./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.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 a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 02:35:58,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:35:58,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:35:58,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:35:58,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:35:58,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:35:58,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:35:58,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:35:58,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:35:58,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:35:58,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:35:58,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:35:58,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:35:58,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:35:58,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:35:58,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:35:58,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:35:58,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:35:58,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:35:58,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:35:58,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:35:58,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:35:58,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:35:58,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:35:58,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:35:58,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:35:58,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:35:58,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:35:58,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:35:58,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:35:58,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:35:58,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:35:58,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:35:58,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:35:58,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:35:58,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:35:58,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:35:58,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:35:58,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:35:58,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:35:58,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:35:58,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:35:58,515 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:35:58,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:35:58,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:35:58,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:35:58,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:35:58,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:35:58,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:35:58,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:35:58,519 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:35:58,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:35:58,520 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:35:58,520 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:35:58,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:35:58,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:35:58,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:35:58,521 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:35:58,521 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:35:58,522 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:35:58,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:35:58,522 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:35:58,522 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:35:58,522 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:35:58,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:35:58,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:35:58,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:35:58,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:35:58,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:35:58,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:35:58,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:35:58,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:35:58,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:35:58,524 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:35:58,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:35:58,525 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:35:58,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:35:58,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:35:58,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:35:58,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:35:58,873 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:35:58,873 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:35:58,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-08-30 02:35:59,947 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:36:00,187 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:36:00,189 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-08-30 02:36:00,206 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abbd75ce4/d10380e994f742d59f457c09fc552d30/FLAGac9ae7a50 [2023-08-30 02:36:00,217 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abbd75ce4/d10380e994f742d59f457c09fc552d30 [2023-08-30 02:36:00,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:36:00,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:36:00,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:36:00,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:36:00,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:36:00,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6e3065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00, skipping insertion in model container [2023-08-30 02:36:00,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:36:00,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:36:00,503 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-08-30 02:36:00,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:36:00,519 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:36:00,573 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-08-30 02:36:00,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:36:00,605 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:36:00,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00 WrapperNode [2023-08-30 02:36:00,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:36:00,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:36:00,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:36:00,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:36:00,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,662 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 85 [2023-08-30 02:36:00,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:36:00,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:36:00,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:36:00,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:36:00,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:36:00,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:36:00,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:36:00,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:36:00,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (1/1) ... [2023-08-30 02:36:00,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:36:00,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:36:00,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 02:36:00,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 02:36:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:36:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 02:36:00,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 02:36:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:36:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:36:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:36:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:36:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:36:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:36:00,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:36:00,790 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 02:36:00,902 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:36:00,904 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:36:01,189 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:36:01,287 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:36:01,287 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:36:01,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:36:01 BoogieIcfgContainer [2023-08-30 02:36:01,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:36:01,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:36:01,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:36:01,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:36:01,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:36:00" (1/3) ... [2023-08-30 02:36:01,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30651018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:36:01, skipping insertion in model container [2023-08-30 02:36:01,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:36:00" (2/3) ... [2023-08-30 02:36:01,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30651018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:36:01, skipping insertion in model container [2023-08-30 02:36:01,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:36:01" (3/3) ... [2023-08-30 02:36:01,303 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-08-30 02:36:01,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:36:01,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 02:36:01,318 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:36:01,408 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:36:01,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 95 transitions, 195 flow [2023-08-30 02:36:01,510 INFO L130 PetriNetUnfolder]: 7/110 cut-off events. [2023-08-30 02:36:01,510 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:01,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 110 events. 7/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-30 02:36:01,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 95 transitions, 195 flow [2023-08-30 02:36:01,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 95 transitions, 195 flow [2023-08-30 02:36:01,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:36:01,543 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 95 transitions, 195 flow [2023-08-30 02:36:01,548 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 95 transitions, 195 flow [2023-08-30 02:36:01,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 95 transitions, 195 flow [2023-08-30 02:36:01,601 INFO L130 PetriNetUnfolder]: 7/110 cut-off events. [2023-08-30 02:36:01,601 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:01,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 110 events. 