./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-barrier.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-barrier.wvr.c -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 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:23:25,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:23:25,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:23:25,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:23:25,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:23:25,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:23:25,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:23:25,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:23:25,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:23:25,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:23:25,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:23:25,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:23:25,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:23:25,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:23:25,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:23:25,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:23:25,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:23:25,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:23:25,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:23:25,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:23:25,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:23:25,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:23:25,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:23:25,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:23:25,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:23:25,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:23:25,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:23:25,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:23:25,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:23:25,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:23:25,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:23:25,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:23:25,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:23:25,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:23:25,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:23:25,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:23:25,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:23:25,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:23:25,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:23:25,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:23:25,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:23:25,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:23:25,501 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:23:25,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:23:25,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:23:25,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:23:25,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:23:25,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:23:25,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:23:25,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:23:25,504 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:23:25,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:23:25,504 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:23:25,505 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:23:25,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:23:25,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:23:25,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:23:25,505 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:23:25,506 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:23:25,506 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:23:25,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:23:25,506 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:23:25,507 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:23:25,507 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:23:25,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:23:25,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:23:25,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:23:25,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:23:25,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:23:25,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:23:25,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:23:25,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:23:25,509 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:23:25,509 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:23:25,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:23:25,510 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:23:25,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:23:25,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:23:25,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:23:25,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:23:25,846 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:23:25,847 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:23:25,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-barrier.wvr.c [2023-08-29 23:23:27,075 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:23:27,304 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:23:27,305 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier.wvr.c [2023-08-29 23:23:27,315 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b92ac6dab/84e393b71b234fbfbda8a89b36b22801/FLAG96b81f89f [2023-08-29 23:23:27,338 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b92ac6dab/84e393b71b234fbfbda8a89b36b22801 [2023-08-29 23:23:27,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:23:27,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:23:27,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:23:27,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:23:27,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:23:27,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17280091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27, skipping insertion in model container [2023-08-29 23:23:27,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:23:27,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:23:27,586 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier.wvr.c[4722,4735] [2023-08-29 23:23:27,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:23:27,602 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:23:27,649 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier.wvr.c[4722,4735] [2023-08-29 23:23:27,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:23:27,668 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:23:27,670 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:23:27,676 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:23:27,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27 WrapperNode [2023-08-29 23:23:27,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:23:27,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:23:27,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:23:27,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:23:27,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,741 INFO L138 Inliner]: procedures = 25, calls = 98, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 265 [2023-08-29 23:23:27,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:23:27,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:23:27,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:23:27,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:23:27,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,773 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:23:27,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:23:27,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:23:27,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:23:27,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (1/1) ... [2023-08-29 23:23:27,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:23:27,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:23:27,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:23:27,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:23:27,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:23:27,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:23:27,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:23:27,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:23:27,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:23:27,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:23:27,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:23:27,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:23:27,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:23:27,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:23:27,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 23:23:27,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 23:23:27,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:23:27,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-29 23:23:27,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-29 23:23:27,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-29 23:23:27,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-29 23:23:27,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:23:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:23:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:23:27,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:23:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:23:27,862 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:23:28,013 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:23:28,015 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:23:28,335 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:23:28,382 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:23:28,384 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-29 23:23:28,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:23:28 BoogieIcfgContainer [2023-08-29 23:23:28,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:23:28,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:23:28,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:23:28,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:23:28,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:23:27" (1/3) ... [2023-08-29 23:23:28,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32015aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:23:28, skipping insertion in model container [2023-08-29 23:23:28,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:27" (2/3) ... [2023-08-29 23:23:28,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32015aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:23:28, skipping insertion in model container [2023-08-29 23:23:28,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:23:28" (3/3) ... [2023-08-29 23:23:28,394 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2023-08-29 23:23:28,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:23:28,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-29 23:23:28,409 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:23:28,532 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-29 23:23:28,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 268 transitions, 608 flow [2023-08-29 23:23:28,661 INFO L130 PetriNetUnfolder]: 8/236 cut-off events. [2023-08-29 23:23:28,661 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:23:28,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 236 events. 8/236 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 357 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 201. Up to 3 conditions per place. [2023-08-29 23:23:28,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 268 transitions, 608 flow [2023-08-29 23:23:28,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 232 transitions, 512 flow [2023-08-29 23:23:28,684 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:23:28,692 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 232 transitions, 512 flow [2023-08-29 23:23:28,698 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 232 transitions, 512 flow [2023-08-29 23:23:28,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 232 transitions, 512 flow [2023-08-29 23:23:28,781 INFO L130 PetriNetUnfolder]: 8/232 cut-off events. [2023-08-29 23:23:28,782 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:23:28,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 232 events. 8/232 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 359 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 201. Up to 3 conditions per place. [2023-08-29 23:23:28,793 INFO L119 LiptonReduction]: Number of co-enabled transitions 10420 [2023-08-29 23:23:33,543 INFO L134 LiptonReduction]: Checked pairs total: 74898 [2023-08-29 23:23:33,543 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-29 23:23:33,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:23:33,561 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;@6702eb0d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:23:33,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-08-29 23:23:33,563 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 23:23:33,563 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:23:33,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:33,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:23:33,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:33,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash 887, now seen corresponding path program 1 times [2023-08-29 23:23:33,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:33,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873448487] [2023-08-29 23:23:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:33,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:33,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:33,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873448487] [2023-08-29 23:23:33,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873448487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:33,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:33,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:23:33,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602916497] [2023-08-29 23:23:33,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:33,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:23:33,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:23:33,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:23:33,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 434 [2023-08-29 23:23:33,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 103 transitions, 254 flow. Second operand has 2 states, 2 states have (on average 239.5) internal successors, (479), 2 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:33,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:33,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 434 [2023-08-29 23:23:33,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:39,444 INFO L130 PetriNetUnfolder]: 39355/58012 cut-off events. [2023-08-29 23:23:39,445 INFO L131 PetriNetUnfolder]: For 5246/5246 co-relation queries the response was YES. [2023-08-29 23:23:39,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115140 conditions, 58012 events. 39355/58012 cut-off events. For 5246/5246 co-relation queries the response was YES. Maximal size of possible extension queue 2106. Compared 443859 event pairs, 37683 based on Foata normal form. 206/35833 useless extension candidates. Maximal degree in co-relation 113798. Up to 50275 conditions per place. [2023-08-29 23:23:40,189 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 50 selfloop transitions, 0 changer transitions 0/98 dead transitions. [2023-08-29 23:23:40,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 98 transitions, 344 flow [2023-08-29 23:23:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:23:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:23:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 533 transitions. [2023-08-29 23:23:40,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140552995391705 [2023-08-29 23:23:40,208 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 533 transitions. [2023-08-29 23:23:40,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 533 transitions. [2023-08-29 23:23:40,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:40,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 533 transitions. [2023-08-29 23:23:40,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 266.5) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:40,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 434.0) internal successors, (1302), 3 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:40,226 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 434.0) internal successors, (1302), 3 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:40,227 INFO L175 Difference]: Start difference. First operand has 116 places, 103 transitions, 254 flow. Second operand 2 states and 533 transitions. [2023-08-29 23:23:40,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 98 transitions, 344 flow [2023-08-29 23:23:40,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-29 23:23:40,443 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 212 flow [2023-08-29 23:23:40,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=212, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2023-08-29 23:23:40,448 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -14 predicate places. [2023-08-29 23:23:40,449 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 212 flow [2023-08-29 23:23:40,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 239.5) internal successors, (479), 2 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:40,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:40,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:23:40,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:23:40,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:40,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:40,451 INFO L85 PathProgramCache]: Analyzing trace with hash 840606292, now seen corresponding path program 1 times [2023-08-29 23:23:40,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:40,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110868848] [2023-08-29 23:23:40,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:40,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:40,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:40,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110868848] [2023-08-29 23:23:40,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110868848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:40,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:40,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:23:40,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652417093] [2023-08-29 23:23:40,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:40,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:23:40,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:23:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:23:40,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 434 [2023-08-29 23:23:40,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:40,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:40,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 434 [2023-08-29 23:23:40,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:44,807 INFO L130 PetriNetUnfolder]: 40594/60151 cut-off events. [2023-08-29 23:23:44,807 INFO L131 PetriNetUnfolder]: For 964/964 co-relation queries the response was YES. [2023-08-29 23:23:44,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113988 conditions, 60151 events. 40594/60151 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 2124. Compared 464599 event pairs, 36209 based on Foata normal form. 0/36999 useless extension candidates. Maximal degree in co-relation 113985. Up to 48379 conditions per place. [2023-08-29 23:23:45,214 INFO L137 encePairwiseOnDemand]: 425/434 looper letters, 93 selfloop transitions, 7 changer transitions 0/146 dead transitions. [2023-08-29 23:23:45,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 146 transitions, 523 flow [2023-08-29 23:23:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:23:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:23:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 768 transitions. [2023-08-29 23:23:45,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898617511520737 [2023-08-29 23:23:45,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 768 transitions. [2023-08-29 23:23:45,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 768 transitions. [2023-08-29 23:23:45,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:45,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 768 transitions. [2023-08-29 23:23:45,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:45,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:45,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:45,224 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 212 flow. Second operand 3 states and 768 transitions. [2023-08-29 23:23:45,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 146 transitions, 523 flow [2023-08-29 23:23:45,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 146 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:23:45,231 INFO L231 Difference]: Finished difference. Result has 106 places, 104 transitions, 268 flow [2023-08-29 23:23:45,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=106, PETRI_TRANSITIONS=104} [2023-08-29 23:23:45,232 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2023-08-29 23:23:45,232 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 104 transitions, 268 flow [2023-08-29 23:23:45,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:45,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:45,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:23:45,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:23:45,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:45,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:45,235 INFO L85 PathProgramCache]: Analyzing trace with hash 840606293, now seen corresponding path program 1 times [2023-08-29 23:23:45,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:45,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178782040] [2023-08-29 23:23:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:45,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:45,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:45,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178782040] [2023-08-29 23:23:45,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178782040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:45,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:45,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:23:45,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118899192] [2023-08-29 23:23:45,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:45,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:23:45,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:45,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:23:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:23:45,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 434 [2023-08-29 23:23:45,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 104 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:45,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:45,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 434 [2023-08-29 23:23:45,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:49,308 INFO L130 PetriNetUnfolder]: 40296/59709 cut-off events. [2023-08-29 23:23:49,309 INFO L131 PetriNetUnfolder]: For 2845/2853 co-relation queries the response was YES. [2023-08-29 23:23:49,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114948 conditions, 59709 events. 