./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 AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:01:05,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:01:05,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:01:05,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:01:05,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:01:05,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:01:05,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:01:05,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:01:05,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:01:05,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:01:05,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:01:05,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:01:05,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:01:05,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:01:05,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:01:05,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:01:05,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:01:05,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:01:05,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:01:05,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:01:05,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:01:05,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:01:05,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:01:05,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:01:05,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:01:05,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:01:05,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:01:05,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:01:05,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:01:05,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:01:05,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:01:05,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:01:05,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:01:05,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:01:05,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:01:05,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:01:05,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:01:05,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:01:05,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:01:05,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:01:05,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:01:05,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:01:05,681 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:01:05,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:01:05,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:01:05,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:01:05,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:01:05,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:01:05,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:01:05,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:01:05,684 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:01:05,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:01:05,685 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:01:05,686 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:01:05,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:01:05,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:01:05,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:01:05,686 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:01:05,687 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:01:05,687 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:01:05,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:01:05,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:01:05,687 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:01:05,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:01:05,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:01:05,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:01:05,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:01:05,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:01:05,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:01:05,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:01:05,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:01:05,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:01:05,689 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:01:05,690 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:01:05,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:01:05,690 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:01:05,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9552a698db9701543deeff63aa990ab8fc4764b65dba5035623425bdf77554d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:01:06,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:01:06,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:01:06,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:01:06,033 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:01:06,036 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:01:06,038 INFO L432 ainManager$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 [2023-08-29 21:01:07,277 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:01:07,589 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:01:07,591 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i [2023-08-29 21:01:07,609 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8291434/653fbfada6d6427cacd95bef4f73c72d/FLAGa4bc4e8bf [2023-08-29 21:01:07,620 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8291434/653fbfada6d6427cacd95bef4f73c72d [2023-08-29 21:01:07,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:01:07,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:01:07,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:01:07,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:01:07,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:01:07,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:01:07" (1/1) ... [2023-08-29 21:01:07,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@130534bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:07, skipping insertion in model container [2023-08-29 21:01:07,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:01:07" (1/1) ... [2023-08-29 21:01:07,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:01:07,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:01:08,229 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] [2023-08-29 21:01:08,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:01:08,297 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:01:08,344 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] [2023-08-29 21:01:08,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:01:08,482 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:01:08,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08 WrapperNode [2023-08-29 21:01:08,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:01:08,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:01:08,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:01:08,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:01:08,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,572 INFO L138 Inliner]: procedures = 486, calls = 43, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 205 [2023-08-29 21:01:08,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:01:08,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:01:08,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:01:08,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:01:08,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,632 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:01:08,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:01:08,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:01:08,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:01:08,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (1/1) ... [2023-08-29 21:01:08,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:01:08,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:01:08,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:01:08,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:01:08,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread_usb [2023-08-29 21:01:08,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_usb [2023-08-29 21:01:08,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:01:08,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:01:08,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread_ath9k [2023-08-29 21:01:08,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_ath9k [2023-08-29 21:01:08,737 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:01:08,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:01:08,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-29 21:01:08,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:01:08,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:01:08,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:01:08,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:01:08,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:01:08,739 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:01:09,031 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:01:09,033 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:01:09,247 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:01:09,270 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:01:09,270 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 21:01:09,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:01:09 BoogieIcfgContainer [2023-08-29 21:01:09,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:01:09,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:01:09,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:01:09,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:01:09,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:01:07" (1/3) ... [2023-08-29 21:01:09,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbe8119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:01:09, skipping insertion in model container [2023-08-29 21:01:09,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:01:08" (2/3) ... [2023-08-29 21:01:09,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbe8119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:01:09, skipping insertion in model container [2023-08-29 21:01:09,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:01:09" (3/3) ... [2023-08-29 21:01:09,279 INFO L112 eAbstractionObserver]: Analyzing ICFG race-4_1-thread_local_vars.i [2023-08-29 21:01:09,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:01:09,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-08-29 21:01:09,295 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:01:09,389 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-29 21:01:09,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 324 transitions, 678 flow [2023-08-29 21:01:09,574 INFO L130 PetriNetUnfolder]: 33/339 cut-off events. [2023-08-29 21:01:09,574 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:01:09,582 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. [2023-08-29 21:01:09,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 324 transitions, 678 flow [2023-08-29 21:01:09,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 227 transitions, 471 flow [2023-08-29 21:01:09,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:01:09,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 227 transitions, 471 flow [2023-08-29 21:01:09,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 227 transitions, 471 flow [2023-08-29 21:01:09,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 227 transitions, 471 flow [2023-08-29 21:01:09,684 INFO L130 PetriNetUnfolder]: 33/339 cut-off events. [2023-08-29 21:01:09,684 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:01:09,689 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. [2023-08-29 21:01:09,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 10740 [2023-08-29 21:01:16,611 INFO L134 LiptonReduction]: Checked pairs total: 17413 [2023-08-29 21:01:16,611 INFO L136 LiptonReduction]: Total number of compositions: 273 [2023-08-29 21:01:16,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:01:16,636 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;@30e5b0f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:01:16,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-08-29 21:01:16,639 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 21:01:16,640 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:01:16,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:16,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 21:01:16,641 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)] === [2023-08-29 21:01:16,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:16,646 INFO L85 PathProgramCache]: Analyzing trace with hash 991, now seen corresponding path program 1 times [2023-08-29 21:01:16,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:16,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620351475] [2023-08-29 21:01:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:16,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:16,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:16,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620351475] [2023-08-29 21:01:16,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620351475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:16,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:16,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 21:01:16,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772283363] [2023-08-29 21:01:16,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:16,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 21:01:16,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 21:01:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 21:01:16,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 597 [2023-08-29 21:01:16,884 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) [2023-08-29 21:01:16,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:16,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 597 [2023-08-29 21:01:16,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:17,046 INFO L130 PetriNetUnfolder]: 746/1231 cut-off events. [2023-08-29 21:01:17,046 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-29 21:01:17,048 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 6079 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. [2023-08-29 21:01:17,053 INFO L137 encePairwiseOnDemand]: 592/597 looper letters, 34 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2023-08-29 21:01:17,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 49 transitions, 183 flow [2023-08-29 21:01:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 21:01:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 21:01:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 627 transitions. [2023-08-29 21:01:17,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251256281407035 [2023-08-29 21:01:17,074 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 627 transitions. [2023-08-29 21:01:17,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 627 transitions. [2023-08-29 21:01:17,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:17,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 627 transitions. [2023-08-29 21:01:17,088 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) [2023-08-29 21:01:17,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 597.0) internal successors, (1791), 3 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:17,096 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 597.0) internal successors, (1791), 3 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:17,097 INFO L175 Difference]: Start difference. First operand has 51 places, 54 transitions, 125 flow. Second operand 2 states and 627 transitions. [2023-08-29 21:01:17,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 49 transitions, 183 flow [2023-08-29 21:01:17,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 179 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:17,103 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 111 flow [2023-08-29 21:01:17,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, 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} [2023-08-29 21:01:17,111 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-08-29 21:01:17,111 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 111 flow [2023-08-29 21:01:17,112 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) [2023-08-29 21:01:17,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:17,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:01:17,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:01:17,112 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)] === [2023-08-29 21:01:17,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash 983226, now seen corresponding path program 1 times [2023-08-29 21:01:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:17,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67615971] [2023-08-29 21:01:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:17,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:17,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:17,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67615971] [2023-08-29 21:01:17,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67615971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:17,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:17,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:17,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435827574] [2023-08-29 21:01:17,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:17,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:17,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:17,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:17,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:17,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 597 [2023-08-29 21:01:17,308 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) [2023-08-29 21:01:17,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:17,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 597 [2023-08-29 21:01:17,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:17,599 INFO L130 PetriNetUnfolder]: 1786/2917 cut-off events. [2023-08-29 21:01:17,600 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-08-29 21:01:17,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5532 conditions, 2917 events. 