7/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-30 02:36:01,605 INFO L119 LiptonReduction]: Number of co-enabled transitions 2196 [2023-08-30 02:36:03,771 INFO L134 LiptonReduction]: Checked pairs total: 5898 [2023-08-30 02:36:03,772 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-30 02:36:03,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:36:03,798 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;@17714c79, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:36:03,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-08-30 02:36:03,800 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 02:36:03,801 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:03,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:03,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:03,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 02:36:03,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash 14975, now seen corresponding path program 1 times [2023-08-30 02:36:03,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:03,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518653205] [2023-08-30 02:36:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:03,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:04,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:04,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518653205] [2023-08-30 02:36:04,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518653205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:04,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:04,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:04,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894546114] [2023-08-30 02:36:04,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:04,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:04,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:04,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:04,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 188 [2023-08-30 02:36:04,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:04,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 188 [2023-08-30 02:36:04,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:04,337 INFO L130 PetriNetUnfolder]: 137/327 cut-off events. [2023-08-30 02:36:04,337 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:04,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 327 events. 137/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1381 event pairs, 66 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 617. Up to 166 conditions per place. [2023-08-30 02:36:04,340 INFO L137 encePairwiseOnDemand]: 177/188 looper letters, 45 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-30 02:36:04,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 53 transitions, 209 flow [2023-08-30 02:36:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-08-30 02:36:04,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49822695035460995 [2023-08-30 02:36:04,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-08-30 02:36:04,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-08-30 02:36:04,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:04,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-08-30 02:36:04,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,393 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 83 flow. Second operand 3 states and 281 transitions. [2023-08-30 02:36:04,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 53 transitions, 209 flow [2023-08-30 02:36:04,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 53 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:04,397 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 95 flow [2023-08-30 02:36:04,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-30 02:36:04,404 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2023-08-30 02:36:04,405 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 95 flow [2023-08-30 02:36:04,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:04,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:04,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:36:04,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 02:36:04,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash 14976, now seen corresponding path program 1 times [2023-08-30 02:36:04,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:04,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887545057] [2023-08-30 02:36:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:04,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:04,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887545057] [2023-08-30 02:36:04,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887545057] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:04,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:04,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:04,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850635064] [2023-08-30 02:36:04,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:04,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:04,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:04,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:04,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:04,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 188 [2023-08-30 02:36:04,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:04,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 188 [2023-08-30 02:36:04,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:04,583 INFO L130 PetriNetUnfolder]: 99/248 cut-off events. [2023-08-30 02:36:04,583 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-08-30 02:36:04,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 248 events. 99/248 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 992 event pairs, 71 based on Foata normal form. 37/215 useless extension candidates. Maximal degree in co-relation 552. Up to 224 conditions per place. [2023-08-30 02:36:04,586 INFO L137 encePairwiseOnDemand]: 186/188 looper letters, 25 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-30 02:36:04,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 145 flow [2023-08-30 02:36:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-30 02:36:04,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44858156028368795 [2023-08-30 02:36:04,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-30 02:36:04,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-30 02:36:04,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:04,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-30 02:36:04,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,592 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 95 flow. Second operand 3 states and 253 transitions. [2023-08-30 02:36:04,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 145 flow [2023-08-30 02:36:04,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:04,595 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 87 flow [2023-08-30 02:36:04,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-08-30 02:36:04,596 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2023-08-30 02:36:04,596 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 87 flow [2023-08-30 02:36:04,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:04,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:04,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 02:36:04,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:36:04,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-08-30 02:36:04,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:04,598 INFO L85 PathProgramCache]: Analyzing trace with hash 954649768, now seen corresponding path program 1 times [2023-08-30 02:36:04,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:04,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557072996] [2023-08-30 02:36:04,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:04,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:04,640 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:36:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:04,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:36:04,663 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:36:04,664 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2023-08-30 02:36:04,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 34 remaining) [2023-08-30 02:36:04,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2023-08-30 02:36:04,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2023-08-30 02:36:04,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2023-08-30 02:36:04,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 34 remaining) [2023-08-30 02:36:04,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2023-08-30 02:36:04,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2023-08-30 02:36:04,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2023-08-30 02:36:04,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (24 of 34 remaining) [2023-08-30 02:36:04,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2023-08-30 02:36:04,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2023-08-30 02:36:04,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (21 of 34 remaining) [2023-08-30 02:36:04,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (20 of 34 remaining) [2023-08-30 02:36:04,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2023-08-30 02:36:04,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 34 remaining) [2023-08-30 02:36:04,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2023-08-30 02:36:04,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2023-08-30 02:36:04,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (15 of 34 remaining) [2023-08-30 02:36:04,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2023-08-30 02:36:04,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2023-08-30 02:36:04,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2023-08-30 02:36:04,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2023-08-30 02:36:04,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 34 remaining) [2023-08-30 02:36:04,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2023-08-30 02:36:04,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2023-08-30 02:36:04,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2023-08-30 02:36:04,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 34 remaining) [2023-08-30 02:36:04,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2023-08-30 02:36:04,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2023-08-30 02:36:04,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 34 remaining) [2023-08-30 02:36:04,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 34 remaining) [2023-08-30 02:36:04,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 34 remaining) [2023-08-30 02:36:04,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 34 remaining) [2023-08-30 02:36:04,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:36:04,674 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 02:36:04,676 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:36:04,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 02:36:04,708 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:36:04,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 157 transitions, 326 flow [2023-08-30 02:36:04,731 INFO L130 PetriNetUnfolder]: 13/189 cut-off events. [2023-08-30 02:36:04,731 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:36:04,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 189 events. 