40296/59709 cut-off events. For 2845/2853 co-relation queries the response was YES. Maximal size of possible extension queue 2122. Compared 460701 event pairs, 38328 based on Foata normal form. 152/36912 useless extension candidates. Maximal degree in co-relation 114943. Up to 51611 conditions per place. [2023-08-29 23:23:49,674 INFO L137 encePairwiseOnDemand]: 431/434 looper letters, 53 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-08-29 23:23:49,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 372 flow [2023-08-29 23:23:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:23:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:23:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2023-08-29 23:23:49,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783410138248848 [2023-08-29 23:23:49,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2023-08-29 23:23:49,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2023-08-29 23:23:49,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:49,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2023-08-29 23:23:49,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:49,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:49,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:49,683 INFO L175 Difference]: Start difference. First operand has 106 places, 104 transitions, 268 flow. Second operand 3 states and 753 transitions. [2023-08-29 23:23:49,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 372 flow [2023-08-29 23:23:49,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:23:49,694 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 252 flow [2023-08-29 23:23:49,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2023-08-29 23:23:49,695 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -12 predicate places. [2023-08-29 23:23:49,698 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 252 flow [2023-08-29 23:23:49,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:49,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:49,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:49,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:23:49,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:49,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash 368815539, now seen corresponding path program 1 times [2023-08-29 23:23:49,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:49,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319057793] [2023-08-29 23:23:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:49,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:49,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:49,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319057793] [2023-08-29 23:23:49,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319057793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:49,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:49,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:23:49,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526277066] [2023-08-29 23:23:49,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:49,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:23:49,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:23:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:23:49,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 434 [2023-08-29 23:23:49,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 252 flow. Second operand has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:49,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:49,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 434 [2023-08-29 23:23:49,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:52,805 INFO L130 PetriNetUnfolder]: 31144/46627 cut-off events. [2023-08-29 23:23:52,805 INFO L131 PetriNetUnfolder]: For 1553/1553 co-relation queries the response was YES. [2023-08-29 23:23:52,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89812 conditions, 46627 events. 31144/46627 cut-off events. For 1553/1553 co-relation queries the response was YES. Maximal size of possible extension queue 1609. Compared 355506 event pairs, 27331 based on Foata normal form. 0/30008 useless extension candidates. Maximal degree in co-relation 89807. Up to 36137 conditions per place. [2023-08-29 23:23:53,118 INFO L137 encePairwiseOnDemand]: 427/434 looper letters, 95 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2023-08-29 23:23:53,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 593 flow [2023-08-29 23:23:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:23:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:23:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-29 23:23:53,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775729646697388 [2023-08-29 23:23:53,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-29 23:23:53,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-29 23:23:53,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:53,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-29 23:23:53,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 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) [2023-08-29 23:23:53,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:53,129 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:53,129 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 252 flow. Second operand 3 states and 752 transitions. [2023-08-29 23:23:53,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 593 flow [2023-08-29 23:23:53,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 592 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:23:53,139 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 339 flow [2023-08-29 23:23:53,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2023-08-29 23:23:53,141 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -9 predicate places. [2023-08-29 23:23:53,141 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 339 flow [2023-08-29 23:23:53,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.5) internal successors, (878), 4 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:53,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:53,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:53,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:23:53,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:53,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash 368815538, now seen corresponding path program 1 times [2023-08-29 23:23:53,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:53,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791574054] [2023-08-29 23:23:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:53,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:53,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791574054] [2023-08-29 23:23:53,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791574054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:53,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:53,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:23:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310815038] [2023-08-29 23:23:53,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:53,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:23:53,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:53,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:23:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:23:53,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 434 [2023-08-29 23:23:53,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:53,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:53,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 434 [2023-08-29 23:23:53,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:55,560 INFO L130 PetriNetUnfolder]: 20447/30939 cut-off events. [2023-08-29 23:23:55,560 INFO L131 PetriNetUnfolder]: For 5225/5233 co-relation queries the response was YES. [2023-08-29 23:23:55,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64417 conditions, 30939 events. 20447/30939 cut-off events. For 5225/5233 co-relation queries the response was YES. Maximal size of possible extension queue 1075. Compared 228700 event pairs, 19207 based on Foata normal form. 2750/24462 useless extension candidates. Maximal degree in co-relation 64411. Up to 26919 conditions per place. [2023-08-29 23:23:55,783 INFO L137 encePairwiseOnDemand]: 432/434 looper letters, 60 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-08-29 23:23:55,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 459 flow [2023-08-29 23:23:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:23:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:23:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-08-29 23:23:55,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768049155145929 [2023-08-29 23:23:55,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-08-29 23:23:55,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-08-29 23:23:55,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:55,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-08-29 23:23:55,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:55,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:55,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:55,792 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 339 flow. Second operand 3 states and 751 transitions. [2023-08-29 23:23:55,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 459 flow [2023-08-29 23:23:55,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 109 transitions, 439 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:23:55,808 INFO L231 Difference]: Finished difference. Result has 106 places, 109 transitions, 319 flow [2023-08-29 23:23:55,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=106, PETRI_TRANSITIONS=109} [2023-08-29 23:23:55,810 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2023-08-29 23:23:55,811 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 109 transitions, 319 flow [2023-08-29 23:23:55,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:55,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:55,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:55,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:23:55,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:55,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash 158365259, now seen corresponding path program 1 times [2023-08-29 23:23:55,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:55,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43343709] [2023-08-29 23:23:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:55,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:55,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:55,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43343709] [2023-08-29 23:23:55,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43343709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:55,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:55,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:23:55,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103155212] [2023-08-29 23:23:55,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:55,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:23:55,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:55,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:23:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:23:56,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 434 [2023-08-29 23:23:56,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 109 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 222.5) internal successors, (890), 4 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:56,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:56,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 434 [2023-08-29 23:23:56,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:57,882 INFO L130 PetriNetUnfolder]: 14391/24168 cut-off events. [2023-08-29 23:23:57,882 INFO L131 PetriNetUnfolder]: For 4204/4204 co-relation queries the response was YES. [2023-08-29 23:23:57,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48918 conditions, 24168 events. 14391/24168 cut-off events. For 4204/4204 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 192704 event pairs, 11742 based on Foata normal form. 0/17716 useless extension candidates. Maximal degree in co-relation 48912. Up to 14735 conditions per place. [2023-08-29 23:23:57,995 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 118 selfloop transitions, 13 changer transitions 0/175 dead transitions. [2023-08-29 23:23:57,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 175 transitions, 787 flow [2023-08-29 23:23:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:23:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:23:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1001 transitions. [2023-08-29 23:23:57,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5766129032258065 [2023-08-29 23:23:57,998 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1001 transitions. [2023-08-29 23:23:57,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1001 transitions. [2023-08-29 23:23:57,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:57,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1001 transitions. [2023-08-29 23:23:58,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.25) internal successors, (1001), 4 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:58,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:58,004 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:58,004 INFO L175 Difference]: Start difference. First operand has 106 places, 109 transitions, 319 flow. Second operand 4 states and 1001 transitions. [2023-08-29 23:23:58,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 175 transitions, 787 flow [2023-08-29 23:23:58,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 786 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:23:58,008 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 413 flow [2023-08-29 23:23:58,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=413, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2023-08-29 23:23:58,009 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -8 predicate places. [2023-08-29 23:23:58,009 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 413 flow [2023-08-29 23:23:58,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.5) internal successors, (890), 4 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:58,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:58,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:58,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:23:58,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:58,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash 653618012, now seen corresponding path program 1 times [2023-08-29 23:23:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:58,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329918260] [2023-08-29 23:23:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:58,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:58,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:58,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329918260] [2023-08-29 23:23:58,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329918260] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:58,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:58,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:23:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083523110] [2023-08-29 23:23:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:58,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:23:58,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:23:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:23:58,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 434 [2023-08-29 23:23:58,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 413 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:58,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:58,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 434 [2023-08-29 23:23:58,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:59,646 INFO L130 PetriNetUnfolder]: 13079/22193 cut-off events. [2023-08-29 23:23:59,646 INFO L131 PetriNetUnfolder]: For 8967/8979 co-relation queries the response was YES. [2023-08-29 23:23:59,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48703 conditions, 22193 events. 13079/22193 cut-off events. For 8967/8979 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 177801 event pairs, 4080 based on Foata normal form. 0/16953 useless extension candidates. Maximal degree in co-relation 48695. Up to 13497 conditions per place. [2023-08-29 23:23:59,927 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 103 selfloop transitions, 13 changer transitions 0/161 dead transitions. [2023-08-29 23:23:59,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 161 transitions, 820 flow [2023-08-29 23:23:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:23:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:23:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-08-29 23:23:59,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837173579109063 [2023-08-29 23:23:59,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-08-29 23:23:59,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-08-29 23:23:59,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:59,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-08-29 23:23:59,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:59,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:59,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:59,933 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 413 flow. Second operand 3 states and 760 transitions. [2023-08-29 23:23:59,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 161 transitions, 820 flow [2023-08-29 23:23:59,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 161 transitions, 811 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:23:59,937 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 558 flow [2023-08-29 23:23:59,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=558, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2023-08-29 23:23:59,937 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -5 predicate places. [2023-08-29 23:23:59,937 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 558 flow [2023-08-29 23:23:59,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:59,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:59,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:59,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 23:23:59,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:59,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:59,938 INFO L85 PathProgramCache]: Analyzing trace with hash 653618013, now seen corresponding path program 1 times [2023-08-29 23:23:59,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:59,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007381948] [2023-08-29 23:23:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:59,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:00,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:00,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007381948] [2023-08-29 23:24:00,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007381948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:00,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:00,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:24:00,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737301722] [2023-08-29 23:24:00,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:00,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:24:00,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:24:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:24:00,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 434 [2023-08-29 23:24:00,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 558 flow. Second operand has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:00,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:00,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 434 [2023-08-29 23:24:00,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:01,485 INFO L130 PetriNetUnfolder]: 10228/18402 cut-off events. [2023-08-29 23:24:01,486 INFO L131 PetriNetUnfolder]: For 12107/12123 co-relation queries the response was YES. [2023-08-29 23:24:01,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41990 conditions, 18402 events. 10228/18402 cut-off events. For 12107/12123 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 151123 event pairs, 2634 based on Foata normal form. 994/15940 useless extension candidates. Maximal degree in co-relation 41981. Up to 10254 conditions per place. [2023-08-29 23:24:01,580 INFO L137 encePairwiseOnDemand]: 425/434 looper letters, 123 selfloop transitions, 19 changer transitions 0/186 dead transitions. [2023-08-29 23:24:01,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 186 transitions, 1058 flow [2023-08-29 23:24:01,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:24:01,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:24:01,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 998 transitions. [2023-08-29 23:24:01,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748847926267281 [2023-08-29 23:24:01,582 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 998 transitions. [2023-08-29 23:24:01,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 998 transitions. [2023-08-29 23:24:01,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:01,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 998 transitions. [2023-08-29 23:24:01,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 249.5) internal successors, (998), 4 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:01,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:01,588 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:01,588 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 558 flow. Second operand 4 states and 998 transitions. [2023-08-29 23:24:01,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 186 transitions, 1058 flow [2023-08-29 23:24:01,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 186 transitions, 1032 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:01,600 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 566 flow [2023-08-29 23:24:01,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=566, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2023-08-29 23:24:01,601 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-08-29 23:24:01,601 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 566 flow [2023-08-29 23:24:01,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:01,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:01,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:01,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 23:24:01,602 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:01,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:01,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1434929811, now seen corresponding path program 1 times [2023-08-29 23:24:01,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:01,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967320576] [2023-08-29 23:24:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:01,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:01,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:01,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967320576] [2023-08-29 23:24:01,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967320576] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:01,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:01,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:24:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831617144] [2023-08-29 23:24:01,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:01,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:01,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:01,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 434 [2023-08-29 23:24:01,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 566 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:01,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:01,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 434 [2023-08-29 23:24:01,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:03,103 INFO L130 PetriNetUnfolder]: 12048/21014 cut-off events. [2023-08-29 23:24:03,104 INFO L131 PetriNetUnfolder]: For 16571/16601 co-relation queries the response was YES. [2023-08-29 23:24:03,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49382 conditions, 21014 events. 