1786/2917 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15537 event pairs, 619 based on Foata normal form. 0/1355 useless extension candidates. Maximal degree in co-relation 5528. Up to 1466 conditions per place. [2023-08-29 21:01:17,614 INFO L137 encePairwiseOnDemand]: 589/597 looper letters, 57 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-08-29 21:01:17,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 77 transitions, 304 flow [2023-08-29 21:01:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 917 transitions. [2023-08-29 21:01:17,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120044667783361 [2023-08-29 21:01:17,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 917 transitions. [2023-08-29 21:01:17,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 917 transitions. [2023-08-29 21:01:17,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:17,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 917 transitions. [2023-08-29 21:01:17,621 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) [2023-08-29 21:01:17,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:17,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:17,626 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 111 flow. Second operand 3 states and 917 transitions. [2023-08-29 21:01:17,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 77 transitions, 304 flow [2023-08-29 21:01:17,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 77 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:01:17,641 INFO L231 Difference]: Finished difference. Result has 49 places, 54 transitions, 161 flow [2023-08-29 21:01:17,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, 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} [2023-08-29 21:01:17,643 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-08-29 21:01:17,643 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 54 transitions, 161 flow [2023-08-29 21:01:17,644 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) [2023-08-29 21:01:17,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:17,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 21:01:17,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:01:17,645 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)] === [2023-08-29 21:01:17,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:17,646 INFO L85 PathProgramCache]: Analyzing trace with hash 984037, now seen corresponding path program 1 times [2023-08-29 21:01:17,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:17,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539561708] [2023-08-29 21:01:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:17,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:17,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:17,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539561708] [2023-08-29 21:01:17,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539561708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:17,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:17,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:17,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387883352] [2023-08-29 21:01:17,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:17,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:17,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 597 [2023-08-29 21:01:17,764 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) [2023-08-29 21:01:17,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:17,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 597 [2023-08-29 21:01:17,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:17,980 INFO L130 PetriNetUnfolder]: 1426/2276 cut-off events. [2023-08-29 21:01:17,982 INFO L131 PetriNetUnfolder]: For 532/585 co-relation queries the response was YES. [2023-08-29 21:01:17,984 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 119. Compared 11161 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. [2023-08-29 21:01:17,993 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 37 selfloop transitions, 0 changer transitions 2/55 dead transitions. [2023-08-29 21:01:17,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 241 flow [2023-08-29 21:01:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 903 transitions. [2023-08-29 21:01:17,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041876046901173 [2023-08-29 21:01:17,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 903 transitions. [2023-08-29 21:01:17,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 903 transitions. [2023-08-29 21:01:17,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:17,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 903 transitions. [2023-08-29 21:01:17,999 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) [2023-08-29 21:01:18,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,003 INFO L175 Difference]: Start difference. First operand has 49 places, 54 transitions, 161 flow. Second operand 3 states and 903 transitions. [2023-08-29 21:01:18,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 241 flow [2023-08-29 21:01:18,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:18,010 INFO L231 Difference]: Finished difference. Result has 50 places, 53 transitions, 147 flow [2023-08-29 21:01:18,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, 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} [2023-08-29 21:01:18,011 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-08-29 21:01:18,011 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 147 flow [2023-08-29 21:01:18,012 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) [2023-08-29 21:01:18,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:18,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:01:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 21:01:18,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-29 21:01:18,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash 30388763, now seen corresponding path program 1 times [2023-08-29 21:01:18,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:18,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342556392] [2023-08-29 21:01:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:18,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:18,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:18,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342556392] [2023-08-29 21:01:18,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342556392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:18,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:18,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:18,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355860686] [2023-08-29 21:01:18,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:18,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:18,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 597 [2023-08-29 21:01:18,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 147 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) [2023-08-29 21:01:18,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:18,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 597 [2023-08-29 21:01:18,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:18,416 INFO L130 PetriNetUnfolder]: 1297/2060 cut-off events. [2023-08-29 21:01:18,417 INFO L131 PetriNetUnfolder]: For 431/481 co-relation queries the response was YES. [2023-08-29 21:01:18,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4458 conditions, 2060 events. 1297/2060 cut-off events. For 431/481 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9869 event pairs, 615 based on Foata normal form. 48/1210 useless extension candidates. Maximal degree in co-relation 4451. Up to 1850 conditions per place. [2023-08-29 21:01:18,430 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 35 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-29 21:01:18,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 215 flow [2023-08-29 21:01:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 901 transitions. [2023-08-29 21:01:18,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503070910106086 [2023-08-29 21:01:18,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 901 transitions. [2023-08-29 21:01:18,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 901 transitions. [2023-08-29 21:01:18,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:18,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 901 transitions. [2023-08-29 21:01:18,439 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) [2023-08-29 21:01:18,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,444 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 147 flow. Second operand 3 states and 901 transitions. [2023-08-29 21:01:18,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 215 flow [2023-08-29 21:01:18,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 211 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:18,447 INFO L231 Difference]: Finished difference. Result has 48 places, 51 transitions, 141 flow [2023-08-29 21:01:18,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=51} [2023-08-29 21:01:18,449 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-08-29 21:01:18,449 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 51 transitions, 141 flow [2023-08-29 21:01:18,450 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) [2023-08-29 21:01:18,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:18,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:01:18,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:01:18,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (and 25 more)] === [2023-08-29 21:01:18,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 30388764, now seen corresponding path program 1 times [2023-08-29 21:01:18,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:18,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966178224] [2023-08-29 21:01:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:18,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:18,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:18,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966178224] [2023-08-29 21:01:18,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966178224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:18,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:18,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:01:18,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708042719] [2023-08-29 21:01:18,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:18,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:18,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:18,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:18,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 597 [2023-08-29 21:01:18,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 51 transitions, 141 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) [2023-08-29 21:01:18,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:18,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 597 [2023-08-29 21:01:18,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:18,856 INFO L130 PetriNetUnfolder]: 1631/2634 cut-off events. [2023-08-29 21:01:18,856 INFO L131 PetriNetUnfolder]: For 322/470 co-relation queries the response was YES. [2023-08-29 21:01:18,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5539 conditions, 2634 events. 1631/2634 cut-off events. For 322/470 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13613 event pairs, 652 based on Foata normal form. 100/1650 useless extension candidates. Maximal degree in co-relation 5532. Up to 1470 conditions per place. [2023-08-29 21:01:18,868 INFO L137 encePairwiseOnDemand]: 592/597 looper letters, 64 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-29 21:01:18,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 363 flow [2023-08-29 21:01:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 924 transitions. [2023-08-29 21:01:18,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159128978224455 [2023-08-29 21:01:18,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 924 transitions. [2023-08-29 21:01:18,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 924 transitions. [2023-08-29 21:01:18,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:18,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 924 transitions. [2023-08-29 21:01:18,873 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) [2023-08-29 21:01:18,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:18,877 INFO L175 Difference]: Start difference. First operand has 48 places, 51 transitions, 141 flow. Second operand 3 states and 924 transitions. [2023-08-29 21:01:18,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 363 flow [2023-08-29 21:01:18,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 82 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:18,879 INFO L231 Difference]: Finished difference. Result has 50 places, 54 transitions, 172 flow [2023-08-29 21:01:18,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=50, PETRI_TRANSITIONS=54} [2023-08-29 21:01:18,880 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-08-29 21:01:18,880 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 54 transitions, 172 flow [2023-08-29 21:01:18,881 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) [2023-08-29 21:01:18,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:18,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:01:18,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:01:18,881 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)] === [2023-08-29 21:01:18,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash 942098064, now seen corresponding path program 1 times [2023-08-29 21:01:18,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:18,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281610284] [2023-08-29 21:01:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:18,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:18,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:18,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281610284] [2023-08-29 21:01:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281610284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:18,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:18,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:18,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172017043] [2023-08-29 21:01:18,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:18,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:01:18,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:01:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:01:19,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 597 [2023-08-29 21:01:19,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 54 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:19,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:19,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 597 [2023-08-29 21:01:19,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:19,430 INFO L130 PetriNetUnfolder]: 2069/3326 cut-off events. [2023-08-29 21:01:19,430 INFO L131 PetriNetUnfolder]: For 375/512 co-relation queries the response was YES. [2023-08-29 21:01:19,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7053 conditions, 3326 events. 