitions, 679 flow [2023-08-31 23:54:57,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 23:54:57,309 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 384 flow [2023-08-31 23:54:57,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2023-08-31 23:54:57,310 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-31 23:54:57,310 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 384 flow [2023-08-31 23:54:57,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 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) [2023-08-31 23:54:57,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:57,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:57,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 23:54:57,310 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:57,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:57,311 INFO L85 PathProgramCache]: Analyzing trace with hash 680078899, now seen corresponding path program 1 times [2023-08-31 23:54:57,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:57,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777564492] [2023-08-31 23:54:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:57,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 23:54:57,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:57,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777564492] [2023-08-31 23:54:57,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777564492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:57,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:57,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898787759] [2023-08-31 23:54:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:57,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:57,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:57,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 593 [2023-08-31 23:54:57,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 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) [2023-08-31 23:54:57,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:57,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 593 [2023-08-31 23:54:57,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:57,530 INFO L130 PetriNetUnfolder]: 493/937 cut-off events. [2023-08-31 23:54:57,530 INFO L131 PetriNetUnfolder]: For 1068/1072 co-relation queries the response was YES. [2023-08-31 23:54:57,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 937 events. 493/937 cut-off events. For 1068/1072 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4406 event pairs, 166 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 2647. Up to 560 conditions per place. [2023-08-31 23:54:57,534 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 38 selfloop transitions, 15 changer transitions 0/63 dead transitions. [2023-08-31 23:54:57,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 510 flow [2023-08-31 23:54:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-08-31 23:54:57,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508150646430579 [2023-08-31 23:54:57,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-08-31 23:54:57,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-08-31 23:54:57,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:57,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-08-31 23:54:57,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 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) [2023-08-31 23:54:57,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:57,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:57,540 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 384 flow. Second operand 3 states and 904 transitions. [2023-08-31 23:54:57,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 510 flow [2023-08-31 23:54:57,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 487 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-31 23:54:57,545 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 389 flow [2023-08-31 23:54:57,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-31 23:54:57,545 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-31 23:54:57,545 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 389 flow [2023-08-31 23:54:57,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 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) [2023-08-31 23:54:57,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:57,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:57,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 23:54:57,546 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:57,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash 680078898, now seen corresponding path program 1 times [2023-08-31 23:54:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:57,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916552887] [2023-08-31 23:54:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:57,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 23:54:57,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:57,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916552887] [2023-08-31 23:54:57,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916552887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:57,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:57,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:57,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310691894] [2023-08-31 23:54:57,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:57,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 23:54:57,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:57,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 23:54:57,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 23:54:57,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 593 [2023-08-31 23:54:57,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 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) [2023-08-31 23:54:57,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:57,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 593 [2023-08-31 23:54:57,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:57,726 INFO L130 PetriNetUnfolder]: 493/923 cut-off events. [2023-08-31 23:54:57,726 INFO L131 PetriNetUnfolder]: For 1172/1176 co-relation queries the response was YES. [2023-08-31 23:54:57,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2653 conditions, 923 events. 