12048/21014 cut-off events. For 16571/16601 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 170426 event pairs, 9054 based on Foata normal form. 0/17325 useless extension candidates. Maximal degree in co-relation 49373. Up to 10977 conditions per place. [2023-08-29 23:24:03,197 INFO L137 encePairwiseOnDemand]: 425/434 looper letters, 106 selfloop transitions, 15 changer transitions 0/165 dead transitions. [2023-08-29 23:24:03,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 979 flow [2023-08-29 23:24:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 758 transitions. [2023-08-29 23:24:03,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821812596006144 [2023-08-29 23:24:03,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 758 transitions. [2023-08-29 23:24:03,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 758 transitions. [2023-08-29 23:24:03,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:03,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 758 transitions. [2023-08-29 23:24:03,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:03,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:03,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:03,204 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 566 flow. Second operand 3 states and 758 transitions. [2023-08-29 23:24:03,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 979 flow [2023-08-29 23:24:03,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 954 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:03,228 INFO L231 Difference]: Finished difference. Result has 112 places, 132 transitions, 701 flow [2023-08-29 23:24:03,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=701, PETRI_PLACES=112, PETRI_TRANSITIONS=132} [2023-08-29 23:24:03,229 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -4 predicate places. [2023-08-29 23:24:03,229 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 132 transitions, 701 flow [2023-08-29 23:24:03,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:03,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:03,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:03,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 23:24:03,230 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:03,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:03,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1434929812, now seen corresponding path program 1 times [2023-08-29 23:24:03,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:03,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877942149] [2023-08-29 23:24:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:03,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:03,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:03,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877942149] [2023-08-29 23:24:03,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877942149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:03,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:03,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:24:03,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884668111] [2023-08-29 23:24:03,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:03,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:03,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:03,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:03,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 434 [2023-08-29 23:24:03,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 132 transitions, 701 flow. Second operand has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:03,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:03,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 434 [2023-08-29 23:24:03,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:04,809 INFO L130 PetriNetUnfolder]: 10682/18786 cut-off events. [2023-08-29 23:24:04,810 INFO L131 PetriNetUnfolder]: For 19657/19807 co-relation queries the response was YES. [2023-08-29 23:24:04,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45939 conditions, 18786 events. 10682/18786 cut-off events. For 19657/19807 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 151442 event pairs, 8533 based on Foata normal form. 528/15894 useless extension candidates. Maximal degree in co-relation 45929. Up to 12016 conditions per place. [2023-08-29 23:24:04,912 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 103 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2023-08-29 23:24:04,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 161 transitions, 1087 flow [2023-08-29 23:24:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2023-08-29 23:24:04,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944700460829493 [2023-08-29 23:24:04,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2023-08-29 23:24:04,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2023-08-29 23:24:04,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:04,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2023-08-29 23:24:04,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:04,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:04,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:04,919 INFO L175 Difference]: Start difference. First operand has 112 places, 132 transitions, 701 flow. Second operand 3 states and 774 transitions. [2023-08-29 23:24:04,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 161 transitions, 1087 flow [2023-08-29 23:24:04,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1057 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:04,935 INFO L231 Difference]: Finished difference. Result has 110 places, 130 transitions, 687 flow [2023-08-29 23:24:04,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=687, PETRI_PLACES=110, PETRI_TRANSITIONS=130} [2023-08-29 23:24:04,936 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-08-29 23:24:04,936 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 130 transitions, 687 flow [2023-08-29 23:24:04,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:04,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:04,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:04,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 23:24:04,937 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:04,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1903633977, now seen corresponding path program 1 times [2023-08-29 23:24:04,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:04,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442016249] [2023-08-29 23:24:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:04,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:04,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442016249] [2023-08-29 23:24:04,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442016249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:04,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:04,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:24:04,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008443137] [2023-08-29 23:24:04,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:04,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:04,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:05,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 434 [2023-08-29 23:24:05,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 130 transitions, 687 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:05,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:05,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 434 [2023-08-29 23:24:05,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:06,297 INFO L130 PetriNetUnfolder]: 10686/18645 cut-off events. [2023-08-29 23:24:06,297 INFO L131 PetriNetUnfolder]: For 18978/19110 co-relation queries the response was YES. [2023-08-29 23:24:06,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45589 conditions, 18645 events. 10686/18645 cut-off events. For 18978/19110 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 149037 event pairs, 3760 based on Foata normal form. 594/16163 useless extension candidates. Maximal degree in co-relation 45579. Up to 12782 conditions per place. [2023-08-29 23:24:06,382 INFO L137 encePairwiseOnDemand]: 430/434 looper letters, 108 selfloop transitions, 11 changer transitions 0/165 dead transitions. [2023-08-29 23:24:06,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 165 transitions, 1159 flow [2023-08-29 23:24:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2023-08-29 23:24:06,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960061443932412 [2023-08-29 23:24:06,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2023-08-29 23:24:06,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2023-08-29 23:24:06,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:06,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2023-08-29 23:24:06,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:06,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:06,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:06,389 INFO L175 Difference]: Start difference. First operand has 110 places, 130 transitions, 687 flow. Second operand 3 states and 776 transitions. [2023-08-29 23:24:06,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 165 transitions, 1159 flow [2023-08-29 23:24:06,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1123 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:06,402 INFO L231 Difference]: Finished difference. Result has 108 places, 128 transitions, 685 flow [2023-08-29 23:24:06,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=685, PETRI_PLACES=108, PETRI_TRANSITIONS=128} [2023-08-29 23:24:06,402 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -8 predicate places. [2023-08-29 23:24:06,403 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 128 transitions, 685 flow [2023-08-29 23:24:06,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:06,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:06,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:06,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 23:24:06,404 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:06,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1903633978, now seen corresponding path program 1 times [2023-08-29 23:24:06,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:06,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797544745] [2023-08-29 23:24:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:06,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:06,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797544745] [2023-08-29 23:24:06,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797544745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:06,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:06,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:24:06,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819694549] [2023-08-29 23:24:06,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:06,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:24:06,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:24:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:24:06,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 434 [2023-08-29 23:24:06,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 128 transitions, 685 flow. Second operand has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:06,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:06,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 434 [2023-08-29 23:24:06,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:08,171 INFO L130 PetriNetUnfolder]: 13710/22386 cut-off events. [2023-08-29 23:24:08,172 INFO L131 PetriNetUnfolder]: For 24894/25056 co-relation queries the response was YES. [2023-08-29 23:24:08,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56689 conditions, 22386 events. 13710/22386 cut-off events. For 24894/25056 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 172646 event pairs, 4479 based on Foata normal form. 0/19066 useless extension candidates. Maximal degree in co-relation 56679. Up to 12622 conditions per place. [2023-08-29 23:24:08,277 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 115 selfloop transitions, 20 changer transitions 0/177 dead transitions. [2023-08-29 23:24:08,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 177 transitions, 1180 flow [2023-08-29 23:24:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:24:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:24:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-08-29 23:24:08,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837173579109063 [2023-08-29 23:24:08,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-08-29 23:24:08,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-08-29 23:24:08,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:08,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-08-29 23:24:08,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:08,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:08,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:08,282 INFO L175 Difference]: Start difference. First operand has 108 places, 128 transitions, 685 flow. Second operand 3 states and 760 transitions. [2023-08-29 23:24:08,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 177 transitions, 1180 flow [2023-08-29 23:24:08,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 177 transitions, 1158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:08,290 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 890 flow [2023-08-29 23:24:08,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=890, PETRI_PLACES=110, PETRI_TRANSITIONS=141} [2023-08-29 23:24:08,291 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-08-29 23:24:08,291 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 890 flow [2023-08-29 23:24:08,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:08,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:08,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:08,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 23:24:08,292 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:08,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash -945684417, now seen corresponding path program 1 times [2023-08-29 23:24:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:08,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164144345] [2023-08-29 23:24:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:08,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:08,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164144345] [2023-08-29 23:24:08,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164144345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:08,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:08,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:24:08,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116154658] [2023-08-29 23:24:08,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:08,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:24:08,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:08,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:24:08,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:24:08,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 434 [2023-08-29 23:24:08,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 141 transitions, 890 flow. Second operand has 4 states, 4 states have (on average 222.5) internal successors, (890), 4 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:08,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:08,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 434 [2023-08-29 23:24:08,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:10,362 INFO L130 PetriNetUnfolder]: 12263/20716 cut-off events. [2023-08-29 23:24:10,362 INFO L131 PetriNetUnfolder]: For 27952/28208 co-relation queries the response was YES. [2023-08-29 23:24:10,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54212 conditions, 20716 events. 12263/20716 cut-off events. For 27952/28208 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 163999 event pairs, 3461 based on Foata normal form. 4/17879 useless extension candidates. Maximal degree in co-relation 54201. Up to 9843 conditions per place. [2023-08-29 23:24:10,499 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 134 selfloop transitions, 36 changer transitions 0/213 dead transitions. [2023-08-29 23:24:10,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 213 transitions, 1542 flow [2023-08-29 23:24:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:24:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:24:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 988 transitions. [2023-08-29 23:24:10,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691244239631337 [2023-08-29 23:24:10,502 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 988 transitions. [2023-08-29 23:24:10,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 988 transitions. [2023-08-29 23:24:10,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:10,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 988 transitions. [2023-08-29 23:24:10,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 247.0) internal successors, (988), 4 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:10,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:10,508 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:10,508 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 890 flow. Second operand 4 states and 988 transitions. [2023-08-29 23:24:10,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 213 transitions, 1542 flow [2023-08-29 23:24:10,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 213 transitions, 1486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:10,520 INFO L231 Difference]: Finished difference. Result has 114 places, 153 transitions, 1134 flow [2023-08-29 23:24:10,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1134, PETRI_PLACES=114, PETRI_TRANSITIONS=153} [2023-08-29 23:24:10,521 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -2 predicate places. [2023-08-29 23:24:10,521 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 153 transitions, 1134 flow [2023-08-29 23:24:10,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.5) internal successors, (890), 4 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:10,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:10,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:10,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 23:24:10,522 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:10,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:10,522 INFO L85 PathProgramCache]: Analyzing trace with hash -293255352, now seen corresponding path program 1 times [2023-08-29 23:24:10,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:10,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762684718] [2023-08-29 23:24:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:10,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:10,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:10,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762684718] [2023-08-29 23:24:10,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762684718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:10,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:10,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:24:10,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393968476] [2023-08-29 23:24:10,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:10,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:24:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:24:10,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:24:10,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 434 [2023-08-29 23:24:10,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 153 transitions, 1134 flow. Second operand has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:10,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:10,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 434 [2023-08-29 23:24:10,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:11,938 INFO L130 PetriNetUnfolder]: 11362/18840 cut-off events. [2023-08-29 23:24:11,938 INFO L131 PetriNetUnfolder]: For 34235/34483 co-relation queries the response was YES. [2023-08-29 23:24:12,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51721 conditions, 18840 events. 11362/18840 cut-off events. For 34235/34483 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 142516 event pairs, 7421 based on Foata normal form. 297/16692 useless extension candidates. Maximal degree in co-relation 51708. Up to 14157 conditions per place. [2023-08-29 23:24:12,067 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 157 selfloop transitions, 4 changer transitions 0/210 dead transitions. [2023-08-29 23:24:12,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 210 transitions, 1788 flow [2023-08-29 23:24:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:24:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:24:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1030 transitions. [2023-08-29 23:24:12,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933179723502304 [2023-08-29 23:24:12,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1030 transitions. [2023-08-29 23:24:12,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1030 transitions. [2023-08-29 23:24:12,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:12,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1030 transitions. [2023-08-29 23:24:12,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:12,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:12,074 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:12,074 INFO L175 Difference]: Start difference. First operand has 114 places, 153 transitions, 1134 flow. Second operand 4 states and 1030 transitions. [2023-08-29 23:24:12,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 210 transitions, 1788 flow [2023-08-29 23:24:12,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 210 transitions, 1782 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 23:24:12,107 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1140 flow [2023-08-29 23:24:12,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1140, PETRI_PLACES=118, PETRI_TRANSITIONS=153} [2023-08-29 23:24:12,108 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 2 predicate places. [2023-08-29 23:24:12,108 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1140 flow [2023-08-29 23:24:12,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:12,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:12,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:12,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 23:24:12,109 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:12,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash 74643931, now seen corresponding path program 1 times [2023-08-29 23:24:12,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:12,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119735718] [2023-08-29 23:24:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:12,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:12,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:12,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119735718] [2023-08-29 23:24:12,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119735718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:12,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:12,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:24:12,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560621645] [2023-08-29 23:24:12,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:12,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:24:12,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:12,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:24:12,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:12,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 434 [2023-08-29 23:24:12,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 153 transitions, 1140 flow. Second operand has 6 states, 6 states have (on average 217.16666666666666) internal successors, (1303), 6 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:12,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:12,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 434 [2023-08-29 23:24:12,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:13,820 INFO L130 PetriNetUnfolder]: 10745/17736 cut-off events. [2023-08-29 23:24:13,821 INFO L131 PetriNetUnfolder]: For 34188/34404 co-relation queries the response was YES. [2023-08-29 23:24:13,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50052 conditions, 17736 events. 