2069/3326 cut-off events. For 375/512 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18237 event pairs, 804 based on Foata normal form. 52/2032 useless extension candidates. Maximal degree in co-relation 7045. Up to 1682 conditions per place. [2023-08-29 21:01:19,446 INFO L137 encePairwiseOnDemand]: 592/597 looper letters, 88 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2023-08-29 21:01:19,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 108 transitions, 510 flow [2023-08-29 21:01:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:01:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:01:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1233 transitions. [2023-08-29 21:01:19,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163316582914573 [2023-08-29 21:01:19,450 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1233 transitions. [2023-08-29 21:01:19,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1233 transitions. [2023-08-29 21:01:19,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:19,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1233 transitions. [2023-08-29 21:01:19,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 308.25) internal successors, (1233), 4 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:19,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:19,459 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:19,459 INFO L175 Difference]: Start difference. First operand has 50 places, 54 transitions, 172 flow. Second operand 4 states and 1233 transitions. [2023-08-29 21:01:19,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 108 transitions, 510 flow [2023-08-29 21:01:19,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 108 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:19,462 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 216 flow [2023-08-29 21:01:19,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, 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=4, PETRI_FLOW=216, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-08-29 21:01:19,463 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-29 21:01:19,463 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 216 flow [2023-08-29 21:01:19,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:19,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:19,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:01:19,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:01:19,464 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)] === [2023-08-29 21:01:19,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 942098065, now seen corresponding path program 1 times [2023-08-29 21:01:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:19,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614287379] [2023-08-29 21:01:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:19,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:19,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614287379] [2023-08-29 21:01:19,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614287379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:19,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:19,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:19,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4790622] [2023-08-29 21:01:19,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:19,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:01:19,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:19,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:01:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:01:19,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 597 [2023-08-29 21:01:19,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 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) [2023-08-29 21:01:19,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:19,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 597 [2023-08-29 21:01:19,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:19,909 INFO L130 PetriNetUnfolder]: 1663/2711 cut-off events. [2023-08-29 21:01:19,909 INFO L131 PetriNetUnfolder]: For 471/610 co-relation queries the response was YES. [2023-08-29 21:01:19,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5866 conditions, 2711 events. 1663/2711 cut-off events. For 471/610 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14313 event pairs, 830 based on Foata normal form. 153/1792 useless extension candidates. Maximal degree in co-relation 5856. Up to 2426 conditions per place. [2023-08-29 21:01:19,924 INFO L137 encePairwiseOnDemand]: 595/597 looper letters, 40 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-29 21:01:19,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 296 flow [2023-08-29 21:01:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-29 21:01:19,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058626465661642 [2023-08-29 21:01:19,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-29 21:01:19,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-29 21:01:19,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:19,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-29 21:01:19,930 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) [2023-08-29 21:01:19,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:19,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:19,933 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 216 flow. Second operand 3 states and 906 transitions. [2023-08-29 21:01:19,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 296 flow [2023-08-29 21:01:19,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:19,936 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 212 flow [2023-08-29 21:01:19,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=212, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-29 21:01:19,937 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-29 21:01:19,937 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 212 flow [2023-08-29 21:01:19,937 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) [2023-08-29 21:01:19,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:19,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:01:19,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:01:19,938 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)] === [2023-08-29 21:01:19,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash -861160068, now seen corresponding path program 1 times [2023-08-29 21:01:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:19,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553970952] [2023-08-29 21:01:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:19,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553970952] [2023-08-29 21:01:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553970952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:20,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460247174] [2023-08-29 21:01:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:20,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:01:20,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:01:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:01:20,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 597 [2023-08-29 21:01:20,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 212 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) [2023-08-29 21:01:20,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:20,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 597 [2023-08-29 21:01:20,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:20,402 INFO L130 PetriNetUnfolder]: 2100/3409 cut-off events. [2023-08-29 21:01:20,403 INFO L131 PetriNetUnfolder]: For 502/700 co-relation queries the response was YES. [2023-08-29 21:01:20,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7396 conditions, 3409 events. 2100/3409 cut-off events. For 502/700 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18581 event pairs, 583 based on Foata normal form. 72/2278 useless extension candidates. Maximal degree in co-relation 7385. Up to 1532 conditions per place. [2023-08-29 21:01:20,419 INFO L137 encePairwiseOnDemand]: 588/597 looper letters, 79 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2023-08-29 21:01:20,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 526 flow [2023-08-29 21:01:20,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:01:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:01:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1497 transitions. [2023-08-29 21:01:20,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015075376884423 [2023-08-29 21:01:20,424 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1497 transitions. [2023-08-29 21:01:20,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1497 transitions. [2023-08-29 21:01:20,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:20,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1497 transitions. [2023-08-29 21:01:20,428 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) [2023-08-29 21:01:20,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 597.0) internal successors, (3582), 6 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:20,433 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 597.0) internal successors, (3582), 6 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:20,433 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 212 flow. Second operand 5 states and 1497 transitions. [2023-08-29 21:01:20,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 526 flow [2023-08-29 21:01:20,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 105 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:20,436 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 295 flow [2023-08-29 21:01:20,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=295, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2023-08-29 21:01:20,437 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-29 21:01:20,437 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 295 flow [2023-08-29 21:01:20,438 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) [2023-08-29 21:01:20,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:20,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:20,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:01:20,439 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)] === [2023-08-29 21:01:20,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:20,439 INFO L85 PathProgramCache]: Analyzing trace with hash -928331867, now seen corresponding path program 1 times [2023-08-29 21:01:20,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:20,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489721037] [2023-08-29 21:01:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:20,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:20,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:20,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489721037] [2023-08-29 21:01:20,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489721037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:20,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:20,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:20,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487293967] [2023-08-29 21:01:20,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:20,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:20,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:20,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 597 [2023-08-29 21:01:20,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 295 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) [2023-08-29 21:01:20,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:20,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 597 [2023-08-29 21:01:20,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:20,837 INFO L130 PetriNetUnfolder]: 1946/3247 cut-off events. [2023-08-29 21:01:20,837 INFO L131 PetriNetUnfolder]: For 1885/2108 co-relation queries the response was YES. [2023-08-29 21:01:20,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8698 conditions, 3247 events. 1946/3247 cut-off events. For 1885/2108 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18293 event pairs, 684 based on Foata normal form. 101/2751 useless extension candidates. Maximal degree in co-relation 8684. Up to 2207 conditions per place. [2023-08-29 21:01:20,857 INFO L137 encePairwiseOnDemand]: 589/597 looper letters, 52 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2023-08-29 21:01:20,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 483 flow [2023-08-29 21:01:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2023-08-29 21:01:20,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919039642657733 [2023-08-29 21:01:20,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2023-08-29 21:01:20,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2023-08-29 21:01:20,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:20,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2023-08-29 21:01:20,864 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) [2023-08-29 21:01:20,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:20,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:20,868 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 295 flow. Second operand 3 states and 881 transitions. [2023-08-29 21:01:20,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 483 flow [2023-08-29 21:01:20,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 483 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:01:20,876 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 377 flow [2023-08-29 21:01:20,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=62, 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=377, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-08-29 21:01:20,878 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-29 21:01:20,878 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 377 flow [2023-08-29 21:01:20,879 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) [2023-08-29 21:01:20,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:20,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:01:20,879 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)] === [2023-08-29 21:01:20,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1367450956, now seen corresponding path program 1 times [2023-08-29 21:01:20,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:20,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170472903] [2023-08-29 21:01:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:20,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:20,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:20,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170472903] [2023-08-29 21:01:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170472903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:20,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:20,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:20,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500670105] [2023-08-29 21:01:20,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:20,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:20,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:20,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:20,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 597 [2023-08-29 21:01:20,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 377 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) [2023-08-29 21:01:20,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:20,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 597 [2023-08-29 21:01:20,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:21,363 INFO L130 PetriNetUnfolder]: 2185/3501 cut-off events. [2023-08-29 21:01:21,364 INFO L131 PetriNetUnfolder]: For 3357/3593 co-relation queries the response was YES. [2023-08-29 21:01:21,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10664 conditions, 3501 events. 