493/923 cut-off events. For 1172/1176 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4260 event pairs, 166 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 2640. Up to 560 conditions per place. [2023-08-31 23:54:57,729 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 38 selfloop transitions, 15 changer transitions 0/62 dead transitions. [2023-08-31 23:54:57,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 515 flow [2023-08-31 23:54:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 23:54:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 23:54:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2023-08-31 23:54:57,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014052838673412 [2023-08-31 23:54:57,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2023-08-31 23:54:57,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2023-08-31 23:54:57,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:57,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2023-08-31 23:54:57,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 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) [2023-08-31 23:54:57,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:57,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-31 23:54:57,736 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 389 flow. Second operand 3 states and 892 transitions. [2023-08-31 23:54:57,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 515 flow [2023-08-31 23:54:57,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 485 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:57,739 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 387 flow [2023-08-31 23:54:57,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=387, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2023-08-31 23:54:57,739 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-31 23:54:57,739 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 387 flow [2023-08-31 23:54:57,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 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) [2023-08-31 23:54:57,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:57,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 23:54:57,740 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:57,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash 721198261, now seen corresponding path program 1 times [2023-08-31 23:54:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:57,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400678964] [2023-08-31 23:54:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:57,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 23:54:57,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:57,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400678964] [2023-08-31 23:54:57,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400678964] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:57,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:57,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 23:54:57,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514314794] [2023-08-31 23:54:57,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:57,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 23:54:57,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 23:54:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 23:54:57,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 593 [2023-08-31 23:54:57,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 280.8) internal successors, (1404), 5 states have internal predecessors, (1404), 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) [2023-08-31 23:54:57,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:57,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 593 [2023-08-31 23:54:57,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:58,027 INFO L130 PetriNetUnfolder]: 597/1009 cut-off events. [2023-08-31 23:54:58,027 INFO L131 PetriNetUnfolder]: For 1191/1191 co-relation queries the response was YES. [2023-08-31 23:54:58,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 1009 events. 597/1009 cut-off events. For 1191/1191 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4280 event pairs, 171 based on Foata normal form. 40/882 useless extension candidates. Maximal degree in co-relation 2896. Up to 548 conditions per place. [2023-08-31 23:54:58,031 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 35 selfloop transitions, 18 changer transitions 0/60 dead transitions. [2023-08-31 23:54:58,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 505 flow [2023-08-31 23:54:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 23:54:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 23:54:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1147 transitions. [2023-08-31 23:54:58,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48355817875210794 [2023-08-31 23:54:58,034 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1147 transitions. [2023-08-31 23:54:58,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1147 transitions. [2023-08-31 23:54:58,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:58,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1147 transitions. [2023-08-31 23:54:58,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.75) internal successors, (1147), 4 states have internal predecessors, (1147), 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) [2023-08-31 23:54:58,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 593.0) internal successors, (2965), 5 states have internal predecessors, (2965), 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) [2023-08-31 23:54:58,038 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 593.0) internal successors, (2965), 5 states have internal predecessors, (2965), 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) [2023-08-31 23:54:58,039 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 387 flow. Second operand 4 states and 1147 transitions. [2023-08-31 23:54:58,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 505 flow [2023-08-31 23:54:58,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 467 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 23:54:58,042 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 375 flow [2023-08-31 23:54:58,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=375, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-08-31 23:54:58,042 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-31 23:54:58,042 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 375 flow [2023-08-31 23:54:58,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.8) internal successors, (1404), 5 states have internal predecessors, (1404), 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) [2023-08-31 23:54:58,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:58,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:58,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 23:54:58,043 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:58,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:58,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1494369824, now seen corresponding path program 1 times [2023-08-31 23:54:58,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:58,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035643881] [2023-08-31 23:54:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 23:54:58,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035643881] [2023-08-31 23:54:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035643881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:58,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:58,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 23:54:58,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122706965] [2023-08-31 23:54:58,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:58,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 23:54:58,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 23:54:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 23:54:58,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 593 [2023-08-31 23:54:58,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 375 flow. Second operand has 4 states, 4 states have (on average 285.75) internal successors, (1143), 4 states have internal predecessors, (1143), 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) [2023-08-31 23:54:58,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:58,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 593 [2023-08-31 23:54:58,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:58,345 INFO L130 PetriNetUnfolder]: 721/1191 cut-off events. [2023-08-31 23:54:58,345 INFO L131 PetriNetUnfolder]: For 1249/1249 co-relation queries the response was YES. [2023-08-31 23:54:58,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3418 conditions, 1191 events. 