10745/17736 cut-off events. For 34188/34404 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 132397 event pairs, 3795 based on Foata normal form. 239/15679 useless extension candidates. Maximal degree in co-relation 50037. Up to 8528 conditions per place. [2023-08-29 23:24:13,935 INFO L137 encePairwiseOnDemand]: 424/434 looper letters, 129 selfloop transitions, 43 changer transitions 0/213 dead transitions. [2023-08-29 23:24:13,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 213 transitions, 1672 flow [2023-08-29 23:24:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:24:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:24:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1188 transitions. [2023-08-29 23:24:13,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474654377880185 [2023-08-29 23:24:13,939 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1188 transitions. [2023-08-29 23:24:13,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1188 transitions. [2023-08-29 23:24:13,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:13,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1188 transitions. [2023-08-29 23:24:13,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.6) internal successors, (1188), 5 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:13,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 434.0) internal successors, (2604), 6 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:13,945 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 434.0) internal successors, (2604), 6 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:13,945 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1140 flow. Second operand 5 states and 1188 transitions. [2023-08-29 23:24:13,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 213 transitions, 1672 flow [2023-08-29 23:24:13,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 213 transitions, 1658 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 23:24:13,968 INFO L231 Difference]: Finished difference. Result has 121 places, 155 transitions, 1297 flow [2023-08-29 23:24:13,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1297, PETRI_PLACES=121, PETRI_TRANSITIONS=155} [2023-08-29 23:24:13,968 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 5 predicate places. [2023-08-29 23:24:13,969 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 155 transitions, 1297 flow [2023-08-29 23:24:13,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 217.16666666666666) internal successors, (1303), 6 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:13,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:13,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:13,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 23:24:13,970 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:13,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash -836730111, now seen corresponding path program 1 times [2023-08-29 23:24:13,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:13,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260034278] [2023-08-29 23:24:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:13,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:14,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260034278] [2023-08-29 23:24:14,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260034278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:14,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:14,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:24:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2337005] [2023-08-29 23:24:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:14,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:24:14,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:14,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:24:14,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:14,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 434 [2023-08-29 23:24:14,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 155 transitions, 1297 flow. Second operand has 6 states, 6 states have (on average 217.33333333333334) internal successors, (1304), 6 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:14,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:14,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 434 [2023-08-29 23:24:14,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:15,922 INFO L130 PetriNetUnfolder]: 10269/17039 cut-off events. [2023-08-29 23:24:15,922 INFO L131 PetriNetUnfolder]: For 40911/41045 co-relation queries the response was YES. [2023-08-29 23:24:15,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48274 conditions, 17039 events. 10269/17039 cut-off events. For 40911/41045 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 128779 event pairs, 2337 based on Foata normal form. 40/15125 useless extension candidates. Maximal degree in co-relation 48257. Up to 8243 conditions per place. [2023-08-29 23:24:16,038 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 167 selfloop transitions, 54 changer transitions 2/269 dead transitions. [2023-08-29 23:24:16,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 269 transitions, 2199 flow [2023-08-29 23:24:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:24:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:24:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1449 transitions. [2023-08-29 23:24:16,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2023-08-29 23:24:16,042 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1449 transitions. [2023-08-29 23:24:16,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1449 transitions. [2023-08-29 23:24:16,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:16,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1449 transitions. [2023-08-29 23:24:16,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 241.5) internal successors, (1449), 6 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:16,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:16,048 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:16,048 INFO L175 Difference]: Start difference. First operand has 121 places, 155 transitions, 1297 flow. Second operand 6 states and 1449 transitions. [2023-08-29 23:24:16,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 269 transitions, 2199 flow [2023-08-29 23:24:16,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 269 transitions, 2160 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:16,090 INFO L231 Difference]: Finished difference. Result has 129 places, 169 transitions, 1626 flow [2023-08-29 23:24:16,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1626, PETRI_PLACES=129, PETRI_TRANSITIONS=169} [2023-08-29 23:24:16,091 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 13 predicate places. [2023-08-29 23:24:16,091 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 169 transitions, 1626 flow [2023-08-29 23:24:16,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 217.33333333333334) internal successors, (1304), 6 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:16,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:16,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:16,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 23:24:16,092 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:16,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash -150664238, now seen corresponding path program 1 times [2023-08-29 23:24:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:16,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118784928] [2023-08-29 23:24:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:16,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:16,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:16,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118784928] [2023-08-29 23:24:16,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118784928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:16,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:16,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:24:16,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148685901] [2023-08-29 23:24:16,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:16,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:24:16,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:24:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:24:16,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 434 [2023-08-29 23:24:16,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 169 transitions, 1626 flow. Second operand has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:16,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:16,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 434 [2023-08-29 23:24:16,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:17,923 INFO L130 PetriNetUnfolder]: 10412/17849 cut-off events. [2023-08-29 23:24:17,923 INFO L131 PetriNetUnfolder]: For 52071/52296 co-relation queries the response was YES. [2023-08-29 23:24:17,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53064 conditions, 17849 events. 10412/17849 cut-off events. For 52071/52296 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 140425 event pairs, 2464 based on Foata normal form. 240/16360 useless extension candidates. Maximal degree in co-relation 53043. Up to 7917 conditions per place. [2023-08-29 23:24:18,021 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 186 selfloop transitions, 65 changer transitions 1/301 dead transitions. [2023-08-29 23:24:18,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 301 transitions, 2908 flow [2023-08-29 23:24:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:24:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:24:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1450 transitions. [2023-08-29 23:24:18,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568356374807988 [2023-08-29 23:24:18,024 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1450 transitions. [2023-08-29 23:24:18,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1450 transitions. [2023-08-29 23:24:18,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:18,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1450 transitions. [2023-08-29 23:24:18,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 241.66666666666666) internal successors, (1450), 6 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:18,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:18,030 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:18,030 INFO L175 Difference]: Start difference. First operand has 129 places, 169 transitions, 1626 flow. Second operand 6 states and 1450 transitions. [2023-08-29 23:24:18,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 301 transitions, 2908 flow [2023-08-29 23:24:18,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 301 transitions, 2863 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:18,101 INFO L231 Difference]: Finished difference. Result has 137 places, 197 transitions, 2284 flow [2023-08-29 23:24:18,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2284, PETRI_PLACES=137, PETRI_TRANSITIONS=197} [2023-08-29 23:24:18,102 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 21 predicate places. [2023-08-29 23:24:18,102 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 197 transitions, 2284 flow [2023-08-29 23:24:18,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:18,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:18,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:18,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 23:24:18,103 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:18,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1772113238, now seen corresponding path program 1 times [2023-08-29 23:24:18,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:18,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509912160] [2023-08-29 23:24:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:18,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:18,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509912160] [2023-08-29 23:24:18,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509912160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:18,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:18,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 23:24:18,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733298359] [2023-08-29 23:24:18,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:18,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:24:18,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:24:18,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:24:18,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 434 [2023-08-29 23:24:18,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 197 transitions, 2284 flow. Second operand has 8 states, 8 states have (on average 212.625) internal successors, (1701), 8 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:18,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:18,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 434 [2023-08-29 23:24:18,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:20,294 INFO L130 PetriNetUnfolder]: 10258/17476 cut-off events. [2023-08-29 23:24:20,294 INFO L131 PetriNetUnfolder]: For 63357/63505 co-relation queries the response was YES. [2023-08-29 23:24:20,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55910 conditions, 17476 events. 10258/17476 cut-off events. For 63357/63505 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 135634 event pairs, 7254 based on Foata normal form. 168/15815 useless extension candidates. Maximal degree in co-relation 55885. Up to 8174 conditions per place. [2023-08-29 23:24:20,395 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 159 selfloop transitions, 85 changer transitions 1/292 dead transitions. [2023-08-29 23:24:20,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 292 transitions, 3206 flow [2023-08-29 23:24:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:24:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:24:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1835 transitions. [2023-08-29 23:24:20,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285138248847926 [2023-08-29 23:24:20,398 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1835 transitions. [2023-08-29 23:24:20,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1835 transitions. [2023-08-29 23:24:20,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:20,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1835 transitions. [2023-08-29 23:24:20,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 229.375) internal successors, (1835), 8 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:20,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 434.0) internal successors, (3906), 9 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:20,404 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 434.0) internal successors, (3906), 9 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:20,404 INFO L175 Difference]: Start difference. First operand has 137 places, 197 transitions, 2284 flow. Second operand 8 states and 1835 transitions. [2023-08-29 23:24:20,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 292 transitions, 3206 flow [2023-08-29 23:24:20,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 292 transitions, 3198 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-29 23:24:20,497 INFO L231 Difference]: Finished difference. Result has 148 places, 209 transitions, 2764 flow [2023-08-29 23:24:20,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2764, PETRI_PLACES=148, PETRI_TRANSITIONS=209} [2023-08-29 23:24:20,498 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 32 predicate places. [2023-08-29 23:24:20,498 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 2764 flow [2023-08-29 23:24:20,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 212.625) internal successors, (1701), 8 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:20,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:20,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:20,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 23:24:20,499 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:20,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash -375622696, now seen corresponding path program 1 times [2023-08-29 23:24:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:20,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302593200] [2023-08-29 23:24:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:20,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:20,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302593200] [2023-08-29 23:24:20,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302593200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:20,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:20,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:24:20,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699529684] [2023-08-29 23:24:20,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:20,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:24:20,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:20,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:24:20,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:24:20,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 434 [2023-08-29 23:24:20,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 209 transitions, 2764 flow. Second operand has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:20,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:20,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 434 [2023-08-29 23:24:20,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:22,955 INFO L130 PetriNetUnfolder]: 10575/18352 cut-off events. [2023-08-29 23:24:22,955 INFO L131 PetriNetUnfolder]: For 89448/89649 co-relation queries the response was YES. [2023-08-29 23:24:23,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60748 conditions, 18352 events. 10575/18352 cut-off events. For 89448/89649 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 146572 event pairs, 2729 based on Foata normal form. 216/16922 useless extension candidates. Maximal degree in co-relation 60719. Up to 7791 conditions per place. [2023-08-29 23:24:23,053 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 191 selfloop transitions, 94 changer transitions 5/340 dead transitions. [2023-08-29 23:24:23,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 340 transitions, 4112 flow [2023-08-29 23:24:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:24:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:24:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2069 transitions. [2023-08-29 23:24:23,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296979006656426 [2023-08-29 23:24:23,056 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2069 transitions. [2023-08-29 23:24:23,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2069 transitions. [2023-08-29 23:24:23,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:23,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2069 transitions. [2023-08-29 23:24:23,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 229.88888888888889) internal successors, (2069), 9 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:23,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:23,064 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:23,064 INFO L175 Difference]: Start difference. First operand has 148 places, 209 transitions, 2764 flow. Second operand 9 states and 2069 transitions. [2023-08-29 23:24:23,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 340 transitions, 4112 flow [2023-08-29 23:24:23,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 340 transitions, 4029 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:23,230 INFO L231 Difference]: Finished difference. Result has 157 places, 226 transitions, 3362 flow [2023-08-29 23:24:23,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3362, PETRI_PLACES=157, PETRI_TRANSITIONS=226} [2023-08-29 23:24:23,231 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 41 predicate places. [2023-08-29 23:24:23,231 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 226 transitions, 3362 flow [2023-08-29 23:24:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:23,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:23,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:23,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 23:24:23,231 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:23,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash -986500360, now seen corresponding path program 1 times [2023-08-29 23:24:23,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:23,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171994766] [2023-08-29 23:24:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:23,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:23,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:23,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171994766] [2023-08-29 23:24:23,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171994766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:23,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:23,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:24:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133346249] [2023-08-29 23:24:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:23,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:24:23,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:24:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:24:23,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 434 [2023-08-29 23:24:23,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 226 transitions, 3362 flow. Second operand has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:23,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:23,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 434 [2023-08-29 23:24:23,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:25,415 INFO L130 PetriNetUnfolder]: 10700/18863 cut-off events. [2023-08-29 23:24:25,415 INFO L131 PetriNetUnfolder]: For 108850/108960 co-relation queries the response was YES. [2023-08-29 23:24:25,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63779 conditions, 18863 events. 10700/18863 cut-off events. For 108850/108960 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 151553 event pairs, 3069 based on Foata normal form. 126/17258 useless extension candidates. Maximal degree in co-relation 63747. Up to 7344 conditions per place. [2023-08-29 23:24:25,514 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 187 selfloop transitions, 93 changer transitions 0/324 dead transitions. [2023-08-29 23:24:25,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 324 transitions, 4473 flow [2023-08-29 23:24:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:24:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:24:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1450 transitions. [2023-08-29 23:24:25,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568356374807988 [2023-08-29 23:24:25,516 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1450 transitions. [2023-08-29 23:24:25,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1450 transitions. [2023-08-29 23:24:25,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:25,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1450 transitions. [2023-08-29 23:24:25,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 241.66666666666666) internal successors, (1450), 6 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:25,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:25,520 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:25,520 INFO L175 Difference]: Start difference. First operand has 157 places, 226 transitions, 3362 flow. Second operand 6 states and 1450 transitions. [2023-08-29 23:24:25,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 324 transitions, 4473 flow [2023-08-29 23:24:25,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 324 transitions, 4404 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-29 23:24:25,657 INFO L231 Difference]: Finished difference. Result has 162 places, 238 transitions, 3866 flow [2023-08-29 23:24:25,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=3133, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3866, PETRI_PLACES=162, PETRI_TRANSITIONS=238} [2023-08-29 23:24:25,658 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 46 predicate places. [2023-08-29 23:24:25,658 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 238 transitions, 3866 flow [2023-08-29 23:24:25,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:25,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:25,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:25,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 23:24:25,659 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:25,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:25,659 INFO L85 PathProgramCache]: Analyzing trace with hash 598141091, now seen corresponding path program 1 times [2023-08-29 23:24:25,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:25,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089902001] [2023-08-29 23:24:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:25,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:25,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:25,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089902001] [2023-08-29 23:24:25,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089902001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:25,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:25,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 23:24:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874025294] [2023-08-29 23:24:25,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:25,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:24:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:24:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:24:26,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-29 23:24:26,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 238 transitions, 3866 flow. Second operand has 7 states, 7 states have (on average 214.71428571428572) internal successors, (1503), 7 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:26,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:26,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-29 23:24:26,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:29,470 INFO L130 PetriNetUnfolder]: 19499/32604 cut-off events. [2023-08-29 23:24:29,470 INFO L131 PetriNetUnfolder]: For 203362/203510 co-relation queries the response was YES. [2023-08-29 23:24:29,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111220 conditions, 32604 events. 