13/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 580 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2023-08-30 02:36:04,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 157 transitions, 326 flow [2023-08-30 02:36:04,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 157 transitions, 326 flow [2023-08-30 02:36:04,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:36:04,737 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 157 transitions, 326 flow [2023-08-30 02:36:04,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 157 transitions, 326 flow [2023-08-30 02:36:04,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 157 transitions, 326 flow [2023-08-30 02:36:04,756 INFO L130 PetriNetUnfolder]: 13/189 cut-off events. [2023-08-30 02:36:04,756 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:36:04,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 189 events. 13/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 580 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2023-08-30 02:36:04,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 11956 [2023-08-30 02:36:06,578 INFO L134 LiptonReduction]: Checked pairs total: 44984 [2023-08-30 02:36:06,578 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-30 02:36:06,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:36:06,581 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;@17714c79, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:36:06,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-08-30 02:36:06,582 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 02:36:06,582 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:06,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:06,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:06,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-30 02:36:06,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash 25608, now seen corresponding path program 1 times [2023-08-30 02:36:06,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:06,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880253351] [2023-08-30 02:36:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:06,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:06,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:06,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880253351] [2023-08-30 02:36:06,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880253351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:06,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:06,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667777419] [2023-08-30 02:36:06,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:06,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:06,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 268 [2023-08-30 02:36:06,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:06,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:06,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 268 [2023-08-30 02:36:06,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:07,213 INFO L130 PetriNetUnfolder]: 2740/5166 cut-off events. [2023-08-30 02:36:07,213 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-30 02:36:07,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9598 conditions, 5166 events. 2740/5166 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 41577 event pairs, 2548 based on Foata normal form. 144/2937 useless extension candidates. Maximal degree in co-relation 6901. Up to 4340 conditions per place. [2023-08-30 02:36:07,250 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 48 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 02:36:07,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 258 flow [2023-08-30 02:36:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:07,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-30 02:36:07,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360696517412935 [2023-08-30 02:36:07,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-30 02:36:07,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-30 02:36:07,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:07,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-30 02:36:07,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,257 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 182 flow. Second operand 3 states and 431 transitions. [2023-08-30 02:36:07,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 258 flow [2023-08-30 02:36:07,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 74 transitions, 256 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:07,260 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 160 flow [2023-08-30 02:36:07,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-08-30 02:36:07,261 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -6 predicate places. [2023-08-30 02:36:07,261 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 160 flow [2023-08-30 02:36:07,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:07,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:07,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:36:07,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-30 02:36:07,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:07,263 INFO L85 PathProgramCache]: Analyzing trace with hash 25609, now seen corresponding path program 1 times [2023-08-30 02:36:07,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:07,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840269227] [2023-08-30 02:36:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:07,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:07,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840269227] [2023-08-30 02:36:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840269227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:07,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:07,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:07,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465120108] [2023-08-30 02:36:07,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:07,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:07,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:07,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 268 [2023-08-30 02:36:07,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:07,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:07,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 268 [2023-08-30 02:36:07,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:08,169 INFO L130 PetriNetUnfolder]: 4499/8422 cut-off events. [2023-08-30 02:36:08,170 INFO L131 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2023-08-30 02:36:08,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15971 conditions, 8422 events. 4499/8422 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 68692 event pairs, 1946 based on Foata normal form. 0/4936 useless extension candidates. Maximal degree in co-relation 15963. Up to 4183 conditions per place. [2023-08-30 02:36:08,237 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 94 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2023-08-30 02:36:08,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 459 flow [2023-08-30 02:36:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-30 02:36:08,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5758706467661692 [2023-08-30 02:36:08,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-30 02:36:08,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-30 02:36:08,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:08,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-30 02:36:08,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:08,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:08,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:08,244 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 160 flow. Second operand 3 states and 463 transitions. [2023-08-30 02:36:08,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 459 flow [2023-08-30 02:36:08,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:36:08,249 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 197 flow [2023-08-30 02:36:08,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2023-08-30 02:36:08,252 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2023-08-30 02:36:08,252 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 197 flow [2023-08-30 02:36:08,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:08,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:08,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:08,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:36:08,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-30 02:36:08,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -619705513, now seen corresponding path program 1 times [2023-08-30 02:36:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:08,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498665878] [2023-08-30 02:36:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:08,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:08,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:08,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498665878] [2023-08-30 02:36:08,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498665878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:08,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:08,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:36:08,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519367794] [2023-08-30 02:36:08,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:08,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:08,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:08,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:08,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 268 [2023-08-30 02:36:08,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:08,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:08,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 268 [2023-08-30 02:36:08,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:09,524 INFO L130 PetriNetUnfolder]: 6755/12581 cut-off events. [2023-08-30 02:36:09,525 INFO L131 PetriNetUnfolder]: For 4835/4835 co-relation queries the response was YES. [2023-08-30 02:36:09,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27849 conditions, 12581 events. 