721/1191 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5086 event pairs, 266 based on Foata normal form. 0/1035 useless extension candidates. Maximal degree in co-relation 3405. Up to 783 conditions per place. [2023-08-31 23:54:58,349 INFO L137 encePairwiseOnDemand]: 588/593 looper letters, 37 selfloop transitions, 18 changer transitions 1/61 dead transitions. [2023-08-31 23:54:58,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 513 flow [2023-08-31 23:54:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 23:54:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 23:54:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1164 transitions. [2023-08-31 23:54:58,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49072512647554806 [2023-08-31 23:54:58,352 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1164 transitions. [2023-08-31 23:54:58,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1164 transitions. [2023-08-31 23:54:58,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:58,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1164 transitions. [2023-08-31 23:54:58,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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) [2023-08-31 23:54:58,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 593.0) internal successors, (2965), 5 states have internal predecessors, (2965), 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) [2023-08-31 23:54:58,357 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 593.0) internal successors, (2965), 5 states have internal predecessors, (2965), 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) [2023-08-31 23:54:58,357 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 375 flow. Second operand 4 states and 1164 transitions. [2023-08-31 23:54:58,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 513 flow [2023-08-31 23:54:58,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 477 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 23:54:58,360 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 365 flow [2023-08-31 23:54:58,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=365, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-31 23:54:58,361 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-31 23:54:58,361 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 365 flow [2023-08-31 23:54:58,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 285.75) internal successors, (1143), 4 states have internal predecessors, (1143), 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) [2023-08-31 23:54:58,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:58,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:58,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 23:54:58,362 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:58,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash -818432315, now seen corresponding path program 1 times [2023-08-31 23:54:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:58,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431993798] [2023-08-31 23:54:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:58,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 23:54:58,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:58,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431993798] [2023-08-31 23:54:58,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431993798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:58,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:58,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 23:54:58,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880967715] [2023-08-31 23:54:58,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:58,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 23:54:58,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:58,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 23:54:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 23:54:58,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 593 [2023-08-31 23:54:58,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 286.5) internal successors, (1146), 4 states have internal predecessors, (1146), 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) [2023-08-31 23:54:58,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:58,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 593 [2023-08-31 23:54:58,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:58,750 INFO L130 PetriNetUnfolder]: 591/1106 cut-off events. [2023-08-31 23:54:58,751 INFO L131 PetriNetUnfolder]: For 1372/1372 co-relation queries the response was YES. [2023-08-31 23:54:58,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3164 conditions, 1106 events. 591/1106 cut-off events. For 1372/1372 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5433 event pairs, 165 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 3151. Up to 537 conditions per place. [2023-08-31 23:54:58,754 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 62 selfloop transitions, 23 changer transitions 0/91 dead transitions. [2023-08-31 23:54:58,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 797 flow [2023-08-31 23:54:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 23:54:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 23:54:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1185 transitions. [2023-08-31 23:54:58,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49957841483979765 [2023-08-31 23:54:58,757 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1185 transitions. [2023-08-31 23:54:58,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1185 transitions. [2023-08-31 23:54:58,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:58,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1185 transitions. [2023-08-31 23:54:58,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.25) internal successors, (1185), 4 states have internal predecessors, (1185), 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) [2023-08-31 23:54:58,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 593.0) internal successors, (2965), 5 states have internal predecessors, (2965), 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) [2023-08-31 23:54:58,762 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 593.0) internal successors, (2965), 5 states have internal predecessors, (2965), 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) [2023-08-31 23:54:58,762 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 365 flow. Second operand 4 states and 1185 transitions. [2023-08-31 23:54:58,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 797 flow [2023-08-31 23:54:58,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 739 