19499/32604 cut-off events. For 203362/203510 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 268038 event pairs, 8491 based on Foata normal form. 171/29790 useless extension candidates. Maximal degree in co-relation 111185. Up to 8046 conditions per place. [2023-08-29 23:24:29,857 INFO L137 encePairwiseOnDemand]: 417/434 looper letters, 282 selfloop transitions, 129 changer transitions 0/447 dead transitions. [2023-08-29 23:24:29,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 447 transitions, 6579 flow [2023-08-29 23:24:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:24:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:24:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2123 transitions. [2023-08-29 23:24:29,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435227854582694 [2023-08-29 23:24:29,860 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2123 transitions. [2023-08-29 23:24:29,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2123 transitions. [2023-08-29 23:24:29,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:29,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2123 transitions. [2023-08-29 23:24:29,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 235.88888888888889) internal successors, (2123), 9 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:29,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:29,866 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:29,866 INFO L175 Difference]: Start difference. First operand has 162 places, 238 transitions, 3866 flow. Second operand 9 states and 2123 transitions. [2023-08-29 23:24:29,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 447 transitions, 6579 flow [2023-08-29 23:24:30,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 447 transitions, 6501 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-08-29 23:24:30,934 INFO L231 Difference]: Finished difference. Result has 175 places, 295 transitions, 5706 flow [2023-08-29 23:24:30,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5706, PETRI_PLACES=175, PETRI_TRANSITIONS=295} [2023-08-29 23:24:30,935 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 59 predicate places. [2023-08-29 23:24:30,935 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 295 transitions, 5706 flow [2023-08-29 23:24:30,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 214.71428571428572) internal successors, (1503), 7 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:30,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:30,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:30,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 23:24:30,936 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:30,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:30,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1645307768, now seen corresponding path program 1 times [2023-08-29 23:24:30,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:30,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245744284] [2023-08-29 23:24:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:30,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:31,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:31,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245744284] [2023-08-29 23:24:31,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245744284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:31,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:31,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:24:31,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069203586] [2023-08-29 23:24:31,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:31,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:24:31,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:24:31,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:24:31,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-29 23:24:31,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 295 transitions, 5706 flow. Second operand has 8 states, 8 states have (on average 214.25) internal successors, (1714), 8 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:31,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:31,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-29 23:24:31,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:36,242 INFO L130 PetriNetUnfolder]: 20732/35165 cut-off events. [2023-08-29 23:24:36,242 INFO L131 PetriNetUnfolder]: For 275561/275641 co-relation queries the response was YES. [2023-08-29 23:24:36,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126017 conditions, 35165 events. 20732/35165 cut-off events. For 275561/275641 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 297737 event pairs, 5021 based on Foata normal form. 175/32438 useless extension candidates. Maximal degree in co-relation 125977. Up to 16090 conditions per place. [2023-08-29 23:24:36,593 INFO L137 encePairwiseOnDemand]: 415/434 looper letters, 347 selfloop transitions, 200 changer transitions 0/583 dead transitions. [2023-08-29 23:24:36,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 583 transitions, 9029 flow [2023-08-29 23:24:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:24:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:24:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3271 transitions. [2023-08-29 23:24:36,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5383475971033574 [2023-08-29 23:24:36,598 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3271 transitions. [2023-08-29 23:24:36,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3271 transitions. [2023-08-29 23:24:36,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:36,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3271 transitions. [2023-08-29 23:24:36,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 233.64285714285714) internal successors, (3271), 14 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:36,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:36,607 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:36,607 INFO L175 Difference]: Start difference. First operand has 175 places, 295 transitions, 5706 flow. Second operand 14 states and 3271 transitions. [2023-08-29 23:24:36,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 583 transitions, 9029 flow [2023-08-29 23:24:37,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 583 transitions, 9015 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 23:24:37,459 INFO L231 Difference]: Finished difference. Result has 194 places, 353 transitions, 7627 flow [2023-08-29 23:24:37,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7627, PETRI_PLACES=194, PETRI_TRANSITIONS=353} [2023-08-29 23:24:37,459 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 78 predicate places. [2023-08-29 23:24:37,459 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 353 transitions, 7627 flow [2023-08-29 23:24:37,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 214.25) internal successors, (1714), 8 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:37,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:37,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:37,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 23:24:37,460 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:37,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:37,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1644429296, now seen corresponding path program 1 times [2023-08-29 23:24:37,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:37,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257817125] [2023-08-29 23:24:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:37,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:37,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:37,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257817125] [2023-08-29 23:24:37,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257817125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:37,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:37,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:24:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537818268] [2023-08-29 23:24:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:24:37,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:24:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:24:37,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 434 [2023-08-29 23:24:37,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 353 transitions, 7627 flow. Second operand has 6 states, 6 states have (on average 218.83333333333334) internal successors, (1313), 6 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:37,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:37,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 434 [2023-08-29 23:24:37,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:44,841 INFO L130 PetriNetUnfolder]: 31019/52251 cut-off events. [2023-08-29 23:24:44,841 INFO L131 PetriNetUnfolder]: For 425657/425985 co-relation queries the response was YES. [2023-08-29 23:24:45,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182175 conditions, 52251 events. 31019/52251 cut-off events. For 425657/425985 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 466446 event pairs, 15360 based on Foata normal form. 126/46979 useless extension candidates. Maximal degree in co-relation 182128. Up to 14893 conditions per place. [2023-08-29 23:24:45,482 INFO L137 encePairwiseOnDemand]: 424/434 looper letters, 348 selfloop transitions, 107 changer transitions 0/517 dead transitions. [2023-08-29 23:24:45,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 517 transitions, 10467 flow [2023-08-29 23:24:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:24:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:24:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1461 transitions. [2023-08-29 23:24:45,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610599078341014 [2023-08-29 23:24:45,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1461 transitions. [2023-08-29 23:24:45,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1461 transitions. [2023-08-29 23:24:45,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:45,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1461 transitions. [2023-08-29 23:24:45,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 243.5) internal successors, (1461), 6 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:45,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:45,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:45,487 INFO L175 Difference]: Start difference. First operand has 194 places, 353 transitions, 7627 flow. Second operand 6 states and 1461 transitions. [2023-08-29 23:24:45,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 517 transitions, 10467 flow [2023-08-29 23:24:46,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 517 transitions, 10153 flow, removed 99 selfloop flow, removed 3 redundant places. [2023-08-29 23:24:46,780 INFO L231 Difference]: Finished difference. Result has 199 places, 408 transitions, 9348 flow [2023-08-29 23:24:46,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=7406, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9348, PETRI_PLACES=199, PETRI_TRANSITIONS=408} [2023-08-29 23:24:46,781 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 83 predicate places. [2023-08-29 23:24:46,781 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 408 transitions, 9348 flow [2023-08-29 23:24:46,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.83333333333334) internal successors, (1313), 6 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:46,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:46,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:46,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 23:24:46,782 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:46,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:46,782 INFO L85 PathProgramCache]: Analyzing trace with hash 809977930, now seen corresponding path program 2 times [2023-08-29 23:24:46,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:46,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559918673] [2023-08-29 23:24:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:46,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:47,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:47,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559918673] [2023-08-29 23:24:47,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559918673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:47,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:47,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:24:47,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731298776] [2023-08-29 23:24:47,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:47,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:24:47,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:24:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:24:47,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-08-29 23:24:47,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 408 transitions, 9348 flow. Second operand has 8 states, 8 states have (on average 216.0) internal successors, (1728), 8 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:47,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:47,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-08-29 23:24:47,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:24:54,639 INFO L130 PetriNetUnfolder]: 31056/51969 cut-off events. [2023-08-29 23:24:54,639 INFO L131 PetriNetUnfolder]: For 441880/442136 co-relation queries the response was YES. [2023-08-29 23:24:55,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183614 conditions, 51969 events. 31056/51969 cut-off events. For 441880/442136 co-relation queries the response was YES. Maximal size of possible extension queue 1368. Compared 457857 event pairs, 7841 based on Foata normal form. 159/47641 useless extension candidates. Maximal degree in co-relation 183564. Up to 21055 conditions per place. [2023-08-29 23:24:55,261 INFO L137 encePairwiseOnDemand]: 421/434 looper letters, 280 selfloop transitions, 206 changer transitions 0/538 dead transitions. [2023-08-29 23:24:55,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 538 transitions, 10807 flow [2023-08-29 23:24:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:24:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:24:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1902 transitions. [2023-08-29 23:24:55,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478110599078341 [2023-08-29 23:24:55,263 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1902 transitions. [2023-08-29 23:24:55,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1902 transitions. [2023-08-29 23:24:55,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:24:55,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1902 transitions. [2023-08-29 23:24:55,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 237.75) internal successors, (1902), 8 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:55,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 434.0) internal successors, (3906), 9 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:55,268 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 434.0) internal successors, (3906), 9 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:55,268 INFO L175 Difference]: Start difference. First operand has 199 places, 408 transitions, 9348 flow. Second operand 8 states and 1902 transitions. [2023-08-29 23:24:55,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 538 transitions, 10807 flow [2023-08-29 23:24:56,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 538 transitions, 10797 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-29 23:24:56,792 INFO L231 Difference]: Finished difference. Result has 204 places, 403 transitions, 9679 flow [2023-08-29 23:24:56,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=9267, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9679, PETRI_PLACES=204, PETRI_TRANSITIONS=403} [2023-08-29 23:24:56,793 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 88 predicate places. [2023-08-29 23:24:56,793 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 403 transitions, 9679 flow [2023-08-29 23:24:56,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 216.0) internal successors, (1728), 8 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:56,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:24:56,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:24:56,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 23:24:56,794 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:24:56,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:24:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1793657168, now seen corresponding path program 2 times [2023-08-29 23:24:56,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:24:56,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610752842] [2023-08-29 23:24:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:24:56,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:24:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:24:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:24:56,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:24:56,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610752842] [2023-08-29 23:24:56,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610752842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:24:56,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:24:56,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 23:24:56,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158236848] [2023-08-29 23:24:56,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:24:56,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:24:56,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:24:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:24:56,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:24:57,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-08-29 23:24:57,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 403 transitions, 9679 flow. Second operand has 7 states, 7 states have (on average 216.42857142857142) internal successors, (1515), 7 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:24:57,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:24:57,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-08-29 23:24:57,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:05,350 INFO L130 PetriNetUnfolder]: 33533/56843 cut-off events. [2023-08-29 23:25:05,351 INFO L131 PetriNetUnfolder]: For 592707/592987 co-relation queries the response was YES. [2023-08-29 23:25:05,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214413 conditions, 56843 events. 33533/56843 cut-off events. For 592707/592987 co-relation queries the response was YES. Maximal size of possible extension queue 1524. Compared 514504 event pairs, 8089 based on Foata normal form. 174/51743 useless extension candidates. Maximal degree in co-relation 214362. Up to 21087 conditions per place. [2023-08-29 23:25:06,093 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 348 selfloop transitions, 220 changer transitions 0/624 dead transitions. [2023-08-29 23:25:06,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 624 transitions, 13660 flow [2023-08-29 23:25:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:25:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:25:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2134 transitions. [2023-08-29 23:25:06,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463389656938044 [2023-08-29 23:25:06,096 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2134 transitions. [2023-08-29 23:25:06,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2134 transitions. [2023-08-29 23:25:06,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:06,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2134 transitions. [2023-08-29 23:25:06,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 237.11111111111111) internal successors, (2134), 9 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:06,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:06,101 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:06,101 INFO L175 Difference]: Start difference. First operand has 204 places, 403 transitions, 9679 flow. Second operand 9 states and 2134 transitions. [2023-08-29 23:25:06,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 624 transitions, 13660 flow [2023-08-29 23:25:07,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 624 transitions, 13351 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-08-29 23:25:08,005 INFO L231 Difference]: Finished difference. Result has 211 places, 474 transitions, 12589 flow [2023-08-29 23:25:08,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=9442, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12589, PETRI_PLACES=211, PETRI_TRANSITIONS=474} [2023-08-29 23:25:08,006 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 95 predicate places. [2023-08-29 23:25:08,006 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 474 transitions, 12589 flow [2023-08-29 23:25:08,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 216.42857142857142) internal successors, (1515), 7 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:08,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:08,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:08,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 23:25:08,007 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:25:08,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1325936182, now seen corresponding path program 3 times [2023-08-29 23:25:08,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:25:08,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066553483] [2023-08-29 23:25:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:25:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:25:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:25:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:08,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:25:08,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066553483] [2023-08-29 23:25:08,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066553483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:25:08,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:25:08,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:25:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180879524] [2023-08-29 23:25:08,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:25:08,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:25:08,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:25:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:25:08,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:25:08,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-29 23:25:08,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 474 transitions, 12589 flow. Second operand has 8 states, 8 states have (on average 214.25) internal successors, (1714), 8 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:08,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:08,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-29 23:25:08,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:19,162 INFO L130 PetriNetUnfolder]: 40463/66871 cut-off events. [2023-08-29 23:25:19,162 INFO L131 PetriNetUnfolder]: For 718578/718646 co-relation queries the response was YES. [2023-08-29 23:25:19,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256854 conditions, 66871 events. 