6755/12581 cut-off events. For 4835/4835 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 106461 event pairs, 1932 based on Foata normal form. 0/8287 useless extension candidates. Maximal degree in co-relation 27838. Up to 5534 conditions per place. [2023-08-30 02:36:09,621 INFO L137 encePairwiseOnDemand]: 250/268 looper letters, 88 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2023-08-30 02:36:09,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 124 transitions, 526 flow [2023-08-30 02:36:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-30 02:36:09,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554726368159204 [2023-08-30 02:36:09,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-30 02:36:09,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-30 02:36:09,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:09,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-30 02:36:09,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:09,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:09,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:09,629 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 197 flow. Second operand 3 states and 446 transitions. [2023-08-30 02:36:09,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 124 transitions, 526 flow [2023-08-30 02:36:09,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 508 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:09,636 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 327 flow [2023-08-30 02:36:09,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2023-08-30 02:36:09,637 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2023-08-30 02:36:09,638 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 327 flow [2023-08-30 02:36:09,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:09,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:09,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:09,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:36:09,639 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-30 02:36:09,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:09,639 INFO L85 PathProgramCache]: Analyzing trace with hash -619705512, now seen corresponding path program 1 times [2023-08-30 02:36:09,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:09,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197846680] [2023-08-30 02:36:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:09,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:09,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:09,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197846680] [2023-08-30 02:36:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197846680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:09,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:09,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:36:09,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671063871] [2023-08-30 02:36:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:09,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:09,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 268 [2023-08-30 02:36:09,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 327 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:09,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:09,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 268 [2023-08-30 02:36:09,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:10,644 INFO L130 PetriNetUnfolder]: 5188/9542 cut-off events. [2023-08-30 02:36:10,644 INFO L131 PetriNetUnfolder]: For 4864/5022 co-relation queries the response was YES. [2023-08-30 02:36:10,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24141 conditions, 9542 events. 5188/9542 cut-off events. For 4864/5022 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 74243 event pairs, 1833 based on Foata normal form. 1019/7295 useless extension candidates. Maximal degree in co-relation 24130. Up to 7436 conditions per place. [2023-08-30 02:36:10,720 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 79 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2023-08-30 02:36:10,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 540 flow [2023-08-30 02:36:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-30 02:36:10,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5485074626865671 [2023-08-30 02:36:10,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-30 02:36:10,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-30 02:36:10,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:10,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-30 02:36:10,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:10,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:10,727 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:10,727 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 327 flow. Second operand 3 states and 441 transitions. [2023-08-30 02:36:10,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 540 flow [2023-08-30 02:36:10,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 111 transitions, 510 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:10,746 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 291 flow [2023-08-30 02:36:10,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2023-08-30 02:36:10,747 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2023-08-30 02:36:10,747 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 291 flow [2023-08-30 02:36:10,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:10,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:10,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:36:10,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:36:10,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-30 02:36:10,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1463482302, now seen corresponding path program 1 times [2023-08-30 02:36:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:10,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871622307] [2023-08-30 02:36:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:10,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:10,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871622307] [2023-08-30 02:36:10,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871622307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:10,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:10,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:36:10,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361815181] [2023-08-30 02:36:10,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:10,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:36:10,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:36:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:36:10,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 268 [2023-08-30 02:36:10,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:10,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:10,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 268 [2023-08-30 02:36:10,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:11,713 INFO L130 PetriNetUnfolder]: 5720/10695 cut-off events. [2023-08-30 02:36:11,713 INFO L131 PetriNetUnfolder]: For 3629/3799 co-relation queries the response was YES. [2023-08-30 02:36:11,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25853 conditions, 10695 events. 5720/10695 cut-off events. For 3629/3799 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 84503 event pairs, 2736 based on Foata normal form. 4/6739 useless extension candidates. Maximal degree in co-relation 25842. Up to 8858 conditions per place. [2023-08-30 02:36:11,773 INFO L137 encePairwiseOnDemand]: 257/268 looper letters, 78 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2023-08-30 02:36:11,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 555 flow [2023-08-30 02:36:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:36:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:36:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 570 transitions. [2023-08-30 02:36:11,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317164179104478 [2023-08-30 02:36:11,776 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 570 transitions. [2023-08-30 02:36:11,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 570 transitions. [2023-08-30 02:36:11,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:11,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 570 transitions. [2023-08-30 02:36:11,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.5) internal successors, (570), 4 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:11,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:11,780 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:11,780 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 291 flow. Second operand 4 states and 570 transitions. [2023-08-30 02:36:11,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 555 flow [2023-08-30 02:36:11,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:36:11,787 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 352 flow [2023-08-30 02:36:11,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2023-08-30 02:36:11,789 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -4 predicate places. [2023-08-30 02:36:11,789 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 352 flow [2023-08-30 02:36:11,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:11,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:11,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 02:36:11,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:36:11,790 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-30 02:36:11,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:11,791 INFO L85 PathProgramCache]: Analyzing trace with hash -273617643, now seen corresponding path program 1 times [2023-08-30 02:36:11,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:11,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086138241] [2023-08-30 02:36:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:11,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:11,806 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:36:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:36:11,821 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:36:11,821 