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 23:54:58,765 INFO L231 Difference]: Finished difference. Result has 55 places, 63 transitions, 583 flow [2023-08-31 23:54:58,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=583, PETRI_PLACES=55, PETRI_TRANSITIONS=63} [2023-08-31 23:54:58,765 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-31 23:54:58,766 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 63 transitions, 583 flow [2023-08-31 23:54:58,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 286.5) internal successors, (1146), 4 states have internal predecessors, (1146), 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) [2023-08-31 23:54:58,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:58,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:58,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 23:54:58,766 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:58,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:58,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1685036345, now seen corresponding path program 2 times [2023-08-31 23:54:58,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:58,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520635711] [2023-08-31 23:54:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:58,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 23:54:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520635711] [2023-08-31 23:54:58,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520635711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 23:54:58,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 23:54:58,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 23:54:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598704565] [2023-08-31 23:54:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 23:54:58,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 23:54:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:54:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 23:54:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 23:54:58,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 593 [2023-08-31 23:54:58,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 63 transitions, 583 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 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) [2023-08-31 23:54:58,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:54:58,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 593 [2023-08-31 23:54:58,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:54:59,091 INFO L130 PetriNetUnfolder]: 591/1106 cut-off events. [2023-08-31 23:54:59,091 INFO L131 PetriNetUnfolder]: For 1902/1902 co-relation queries the response was YES. [2023-08-31 23:54:59,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3331 conditions, 1106 events. 591/1106 cut-off events. For 1902/1902 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5386 event pairs, 115 based on Foata normal form. 4/962 useless extension candidates. Maximal degree in co-relation 3316. Up to 408 conditions per place. [2023-08-31 23:54:59,095 INFO L137 encePairwiseOnDemand]: 588/593 looper letters, 56 selfloop transitions, 34 changer transitions 0/96 dead transitions. [2023-08-31 23:54:59,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 96 transitions, 902 flow [2023-08-31 23:54:59,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 23:54:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 23:54:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1461 transitions. [2023-08-31 23:54:59,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4927487352445194 [2023-08-31 23:54:59,098 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1461 transitions. [2023-08-31 23:54:59,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1461 transitions. [2023-08-31 23:54:59,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:54:59,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1461 transitions. [2023-08-31 23:54:59,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 292.2) internal successors, (1461), 5 states have internal predecessors, (1461), 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) [2023-08-31 23:54:59,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 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) [2023-08-31 23:54:59,105 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 593.0) internal successors, (3558), 6 states have internal predecessors, (3558), 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) [2023-08-31 23:54:59,105 INFO L175 Difference]: Start difference. First operand has 55 places, 63 transitions, 583 flow. Second operand 5 states and 1461 transitions. [2023-08-31 23:54:59,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 96 transitions, 902 flow [2023-08-31 23:54:59,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 96 transitions, 864 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-08-31 23:54:59,109 INFO L231 Difference]: Finished difference. Result has 58 places, 66 transitions, 655 flow [2023-08-31 23:54:59,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=655, PETRI_PLACES=58, PETRI_TRANSITIONS=66} [2023-08-31 23:54:59,109 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-31 23:54:59,109 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 66 transitions, 655 flow [2023-08-31 23:54:59,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 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) [2023-08-31 23:54:59,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:54:59,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:54:59,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 23:54:59,110 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:54:59,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:54:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1579723231, now seen corresponding path program 1 times [2023-08-31 23:54:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:54:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436725264] [2023-08-31 23:54:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:54:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:59,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:54:59,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436725264] [2023-08-31 23:54:59,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436725264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 23:54:59,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770225286] [2023-08-31 23:54:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:54:59,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 23:54:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 23:54:59,331 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) [2023-08-31 23:54:59,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 23:54:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:54:59,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 23:54:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 23:54:59,592 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-31 23:54:59,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 32 [2023-08-31 23:54:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:54:59,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 23:55:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 