40463/66871 cut-off events. For 718578/718646 co-relation queries the response was YES. Maximal size of possible extension queue 1970. Compared 601567 event pairs, 18325 based on Foata normal form. 137/61439 useless extension candidates. Maximal degree in co-relation 256799. Up to 33429 conditions per place. [2023-08-29 23:25:20,083 INFO L137 encePairwiseOnDemand]: 417/434 looper letters, 396 selfloop transitions, 352 changer transitions 0/800 dead transitions. [2023-08-29 23:25:20,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 800 transitions, 17565 flow [2023-08-29 23:25:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:25:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:25:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3274 transitions. [2023-08-29 23:25:20,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388413429888085 [2023-08-29 23:25:20,085 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3274 transitions. [2023-08-29 23:25:20,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3274 transitions. [2023-08-29 23:25:20,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:20,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3274 transitions. [2023-08-29 23:25:20,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 233.85714285714286) internal successors, (3274), 14 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:20,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:20,092 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:20,092 INFO L175 Difference]: Start difference. First operand has 211 places, 474 transitions, 12589 flow. Second operand 14 states and 3274 transitions. [2023-08-29 23:25:20,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 800 transitions, 17565 flow [2023-08-29 23:25:22,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 800 transitions, 17497 flow, removed 34 selfloop flow, removed 0 redundant places. [2023-08-29 23:25:22,295 INFO L231 Difference]: Finished difference. Result has 230 places, 557 transitions, 15822 flow [2023-08-29 23:25:22,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=12361, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15822, PETRI_PLACES=230, PETRI_TRANSITIONS=557} [2023-08-29 23:25:22,295 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 114 predicate places. [2023-08-29 23:25:22,296 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 557 transitions, 15822 flow [2023-08-29 23:25:22,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 214.25) internal successors, (1714), 8 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:22,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:22,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:22,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 23:25:22,296 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:25:22,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1023465888, now seen corresponding path program 4 times [2023-08-29 23:25:22,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:25:22,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008577509] [2023-08-29 23:25:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:25:22,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:25:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:25:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:22,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:25:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008577509] [2023-08-29 23:25:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008577509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:25:22,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:25:22,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 23:25:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872070073] [2023-08-29 23:25:22,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:25:22,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:25:22,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:25:22,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:25:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:25:22,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-08-29 23:25:22,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 557 transitions, 15822 flow. Second operand has 7 states, 7 states have (on average 216.42857142857142) internal successors, (1515), 7 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:22,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:22,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-08-29 23:25:22,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:33,415 INFO L130 PetriNetUnfolder]: 35568/60440 cut-off events. [2023-08-29 23:25:33,415 INFO L131 PetriNetUnfolder]: For 823002/823422 co-relation queries the response was YES. [2023-08-29 23:25:34,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247832 conditions, 60440 events. 35568/60440 cut-off events. For 823002/823422 co-relation queries the response was YES. Maximal size of possible extension queue 1773. Compared 554768 event pairs, 9817 based on Foata normal form. 134/54708 useless extension candidates. Maximal degree in co-relation 247771. Up to 21087 conditions per place. [2023-08-29 23:25:34,276 INFO L137 encePairwiseOnDemand]: 421/434 looper letters, 321 selfloop transitions, 295 changer transitions 0/682 dead transitions. [2023-08-29 23:25:34,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 682 transitions, 17480 flow [2023-08-29 23:25:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:25:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:25:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1900 transitions. [2023-08-29 23:25:34,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472350230414746 [2023-08-29 23:25:34,279 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1900 transitions. [2023-08-29 23:25:34,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1900 transitions. [2023-08-29 23:25:34,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:34,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1900 transitions. [2023-08-29 23:25:34,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 237.5) internal successors, (1900), 8 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:34,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 434.0) internal successors, (3906), 9 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:34,282 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 434.0) internal successors, (3906), 9 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:34,283 INFO L175 Difference]: Start difference. First operand has 230 places, 557 transitions, 15822 flow. Second operand 8 states and 1900 transitions. [2023-08-29 23:25:34,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 682 transitions, 17480 flow [2023-08-29 23:25:36,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 682 transitions, 17170 flow, removed 97 selfloop flow, removed 3 redundant places. [2023-08-29 23:25:36,914 INFO L231 Difference]: Finished difference. Result has 231 places, 548 transitions, 15952 flow [2023-08-29 23:25:36,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=15362, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15952, PETRI_PLACES=231, PETRI_TRANSITIONS=548} [2023-08-29 23:25:36,915 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 115 predicate places. [2023-08-29 23:25:36,915 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 548 transitions, 15952 flow [2023-08-29 23:25:36,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 216.42857142857142) internal successors, (1515), 7 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:36,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:36,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:36,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 23:25:36,915 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:25:36,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:36,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1094398370, now seen corresponding path program 1 times [2023-08-29 23:25:36,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:25:36,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114167138] [2023-08-29 23:25:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:25:36,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:25:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:25:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:37,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:25:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114167138] [2023-08-29 23:25:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114167138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:25:37,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:25:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-29 23:25:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636016521] [2023-08-29 23:25:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:25:37,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:25:37,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:25:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:25:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:25:37,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 434 [2023-08-29 23:25:37,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 548 transitions, 15952 flow. Second operand has 10 states, 10 states have (on average 209.9) internal successors, (2099), 10 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:37,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:37,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 434 [2023-08-29 23:25:37,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:25:51,490 INFO L130 PetriNetUnfolder]: 44121/72126 cut-off events. [2023-08-29 23:25:51,491 INFO L131 PetriNetUnfolder]: For 887128/887144 co-relation queries the response was YES. [2023-08-29 23:25:52,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283549 conditions, 72126 events. 44121/72126 cut-off events. For 887128/887144 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 642097 event pairs, 10427 based on Foata normal form. 100/66344 useless extension candidates. Maximal degree in co-relation 283489. Up to 37348 conditions per place. [2023-08-29 23:25:52,515 INFO L137 encePairwiseOnDemand]: 415/434 looper letters, 449 selfloop transitions, 432 changer transitions 0/909 dead transitions. [2023-08-29 23:25:52,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 909 transitions, 20562 flow [2023-08-29 23:25:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-29 23:25:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-29 23:25:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5181 transitions. [2023-08-29 23:25:52,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190342616710079 [2023-08-29 23:25:52,519 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5181 transitions. [2023-08-29 23:25:52,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5181 transitions. [2023-08-29 23:25:52,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:25:52,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5181 transitions. [2023-08-29 23:25:52,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 225.2608695652174) internal successors, (5181), 23 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:52,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 434.0) internal successors, (10416), 24 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:52,529 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 434.0) internal successors, (10416), 24 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:52,529 INFO L175 Difference]: Start difference. First operand has 231 places, 548 transitions, 15952 flow. Second operand 23 states and 5181 transitions. [2023-08-29 23:25:52,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 909 transitions, 20562 flow [2023-08-29 23:25:55,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 909 transitions, 19814 flow, removed 43 selfloop flow, removed 7 redundant places. [2023-08-29 23:25:55,323 INFO L231 Difference]: Finished difference. Result has 249 places, 594 transitions, 17371 flow [2023-08-29 23:25:55,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=15178, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=17371, PETRI_PLACES=249, PETRI_TRANSITIONS=594} [2023-08-29 23:25:55,324 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 133 predicate places. [2023-08-29 23:25:55,324 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 594 transitions, 17371 flow [2023-08-29 23:25:55,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 209.9) internal successors, (2099), 10 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:55,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:25:55,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:25:55,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 23:25:55,325 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:25:55,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:25:55,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1842512057, now seen corresponding path program 1 times [2023-08-29 23:25:55,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:25:55,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941034059] [2023-08-29 23:25:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:25:55,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:25:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:25:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:25:55,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:25:55,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941034059] [2023-08-29 23:25:55,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941034059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:25:55,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:25:55,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:25:55,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534544684] [2023-08-29 23:25:55,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:25:55,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:25:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:25:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:25:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:25:55,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-29 23:25:55,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 594 transitions, 17371 flow. Second operand has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:25:55,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:25:55,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-29 23:25:55,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:08,861 INFO L130 PetriNetUnfolder]: 43242/70574 cut-off events. [2023-08-29 23:26:08,861 INFO L131 PetriNetUnfolder]: For 908540/908564 co-relation queries the response was YES. [2023-08-29 23:26:09,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279130 conditions, 70574 events. 43242/70574 cut-off events. For 908540/908564 co-relation queries the response was YES. Maximal size of possible extension queue 2071. Compared 627294 event pairs, 17763 based on Foata normal form. 80/65229 useless extension candidates. Maximal degree in co-relation 279069. Up to 36370 conditions per place. [2023-08-29 23:26:09,858 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 414 selfloop transitions, 372 changer transitions 0/840 dead transitions. [2023-08-29 23:26:09,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 840 transitions, 20687 flow [2023-08-29 23:26:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:26:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:26:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3260 transitions. [2023-08-29 23:26:09,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365371955233706 [2023-08-29 23:26:09,861 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3260 transitions. [2023-08-29 23:26:09,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3260 transitions. [2023-08-29 23:26:09,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:09,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3260 transitions. [2023-08-29 23:26:09,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 232.85714285714286) internal successors, (3260), 14 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:09,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:09,870 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:09,870 INFO L175 Difference]: Start difference. First operand has 249 places, 594 transitions, 17371 flow. Second operand 14 states and 3260 transitions. [2023-08-29 23:26:09,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 840 transitions, 20687 flow [2023-08-29 23:26:13,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 840 transitions, 20067 flow, removed 150 selfloop flow, removed 4 redundant places. [2023-08-29 23:26:13,549 INFO L231 Difference]: Finished difference. Result has 260 places, 603 transitions, 17998 flow [2023-08-29 23:26:13,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=16720, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17998, PETRI_PLACES=260, PETRI_TRANSITIONS=603} [2023-08-29 23:26:13,551 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 144 predicate places. [2023-08-29 23:26:13,551 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 603 transitions, 17998 flow [2023-08-29 23:26:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:13,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:13,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 23:26:13,552 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:26:13,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 811860203, now seen corresponding path program 1 times [2023-08-29 23:26:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:13,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916178009] [2023-08-29 23:26:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:13,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:13,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:13,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916178009] [2023-08-29 23:26:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916178009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:13,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:13,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:26:13,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899297797] [2023-08-29 23:26:13,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:13,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:26:13,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:13,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:26:13,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:26:14,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 434 [2023-08-29 23:26:14,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 603 transitions, 17998 flow. Second operand has 8 states, 8 states have (on average 210.5) internal successors, (1684), 8 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:14,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:14,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 434 [2023-08-29 23:26:14,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:35,356 INFO L130 PetriNetUnfolder]: 72960/115964 cut-off events. [2023-08-29 23:26:35,357 INFO L131 PetriNetUnfolder]: For 1223284/1223354 co-relation queries the response was YES. [2023-08-29 23:26:36,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420500 conditions, 115964 events. 72960/115964 cut-off events. For 1223284/1223354 co-relation queries the response was YES. Maximal size of possible extension queue 3256. Compared 1064064 event pairs, 17876 based on Foata normal form. 142/107339 useless extension candidates. Maximal degree in co-relation 420437. Up to 34520 conditions per place. [2023-08-29 23:26:37,195 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 475 selfloop transitions, 379 changer transitions 0/896 dead transitions. [2023-08-29 23:26:37,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 896 transitions, 24205 flow [2023-08-29 23:26:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:26:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:26:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2544 transitions. [2023-08-29 23:26:37,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328864683703394 [2023-08-29 23:26:37,198 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2544 transitions. [2023-08-29 23:26:37,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2544 transitions. [2023-08-29 23:26:37,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:37,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2544 transitions. [2023-08-29 23:26:37,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 231.27272727272728) internal successors, (2544), 11 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:37,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:37,205 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:37,205 INFO L175 Difference]: Start difference. First operand has 260 places, 603 transitions, 17998 flow. Second operand 11 states and 2544 transitions. [2023-08-29 23:26:37,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 896 transitions, 24205 flow [2023-08-29 23:26:44,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 896 transitions, 24133 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 23:26:44,828 INFO L231 Difference]: Finished difference. Result has 273 places, 704 transitions, 23193 flow [2023-08-29 23:26:44,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=17946, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23193, PETRI_PLACES=273, PETRI_TRANSITIONS=704} [2023-08-29 23:26:44,829 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 157 predicate places. [2023-08-29 23:26:44,830 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 704 transitions, 23193 flow [2023-08-29 23:26:44,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 210.5) internal successors, (1684), 8 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:44,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:44,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:44,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-29 23:26:44,831 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:26:44,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash 360594652, now seen corresponding path program 2 times [2023-08-29 23:26:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:44,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017715762] [2023-08-29 23:26:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:44,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017715762] [2023-08-29 23:26:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017715762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:45,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:45,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:26:45,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451032995] [2023-08-29 23:26:45,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:45,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:26:45,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:45,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:26:45,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:26:45,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-29 23:26:45,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 704 transitions, 23193 flow. Second operand has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:45,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:45,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-29 23:26:45,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:08,024 INFO L130 PetriNetUnfolder]: 72623/115026 cut-off events. [2023-08-29 23:27:08,024 INFO L131 PetriNetUnfolder]: For 1414286/1414476 co-relation queries the response was YES. [2023-08-29 23:27:09,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433245 conditions, 115026 events. 