2185/3501 cut-off events. For 3357/3593 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18396 event pairs, 475 based on Foata normal form. 245/3150 useless extension candidates. Maximal degree in co-relation 10648. Up to 1635 conditions per place. [2023-08-29 21:01:21,384 INFO L137 encePairwiseOnDemand]: 589/597 looper letters, 71 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2023-08-29 21:01:21,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 748 flow [2023-08-29 21:01:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 914 transitions. [2023-08-29 21:01:21,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103294249022893 [2023-08-29 21:01:21,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 914 transitions. [2023-08-29 21:01:21,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 914 transitions. [2023-08-29 21:01:21,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:21,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 914 transitions. [2023-08-29 21:01:21,390 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) [2023-08-29 21:01:21,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:21,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:21,393 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 377 flow. Second operand 3 states and 914 transitions. [2023-08-29 21:01:21,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 748 flow [2023-08-29 21:01:21,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 102 transitions, 702 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:21,402 INFO L231 Difference]: Finished difference. Result has 68 places, 80 transitions, 539 flow [2023-08-29 21:01:21,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=64, 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=539, PETRI_PLACES=68, PETRI_TRANSITIONS=80} [2023-08-29 21:01:21,404 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-08-29 21:01:21,404 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 80 transitions, 539 flow [2023-08-29 21:01:21,405 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) [2023-08-29 21:01:21,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:21,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:21,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:01:21,405 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)] === [2023-08-29 21:01:21,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1245175103, now seen corresponding path program 1 times [2023-08-29 21:01:21,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:21,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567392391] [2023-08-29 21:01:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:21,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:21,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567392391] [2023-08-29 21:01:21,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567392391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:21,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:21,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:21,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810261167] [2023-08-29 21:01:21,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:21,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:21,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:21,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 597 [2023-08-29 21:01:21,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 80 transitions, 539 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) [2023-08-29 21:01:21,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:21,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 597 [2023-08-29 21:01:21,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:21,690 INFO L130 PetriNetUnfolder]: 1169/1896 cut-off events. [2023-08-29 21:01:21,691 INFO L131 PetriNetUnfolder]: For 3299/3330 co-relation queries the response was YES. [2023-08-29 21:01:21,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6199 conditions, 1896 events. 1169/1896 cut-off events. For 3299/3330 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9126 event pairs, 266 based on Foata normal form. 154/1735 useless extension candidates. Maximal degree in co-relation 6182. Up to 1248 conditions per place. [2023-08-29 21:01:21,702 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 95 selfloop transitions, 3 changer transitions 0/114 dead transitions. [2023-08-29 21:01:21,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 114 transitions, 962 flow [2023-08-29 21:01:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 918 transitions. [2023-08-29 21:01:21,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125628140703518 [2023-08-29 21:01:21,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 918 transitions. [2023-08-29 21:01:21,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 918 transitions. [2023-08-29 21:01:21,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:21,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 918 transitions. [2023-08-29 21:01:21,709 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) [2023-08-29 21:01:21,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:21,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:21,712 INFO L175 Difference]: Start difference. First operand has 68 places, 80 transitions, 539 flow. Second operand 3 states and 918 transitions. [2023-08-29 21:01:21,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 114 transitions, 962 flow [2023-08-29 21:01:21,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 114 transitions, 916 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:21,721 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 449 flow [2023-08-29 21:01:21,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=66, 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=449, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-08-29 21:01:21,721 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-08-29 21:01:21,722 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 449 flow [2023-08-29 21:01:21,722 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) [2023-08-29 21:01:21,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:21,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:21,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:01:21,723 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)] === [2023-08-29 21:01:21,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:21,724 INFO L85 PathProgramCache]: Analyzing trace with hash -139577290, now seen corresponding path program 1 times [2023-08-29 21:01:21,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:21,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622546057] [2023-08-29 21:01:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:21,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:21,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622546057] [2023-08-29 21:01:21,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622546057] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:21,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:21,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:21,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986264758] [2023-08-29 21:01:21,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:21,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:21,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:21,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 597 [2023-08-29 21:01:21,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 449 flow. Second operand has 3 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) [2023-08-29 21:01:21,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:21,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 597 [2023-08-29 21:01:21,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:22,016 INFO L130 PetriNetUnfolder]: 1244/2048 cut-off events. [2023-08-29 21:01:22,016 INFO L131 PetriNetUnfolder]: For 2963/2987 co-relation queries the response was YES. [2023-08-29 21:01:22,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6669 conditions, 2048 events. 1244/2048 cut-off events. For 2963/2987 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9742 event pairs, 461 based on Foata normal form. 55/1768 useless extension candidates. Maximal degree in co-relation 6652. Up to 1723 conditions per place. [2023-08-29 21:01:22,029 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 64 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-29 21:01:22,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 629 flow [2023-08-29 21:01:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 915 transitions. [2023-08-29 21:01:22,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108877721943048 [2023-08-29 21:01:22,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 915 transitions. [2023-08-29 21:01:22,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 915 transitions. [2023-08-29 21:01:22,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:22,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 915 transitions. [2023-08-29 21:01:22,035 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) [2023-08-29 21:01:22,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:22,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:22,039 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 449 flow. Second operand 3 states and 915 transitions. [2023-08-29 21:01:22,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 629 flow [2023-08-29 21:01:22,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 82 transitions, 617 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:22,046 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 463 flow [2023-08-29 21:01:22,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=463, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-08-29 21:01:22,048 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-29 21:01:22,048 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 463 flow [2023-08-29 21:01:22,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-29 21:01:22,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:22,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:22,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:01:22,050 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)] === [2023-08-29 21:01:22,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1324724026, now seen corresponding path program 1 times [2023-08-29 21:01:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:22,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695194810] [2023-08-29 21:01:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:22,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:22,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:22,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695194810] [2023-08-29 21:01:22,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695194810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:22,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:22,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:22,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688855927] [2023-08-29 21:01:22,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:22,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:22,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:22,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:22,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:22,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 597 [2023-08-29 21:01:22,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 463 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) [2023-08-29 21:01:22,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:22,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 597 [2023-08-29 21:01:22,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:22,556 INFO L130 PetriNetUnfolder]: 1421/2556 cut-off events. [2023-08-29 21:01:22,556 INFO L131 PetriNetUnfolder]: For 3648/3670 co-relation queries the response was YES. [2023-08-29 21:01:22,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8047 conditions, 2556 events. 1421/2556 cut-off events. For 3648/3670 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14742 event pairs, 411 based on Foata normal form. 27/2212 useless extension candidates. Maximal degree in co-relation 8029. Up to 1428 conditions per place. [2023-08-29 21:01:22,578 INFO L137 encePairwiseOnDemand]: 592/597 looper letters, 93 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2023-08-29 21:01:22,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 121 transitions, 1017 flow [2023-08-29 21:01:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 915 transitions. [2023-08-29 21:01:22,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108877721943048 [2023-08-29 21:01:22,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 915 transitions. [2023-08-29 21:01:22,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 915 transitions. [2023-08-29 21:01:22,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:22,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 915 transitions. [2023-08-29 21:01:22,585 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) [2023-08-29 21:01:22,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:22,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:22,588 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 463 flow. Second operand 3 states and 915 transitions. [2023-08-29 21:01:22,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 121 transitions, 1017 flow [2023-08-29 21:01:22,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 1013 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:22,597 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 629 flow [2023-08-29 21:01:22,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=629, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2023-08-29 21:01:22,599 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-08-29 21:01:22,599 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 629 flow [2023-08-29 21:01:22,600 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) [2023-08-29 21:01:22,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:22,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:22,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:01:22,601 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)] === [2023-08-29 21:01:22,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash 693666405, now seen corresponding path program 1 times [2023-08-29 21:01:22,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:22,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075691226] [2023-08-29 21:01:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:22,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:22,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:22,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075691226] [2023-08-29 21:01:22,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075691226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:22,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:22,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:22,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431224065] [2023-08-29 21:01:22,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:22,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:22,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:22,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 597 [2023-08-29 21:01:22,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 629 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) [2023-08-29 21:01:22,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:22,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 597 [2023-08-29 21:01:22,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:23,089 INFO L130 PetriNetUnfolder]: 1399/2482 cut-off events. [2023-08-29 21:01:23,090 INFO L131 PetriNetUnfolder]: For 4529/4557 co-relation queries the response was YES. [2023-08-29 21:01:23,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8274 conditions, 2482 events. 