23:55:00,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770225286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 23:55:00,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 23:55:00,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2023-08-31 23:55:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139352590] [2023-08-31 23:55:00,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 23:55:00,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 23:55:00,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:55:00,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 23:55:00,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-31 23:55:00,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 593 [2023-08-31 23:55:00,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 66 transitions, 655 flow. Second operand has 11 states, 11 states have (on average 282.1818181818182) internal successors, (3104), 11 states have internal predecessors, (3104), 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) [2023-08-31 23:55:00,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:55:00,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 593 [2023-08-31 23:55:00,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:55:01,135 INFO L130 PetriNetUnfolder]: 676/1256 cut-off events. [2023-08-31 23:55:01,136 INFO L131 PetriNetUnfolder]: For 2603/2605 co-relation queries the response was YES. [2023-08-31 23:55:01,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1256 events. 676/1256 cut-off events. For 2603/2605 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5690 event pairs, 189 based on Foata normal form. 2/1082 useless extension candidates. Maximal degree in co-relation 3916. Up to 741 conditions per place. [2023-08-31 23:55:01,140 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 65 selfloop transitions, 2 changer transitions 46/118 dead transitions. [2023-08-31 23:55:01,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 118 transitions, 1137 flow [2023-08-31 23:55:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 23:55:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 23:55:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1744 transitions. [2023-08-31 23:55:01,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4901630129286116 [2023-08-31 23:55:01,144 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1744 transitions. [2023-08-31 23:55:01,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1744 transitions. [2023-08-31 23:55:01,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:55:01,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1744 transitions. [2023-08-31 23:55:01,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 290.6666666666667) internal successors, (1744), 6 states have internal predecessors, (1744), 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) [2023-08-31 23:55:01,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 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) [2023-08-31 23:55:01,150 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 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) [2023-08-31 23:55:01,150 INFO L175 Difference]: Start difference. First operand has 58 places, 66 transitions, 655 flow. Second operand 6 states and 1744 transitions. [2023-08-31 23:55:01,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 118 transitions, 1137 flow [2023-08-31 23:55:01,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 118 transitions, 1103 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-08-31 23:55:01,156 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 579 flow [2023-08-31 23:55:01,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=579, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-08-31 23:55:01,157 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-31 23:55:01,157 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 579 flow [2023-08-31 23:55:01,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 282.1818181818182) internal successors, (3104), 11 states have internal predecessors, (3104), 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) [2023-08-31 23:55:01,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 23:55:01,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:55:01,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 23:55:01,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-31 23:55:01,364 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-31 23:55:01,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 23:55:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash 559510005, now seen corresponding path program 2 times [2023-08-31 23:55:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 23:55:01,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478893461] [2023-08-31 23:55:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 23:55:01,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 23:55:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 23:55:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 23:55:01,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 23:55:01,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478893461] [2023-08-31 23:55:01,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478893461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 23:55:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14396145] [2023-08-31 23:55:01,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 23:55:01,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 23:55:01,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 23:55:01,597 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) [2023-08-31 23:55:01,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 23:55:01,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 23:55:01,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 23:55:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 23:55:01,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 23:55:01,761 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-31 23:55:01,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 32 [2023-08-31 23:55:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 23:55:01,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 23:55:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 23:55:02,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14396145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 23:55:02,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 23:55:02,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 23:55:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417326484] [2023-08-31 23:55:02,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 23:55:02,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 23:55:02,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 23:55:02,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 23:55:02,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-31 23:55:03,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 593 [2023-08-31 23:55:03,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 579 flow. Second operand has 12 states, 12 states have (on average 274.8333333333333) internal successors, (3298), 12 states have internal predecessors, (3298), 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) [2023-08-31 23:55:03,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 23:55:03,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 593 [2023-08-31 23:55:03,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 23:55:03,584 INFO L130 PetriNetUnfolder]: 524/962 cut-off events. [2023-08-31 23:55:03,585 INFO L131 PetriNetUnfolder]: For 1752/1752 co-relation queries the response was YES. [2023-08-31 23:55:03,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2953 conditions, 962 events. 