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:36:11,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2023-08-30 02:36:11,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-08-30 02:36:11,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-08-30 02:36:11,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-08-30 02:36:11,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2023-08-30 02:36:11,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 49 remaining) [2023-08-30 02:36:11,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-08-30 02:36:11,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-08-30 02:36:11,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-08-30 02:36:11,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (39 of 49 remaining) [2023-08-30 02:36:11,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-08-30 02:36:11,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-08-30 02:36:11,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (36 of 49 remaining) [2023-08-30 02:36:11,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (35 of 49 remaining) [2023-08-30 02:36:11,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-08-30 02:36:11,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2023-08-30 02:36:11,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-08-30 02:36:11,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-08-30 02:36:11,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (30 of 49 remaining) [2023-08-30 02:36:11,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-08-30 02:36:11,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-08-30 02:36:11,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-08-30 02:36:11,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-08-30 02:36:11,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-08-30 02:36:11,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-08-30 02:36:11,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-08-30 02:36:11,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-08-30 02:36:11,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 49 remaining) [2023-08-30 02:36:11,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-08-30 02:36:11,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-08-30 02:36:11,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 49 remaining) [2023-08-30 02:36:11,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (17 of 49 remaining) [2023-08-30 02:36:11,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-08-30 02:36:11,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-08-30 02:36:11,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2023-08-30 02:36:11,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-08-30 02:36:11,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-08-30 02:36:11,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-08-30 02:36:11,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-08-30 02:36:11,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-08-30 02:36:11,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-08-30 02:36:11,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-08-30 02:36:11,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 49 remaining) [2023-08-30 02:36:11,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-08-30 02:36:11,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-08-30 02:36:11,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 49 remaining) [2023-08-30 02:36:11,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 49 remaining) [2023-08-30 02:36:11,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-08-30 02:36:11,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 49 remaining) [2023-08-30 02:36:11,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:36:11,833 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-30 02:36:11,835 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 02:36:11,835 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 02:36:11,882 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 02:36:11,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 219 transitions, 459 flow [2023-08-30 02:36:11,931 INFO L130 PetriNetUnfolder]: 19/268 cut-off events. [2023-08-30 02:36:11,932 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:36:11,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 268 events. 19/268 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 997 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 200. Up to 8 conditions per place. [2023-08-30 02:36:11,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 219 transitions, 459 flow [2023-08-30 02:36:11,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 219 transitions, 459 flow [2023-08-30 02:36:11,941 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:36:11,941 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 219 transitions, 459 flow [2023-08-30 02:36:11,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 219 transitions, 459 flow [2023-08-30 02:36:11,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 219 transitions, 459 flow [2023-08-30 02:36:11,966 INFO L130 PetriNetUnfolder]: 19/268 cut-off events. [2023-08-30 02:36:11,966 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 02:36:11,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 268 events. 19/268 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 997 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 200. Up to 8 conditions per place. [2023-08-30 02:36:11,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 29280 [2023-08-30 02:36:14,273 INFO L134 LiptonReduction]: Checked pairs total: 108351 [2023-08-30 02:36:14,274 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-30 02:36:14,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:36:14,277 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;@17714c79, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:36:14,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-08-30 02:36:14,278 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 02:36:14,278 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:36:14,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:14,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:14,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-30 02:36:14,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash 39369, now seen corresponding path program 1 times [2023-08-30 02:36:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:14,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270599900] [2023-08-30 02:36:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:14,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270599900] [2023-08-30 02:36:14,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270599900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:14,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:14,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:14,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960895328] [2023-08-30 02:36:14,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:14,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:14,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:14,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:14,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:14,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 368 [2023-08-30 02:36:14,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 116 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:14,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:14,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 368 [2023-08-30 02:36:14,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:36:37,561 INFO L130 PetriNetUnfolder]: 249979/372682 cut-off events. [2023-08-30 02:36:37,561 INFO L131 PetriNetUnfolder]: For 12514/12514 co-relation queries the response was YES. [2023-08-30 02:36:38,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722585 conditions, 372682 events. 249979/372682 cut-off events. For 12514/12514 co-relation queries the response was YES. Maximal size of possible extension queue 14504. Compared 3608280 event pairs, 97151 based on Foata normal form. 0/199984 useless extension candidates. Maximal degree in co-relation 234072. Up to 199579 conditions per place. [2023-08-30 02:36:39,932 INFO L137 encePairwiseOnDemand]: 355/368 looper letters, 143 selfloop transitions, 8 changer transitions 0/183 dead transitions. [2023-08-30 02:36:39,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 183 transitions, 701 flow [2023-08-30 02:36:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:36:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:36:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2023-08-30 02:36:39,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2023-08-30 02:36:39,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2023-08-30 02:36:39,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2023-08-30 02:36:39,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:36:39,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2023-08-30 02:36:39,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:39,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:39,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:39,939 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 253 flow. Second operand 3 states and 667 transitions. [2023-08-30 02:36:39,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 183 transitions, 701 flow [2023-08-30 02:36:39,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 183 transitions, 693 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 02:36:39,962 INFO L231 Difference]: Finished difference. Result has 114 places, 116 transitions, 295 flow [2023-08-30 02:36:39,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=114, PETRI_TRANSITIONS=116} [2023-08-30 02:36:39,963 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -3 predicate places. [2023-08-30 02:36:39,963 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 116 transitions, 295 flow [2023-08-30 02:36:39,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:39,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:36:39,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 02:36:39,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:36:39,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-30 02:36:39,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:36:39,965 INFO L85 PathProgramCache]: Analyzing trace with hash 39367, now seen corresponding path program 1 times [2023-08-30 02:36:39,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:36:39,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686341688] [2023-08-30 02:36:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:36:39,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:36:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:36:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:36:39,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:36:39,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686341688] [2023-08-30 02:36:39,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686341688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:36:39,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:36:39,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:36:39,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586576367] [2023-08-30 02:36:39,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:36:39,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:36:39,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:36:39,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:36:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:36:40,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 368 [2023-08-30 02:36:40,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:36:40,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:36:40,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 368 [2023-08-30 02:36:40,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:37:08,613 INFO L130 PetriNetUnfolder]: 289442/451980 cut-off events. [2023-08-30 02:37:08,613 INFO L131 PetriNetUnfolder]: For 95864/95993 co-relation queries the response was YES. [2023-08-30 02:37:09,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954965 conditions, 451980 events. 