72623/115026 cut-off events. For 1414286/1414476 co-relation queries the response was YES. Maximal size of possible extension queue 3254. Compared 1051365 event pairs, 28246 based on Foata normal form. 262/105170 useless extension candidates. Maximal degree in co-relation 433176. Up to 70828 conditions per place. [2023-08-29 23:27:10,302 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 408 selfloop transitions, 458 changer transitions 0/916 dead transitions. [2023-08-29 23:27:10,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 916 transitions, 26116 flow [2023-08-29 23:27:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:27:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:27:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3248 transitions. [2023-08-29 23:27:10,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345622119815668 [2023-08-29 23:27:10,306 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3248 transitions. [2023-08-29 23:27:10,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3248 transitions. [2023-08-29 23:27:10,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:10,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3248 transitions. [2023-08-29 23:27:10,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 232.0) internal successors, (3248), 14 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:10,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:10,315 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:10,315 INFO L175 Difference]: Start difference. First operand has 273 places, 704 transitions, 23193 flow. Second operand 14 states and 3248 transitions. [2023-08-29 23:27:10,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 916 transitions, 26116 flow [2023-08-29 23:27:19,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 916 transitions, 26068 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-29 23:27:19,897 INFO L231 Difference]: Finished difference. Result has 286 places, 712 transitions, 24435 flow [2023-08-29 23:27:19,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=23145, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24435, PETRI_PLACES=286, PETRI_TRANSITIONS=712} [2023-08-29 23:27:19,899 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 170 predicate places. [2023-08-29 23:27:19,899 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 712 transitions, 24435 flow [2023-08-29 23:27:19,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:19,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:27:19,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:27:19,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-29 23:27:19,900 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:27:19,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:27:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1012800857, now seen corresponding path program 2 times [2023-08-29 23:27:19,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:27:19,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886281217] [2023-08-29 23:27:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:27:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:27:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:27:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:20,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:27:20,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886281217] [2023-08-29 23:27:20,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886281217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:27:20,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:27:20,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:27:20,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886303647] [2023-08-29 23:27:20,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:27:20,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:27:20,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:27:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:27:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:27:20,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 434 [2023-08-29 23:27:20,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 712 transitions, 24435 flow. Second operand has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:20,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:27:20,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 434 [2023-08-29 23:27:20,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:44,105 INFO L130 PetriNetUnfolder]: 74280/120522 cut-off events. [2023-08-29 23:27:44,105 INFO L131 PetriNetUnfolder]: For 1570161/1570735 co-relation queries the response was YES. [2023-08-29 23:27:45,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453531 conditions, 120522 events. 74280/120522 cut-off events. For 1570161/1570735 co-relation queries the response was YES. Maximal size of possible extension queue 3551. Compared 1144760 event pairs, 41474 based on Foata normal form. 44/108482 useless extension candidates. Maximal degree in co-relation 453460. Up to 29244 conditions per place. [2023-08-29 23:27:46,617 INFO L137 encePairwiseOnDemand]: 424/434 looper letters, 536 selfloop transitions, 212 changer transitions 0/843 dead transitions. [2023-08-29 23:27:46,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 843 transitions, 27231 flow [2023-08-29 23:27:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:27:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:27:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1459 transitions. [2023-08-29 23:27:46,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602918586789555 [2023-08-29 23:27:46,619 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1459 transitions. [2023-08-29 23:27:46,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1459 transitions. [2023-08-29 23:27:46,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:46,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1459 transitions. [2023-08-29 23:27:46,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 243.16666666666666) internal successors, (1459), 6 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:46,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:46,622 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:46,622 INFO L175 Difference]: Start difference. First operand has 286 places, 712 transitions, 24435 flow. Second operand 6 states and 1459 transitions. [2023-08-29 23:27:46,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 843 transitions, 27231 flow [2023-08-29 23:28:00,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 843 transitions, 26493 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-08-29 23:28:00,514 INFO L231 Difference]: Finished difference. Result has 281 places, 736 transitions, 25421 flow [2023-08-29 23:28:00,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=23743, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=25421, PETRI_PLACES=281, PETRI_TRANSITIONS=736} [2023-08-29 23:28:00,516 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 165 predicate places. [2023-08-29 23:28:00,516 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 736 transitions, 25421 flow [2023-08-29 23:28:00,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:00,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:00,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:00,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-29 23:28:00,517 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:28:00,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash -402064134, now seen corresponding path program 3 times [2023-08-29 23:28:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:00,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340733363] [2023-08-29 23:28:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:00,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:00,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:00,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340733363] [2023-08-29 23:28:00,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340733363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:00,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:00,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-29 23:28:00,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121542767] [2023-08-29 23:28:00,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:00,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:28:00,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:28:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:28:01,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 434 [2023-08-29 23:28:01,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 736 transitions, 25421 flow. Second operand has 9 states, 9 states have (on average 208.0) internal successors, (1872), 9 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:01,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:01,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 434 [2023-08-29 23:28:01,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:28,769 INFO L130 PetriNetUnfolder]: 81184/129933 cut-off events. [2023-08-29 23:28:28,769 INFO L131 PetriNetUnfolder]: For 1647651/1647767 co-relation queries the response was YES. [2023-08-29 23:28:30,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494143 conditions, 129933 events. 81184/129933 cut-off events. For 1647651/1647767 co-relation queries the response was YES. Maximal size of possible extension queue 3714. Compared 1220236 event pairs, 32021 based on Foata normal form. 62/118958 useless extension candidates. Maximal degree in co-relation 494071. Up to 55073 conditions per place. [2023-08-29 23:28:31,436 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 424 selfloop transitions, 511 changer transitions 0/994 dead transitions. [2023-08-29 23:28:31,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 994 transitions, 29752 flow [2023-08-29 23:28:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 23:28:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 23:28:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3172 transitions. [2023-08-29 23:28:31,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220539828834759 [2023-08-29 23:28:31,438 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3172 transitions. [2023-08-29 23:28:31,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3172 transitions. [2023-08-29 23:28:31,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:31,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3172 transitions. [2023-08-29 23:28:31,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 226.57142857142858) internal successors, (3172), 14 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:31,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:31,447 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 434.0) internal successors, (6510), 15 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:31,447 INFO L175 Difference]: Start difference. First operand has 281 places, 736 transitions, 25421 flow. Second operand 14 states and 3172 transitions. [2023-08-29 23:28:31,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 994 transitions, 29752 flow [2023-08-29 23:28:48,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 994 transitions, 29752 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:28:48,520 INFO L231 Difference]: Finished difference. Result has 298 places, 779 transitions, 28555 flow [2023-08-29 23:28:48,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=25421, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=28555, PETRI_PLACES=298, PETRI_TRANSITIONS=779} [2023-08-29 23:28:48,521 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 182 predicate places. [2023-08-29 23:28:48,521 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 779 transitions, 28555 flow [2023-08-29 23:28:48,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 208.0) internal successors, (1872), 9 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:48,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:48,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:48,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-29 23:28:48,522 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:28:48,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:48,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1301768862, now seen corresponding path program 4 times [2023-08-29 23:28:48,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:48,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978217139] [2023-08-29 23:28:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:48,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:48,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:48,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978217139] [2023-08-29 23:28:48,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978217139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:48,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:48,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:28:48,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763934190] [2023-08-29 23:28:48,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:48,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:28:48,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:48,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:28:48,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:28:49,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 434 [2023-08-29 23:28:49,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 779 transitions, 28555 flow. Second operand has 8 states, 8 states have (on average 212.25) internal successors, (1698), 8 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:49,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:49,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 434 [2023-08-29 23:28:49,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:29:17,190 INFO L130 PetriNetUnfolder]: 79759/128110 cut-off events. [2023-08-29 23:29:17,191 INFO L131 PetriNetUnfolder]: For 1895140/1895328 co-relation queries the response was YES. [2023-08-29 23:29:19,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499047 conditions, 128110 events. 79759/128110 cut-off events. For 1895140/1895328 co-relation queries the response was YES. Maximal size of possible extension queue 3684. Compared 1209902 event pairs, 28973 based on Foata normal form. 116/117013 useless extension candidates. Maximal degree in co-relation 498971. Up to 30908 conditions per place. [2023-08-29 23:29:19,917 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 503 selfloop transitions, 395 changer transitions 0/972 dead transitions. [2023-08-29 23:29:19,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 972 transitions, 31115 flow [2023-08-29 23:29:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:29:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:29:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2566 transitions. [2023-08-29 23:29:19,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374947633012149 [2023-08-29 23:29:19,920 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2566 transitions. [2023-08-29 23:29:19,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2566 transitions. [2023-08-29 23:29:19,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:29:19,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2566 transitions. [2023-08-29 23:29:19,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 233.27272727272728) internal successors, (2566), 11 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:29:19,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:29:19,927 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:29:19,927 INFO L175 Difference]: Start difference. First operand has 298 places, 779 transitions, 28555 flow. Second operand 11 states and 2566 transitions. [2023-08-29 23:29:19,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 972 transitions, 31115 flow [2023-08-29 23:29:39,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 972 transitions, 30978 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-08-29 23:29:39,328 INFO L231 Difference]: Finished difference. Result has 308 places, 779 transitions, 29381 flow [2023-08-29 23:29:39,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=28418, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=29381, PETRI_PLACES=308, PETRI_TRANSITIONS=779} [2023-08-29 23:29:39,329 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 192 predicate places. [2023-08-29 23:29:39,329 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 779 transitions, 29381 flow [2023-08-29 23:29:39,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 212.25) internal successors, (1698), 8 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:29:39,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:29:39,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:29:39,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-29 23:29:39,330 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:29:39,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:29:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1593048551, now seen corresponding path program 3 times [2023-08-29 23:29:39,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:29:39,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246245588] [2023-08-29 23:29:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:29:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:29:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:29:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:29:39,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:29:39,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246245588] [2023-08-29 23:29:39,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246245588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:29:39,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:29:39,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 23:29:39,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278660181] [2023-08-29 23:29:39,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:29:39,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:29:39,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:29:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:29:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:29:39,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-08-29 23:29:39,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 779 transitions, 29381 flow. Second operand has 7 states, 7 states have (on average 216.57142857142858) internal successors, (1516), 7 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:29:39,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:29:39,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-08-29 23:29:39,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:30:09,320 INFO L130 PetriNetUnfolder]: 78520/126256 cut-off events. [2023-08-29 23:30:09,321 INFO L131 PetriNetUnfolder]: For 2177266/2177606 co-relation queries the response was YES. [2023-08-29 23:30:11,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518292 conditions, 126256 events. 78520/126256 cut-off events. For 2177266/2177606 co-relation queries the response was YES. Maximal size of possible extension queue 3633. Compared 1188992 event pairs, 41793 based on Foata normal form. 48/114648 useless extension candidates. Maximal degree in co-relation 518214. Up to 52456 conditions per place. [2023-08-29 23:30:12,090 INFO L137 encePairwiseOnDemand]: 421/434 looper letters, 474 selfloop transitions, 405 changer transitions 0/968 dead transitions. [2023-08-29 23:30:12,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 968 transitions, 34238 flow [2023-08-29 23:30:12,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:30:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:30:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1902 transitions. [2023-08-29 23:30:12,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478110599078341 [2023-08-29 23:30:12,092 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1902 transitions. [2023-08-29 23:30:12,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1902 transitions. [2023-08-29 23:30:12,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:30:12,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1902 transitions. [2023-08-29 23:30:12,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 237.75) internal successors, (1902), 8 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:30:12,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 434.0) internal successors, (3906), 9 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:30:12,097 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 434.0) internal successors, (3906), 9 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:30:12,097 INFO L175 Difference]: Start difference. First operand has 308 places, 779 transitions, 29381 flow. Second operand 8 states and 1902 transitions. [2023-08-29 23:30:12,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 968 transitions, 34238 flow [2023-08-29 23:30:32,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 968 transitions, 33384 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-08-29 23:30:33,014 INFO L231 Difference]: Finished difference. Result has 306 places, 827 transitions, 32132 flow [2023-08-29 23:30:33,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=28595, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=32132, PETRI_PLACES=306, PETRI_TRANSITIONS=827} [2023-08-29 23:30:33,015 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 190 predicate places. [2023-08-29 23:30:33,015 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 827 transitions, 32132 flow [2023-08-29 23:30:33,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 216.57142857142858) internal successors, (1516), 7 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:30:33,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:30:33,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:30:33,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-29 23:30:33,016 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:30:33,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:30:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash 233244418, now seen corresponding path program 5 times [2023-08-29 23:30:33,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:30:33,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45197112] [2023-08-29 23:30:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:30:33,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:30:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:30:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:30:33,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:30:33,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45197112] [2023-08-29 23:30:33,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45197112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:30:33,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:30:33,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:30:33,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100957279] [2023-08-29 23:30:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:30:33,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:30:33,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:30:33,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:30:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:30:33,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 434 [2023-08-29 23:30:33,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 827 transitions, 32132 flow. Second operand has 8 states, 8 states have (on average 212.25) internal successors, (1698), 8 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:30:33,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:30:33,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 434 [2023-08-29 23:30:33,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:31:04,100 INFO L130 PetriNetUnfolder]: 81139/130376 cut-off events. [2023-08-29 23:31:04,100 INFO L131 PetriNetUnfolder]: For 2304052/2304276 co-relation queries the response was YES. [2023-08-29 23:31:06,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532821 conditions, 130376 events. 81139/130376 cut-off events. For 2304052/2304276 co-relation queries the response was YES. Maximal size of possible extension queue 3741. Compared 1234060 event pairs, 39170 based on Foata normal form. 100/118723 useless extension candidates. Maximal degree in co-relation 532743. Up to 38588 conditions per place. [2023-08-29 23:31:06,613 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 512 selfloop transitions, 444 changer transitions 0/1034 dead transitions. [2023-08-29 23:31:06,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1034 transitions, 34890 flow [2023-08-29 23:31:06,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:31:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:31:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2581 transitions. [2023-08-29 23:31:06,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406367825722664 [2023-08-29 23:31:06,616 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2581 transitions. [2023-08-29 23:31:06,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2581 transitions. [2023-08-29 23:31:06,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:31:06,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2581 transitions. [2023-08-29 23:31:06,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 234.63636363636363) internal successors, (2581), 11 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:06,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:06,623 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:06,623 INFO L175 Difference]: Start difference. First operand has 306 places, 827 transitions, 32132 flow. Second operand 11 states and 2581 transitions. [2023-08-29 23:31:06,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1034 transitions, 34890 flow [2023-08-29 23:31:25,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 1034 transitions, 34396 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-29 23:31:25,924 INFO L231 Difference]: Finished difference. Result has 308 places, 824 transitions, 32472 flow [2023-08-29 23:31:25,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=31564, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=32472, PETRI_PLACES=308, PETRI_TRANSITIONS=824} [2023-08-29 23:31:25,925 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 192 predicate places. [2023-08-29 23:31:25,925 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 824 transitions, 32472 flow [2023-08-29 23:31:25,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 212.25) internal successors, (1698), 8 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:25,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:31:25,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:31:25,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-29 23:31:25,926 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:31:25,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:31:25,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1809814085, now seen corresponding path program 4 times [2023-08-29 23:31:25,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:31:25,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746403714] [2023-08-29 23:31:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:31:25,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:31:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:31:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:31:26,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:31:26,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746403714] [2023-08-29 23:31:26,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746403714] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:31:26,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:31:26,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 23:31:26,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514977920] [2023-08-29 23:31:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:31:26,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:31:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:31:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:31:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:31:26,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-29 23:31:26,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 824 transitions, 32472 flow. Second operand has 7 states, 7 states have (on average 214.85714285714286) internal successors, (1504), 7 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:26,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:31:26,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-29 23:31:26,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:31:59,141 INFO L130 PetriNetUnfolder]: 90658/142664 cut-off events. [2023-08-29 23:31:59,142 INFO L131 PetriNetUnfolder]: For 2434632/2434696 co-relation queries the response was YES. [2023-08-29 23:32:01,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575866 conditions, 142664 events. 90658/142664 cut-off events. For 2434632/2434696 co-relation queries the response was YES. Maximal size of possible extension queue 3969. Compared 1319964 event pairs, 38334 based on Foata normal form. 72/130577 useless extension candidates. Maximal degree in co-relation 575790. Up to 62216 conditions per place. [2023-08-29 23:32:02,221 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 498 selfloop transitions, 442 changer transitions 0/995 dead transitions. [2023-08-29 23:32:02,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 995 transitions, 36175 flow [2023-08-29 23:32:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:32:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:32:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2113 transitions. [2023-08-29 23:32:02,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409626216077829 [2023-08-29 23:32:02,223 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2113 transitions. [2023-08-29 23:32:02,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2113 transitions. [2023-08-29 23:32:02,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:32:02,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2113 transitions. [2023-08-29 23:32:02,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 234.77777777777777) internal successors, (2113), 9 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:02,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:02,229 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:02,229 INFO L175 Difference]: Start difference. First operand has 308 places, 824 transitions, 32472 flow. Second operand 9 states and 2113 transitions. [2023-08-29 23:32:02,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 995 transitions, 36175 flow [2023-08-29 23:32:27,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 995 transitions, 35833 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-08-29 23:32:27,715 INFO L231 Difference]: Finished difference. Result has 310 places, 844 transitions, 34580 flow [2023-08-29 23:32:27,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=32060, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=34580, PETRI_PLACES=310, PETRI_TRANSITIONS=844} [2023-08-29 23:32:27,716 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 194 predicate places. [2023-08-29 23:32:27,716 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 844 transitions, 34580 flow [2023-08-29 23:32:27,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 214.85714285714286) internal successors, (1504), 7 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:27,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:32:27,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:32:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-29 23:32:27,717 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:32:27,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:32:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash 51029860, now seen corresponding path program 1 times [2023-08-29 23:32:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:32:27,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000780025] [2023-08-29 23:32:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:32:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:32:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:32:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:32:28,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:32:28,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000780025] [2023-08-29 23:32:28,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000780025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:32:28,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:32:28,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-29 23:32:28,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481988607] [2023-08-29 23:32:28,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:32:28,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:32:28,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:32:28,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:32:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:32:28,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 434 [2023-08-29 23:32:28,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 844 transitions, 34580 flow. Second operand has 10 states, 10 states have (on average 205.6) internal successors, (2056), 10 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:28,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:32:28,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 434 [2023-08-29 23:32:28,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:32:56,727 INFO L130 PetriNetUnfolder]: 70425/116642 cut-off events. [2023-08-29 23:32:56,727 INFO L131 PetriNetUnfolder]: For 2510974/2511754 co-relation queries the response was YES. [2023-08-29 23:32:58,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508676 conditions, 116642 events. 70425/116642 cut-off events. For 2510974/2511754 co-relation queries the response was YES. Maximal size of possible extension queue 3400. Compared 1135372 event pairs, 43137 based on Foata normal form. 32/104608 useless extension candidates. Maximal degree in co-relation 508601. Up to 75287 conditions per place. [2023-08-29 23:32:59,323 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 440 selfloop transitions, 356 changer transitions 0/934 dead transitions. [2023-08-29 23:32:59,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 934 transitions, 36784 flow [2023-08-29 23:32:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:32:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:32:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2355 transitions. [2023-08-29 23:32:59,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932970255550901 [2023-08-29 23:32:59,326 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2355 transitions. [2023-08-29 23:32:59,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2355 transitions. [2023-08-29 23:32:59,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:32:59,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2355 transitions. [2023-08-29 23:32:59,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 214.0909090909091) internal successors, (2355), 11 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:59,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:59,332 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:32:59,333 INFO L175 Difference]: Start difference. First operand has 310 places, 844 transitions, 34580 flow. Second operand 11 states and 2355 transitions. [2023-08-29 23:32:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 934 transitions, 36784 flow [2023-08-29 23:33:21,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 934 transitions, 35918 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 23:33:21,951 INFO L231 Difference]: Finished difference. Result has 311 places, 849 transitions, 34578 flow [2023-08-29 23:33:21,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=33704, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=34578, PETRI_PLACES=311, PETRI_TRANSITIONS=849} [2023-08-29 23:33:21,952 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 195 predicate places. [2023-08-29 23:33:21,952 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 849 transitions, 34578 flow [2023-08-29 23:33:21,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.6) internal successors, (2056), 10 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:33:21,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:33:21,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:33:21,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-29 23:33:21,952 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:33:21,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:33:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1888106630, now seen corresponding path program 1 times [2023-08-29 23:33:21,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:33:21,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009294096] [2023-08-29 23:33:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:33:21,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:33:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:33:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:33:22,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:33:22,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009294096] [2023-08-29 23:33:22,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009294096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:33:22,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:33:22,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:33:22,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368398074] [2023-08-29 23:33:22,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:33:22,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:33:22,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:33:22,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:33:22,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:33:22,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 434 [2023-08-29 23:33:22,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 849 transitions, 34578 flow. Second operand has 9 states, 9 states have (on average 210.33333333333334) internal successors, (1893), 9 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:33:22,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:33:22,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 434 [2023-08-29 23:33:22,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:33:52,772 INFO L130 PetriNetUnfolder]: 80845/130191 cut-off events. [2023-08-29 23:33:52,773 INFO L131 PetriNetUnfolder]: For 2473311/2473631 co-relation queries the response was YES. [2023-08-29 23:33:54,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549529 conditions, 130191 events. 80845/130191 cut-off events. For 2473311/2473631 co-relation queries the response was YES. Maximal size of possible extension queue 3765. Compared 1239578 event pairs, 42953 based on Foata normal form. 33/118452 useless extension candidates. Maximal degree in co-relation 549457. Up to 88857 conditions per place. [2023-08-29 23:33:55,391 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 519 selfloop transitions, 324 changer transitions 0/942 dead transitions. [2023-08-29 23:33:55,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 942 transitions, 36576 flow [2023-08-29 23:33:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:33:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:33:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2009 transitions. [2023-08-29 23:33:55,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514336917562724 [2023-08-29 23:33:55,393 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2009 transitions. [2023-08-29 23:33:55,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2009 transitions. [2023-08-29 23:33:55,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:33:55,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2009 transitions. [2023-08-29 23:33:55,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.22222222222223) internal successors, (2009), 9 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:33:55,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:33:55,397 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:33:55,397 INFO L175 Difference]: Start difference. First operand has 311 places, 849 transitions, 34578 flow. Second operand 9 states and 2009 transitions. [2023-08-29 23:33:55,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 942 transitions, 36576 flow [2023-08-29 23:34:15,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 942 transitions, 36009 flow, removed 32 selfloop flow, removed 9 redundant places. [2023-08-29 23:34:15,949 INFO L231 Difference]: Finished difference. Result has 313 places, 845 transitions, 34890 flow [2023-08-29 23:34:15,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=33821, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=34890, PETRI_PLACES=313, PETRI_TRANSITIONS=845} [2023-08-29 23:34:15,950 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 197 predicate places. [2023-08-29 23:34:15,950 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 845 transitions, 34890 flow [2023-08-29 23:34:15,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 210.33333333333334) internal successors, (1893), 9 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:34:15,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:34:15,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:34:15,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-29 23:34:15,951 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:34:15,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:34:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1867126093, now seen corresponding path program 1 times [2023-08-29 23:34:15,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:34:15,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978280778] [2023-08-29 23:34:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:34:15,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:34:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:34:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:34:16,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:34:16,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978280778] [2023-08-29 23:34:16,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978280778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:34:16,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:34:16,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 23:34:16,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113453208] [2023-08-29 23:34:16,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:34:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 23:34:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:34:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 23:34:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-29 23:34:16,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 434 [2023-08-29 23:34:16,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 845 transitions, 34890 flow. Second operand has 9 states, 9 states have (on average 210.22222222222223) internal successors, (1892), 9 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:34:16,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:34:16,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 434 [2023-08-29 23:34:16,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:34:44,959 INFO L130 PetriNetUnfolder]: 70478/116712 cut-off events. [2023-08-29 23:34:44,959 INFO L131 PetriNetUnfolder]: For 2669483/2670283 co-relation queries the response was YES. [2023-08-29 23:34:46,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506380 conditions, 116712 events. 70478/116712 cut-off events. For 2669483/2670283 co-relation queries the response was YES. Maximal size of possible extension queue 3323. Compared 1134335 event pairs, 29489 based on Foata normal form. 35/104938 useless extension candidates. Maximal degree in co-relation 506308. Up to 75287 conditions per place. [2023-08-29 23:34:47,524 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 439 selfloop transitions, 352 changer transitions 0/926 dead transitions. [2023-08-29 23:34:47,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 926 transitions, 36853 flow [2023-08-29 23:34:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 23:34:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 23:34:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2397 transitions. [2023-08-29 23:34:47,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020946795140343 [2023-08-29 23:34:47,526 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2397 transitions. [2023-08-29 23:34:47,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2397 transitions. [2023-08-29 23:34:47,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:34:47,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2397 transitions. [2023-08-29 23:34:47,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 217.9090909090909) internal successors, (2397), 11 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:34:47,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:34:47,530 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:34:47,530 INFO L175 Difference]: Start difference. First operand has 313 places, 845 transitions, 34890 flow. Second operand 11 states and 2397 transitions. [2023-08-29 23:34:47,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 926 transitions, 36853 flow [2023-08-29 23:35:09,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 926 transitions, 35692 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-08-29 23:35:09,305 INFO L231 Difference]: Finished difference. Result has 314 places, 842 transitions, 34388 flow [2023-08-29 23:35:09,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=33684, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=34388, PETRI_PLACES=314, PETRI_TRANSITIONS=842} [2023-08-29 23:35:09,306 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 198 predicate places. [2023-08-29 23:35:09,307 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 842 transitions, 34388 flow [2023-08-29 23:35:09,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 210.22222222222223) internal successors, (1892), 9 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:09,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:09,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:09,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-29 23:35:09,307 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:35:09,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:09,307 INFO L85 PathProgramCache]: Analyzing trace with hash 329472186, now seen corresponding path program 1 times [2023-08-29 23:35:09,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:09,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118922170] [2023-08-29 23:35:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:09,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:09,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:09,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118922170] [2023-08-29 23:35:09,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118922170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:09,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:09,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:35:09,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396478103] [2023-08-29 23:35:09,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:09,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:35:09,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:09,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:35:09,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:35:09,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 434 [2023-08-29 23:35:09,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 842 transitions, 34388 flow. Second operand has 4 states, 4 states have (on average 241.5) internal successors, (966), 4 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:09,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:09,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 434 [2023-08-29 23:35:09,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15