524/962 cut-off events. For 1752/1752 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4024 event pairs, 115 based on Foata normal form. 2/832 useless extension candidates. Maximal degree in co-relation 2933. Up to 260 conditions per place. [2023-08-31 23:55:03,587 INFO L137 encePairwiseOnDemand]: 587/593 looper letters, 0 selfloop transitions, 0 changer transitions 106/106 dead transitions. [2023-08-31 23:55:03,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 952 flow [2023-08-31 23:55:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 23:55:03,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 23:55:03,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1969 transitions. [2023-08-31 23:55:03,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743435316791135 [2023-08-31 23:55:03,591 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1969 transitions. [2023-08-31 23:55:03,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1969 transitions. [2023-08-31 23:55:03,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 23:55:03,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1969 transitions. [2023-08-31 23:55:03,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 281.2857142857143) internal successors, (1969), 7 states have internal predecessors, (1969), 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) [2023-08-31 23:55:03,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 593.0) internal successors, (4744), 8 states have internal predecessors, (4744), 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) [2023-08-31 23:55:03,598 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 593.0) internal successors, (4744), 8 states have internal predecessors, (4744), 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) [2023-08-31 23:55:03,598 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 579 flow. Second operand 7 states and 1969 transitions. [2023-08-31 23:55:03,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 952 flow [2023-08-31 23:55:03,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 106 transitions, 916 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-08-31 23:55:03,603 INFO L231 Difference]: Finished difference. Result has 61 places, 0 transitions, 0 flow [2023-08-31 23:55:03,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=61, PETRI_TRANSITIONS=0} [2023-08-31 23:55:03,603 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-31 23:55:03,603 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 0 transitions, 0 flow [2023-08-31 23:55:03,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 274.8333333333333) internal successors, (3298), 12 states have internal predecessors, (3298), 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) [2023-08-31 23:55:03,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 28 remaining) [2023-08-31 23:55:03,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 28 remaining) [2023-08-31 23:55:03,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (25 of 28 remaining) [2023-08-31 23:55:03,604 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 28 remaining) [2023-08-31 23:55:03,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 28 remaining) [2023-08-31 23:55:03,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr6ASSERT_VIOLATIONMEMORY_LEAK (22 of 28 remaining) [2023-08-31 23:55:03,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr7ASSERT_VIOLATIONMEMORY_LEAK (21 of 28 remaining) [2023-08-31 23:55:03,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_ath9kErr0ASSERT_VIOLATIONMEMORY_LEAK (20 of 28 remaining) [2023-08-31 23:55:03,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 28 remaining) [2023-08-31 23:55:03,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 28 remaining) [2023-08-31 23:55:03,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 28 remaining) [2023-08-31 23:55:03,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr6ASSERT_VIOLATIONMEMORY_LEAK (16 of 28 remaining) [2023-08-31 23:55:03,606 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 28 remaining) [2023-08-31 23:55:03,606 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 28 remaining) [2023-08-31 23:55:03,606 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 28 remaining) [2023-08-31 23:55:03,606 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 28 remaining) [2023-08-31 23:55:03,606 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 28 remaining) [2023-08-31 23:55:03,606 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (10 of 28 remaining) [2023-08-31 23:55:03,606 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 28 remaining) [2023-08-31 23:55:03,606 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 28 remaining) [2023-08-31 23:55:03,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (7 of 28 remaining) [2023-08-31 23:55:03,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 28 remaining) [2023-08-31 23:55:03,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_ath9kErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 28 remaining) [2023-08-31 23:55:03,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 28 remaining) [2023-08-31 23:55:03,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 28 remaining) [2023-08-31 23:55:03,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 28 remaining) [2023-08-31 23:55:03,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr7ASSERT_VIOLATIONMEMORY_LEAK (1 of 28 remaining) [2023-08-31 23:55:03,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 28 remaining) [2023-08-31 23:55:03,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 23:55:03,824 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,SelfDestructingSolverStorable25 [2023-08-31 23:55:03,824 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 23:55:03,825 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 (2/2) [2023-08-31 23:55:03,827 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 23:55:03,827 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 23:55:03,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 11:55:03 BasicIcfg [2023-08-31 23:55:03,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 23:55:03,830 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 23:55:03,830 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 23:55:03,830 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 23:55:03,830 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:54:40" (3/4) ... [2023-08-31 23:55:03,832 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-31 23:55:03,836 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread_ath9k [2023-08-31 23:55:03,836 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread_usb [2023-08-31 23:55:03,839 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2023-08-31 23:55:03,839 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-08-31 23:55:03,839 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-31 23:55:03,839 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-31 23:55:03,868 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-31 23:55:03,868 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 23:55:03,868 INFO L158 Benchmark]: Toolchain (without parser) took 24400.55ms. Allocated memory was 88.1MB in the beginning and 996.1MB in the end (delta: 908.1MB). Free memory was 62.5MB in the beginning and 377.7MB in the end (delta: -315.2MB). Peak memory consumption was 598.0MB. Max. memory is 16.1GB. [2023-08-31 23:55:03,868 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 67.