289442/451980 cut-off events. For 95864/95993 co-relation queries the response was YES. Maximal size of possible extension queue 17615. Compared 4724924 event pairs, 194502 based on Foata normal form. 645/289263 useless extension candidates. Maximal degree in co-relation 952771. Up to 316805 conditions per place. [2023-08-30 02:37:11,737 INFO L137 encePairwiseOnDemand]: 362/368 looper letters, 155 selfloop transitions, 6 changer transitions 0/195 dead transitions. [2023-08-30 02:37:11,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 195 transitions, 823 flow [2023-08-30 02:37:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:37:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:37:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2023-08-30 02:37:11,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2023-08-30 02:37:11,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2023-08-30 02:37:11,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2023-08-30 02:37:11,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:37:11,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2023-08-30 02:37:11,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:11,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:11,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:11,746 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 295 flow. Second operand 3 states and 660 transitions. [2023-08-30 02:37:11,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 195 transitions, 823 flow [2023-08-30 02:37:32,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 195 transitions, 795 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:37:32,894 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 329 flow [2023-08-30 02:37:32,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2023-08-30 02:37:32,895 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -1 predicate places. [2023-08-30 02:37:32,895 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 329 flow [2023-08-30 02:37:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:32,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:37:32,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:37:32,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:37:32,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-30 02:37:32,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:37:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1505496327, now seen corresponding path program 1 times [2023-08-30 02:37:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:37:32,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879374838] [2023-08-30 02:37:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:37:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:37:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:37:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:37:32,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:37:32,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879374838] [2023-08-30 02:37:32,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879374838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:37:32,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:37:32,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:37:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135071146] [2023-08-30 02:37:32,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:37:32,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:37:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:37:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:37:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:37:32,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 368 [2023-08-30 02:37:32,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:37:32,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:37:32,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 368 [2023-08-30 02:37:32,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:38:33,309 INFO L130 PetriNetUnfolder]: 521253/790032 cut-off events. [2023-08-30 02:38:33,309 INFO L131 PetriNetUnfolder]: For 420161/420183 co-relation queries the response was YES. [2023-08-30 02:38:35,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1820348 conditions, 790032 events. 521253/790032 cut-off events. For 420161/420183 co-relation queries the response was YES. Maximal size of possible extension queue 29867. Compared 8375834 event pairs, 253343 based on Foata normal form. 12/495751 useless extension candidates. Maximal degree in co-relation 1787913. Up to 413569 conditions per place. [2023-08-30 02:38:39,249 INFO L137 encePairwiseOnDemand]: 347/368 looper letters, 150 selfloop transitions, 22 changer transitions 0/201 dead transitions. [2023-08-30 02:38:39,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 201 transitions, 903 flow [2023-08-30 02:38:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:38:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:38:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-30 02:38:39,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-08-30 02:38:39,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-30 02:38:39,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-30 02:38:39,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:38:39,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-30 02:38:39,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:38:39,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:38:39,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:38:39,255 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 329 flow. Second operand 3 states and 644 transitions. [2023-08-30 02:38:39,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 201 transitions, 903 flow [2023-08-30 02:39:02,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 201 transitions, 883 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:39:02,191 INFO L231 Difference]: Finished difference. Result has 118 places, 141 transitions, 521 flow [2023-08-30 02:39:02,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=521, PETRI_PLACES=118, PETRI_TRANSITIONS=141} [2023-08-30 02:39:02,192 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2023-08-30 02:39:02,192 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 141 transitions, 521 flow [2023-08-30 02:39:02,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:39:02,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:39:02,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:39:02,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:39:02,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-30 02:39:02,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:39:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1505496324, now seen corresponding path program 1 times [2023-08-30 02:39:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:39:02,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545586118] [2023-08-30 02:39:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:39:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:39:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:39:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:39:02,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:39:02,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545586118] [2023-08-30 02:39:02,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545586118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:39:02,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:39:02,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:39:02,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368164774] [2023-08-30 02:39:02,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:39:02,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:39:02,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:39:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:39:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:39:02,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 368 [2023-08-30 02:39:02,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 141 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:39:02,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:39:02,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 368 [2023-08-30 02:39:02,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:40:04,682 INFO L130 PetriNetUnfolder]: 498974/766984 cut-off events. [2023-08-30 02:40:04,682 INFO L131 PetriNetUnfolder]: For 525131/540147 co-relation queries the response was YES. [2023-08-30 02:40:07,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1902164 conditions, 766984 events. 498974/766984 cut-off events. For 525131/540147 co-relation queries the response was YES. Maximal size of possible extension queue 28824. Compared 8266603 event pairs, 298568 based on Foata normal form. 3954/530755 useless extension candidates. Maximal degree in co-relation 1563987. Up to 675761 conditions per place. [2023-08-30 02:40:10,867 INFO L137 encePairwiseOnDemand]: 359/368 looper letters, 119 selfloop transitions, 4 changer transitions 0/160 dead transitions. [2023-08-30 02:40:10,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 160 transitions, 847 flow [2023-08-30 02:40:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:40:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:40:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-30 02:40:10,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2023-08-30 02:40:10,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-30 02:40:10,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-30 02:40:10,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:40:10,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-30 02:40:10,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 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) [2023-08-30 02:40:10,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:40:10,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:40:10,874 INFO L175 Difference]: Start difference. First operand has 118 places, 141 transitions, 521 flow. Second operand 3 states and 627 transitions. [2023-08-30 02:40:10,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 160 transitions, 847 flow [2023-08-30 02:40:13,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 160 transitions, 799 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:40:13,407 INFO L231 Difference]: Finished difference. Result has 119 places, 144 transitions, 513 flow [2023-08-30 02:40:13,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=119, PETRI_TRANSITIONS=144} [2023-08-30 02:40:13,408 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 2 predicate places. [2023-08-30 02:40:13,408 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 144 transitions, 513 flow [2023-08-30 02:40:13,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:40:13,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:40:13,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:40:13,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:40:13,408 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-30 02:40:13,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:40:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1505496326, now seen corresponding path program 1 times [2023-08-30 02:40:13,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:40:13,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312816732] [2023-08-30 02:40:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:40:13,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:40:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:40:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:40:13,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:40:13,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312816732] [2023-08-30 02:40:13,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312816732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:40:13,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:40:13,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:40:13,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756630746] [2023-08-30 02:40:13,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:40:13,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:40:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:40:13,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:40:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:40:13,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 368 [2023-08-30 02:40:13,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 144 transitions, 513 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:40:13,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:40:13,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 368 [2023-08-30 02:40:13,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:41:05,845 INFO L130 PetriNetUnfolder]: 405822/618862 cut-off events. [2023-08-30 02:41:05,846 INFO L131 PetriNetUnfolder]: For 354502/368453 co-relation queries the response was YES. [2023-08-30 02:41:07,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561928 conditions, 618862 events. 405822/618862 cut-off events. For 354502/368453 co-relation queries the response was YES. Maximal size of possible extension queue 22903. Compared 6461508 event pairs, 246798 based on Foata normal form. 56168/487138 useless extension candidates. Maximal degree in co-relation 1527044. Up to 473987 conditions per place. [2023-08-30 02:41:11,002 INFO L137 encePairwiseOnDemand]: 359/368 looper letters, 153 selfloop transitions, 10 changer transitions 0/198 dead transitions. [2023-08-30 02:41:11,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 198 transitions, 1025 flow [2023-08-30 02:41:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:41:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:41:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-30 02:41:11,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806159420289855 [2023-08-30 02:41:11,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-30 02:41:11,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-30 02:41:11,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:41:11,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-30 02:41:11,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:41:11,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:41:11,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:41:11,008 INFO L175 Difference]: Start difference. First operand has 119 places, 144 transitions, 513 flow. Second operand 3 states and 641 transitions. [2023-08-30 02:41:11,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 198 transitions, 1025 flow [2023-08-30 02:41:11,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 198 transitions, 1019 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:41:11,034 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 515 flow [2023-08-30 02:41:11,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=515, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2023-08-30 02:41:11,034 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -3 predicate places. [2023-08-30 02:41:11,035 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 515 flow [2023-08-30 02:41:11,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:41:11,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:41:11,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:41:11,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:41:11,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-30 02:41:11,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:41:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash 574156032, now seen corresponding path program 1 times [2023-08-30 02:41:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:41:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274836250] [2023-08-30 02:41:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:41:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:41:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:41:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:41:11,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:41:11,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274836250] [2023-08-30 02:41:11,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274836250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:41:11,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:41:11,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:41:11,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361398666] [2023-08-30 02:41:11,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:41:11,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:41:11,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:41:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:41:11,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:41:11,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 368 [2023-08-30 02:41:11,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 515 flow. Second operand has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:41:11,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:41:11,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 368 [2023-08-30 02:41:11,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:41:57,434 INFO L130 PetriNetUnfolder]: 404429/619401 cut-off events. [2023-08-30 02:41:57,434 INFO L131 PetriNetUnfolder]: For 441223/454312 co-relation queries the response was YES. [2023-08-30 02:41:59,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600527 conditions, 619401 events. 404429/619401 cut-off events. For 441223/454312 co-relation queries the response was YES. Maximal size of possible extension queue 22169. Compared 6427805 event pairs, 99961 based on Foata normal form. 24412/457214 useless extension candidates. Maximal degree in co-relation 1339016. Up to 284044 conditions per place. [2023-08-30 02:42:03,357 INFO L137 encePairwiseOnDemand]: 356/368 looper letters, 239 selfloop transitions, 22 changer transitions 0/292 dead transitions. [2023-08-30 02:42:03,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 292 transitions, 1553 flow [2023-08-30 02:42:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:42:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:42:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 874 transitions. [2023-08-30 02:42:03,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2023-08-30 02:42:03,370 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 874 transitions. [2023-08-30 02:42:03,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 874 transitions. [2023-08-30 02:42:03,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:42:03,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 874 transitions. [2023-08-30 02:42:03,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 218.5) internal successors, (874), 4 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:42:03,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 368.0) internal successors, (1840), 5 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:42:03,386 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 368.0) internal successors, (1840), 5 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:42:03,386 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 515 flow. Second operand 4 states and 874 transitions. [2023-08-30 02:42:03,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 292 transitions, 1553 flow [2023-08-30 02:42:23,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 292 transitions, 1519 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:42:23,204 INFO L231 Difference]: Finished difference. Result has 117 places, 145 transitions, 625 flow [2023-08-30 02:42:23,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=625, PETRI_PLACES=117, PETRI_TRANSITIONS=145} [2023-08-30 02:42:23,204 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 0 predicate places. [2023-08-30 02:42:23,205 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 145 transitions, 625 flow [2023-08-30 02:42:23,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:42:23,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:42:23,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:42:23,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:42:23,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-30 02:42:23,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:42:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash 622046914, now seen corresponding path program 1 times [2023-08-30 02:42:23,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:42:23,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788306313] [2023-08-30 02:42:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:42:23,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:42:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:42:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:42:23,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:42:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788306313] [2023-08-30 02:42:23,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788306313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:42:23,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:42:23,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:42:23,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581954237] [2023-08-30 02:42:23,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:42:23,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:42:23,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:42:23,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:42:23,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:42:23,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 368 [2023-08-30 02:42:23,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 145 transitions, 625 flow. Second operand has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:42:23,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:42:23,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 368 [2023-08-30 02:42:23,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:43:15,081 INFO L130 PetriNetUnfolder]: 428293/656531 cut-off events. [2023-08-30 02:43:15,081 INFO L131 PetriNetUnfolder]: For 823833/837138 co-relation queries the response was YES. [2023-08-30 02:43:17,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812181 conditions, 656531 events. 428293/656531 cut-off events. For 823833/837138 co-relation queries the response was YES. Maximal size of possible extension queue 23573. Compared 6833989 event pairs, 230422 based on Foata normal form. 4074/460792 useless extension candidates. Maximal degree in co-relation 1592617. Up to 579955 conditions per place. [2023-08-30 02:43:22,183 INFO L137 encePairwiseOnDemand]: 359/368 looper letters, 143 selfloop transitions, 9 changer transitions 0/186 dead transitions. [2023-08-30 02:43:22,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 186 transitions, 1117 flow [2023-08-30 02:43:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:43:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:43:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 801 transitions. [2023-08-30 02:43:22,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441576086956522 [2023-08-30 02:43:22,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 801 transitions. [2023-08-30 02:43:22,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 801 transitions. [2023-08-30 02:43:22,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:43:22,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 801 transitions. [2023-08-30 02:43:22,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:43:22,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 368.0) internal successors, (1840), 5 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:43:22,199 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 368.0) internal successors, (1840), 5 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:43:22,199 INFO L175 Difference]: Start difference. First operand has 117 places, 145 transitions, 625 flow. Second operand 4 states and 801 transitions. [2023-08-30 02:43:22,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 186 transitions, 1117 flow [2023-08-30 02:43:22,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 186 transitions, 1100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:43:22,944 INFO L231 Difference]: Finished difference. Result has 120 places, 150 transitions, 678 flow [2023-08-30 02:43:22,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=678, PETRI_PLACES=120, PETRI_TRANSITIONS=150} [2023-08-30 02:43:22,945 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 3 predicate places. [2023-08-30 02:43:22,945 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 150 transitions, 678 flow [2023-08-30 02:43:22,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:43:22,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:43:22,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:43:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:43:22,946 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-30 02:43:22,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:43:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash -252409532, now seen corresponding path program 1 times [2023-08-30 02:43:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:43:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96054874] [2023-08-30 02:43:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:43:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:43:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:43:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:43:23,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:43:23,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96054874] [2023-08-30 02:43:23,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96054874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:43:23,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:43:23,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:43:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387107370] [2023-08-30 02:43:23,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:43:23,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:43:23,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:43:23,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:43:23,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:43:23,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 368 [2023-08-30 02:43:23,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 150 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:43:23,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:43:23,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 368 [2023-08-30 02:43:23,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:45:02,075 INFO L130 PetriNetUnfolder]: 702218/1056910 cut-off events. [2023-08-30 02:45:02,075 INFO L131 PetriNetUnfolder]: For 1481773/1507866 co-relation queries the response was YES. [2023-08-30 02:45:05,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972192 conditions, 1056910 events. 702218/1056910 cut-off events. For 1481773/1507866 co-relation queries the response was YES. Maximal size of possible extension queue 37544. Compared 11185403 event pairs, 248448 based on Foata normal form. 6572/797768 useless extension candidates. Maximal degree in co-relation 2574134. Up to 557603 conditions per place. [2023-08-30 02:45:11,159 INFO L137 encePairwiseOnDemand]: 347/368 looper letters, 192 selfloop transitions, 37 changer transitions 0/256 dead transitions. [2023-08-30 02:45:11,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 256 transitions, 1669 flow [2023-08-30 02:45:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:45:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:45:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-08-30 02:45:11,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769927536231884 [2023-08-30 02:45:11,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-08-30 02:45:11,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-08-30 02:45:11,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:45:11,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-08-30 02:45:11,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:45:11,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:45:11,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:45:11,164 INFO L175 Difference]: Start difference. First operand has 120 places, 150 transitions, 678 flow. Second operand 3 states and 637 transitions. [2023-08-30 02:45:11,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 256 transitions, 1669 flow [2023-08-30 02:45:11,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 256 transitions, 1642 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 02:45:11,259 INFO L231 Difference]: Finished difference. Result has 122 places, 183 transitions, 1101 flow [2023-08-30 02:45:11,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1101, PETRI_PLACES=122, PETRI_TRANSITIONS=183} [2023-08-30 02:45:11,260 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 5 predicate places. [2023-08-30 02:45:11,260 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 183 transitions, 1101 flow [2023-08-30 02:45:11,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:45:11,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:45:11,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:45:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:45:11,260 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-08-30 02:45:11,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:45:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash -252409531, now seen corresponding path program 1 times [2023-08-30 02:45:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:45:11,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127500275] [2023-08-30 02:45:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:45:11,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:45:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:45:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 02:45:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:45:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127500275] [2023-08-30 02:45:11,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127500275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:45:11,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:45:11,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:45:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85459465] [2023-08-30 02:45:11,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:45:11,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:45:11,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:45:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:45:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:45:11,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 368 [2023-08-30 02:45:11,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 183 transitions, 1101 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:45:11,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:45:11,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 368 [2023-08-30 02:45:11,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15