1399/2482 cut-off events. For 4529/4557 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13961 event pairs, 405 based on Foata normal form. 45/2162 useless extension candidates. Maximal degree in co-relation 8255. Up to 1148 conditions per place. [2023-08-29 21:01:23,103 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 101 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2023-08-29 21:01:23,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 121 transitions, 1106 flow [2023-08-29 21:01:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 924 transitions. [2023-08-29 21:01:23,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159128978224455 [2023-08-29 21:01:23,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 924 transitions. [2023-08-29 21:01:23,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 924 transitions. [2023-08-29 21:01:23,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:23,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 924 transitions. [2023-08-29 21:01:23,108 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) [2023-08-29 21:01:23,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,111 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 629 flow. Second operand 3 states and 924 transitions. [2023-08-29 21:01:23,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 121 transitions, 1106 flow [2023-08-29 21:01:23,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 121 transitions, 1080 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:23,120 INFO L231 Difference]: Finished difference. Result has 71 places, 81 transitions, 611 flow [2023-08-29 21:01:23,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=611, PETRI_PLACES=71, PETRI_TRANSITIONS=81} [2023-08-29 21:01:23,121 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-08-29 21:01:23,121 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 81 transitions, 611 flow [2023-08-29 21:01:23,121 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) [2023-08-29 21:01:23,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:23,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:23,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:01:23,122 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)] === [2023-08-29 21:01:23,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash -31898864, now seen corresponding path program 1 times [2023-08-29 21:01:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:23,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239466918] [2023-08-29 21:01:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:23,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239466918] [2023-08-29 21:01:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239466918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:23,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:23,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:23,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822513745] [2023-08-29 21:01:23,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:23,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:23,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 597 [2023-08-29 21:01:23,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 81 transitions, 611 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) [2023-08-29 21:01:23,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:23,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 597 [2023-08-29 21:01:23,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:23,316 INFO L130 PetriNetUnfolder]: 505/995 cut-off events. [2023-08-29 21:01:23,316 INFO L131 PetriNetUnfolder]: For 1989/1991 co-relation queries the response was YES. [2023-08-29 21:01:23,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3136 conditions, 995 events. 505/995 cut-off events. For 1989/1991 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4794 event pairs, 109 based on Foata normal form. 147/1011 useless extension candidates. Maximal degree in co-relation 3117. Up to 448 conditions per place. [2023-08-29 21:01:23,322 INFO L137 encePairwiseOnDemand]: 591/597 looper letters, 43 selfloop transitions, 14 changer transitions 2/71 dead transitions. [2023-08-29 21:01:23,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 71 transitions, 635 flow [2023-08-29 21:01:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 880 transitions. [2023-08-29 21:01:23,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49134561697375767 [2023-08-29 21:01:23,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 880 transitions. [2023-08-29 21:01:23,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 880 transitions. [2023-08-29 21:01:23,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:23,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 880 transitions. [2023-08-29 21:01:23,327 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) [2023-08-29 21:01:23,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,330 INFO L175 Difference]: Start difference. First operand has 71 places, 81 transitions, 611 flow. Second operand 3 states and 880 transitions. [2023-08-29 21:01:23,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 71 transitions, 635 flow [2023-08-29 21:01:23,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 558 flow, removed 19 selfloop flow, removed 7 redundant places. [2023-08-29 21:01:23,335 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 434 flow [2023-08-29 21:01:23,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=434, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-08-29 21:01:23,336 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-08-29 21:01:23,336 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 434 flow [2023-08-29 21:01:23,336 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) [2023-08-29 21:01:23,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:23,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:23,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:01:23,337 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)] === [2023-08-29 21:01:23,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:23,337 INFO L85 PathProgramCache]: Analyzing trace with hash 28836764, now seen corresponding path program 1 times [2023-08-29 21:01:23,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:23,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104725339] [2023-08-29 21:01:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:23,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:23,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:23,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104725339] [2023-08-29 21:01:23,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104725339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:23,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:23,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:23,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268237274] [2023-08-29 21:01:23,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:23,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:23,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:23,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:23,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:23,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 597 [2023-08-29 21:01:23,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 434 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) [2023-08-29 21:01:23,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:23,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 597 [2023-08-29 21:01:23,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:23,553 INFO L130 PetriNetUnfolder]: 505/947 cut-off events. [2023-08-29 21:01:23,554 INFO L131 PetriNetUnfolder]: For 1185/1186 co-relation queries the response was YES. [2023-08-29 21:01:23,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 947 events. 505/947 cut-off events. For 1185/1186 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4302 event pairs, 239 based on Foata normal form. 3/819 useless extension candidates. Maximal degree in co-relation 2661. Up to 789 conditions per place. [2023-08-29 21:01:23,559 INFO L137 encePairwiseOnDemand]: 595/597 looper letters, 45 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-29 21:01:23,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 526 flow [2023-08-29 21:01:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 883 transitions. [2023-08-29 21:01:23,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49302065884980456 [2023-08-29 21:01:23,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 883 transitions. [2023-08-29 21:01:23,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 883 transitions. [2023-08-29 21:01:23,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:23,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 883 transitions. [2023-08-29 21:01:23,565 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) [2023-08-29 21:01:23,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,568 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 434 flow. Second operand 3 states and 883 transitions. [2023-08-29 21:01:23,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 526 flow [2023-08-29 21:01:23,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 493 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:01:23,573 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 403 flow [2023-08-29 21:01:23,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=403, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-08-29 21:01:23,573 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-08-29 21:01:23,574 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 403 flow [2023-08-29 21:01:23,574 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) [2023-08-29 21:01:23,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:23,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:23,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:01:23,575 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)] === [2023-08-29 21:01:23,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:23,575 INFO L85 PathProgramCache]: Analyzing trace with hash 893941605, now seen corresponding path program 1 times [2023-08-29 21:01:23,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:23,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452659816] [2023-08-29 21:01:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:23,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:23,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:23,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452659816] [2023-08-29 21:01:23,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452659816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:23,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:23,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:23,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868756776] [2023-08-29 21:01:23,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:23,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:01:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:01:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:01:23,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 597 [2023-08-29 21:01:23,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 403 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) [2023-08-29 21:01:23,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:23,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 597 [2023-08-29 21:01:23,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:23,920 INFO L130 PetriNetUnfolder]: 504/963 cut-off events. [2023-08-29 21:01:23,920 INFO L131 PetriNetUnfolder]: For 841/841 co-relation queries the response was YES. [2023-08-29 21:01:23,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2589 conditions, 963 events. 504/963 cut-off events. For 841/841 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4371 event pairs, 145 based on Foata normal form. 1/833 useless extension candidates. Maximal degree in co-relation 2573. Up to 578 conditions per place. [2023-08-29 21:01:23,926 INFO L137 encePairwiseOnDemand]: 592/597 looper letters, 64 selfloop transitions, 4 changer transitions 14/92 dead transitions. [2023-08-29 21:01:23,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 92 transitions, 691 flow [2023-08-29 21:01:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:01:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:01:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1191 transitions. [2023-08-29 21:01:23,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49874371859296485 [2023-08-29 21:01:23,929 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1191 transitions. [2023-08-29 21:01:23,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1191 transitions. [2023-08-29 21:01:23,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:23,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1191 transitions. [2023-08-29 21:01:23,932 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) [2023-08-29 21:01:23,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,935 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:23,935 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 403 flow. Second operand 4 states and 1191 transitions. [2023-08-29 21:01:23,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 92 transitions, 691 flow [2023-08-29 21:01:23,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 688 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:01:23,940 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 395 flow [2023-08-29 21:01:23,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=395, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-08-29 21:01:23,941 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-08-29 21:01:23,941 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 395 flow [2023-08-29 21:01:23,941 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) [2023-08-29 21:01:23,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:23,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:23,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:01:23,942 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)] === [2023-08-29 21:01:23,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1754871932, now seen corresponding path program 1 times [2023-08-29 21:01:23,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:23,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751650315] [2023-08-29 21:01:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:23,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:01:24,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:24,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751650315] [2023-08-29 21:01:24,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751650315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:24,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:24,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:24,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19747986] [2023-08-29 21:01:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:24,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:24,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:24,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 597 [2023-08-29 21:01:24,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 395 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) [2023-08-29 21:01:24,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:24,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 597 [2023-08-29 21:01:24,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:24,218 INFO L130 PetriNetUnfolder]: 497/956 cut-off events. [2023-08-29 21:01:24,218 INFO L131 PetriNetUnfolder]: For 1128/1130 co-relation queries the response was YES. [2023-08-29 21:01:24,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2730 conditions, 956 events. 497/956 cut-off events. For 1128/1130 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4519 event pairs, 166 based on Foata normal form. 0/840 useless extension candidates. Maximal degree in co-relation 2712. Up to 552 conditions per place. [2023-08-29 21:01:24,223 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 37 selfloop transitions, 15 changer transitions 0/62 dead transitions. [2023-08-29 21:01:24,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 62 transitions, 519 flow [2023-08-29 21:01:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-08-29 21:01:24,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047459519821329 [2023-08-29 21:01:24,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-08-29 21:01:24,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-08-29 21:01:24,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:24,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-08-29 21:01:24,228 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) [2023-08-29 21:01:24,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:24,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:24,231 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 395 flow. Second operand 3 states and 904 transitions. [2023-08-29 21:01:24,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 62 transitions, 519 flow [2023-08-29 21:01:24,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 496 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-29 21:01:24,236 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 400 flow [2023-08-29 21:01:24,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=400, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2023-08-29 21:01:24,236 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-29 21:01:24,236 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 400 flow [2023-08-29 21:01:24,237 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) [2023-08-29 21:01:24,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:24,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:24,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 21:01:24,237 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)] === [2023-08-29 21:01:24,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:24,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1754871931, now seen corresponding path program 1 times [2023-08-29 21:01:24,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:24,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144248219] [2023-08-29 21:01:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:24,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:01:24,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:24,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144248219] [2023-08-29 21:01:24,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144248219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:24,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:24,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:01:24,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077598991] [2023-08-29 21:01:24,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:24,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:24,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 597 [2023-08-29 21:01:24,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 400 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) [2023-08-29 21:01:24,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:24,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 597 [2023-08-29 21:01:24,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:24,476 INFO L130 PetriNetUnfolder]: 497/942 cut-off events. [2023-08-29 21:01:24,476 INFO L131 PetriNetUnfolder]: For 1226/1228 co-relation queries the response was YES. [2023-08-29 21:01:24,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2719 conditions, 942 events. 497/942 cut-off events. For 1226/1228 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4397 event pairs, 166 based on Foata normal form. 0/826 useless extension candidates. Maximal degree in co-relation 2704. Up to 552 conditions per place. [2023-08-29 21:01:24,482 INFO L137 encePairwiseOnDemand]: 594/597 looper letters, 37 selfloop transitions, 15 changer transitions 0/61 dead transitions. [2023-08-29 21:01:24,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 524 flow [2023-08-29 21:01:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2023-08-29 21:01:24,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980457844779453 [2023-08-29 21:01:24,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2023-08-29 21:01:24,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2023-08-29 21:01:24,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:24,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2023-08-29 21:01:24,487 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) [2023-08-29 21:01:24,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:24,490 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:24,490 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 400 flow. Second operand 3 states and 892 transitions. [2023-08-29 21:01:24,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 524 flow [2023-08-29 21:01:24,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 494 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:24,494 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 398 flow [2023-08-29 21:01:24,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2023-08-29 21:01:24,495 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-29 21:01:24,495 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 398 flow [2023-08-29 21:01:24,495 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) [2023-08-29 21:01:24,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:24,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:24,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:01:24,496 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)] === [2023-08-29 21:01:24,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1490053595, now seen corresponding path program 1 times [2023-08-29 21:01:24,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:24,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618507921] [2023-08-29 21:01:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:24,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:01:24,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618507921] [2023-08-29 21:01:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618507921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:24,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:24,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:01:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156833874] [2023-08-29 21:01:24,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:24,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:01:24,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:24,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:01:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:01:24,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 597 [2023-08-29 21:01:24,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 398 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) [2023-08-29 21:01:24,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:24,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 597 [2023-08-29 21:01:24,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:24,859 INFO L130 PetriNetUnfolder]: 603/1030 cut-off events. [2023-08-29 21:01:24,859 INFO L131 PetriNetUnfolder]: For 1276/1276 co-relation queries the response was YES. [2023-08-29 21:01:24,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2988 conditions, 1030 events. 603/1030 cut-off events. For 1276/1276 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4467 event pairs, 171 based on Foata normal form. 40/930 useless extension candidates. Maximal degree in co-relation 2973. Up to 542 conditions per place. [2023-08-29 21:01:24,865 INFO L137 encePairwiseOnDemand]: 591/597 looper letters, 34 selfloop transitions, 18 changer transitions 0/59 dead transitions. [2023-08-29 21:01:24,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 59 transitions, 514 flow [2023-08-29 21:01:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:01:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:01:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1147 transitions. [2023-08-29 21:01:24,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803182579564489 [2023-08-29 21:01:24,868 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1147 transitions. [2023-08-29 21:01:24,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1147 transitions. [2023-08-29 21:01:24,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:24,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1147 transitions. [2023-08-29 21:01:24,871 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) [2023-08-29 21:01:24,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:24,874 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:24,874 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 398 flow. Second operand 4 states and 1147 transitions. [2023-08-29 21:01:24,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 59 transitions, 514 flow [2023-08-29 21:01:24,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 476 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-29 21:01:24,878 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 386 flow [2023-08-29 21:01:24,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=386, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-08-29 21:01:24,879 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-29 21:01:24,879 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 386 flow [2023-08-29 21:01:24,879 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) [2023-08-29 21:01:24,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:24,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:24,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 21:01:24,880 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)] === [2023-08-29 21:01:24,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1921917064, now seen corresponding path program 1 times [2023-08-29 21:01:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:24,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697837170] [2023-08-29 21:01:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:01:25,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:25,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697837170] [2023-08-29 21:01:25,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697837170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:25,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:25,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:25,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385895932] [2023-08-29 21:01:25,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:25,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:01:25,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:25,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:01:25,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:01:25,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 597 [2023-08-29 21:01:25,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:25,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:25,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 597 [2023-08-29 21:01:25,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:25,340 INFO L130 PetriNetUnfolder]: 731/1189 cut-off events. [2023-08-29 21:01:25,340 INFO L131 PetriNetUnfolder]: For 1635/1635 co-relation queries the response was YES. [2023-08-29 21:01:25,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3511 conditions, 1189 events. 731/1189 cut-off events. For 1635/1635 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4847 event pairs, 264 based on Foata normal form. 69/1097 useless extension candidates. Maximal degree in co-relation 3496. Up to 780 conditions per place. [2023-08-29 21:01:25,345 INFO L137 encePairwiseOnDemand]: 592/597 looper letters, 36 selfloop transitions, 18 changer transitions 1/60 dead transitions. [2023-08-29 21:01:25,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 524 flow [2023-08-29 21:01:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:01:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:01:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1164 transitions. [2023-08-29 21:01:25,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48743718592964824 [2023-08-29 21:01:25,349 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1164 transitions. [2023-08-29 21:01:25,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1164 transitions. [2023-08-29 21:01:25,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:25,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1164 transitions. [2023-08-29 21:01:25,351 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) [2023-08-29 21:01:25,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:25,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:25,354 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 386 flow. Second operand 4 states and 1164 transitions. [2023-08-29 21:01:25,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 524 flow [2023-08-29 21:01:25,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 483 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:01:25,359 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 371 flow [2023-08-29 21:01:25,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=371, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-08-29 21:01:25,359 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-29 21:01:25,359 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 371 flow [2023-08-29 21:01:25,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:25,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:25,360 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] [2023-08-29 21:01:25,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 21:01:25,360 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)] === [2023-08-29 21:01:25,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash 164418903, now seen corresponding path program 1 times [2023-08-29 21:01:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:25,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779432229] [2023-08-29 21:01:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:25,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:01:25,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:25,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779432229] [2023-08-29 21:01:25,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779432229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:25,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:25,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:25,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183003071] [2023-08-29 21:01:25,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:25,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:01:25,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:25,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:01:25,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:01:25,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 597 [2023-08-29 21:01:25,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 371 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) [2023-08-29 21:01:25,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:25,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 597 [2023-08-29 21:01:25,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:25,761 INFO L130 PetriNetUnfolder]: 592/1082 cut-off events. [2023-08-29 21:01:25,762 INFO L131 PetriNetUnfolder]: For 1572/1572 co-relation queries the response was YES. [2023-08-29 21:01:25,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3143 conditions, 1082 events. 592/1082 cut-off events. For 1572/1572 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5058 event pairs, 164 based on Foata normal form. 0/926 useless extension candidates. Maximal degree in co-relation 3129. Up to 528 conditions per place. [2023-08-29 21:01:25,768 INFO L137 encePairwiseOnDemand]: 591/597 looper letters, 60 selfloop transitions, 23 changer transitions 0/89 dead transitions. [2023-08-29 21:01:25,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 89 transitions, 801 flow [2023-08-29 21:01:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:01:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:01:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1185 transitions. [2023-08-29 21:01:25,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962311557788945 [2023-08-29 21:01:25,772 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1185 transitions. [2023-08-29 21:01:25,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1185 transitions. [2023-08-29 21:01:25,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:25,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1185 transitions. [2023-08-29 21:01:25,775 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) [2023-08-29 21:01:25,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:25,778 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:25,778 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 371 flow. Second operand 4 states and 1185 transitions. [2023-08-29 21:01:25,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 89 transitions, 801 flow [2023-08-29 21:01:25,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 89 transitions, 743 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:01:25,783 INFO L231 Difference]: Finished difference. Result has 57 places, 62 transitions, 597 flow [2023-08-29 21:01:25,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=597, PETRI_PLACES=57, PETRI_TRANSITIONS=62} [2023-08-29 21:01:25,784 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-29 21:01:25,784 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 62 transitions, 597 flow [2023-08-29 21:01:25,784 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) [2023-08-29 21:01:25,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:25,784 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] [2023-08-29 21:01:25,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 21:01:25,785 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)] === [2023-08-29 21:01:25,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:25,785 INFO L85 PathProgramCache]: Analyzing trace with hash -382263345, now seen corresponding path program 2 times [2023-08-29 21:01:25,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:25,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313669522] [2023-08-29 21:01:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:25,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:01:25,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:25,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313669522] [2023-08-29 21:01:25,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313669522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:25,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:25,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 21:01:25,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756591518] [2023-08-29 21:01:25,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:25,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:01:25,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:25,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:01:25,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:01:26,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 597 [2023-08-29 21:01:26,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 62 transitions, 597 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) [2023-08-29 21:01:26,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:26,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 597 [2023-08-29 21:01:26,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:26,240 INFO L130 PetriNetUnfolder]: 592/1080 cut-off events. [2023-08-29 21:01:26,241 INFO L131 PetriNetUnfolder]: For 2117/2117 co-relation queries the response was YES. [2023-08-29 21:01:26,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3302 conditions, 1080 events. 592/1080 cut-off events. For 2117/2117 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5027 event pairs, 114 based on Foata normal form. 2/928 useless extension candidates. Maximal degree in co-relation 3286. Up to 393 conditions per place. [2023-08-29 21:01:26,247 INFO L137 encePairwiseOnDemand]: 592/597 looper letters, 54 selfloop transitions, 34 changer transitions 0/94 dead transitions. [2023-08-29 21:01:26,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 910 flow [2023-08-29 21:01:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:01:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:01:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1461 transitions. [2023-08-29 21:01:26,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894472361809045 [2023-08-29 21:01:26,251 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1461 transitions. [2023-08-29 21:01:26,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1461 transitions. [2023-08-29 21:01:26,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:26,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1461 transitions. [2023-08-29 21:01:26,254 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) [2023-08-29 21:01:26,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 597.0) internal successors, (3582), 6 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:26,258 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 597.0) internal successors, (3582), 6 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:26,258 INFO L175 Difference]: Start difference. First operand has 57 places, 62 transitions, 597 flow. Second operand 5 states and 1461 transitions. [2023-08-29 21:01:26,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 910 flow [2023-08-29 21:01:26,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 872 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-08-29 21:01:26,265 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 673 flow [2023-08-29 21:01:26,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=673, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-08-29 21:01:26,265 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-29 21:01:26,266 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 673 flow [2023-08-29 21:01:26,266 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) [2023-08-29 21:01:26,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:26,266 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] [2023-08-29 21:01:26,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 21:01:26,267 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)] === [2023-08-29 21:01:26,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:26,267 INFO L85 PathProgramCache]: Analyzing trace with hash 722578960, now seen corresponding path program 1 times [2023-08-29 21:01:26,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:26,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408760983] [2023-08-29 21:01:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:26,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:26,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408760983] [2023-08-29 21:01:26,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408760983] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:01:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578538258] [2023-08-29 21:01:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:26,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:01:26,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:01:26,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:01:26,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:01:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 21:01:26,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:26,930 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 21:01:26,931 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 [2023-08-29 21:01:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:27,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:01:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:27,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578538258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:01:27,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:01:27,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-29 21:01:27,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500459826] [2023-08-29 21:01:27,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:01:27,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 21:01:27,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:27,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 21:01:27,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-29 21:01:28,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 597 [2023-08-29 21:01:28,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 673 flow. Second operand has 12 states, 12 states have (on average 280.6666666666667) internal successors, (3368), 12 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:28,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:28,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 597 [2023-08-29 21:01:28,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:29,403 INFO L130 PetriNetUnfolder]: 678/1221 cut-off events. [2023-08-29 21:01:29,403 INFO L131 PetriNetUnfolder]: For 2734/2736 co-relation queries the response was YES. [2023-08-29 21:01:29,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3851 conditions, 1221 events. 678/1221 cut-off events. For 2734/2736 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5252 event pairs, 188 based on Foata normal form. 1/1038 useless extension candidates. Maximal degree in co-relation 3834. Up to 717 conditions per place. [2023-08-29 21:01:29,409 INFO L137 encePairwiseOnDemand]: 591/597 looper letters, 65 selfloop transitions, 2 changer transitions 48/120 dead transitions. [2023-08-29 21:01:29,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 120 transitions, 1175 flow [2023-08-29 21:01:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:01:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:01:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2010 transitions. [2023-08-29 21:01:29,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809763101220388 [2023-08-29 21:01:29,415 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2010 transitions. [2023-08-29 21:01:29,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2010 transitions. [2023-08-29 21:01:29,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:29,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2010 transitions. [2023-08-29 21:01:29,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 287.14285714285717) internal successors, (2010), 7 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:29,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 597.0) internal successors, (4776), 8 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:29,424 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 597.0) internal successors, (4776), 8 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:29,424 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 673 flow. Second operand 7 states and 2010 transitions. [2023-08-29 21:01:29,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 120 transitions, 1175 flow [2023-08-29 21:01:29,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 1137 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-08-29 21:01:29,449 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 591 flow [2023-08-29 21:01:29,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=591, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-08-29 21:01:29,449 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-29 21:01:29,449 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 591 flow [2023-08-29 21:01:29,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 280.6666666666667) internal successors, (3368), 12 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:29,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:29,451 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] [2023-08-29 21:01:29,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:29,657 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,SelfDestructingSolverStorable23 [2023-08-29 21:01:29,658 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)] === [2023-08-29 21:01:29,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:29,658 INFO L85 PathProgramCache]: Analyzing trace with hash 263321070, now seen corresponding path program 2 times [2023-08-29 21:01:29,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:29,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865757217] [2023-08-29 21:01:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:29,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:01:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865757217] [2023-08-29 21:01:29,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865757217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:01:29,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593915284] [2023-08-29 21:01:29,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:01:29,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:01:29,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:01:29,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:01:30,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:01:30,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 21:01:30,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:01:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 21:01:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:01:30,212 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 21:01:30,212 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 [2023-08-29 21:01:30,241 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 21:01:30,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 34 [2023-08-29 21:01:30,310 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2023-08-29 21:01:30,310 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 2 case distinctions, treesize of input 24 treesize of output 47 [2023-08-29 21:01:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:01:30,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:01:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:01:30,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593915284] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:01:30,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:01:30,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-08-29 21:01:30,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532345003] [2023-08-29 21:01:30,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:01:30,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:01:30,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:01:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:01:31,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 597 [2023-08-29 21:01:31,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 591 flow. Second operand has 13 states, 13 states have (on average 280.3076923076923) internal successors, (3644), 13 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:31,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:31,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 597 [2023-08-29 21:01:31,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:32,570 INFO L130 PetriNetUnfolder]: 524/918 cut-off events. [2023-08-29 21:01:32,571 INFO L131 PetriNetUnfolder]: For 1826/1826 co-relation queries the response was YES. [2023-08-29 21:01:32,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2869 conditions, 918 events. 524/918 cut-off events. For 1826/1826 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3510 event pairs, 92 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 2848. Up to 236 conditions per place. [2023-08-29 21:01:32,575 INFO L137 encePairwiseOnDemand]: 591/597 looper letters, 0 selfloop transitions, 0 changer transitions 117/117 dead transitions. [2023-08-29 21:01:32,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 117 transitions, 1023 flow [2023-08-29 21:01:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 21:01:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 21:01:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2292 transitions. [2023-08-29 21:01:32,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798994974874372 [2023-08-29 21:01:32,581 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2292 transitions. [2023-08-29 21:01:32,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2292 transitions. [2023-08-29 21:01:32,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:32,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2292 transitions. [2023-08-29 21:01:32,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 286.5) internal successors, (2292), 8 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:32,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 597.0) internal successors, (5373), 9 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:32,594 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 597.0) internal successors, (5373), 9 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:32,594 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 591 flow. Second operand 8 states and 2292 transitions. [2023-08-29 21:01:32,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 117 transitions, 1023 flow [2023-08-29 21:01:32,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 989 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-29 21:01:32,601 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-08-29 21:01:32,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-08-29 21:01:32,602 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-08-29 21:01:32,602 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-08-29 21:01:32,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 280.3076923076923) internal successors, (3644), 13 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:32,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 28 remaining) [2023-08-29 21:01:32,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 28 remaining) [2023-08-29 21:01:32,606 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (25 of 28 remaining) [2023-08-29 21:01:32,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 28 remaining) [2023-08-29 21:01:32,608 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 28 remaining) [2023-08-29 21:01:32,608 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr6ASSERT_VIOLATIONMEMORY_LEAK (22 of 28 remaining) [2023-08-29 21:01:32,608 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr7ASSERT_VIOLATIONMEMORY_LEAK (21 of 28 remaining) [2023-08-29 21:01:32,608 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_ath9kErr0ASSERT_VIOLATIONMEMORY_LEAK (20 of 28 remaining) [2023-08-29 21:01:32,608 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 28 remaining) [2023-08-29 21:01:32,608 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 28 remaining) [2023-08-29 21:01:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 28 remaining) [2023-08-29 21:01:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr6ASSERT_VIOLATIONMEMORY_LEAK (16 of 28 remaining) [2023-08-29 21:01:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 28 remaining) [2023-08-29 21:01:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 28 remaining) [2023-08-29 21:01:32,609 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 28 remaining) [2023-08-29 21:01:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 28 remaining) [2023-08-29 21:01:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 28 remaining) [2023-08-29 21:01:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (10 of 28 remaining) [2023-08-29 21:01:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 28 remaining) [2023-08-29 21:01:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 28 remaining) [2023-08-29 21:01:32,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (7 of 28 remaining) [2023-08-29 21:01:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 28 remaining) [2023-08-29 21:01:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_ath9kErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 28 remaining) [2023-08-29 21:01:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 28 remaining) [2023-08-29 21:01:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 28 remaining) [2023-08-29 21:01:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 28 remaining) [2023-08-29 21:01:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr7ASSERT_VIOLATIONMEMORY_LEAK (1 of 28 remaining) [2023-08-29 21:01:32,611 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 28 remaining) [2023-08-29 21:01:32,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:01:32,818 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,SelfDestructingSolverStorable24 [2023-08-29 21:01:32,819 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] [2023-08-29 21:01:32,820 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 (1/2) [2023-08-29 21:01:32,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 324 transitions, 678 flow [2023-08-29 21:01:32,854 INFO L130 PetriNetUnfolder]: 33/339 cut-off events. [2023-08-29 21:01:32,855 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:01:32,856 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. [2023-08-29 21:01:32,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 324 transitions, 678 flow [2023-08-29 21:01:32,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 209 transitions, 435 flow [2023-08-29 21:01:32,858 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:01:32,858 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 209 transitions, 435 flow [2023-08-29 21:01:32,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 209 transitions, 435 flow [2023-08-29 21:01:32,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 209 transitions, 435 flow [2023-08-29 21:01:32,883 INFO L130 PetriNetUnfolder]: 31/310 cut-off events. [2023-08-29 21:01:32,883 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:01:32,885 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. [2023-08-29 21:01:32,890 INFO L119 LiptonReduction]: Number of co-enabled transitions 10620 [2023-08-29 21:01:38,365 INFO L134 LiptonReduction]: Checked pairs total: 16655 [2023-08-29 21:01:38,365 INFO L136 LiptonReduction]: Total number of compositions: 241 [2023-08-29 21:01:38,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:01:38,367 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;@30e5b0f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:01:38,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-29 21:01:38,373 INFO L130 PetriNetUnfolder]: 9/51 cut-off events. [2023-08-29 21:01:38,373 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:01:38,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:01:38,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:01:38,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread_usbThread1of1ForFork1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_usbThread1of1ForFork1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-29 21:01:38,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:01:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash 850849417, now seen corresponding path program 1 times [2023-08-29 21:01:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:01:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245341108] [2023-08-29 21:01:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:01:38,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:01:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:01:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:01:38,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:01:38,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245341108] [2023-08-29 21:01:38,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245341108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:01:38,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:01:38,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:01:38,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725270848] [2023-08-29 21:01:38,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:01:38,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:01:38,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:01:38,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:01:38,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:01:38,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 565 [2023-08-29 21:01:38,440 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) [2023-08-29 21:01:38,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:01:38,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 565 [2023-08-29 21:01:38,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:01:38,511 INFO L130 PetriNetUnfolder]: 205/404 cut-off events. [2023-08-29 21:01:38,511 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 21:01:38,512 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 39. Compared 1774 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. [2023-08-29 21:01:38,512 INFO L137 encePairwiseOnDemand]: 556/565 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-29 21:01:38,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 193 flow [2023-08-29 21:01:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:01:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:01:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 885 transitions. [2023-08-29 21:01:38,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221238938053098 [2023-08-29 21:01:38,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 885 transitions. [2023-08-29 21:01:38,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 885 transitions. [2023-08-29 21:01:38,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:01:38,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 885 transitions. [2023-08-29 21:01:38,517 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) [2023-08-29 21:01:38,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:38,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:01:38,520 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 107 flow. Second operand 3 states and 885 transitions. [2023-08-29 21:01:38,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 193 flow [2023-08-29 21:01:38,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 183 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:01:38,521 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-29 21:01:38,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, 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} [2023-08-29 21:01:38,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-08-29 21:01:38,522 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-29 21:01:38,522 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) [2023-08-29 21:01:38,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbThread1of1ForFork1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-29 21:01:38,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-29 21:01:38,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-29 21:01:38,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 21:01:38,523 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:01:38,524 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (2/2) [2023-08-29 21:01:38,525 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 21:01:38,525 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 21:01:38,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:01:38 BasicIcfg [2023-08-29 21:01:38,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 21:01:38,530 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 21:01:38,530 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 21:01:38,530 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 21:01:38,530 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:01:09" (3/4) ... [2023-08-29 21:01:38,533 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-29 21:01:38,538 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread_ath9k [2023-08-29 21:01:38,538 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread_usb [2023-08-29 21:01:38,542 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2023-08-29 21:01:38,542 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-08-29 21:01:38,543 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-29 21:01:38,543 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-29 21:01:38,576 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-29 21:01:38,576 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 21:01:38,577 INFO L158 Benchmark]: Toolchain (without parser) took 30954.36ms. Allocated memory was 69.2MB in the beginning and 832.6MB in the end (delta: 763.4MB). Free memory was 44.2MB in the beginning and 400.8MB in the end (delta: -356.6MB). Peak memory consumption was 410.5MB. Max. memory is 16.1GB. [2023-08-29 21:01:38,577 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory was 34.4MB in the beginning and 34.3MB in the end (delta: 48.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 21:01:38,577 INFO L158 Benchmark]: CACSL2BoogieTranslator took 859.56ms. Allocated memory is still 69.2MB. Free memory was 44.0MB in the beginning and 33.6MB in the end (delta: 10.4MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. [2023-08-29 21:01:38,577 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.30ms. Allocated memory is still 69.2MB. Free memory was 33.6MB in the beginning and 30.0MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-29 21:01:38,578 INFO L158 Benchmark]: Boogie Preprocessor took 77.80ms. Allocated memory is still 69.2MB. Free memory was 30.0MB in the beginning and 27.0MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:01:38,578 INFO L158 Benchmark]: RCFGBuilder took 619.98ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 27.0MB in the beginning and 54.7MB in the end (delta: -27.7MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2023-08-29 21:01:38,579 INFO L158 Benchmark]: TraceAbstraction took 29254.71ms. Allocated memory was 83.9MB in the beginning and 832.6MB in the end (delta: 748.7MB). Free memory was 53.8MB in the beginning and 404.0MB in the end (delta: -350.1MB). Peak memory consumption was 397.7MB. Max. memory is 16.1GB. [2023-08-29 21:01:38,579 INFO L158 Benchmark]: Witness Printer took 46.66ms. Allocated memory is still 832.6MB. Free memory was 404.0MB in the beginning and 400.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-29 21:01:38,584 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory was 34.4MB in the beginning and 34.3MB in the end (delta: 48.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 859.56ms. Allocated memory is still 69.2MB. Free memory was 44.0MB in the beginning and 33.6MB in the end (delta: 10.4MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.30ms. Allocated memory is still 69.2MB. Free memory was 33.6MB in the beginning and 30.0MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 77.80ms. Allocated memory is still 69.2MB. Free memory was 30.0MB in the beginning and 27.0MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 619.98ms. Allocated memory was 69.2MB in the beginning and 83.9MB in the end (delta: 14.7MB). Free memory was 27.0MB in the beginning and 54.7MB in the end (delta: -27.7MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * TraceAbstraction took 29254.71ms. Allocated memory was 83.9MB in the beginning and 832.6MB in the end (delta: 748.7MB). Free memory was 53.8MB in the beginning and 404.0MB in the end (delta: -350.1MB). Peak memory consumption was 397.7MB. Max. memory is 16.1GB. * Witness Printer took 46.66ms. Allocated memory is still 832.6MB. Free memory was 404.0MB in the beginning and 400.8MB 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: 7.0s, 210 PlacesBefore, 51 PlacesAfterwards, 227 TransitionsBefore, 54 TransitionsAfterwards, 10740 CoEnabledTransitionPairs, 8 FixpointIterations, 76 TrivialSequentialCompositions, 140 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 40 ConcurrentYvCompositions, 14 ChoiceCompositions, 273 TotalNumberOfCompositions, 17413 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12375, independent: 12094, independent conditional: 0, independent unconditional: 12094, dependent: 281, dependent conditional: 0, dependent unconditional: 281, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6138, independent: 6071, independent conditional: 0, independent unconditional: 6071, dependent: 67, dependent conditional: 0, dependent unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12375, independent: 6023, independent conditional: 0, independent unconditional: 6023, dependent: 214, dependent conditional: 0, dependent unconditional: 214, unknown: 6138, unknown conditional: 0, unknown unconditional: 6138] , Statistics on independence cache: Total cache size (in pairs): 265, Positive cache size: 245, Positive conditional cache size: 0, Positive unconditional cache size: 245, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.5s, 194 PlacesBefore, 43 PlacesAfterwards, 209 TransitionsBefore, 45 TransitionsAfterwards, 10620 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 141 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 39 ConcurrentYvCompositions, 13 ChoiceCompositions, 241 TotalNumberOfCompositions, 16655 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12268, independent: 12044, independent conditional: 0, independent unconditional: 12044, dependent: 224, dependent conditional: 0, dependent unconditional: 224, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6207, independent: 6139, independent conditional: 0, independent unconditional: 6139, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12268, independent: 5905, independent conditional: 0, independent unconditional: 5905, dependent: 156, dependent conditional: 0, dependent unconditional: 156, unknown: 6207, unknown conditional: 0, unknown unconditional: 6207] , Statistics on independence cache: Total cache size (in pairs): 251, Positive cache size: 233, Positive conditional cache size: 0, Positive unconditional cache size: 233, 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 - 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 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: 23.4s, OverallIterations: 25, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2948 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1832 mSDsluCounter, 291 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 131 mSDsCounter, 205 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6092 IncrementalHoareTripleChecker+Invalid, 6297 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 205 mSolverCounterUnsat, 160 mSDtfsCounter, 6092 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=673occurred in iteration=23, InterpolantAutomatonStates: 92, 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, 3.7s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 340 ConstructedInterpolants, 39 QuantifiedInterpolants, 3182 SizeOfPredicates, 0 NumberOfNonLiveVariables, 616 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 - 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: 5.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s 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, 0.0s SatisfiabilityAnalysisTime, 0.0s 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 - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-29 21:01:38,617 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