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 23:55:03,869 INFO L158 Benchmark]: CACSL2BoogieTranslator took 649.31ms. Allocated memory is still 88.1MB. Free memory was 62.3MB in the beginning and 50.1MB in the end (delta: 12.2MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. [2023-08-31 23:55:03,869 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.15ms. Allocated memory is still 88.1MB. Free memory was 50.1MB in the beginning and 46.8MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 23:55:03,869 INFO L158 Benchmark]: Boogie Preprocessor took 50.73ms. Allocated memory is still 88.1MB. Free memory was 46.8MB in the beginning and 43.8MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-31 23:55:03,869 INFO L158 Benchmark]: RCFGBuilder took 570.94ms. Allocated memory is still 88.1MB. Free memory was 43.8MB in the beginning and 40.5MB in the end (delta: 3.3MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2023-08-31 23:55:03,869 INFO L158 Benchmark]: TraceAbstraction took 23020.51ms. Allocated memory was 88.1MB in the beginning and 996.1MB in the end (delta: 908.1MB). Free memory was 40.1MB in the beginning and 380.9MB in the end (delta: -340.8MB). Peak memory consumption was 565.6MB. Max. memory is 16.1GB. [2023-08-31 23:55:03,870 INFO L158 Benchmark]: Witness Printer took 38.16ms. Allocated memory is still 996.1MB. Free memory was 380.9MB in the beginning and 377.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-31 23:55:03,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 67.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 649.31ms. Allocated memory is still 88.1MB. Free memory was 62.3MB in the beginning and 50.1MB in the end (delta: 12.2MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.15ms. Allocated memory is still 88.1MB. Free memory was 50.1MB in the beginning and 46.8MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.73ms. Allocated memory is still 88.1MB. Free memory was 46.8MB in the beginning and 43.8MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 570.94ms. Allocated memory is still 88.1MB. Free memory was 43.8MB in the beginning and 40.5MB in the end (delta: 3.3MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. * TraceAbstraction took 23020.51ms. Allocated memory was 88.1MB in the beginning and 996.1MB in the end (delta: 908.1MB). Free memory was 40.1MB in the beginning and 380.9MB in the end (delta: -340.8MB). Peak memory consumption was 565.6MB. Max. memory is 16.1GB. * Witness Printer took 38.16ms. Allocated memory is still 996.1MB. Free memory was 380.9MB in the beginning and 377.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.1s, 194 PlacesBefore, 43 PlacesAfterwards, 209 TransitionsBefore, 45 TransitionsAfterwards, 10620 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 141 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 39 ConcurrentYvCompositions, 13 ChoiceCompositions, 240 TotalNumberOfCompositions, 16739 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12279, independent: 12053, independent conditional: 0, independent unconditional: 12053, dependent: 226, dependent conditional: 0, dependent unconditional: 226, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6188, independent: 6114, independent conditional: 0, independent unconditional: 6114, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12279, independent: 5939, independent conditional: 0, independent unconditional: 5939, dependent: 152, dependent conditional: 0, dependent unconditional: 152, unknown: 6188, unknown conditional: 0, unknown unconditional: 6188] , Statistics on independence cache: Total cache size (in pairs): 250, Positive cache size: 232, Positive conditional cache size: 0, Positive unconditional cache size: 232, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.3s, 210 PlacesBefore, 51 PlacesAfterwards, 227 TransitionsBefore, 54 TransitionsAfterwards, 10740 CoEnabledTransitionPairs, 6 FixpointIterations, 71 TrivialSequentialCompositions, 138 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 43 ConcurrentYvCompositions, 14 ChoiceCompositions, 269 TotalNumberOfCompositions, 16699 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12606, independent: 12381, independent conditional: 0, independent unconditional: 12381, dependent: 225, dependent conditional: 0, dependent unconditional: 225, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6233, independent: 6164, independent conditional: 0, independent unconditional: 6164, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12606, independent: 6217, independent conditional: 0, independent unconditional: 6217, dependent: 156, dependent conditional: 0, dependent unconditional: 156, unknown: 6233, unknown conditional: 0, unknown unconditional: 6233] , Statistics on independence cache: Total cache size (in pairs): 289, Positive cache size: 267, Positive conditional cache size: 0, Positive unconditional cache size: 267, Negative cache size: 22, Negative conditional cache size: 0, Negative unconditional cache size: 22, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1693]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1693]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 1693]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 1693]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1795]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 1693]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1693]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 319 locations, 31 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.7s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 86 IncrementalHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 0 mSDtfsCounter, 86 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 319 locations, 31 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.2s, OverallIterations: 25, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 2814 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1694 mSDsluCounter, 180 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 91 mSDsCounter, 203 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5468 IncrementalHoareTripleChecker+Invalid, 5679 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 203 mSolverCounterUnsat, 89 mSDtfsCounter, 5468 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=655occurred in iteration=23, InterpolantAutomatonStates: 89, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 340 ConstructedInterpolants, 39 QuantifiedInterpolants, 3633 SizeOfPredicates, 0 NumberOfNonLiveVariables, 614 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 29 InterpolantComputations, 23 PerfectInterpolantSequences, 19/32 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-31 23:55:03,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE