./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 TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/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 TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:41:13,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:41:13,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:41:14,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:41:14,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:41:14,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:41:14,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:41:14,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:41:14,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:41:14,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:41:14,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:41:14,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:41:14,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:41:14,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:41:14,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:41:14,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:41:14,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:41:14,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:41:14,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:41:14,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:41:14,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:41:14,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:41:14,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:41:14,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:41:14,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:41:14,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:41:14,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:41:14,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:41:14,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:41:14,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:41:14,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:41:14,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:41:14,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:41:14,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:41:14,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:41:14,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:41:14,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:41:14,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:41:14,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:41:14,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:41:14,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:41:14,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:41:14,086 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:41:14,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:41:14,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:41:14,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:41:14,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:41:14,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:41:14,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:41:14,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:41:14,089 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:41:14,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:41:14,090 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:41:14,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:41:14,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:41:14,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:41:14,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:41:14,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:41:14,090 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:41:14,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:41:14,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:41:14,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:41:14,091 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:41:14,091 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:41:14,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:41:14,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:41:14,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:41:14,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:41:14,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:41:14,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:41:14,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:41:14,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:41:14,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:41:14,093 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:41:14,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:41:14,093 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:41:14,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:41:14,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:41:14,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:41:14,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:41:14,337 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:41:14,337 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:41:14,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-barrier.wvr.c [2023-08-30 05:41:15,336 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:41:15,522 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:41:15,522 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier.wvr.c [2023-08-30 05:41:15,528 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2653cc845/ca809e4c173a402c9aac8d45e2660105/FLAG58b034fe6 [2023-08-30 05:41:15,544 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2653cc845/ca809e4c173a402c9aac8d45e2660105 [2023-08-30 05:41:15,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:41:15,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:41:15,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:15,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:41:15,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:41:15,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bf531bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15, skipping insertion in model container [2023-08-30 05:41:15,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:41:15,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:41:15,750 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] [2023-08-30 05:41:15,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:15,764 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:41:15,804 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] [2023-08-30 05:41:15,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:41:15,819 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:41:15,823 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:41:15,828 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:41:15,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15 WrapperNode [2023-08-30 05:41:15,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:41:15,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:41:15,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:41:15,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:41:15,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,884 INFO L138 Inliner]: procedures = 25, calls = 98, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 265 [2023-08-30 05:41:15,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:41:15,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:41:15,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:41:15,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:41:15,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:41:15,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:41:15,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:41:15,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:41:15,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (1/1) ... [2023-08-30 05:41:15,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:41:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:41:15,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 05:41:15,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 05:41:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:41:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:41:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 05:41:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 05:41:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:41:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:41:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:41:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:41:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 05:41:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 05:41:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 05:41:16,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 05:41:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 05:41:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-30 05:41:16,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-30 05:41:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-30 05:41:16,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-30 05:41:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 05:41:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 05:41:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:41:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:41:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:41:16,004 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 05:41:16,072 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:41:16,074 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:41:16,363 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:41:16,414 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:41:16,415 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 05:41:16,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:41:16 BoogieIcfgContainer [2023-08-30 05:41:16,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:41:16,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:41:16,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:41:16,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:41:16,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:41:15" (1/3) ... [2023-08-30 05:41:16,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d2e052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:41:16, skipping insertion in model container [2023-08-30 05:41:16,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:41:15" (2/3) ... [2023-08-30 05:41:16,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d2e052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:41:16, skipping insertion in model container [2023-08-30 05:41:16,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:41:16" (3/3) ... [2023-08-30 05:41:16,422 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2023-08-30 05:41:16,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:41:16,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-30 05:41:16,434 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:41:16,525 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-30 05:41:16,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 268 transitions, 608 flow [2023-08-30 05:41:16,618 INFO L130 PetriNetUnfolder]: 8/236 cut-off events. [2023-08-30 05:41:16,618 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:41:16,629 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. [2023-08-30 05:41:16,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 268 transitions, 608 flow [2023-08-30 05:41:16,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 232 transitions, 512 flow [2023-08-30 05:41:16,635 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:41:16,641 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 232 transitions, 512 flow [2023-08-30 05:41:16,646 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 232 transitions, 512 flow [2023-08-30 05:41:16,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 232 transitions, 512 flow [2023-08-30 05:41:16,688 INFO L130 PetriNetUnfolder]: 8/232 cut-off events. [2023-08-30 05:41:16,689 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 05:41:16,690 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. [2023-08-30 05:41:16,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 10420 [2023-08-30 05:41:20,832 INFO L134 LiptonReduction]: Checked pairs total: 74898 [2023-08-30 05:41:20,833 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-30 05:41:20,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:41:20,851 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;@4b00adce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:41:20,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-08-30 05:41:20,853 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 05:41:20,853 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:41:20,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:20,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 05:41:20,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:20,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash 887, now seen corresponding path program 1 times [2023-08-30 05:41:20,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:20,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333220644] [2023-08-30 05:41:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:20,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:20,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:20,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333220644] [2023-08-30 05:41:20,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333220644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:20,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:20,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 05:41:20,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401802344] [2023-08-30 05:41:20,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:20,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 05:41:20,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:20,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 05:41:20,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 05:41:20,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 434 [2023-08-30 05:41:20,984 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) [2023-08-30 05:41:20,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:20,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 434 [2023-08-30 05:41:20,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:25,805 INFO L130 PetriNetUnfolder]: 39355/58012 cut-off events. [2023-08-30 05:41:25,806 INFO L131 PetriNetUnfolder]: For 5246/5246 co-relation queries the response was YES. [2023-08-30 05:41:25,943 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. [2023-08-30 05:41:26,347 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 50 selfloop transitions, 0 changer transitions 0/98 dead transitions. [2023-08-30 05:41:26,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 98 transitions, 344 flow [2023-08-30 05:41:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 05:41:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 05:41:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 533 transitions. [2023-08-30 05:41:26,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140552995391705 [2023-08-30 05:41:26,366 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 533 transitions. [2023-08-30 05:41:26,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 533 transitions. [2023-08-30 05:41:26,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:26,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 533 transitions. [2023-08-30 05:41:26,376 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) [2023-08-30 05:41:26,379 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) [2023-08-30 05:41:26,380 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) [2023-08-30 05:41:26,381 INFO L175 Difference]: Start difference. First operand has 116 places, 103 transitions, 254 flow. Second operand 2 states and 533 transitions. [2023-08-30 05:41:26,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 98 transitions, 344 flow [2023-08-30 05:41:26,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-30 05:41:26,603 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 212 flow [2023-08-30 05:41:26,604 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} [2023-08-30 05:41:26,606 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -14 predicate places. [2023-08-30 05:41:26,607 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 212 flow [2023-08-30 05:41:26,607 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) [2023-08-30 05:41:26,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:26,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:41:26,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 05:41:26,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:26,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash 840606292, now seen corresponding path program 1 times [2023-08-30 05:41:26,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:26,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239545860] [2023-08-30 05:41:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:26,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:26,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239545860] [2023-08-30 05:41:26,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239545860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:26,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:26,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:41:26,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765115619] [2023-08-30 05:41:26,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:26,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:26,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:26,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:26,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 434 [2023-08-30 05:41:26,809 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) [2023-08-30 05:41:26,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:26,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 434 [2023-08-30 05:41:26,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:30,635 INFO L130 PetriNetUnfolder]: 40594/60151 cut-off events. [2023-08-30 05:41:30,635 INFO L131 PetriNetUnfolder]: For 964/964 co-relation queries the response was YES. [2023-08-30 05:41:30,746 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. [2023-08-30 05:41:30,988 INFO L137 encePairwiseOnDemand]: 425/434 looper letters, 93 selfloop transitions, 7 changer transitions 0/146 dead transitions. [2023-08-30 05:41:30,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 146 transitions, 523 flow [2023-08-30 05:41:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 768 transitions. [2023-08-30 05:41:30,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898617511520737 [2023-08-30 05:41:30,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 768 transitions. [2023-08-30 05:41:30,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 768 transitions. [2023-08-30 05:41:30,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:30,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 768 transitions. [2023-08-30 05:41:30,993 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) [2023-08-30 05:41:30,995 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) [2023-08-30 05:41:30,996 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) [2023-08-30 05:41:30,996 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 212 flow. Second operand 3 states and 768 transitions. [2023-08-30 05:41:30,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 146 transitions, 523 flow [2023-08-30 05:41:30,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 146 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 05:41:31,000 INFO L231 Difference]: Finished difference. Result has 106 places, 104 transitions, 268 flow [2023-08-30 05:41:31,000 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} [2023-08-30 05:41:31,001 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2023-08-30 05:41:31,001 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 104 transitions, 268 flow [2023-08-30 05:41:31,001 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) [2023-08-30 05:41:31,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:31,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 05:41:31,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 05:41:31,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:31,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash 840606293, now seen corresponding path program 1 times [2023-08-30 05:41:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:31,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081040204] [2023-08-30 05:41:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:31,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:31,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:31,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081040204] [2023-08-30 05:41:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081040204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:31,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:41:31,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350360086] [2023-08-30 05:41:31,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:31,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:31,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:31,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 434 [2023-08-30 05:41:31,185 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) [2023-08-30 05:41:31,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:31,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 434 [2023-08-30 05:41:31,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:35,130 INFO L130 PetriNetUnfolder]: 40296/59709 cut-off events. [2023-08-30 05:41:35,130 INFO L131 PetriNetUnfolder]: For 2845/2853 co-relation queries the response was YES. [2023-08-30 05:41:35,233 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. [2023-08-30 05:41:35,473 INFO L137 encePairwiseOnDemand]: 431/434 looper letters, 53 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-08-30 05:41:35,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 372 flow [2023-08-30 05:41:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2023-08-30 05:41:35,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783410138248848 [2023-08-30 05:41:35,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2023-08-30 05:41:35,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2023-08-30 05:41:35,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:35,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2023-08-30 05:41:35,478 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) [2023-08-30 05:41:35,480 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) [2023-08-30 05:41:35,481 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) [2023-08-30 05:41:35,481 INFO L175 Difference]: Start difference. First operand has 106 places, 104 transitions, 268 flow. Second operand 3 states and 753 transitions. [2023-08-30 05:41:35,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 372 flow [2023-08-30 05:41:35,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:41:35,489 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 252 flow [2023-08-30 05:41:35,490 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} [2023-08-30 05:41:35,490 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -12 predicate places. [2023-08-30 05:41:35,490 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 252 flow [2023-08-30 05:41:35,491 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) [2023-08-30 05:41:35,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:35,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:41:35,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 05:41:35,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:35,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash 368815539, now seen corresponding path program 1 times [2023-08-30 05:41:35,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:35,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127951516] [2023-08-30 05:41:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:35,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:35,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:35,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127951516] [2023-08-30 05:41:35,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127951516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:35,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:35,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:41:35,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468410182] [2023-08-30 05:41:35,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:35,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:41:35,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:35,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:41:35,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:41:35,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 434 [2023-08-30 05:41:35,643 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) [2023-08-30 05:41:35,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:35,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 434 [2023-08-30 05:41:35,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:38,599 INFO L130 PetriNetUnfolder]: 31144/46627 cut-off events. [2023-08-30 05:41:38,599 INFO L131 PetriNetUnfolder]: For 1553/1553 co-relation queries the response was YES. [2023-08-30 05:41:38,688 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. [2023-08-30 05:41:38,895 INFO L137 encePairwiseOnDemand]: 427/434 looper letters, 95 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2023-08-30 05:41:38,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 593 flow [2023-08-30 05:41:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-30 05:41:38,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775729646697388 [2023-08-30 05:41:38,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-30 05:41:38,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-30 05:41:38,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:38,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-30 05:41:38,900 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) [2023-08-30 05:41:38,902 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) [2023-08-30 05:41:38,902 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) [2023-08-30 05:41:38,903 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 252 flow. Second operand 3 states and 752 transitions. [2023-08-30 05:41:38,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 593 flow [2023-08-30 05:41:38,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 592 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:41:38,908 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 339 flow [2023-08-30 05:41:38,908 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} [2023-08-30 05:41:38,909 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -9 predicate places. [2023-08-30 05:41:38,909 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 339 flow [2023-08-30 05:41:38,909 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) [2023-08-30 05:41:38,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:38,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:41:38,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 05:41:38,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:38,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash 368815538, now seen corresponding path program 1 times [2023-08-30 05:41:38,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:38,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626979373] [2023-08-30 05:41:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:38,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:38,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:38,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626979373] [2023-08-30 05:41:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626979373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:38,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:38,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:41:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966327164] [2023-08-30 05:41:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:38,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:38,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:39,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 434 [2023-08-30 05:41:39,036 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) [2023-08-30 05:41:39,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:39,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 434 [2023-08-30 05:41:39,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:40,860 INFO L130 PetriNetUnfolder]: 20447/30939 cut-off events. [2023-08-30 05:41:40,861 INFO L131 PetriNetUnfolder]: For 5225/5233 co-relation queries the response was YES. [2023-08-30 05:41:40,919 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. [2023-08-30 05:41:41,163 INFO L137 encePairwiseOnDemand]: 432/434 looper letters, 60 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-08-30 05:41:41,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 459 flow [2023-08-30 05:41:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-08-30 05:41:41,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768049155145929 [2023-08-30 05:41:41,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-08-30 05:41:41,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-08-30 05:41:41,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:41,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-08-30 05:41:41,168 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) [2023-08-30 05:41:41,169 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) [2023-08-30 05:41:41,170 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) [2023-08-30 05:41:41,170 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 339 flow. Second operand 3 states and 751 transitions. [2023-08-30 05:41:41,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 459 flow [2023-08-30 05:41:41,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 109 transitions, 439 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:41:41,179 INFO L231 Difference]: Finished difference. Result has 106 places, 109 transitions, 319 flow [2023-08-30 05:41:41,180 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} [2023-08-30 05:41:41,180 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2023-08-30 05:41:41,181 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 109 transitions, 319 flow [2023-08-30 05:41:41,181 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) [2023-08-30 05:41:41,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:41,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:41:41,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 05:41:41,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:41,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:41,182 INFO L85 PathProgramCache]: Analyzing trace with hash 158365259, now seen corresponding path program 1 times [2023-08-30 05:41:41,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:41,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447708898] [2023-08-30 05:41:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:41,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:41,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447708898] [2023-08-30 05:41:41,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447708898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:41,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:41,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:41:41,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332294108] [2023-08-30 05:41:41,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:41,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:41:41,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:41,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:41:41,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:41:41,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 434 [2023-08-30 05:41:41,353 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) [2023-08-30 05:41:41,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:41,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 434 [2023-08-30 05:41:41,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:42,898 INFO L130 PetriNetUnfolder]: 14391/24168 cut-off events. [2023-08-30 05:41:42,899 INFO L131 PetriNetUnfolder]: For 4204/4204 co-relation queries the response was YES. [2023-08-30 05:41:42,978 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. [2023-08-30 05:41:43,071 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 118 selfloop transitions, 13 changer transitions 0/175 dead transitions. [2023-08-30 05:41:43,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 175 transitions, 787 flow [2023-08-30 05:41:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:41:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:41:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1001 transitions. [2023-08-30 05:41:43,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5766129032258065 [2023-08-30 05:41:43,074 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1001 transitions. [2023-08-30 05:41:43,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1001 transitions. [2023-08-30 05:41:43,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:43,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1001 transitions. [2023-08-30 05:41:43,077 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) [2023-08-30 05:41:43,079 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) [2023-08-30 05:41:43,080 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) [2023-08-30 05:41:43,080 INFO L175 Difference]: Start difference. First operand has 106 places, 109 transitions, 319 flow. Second operand 4 states and 1001 transitions. [2023-08-30 05:41:43,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 175 transitions, 787 flow [2023-08-30 05:41:43,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 786 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:41:43,085 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 413 flow [2023-08-30 05:41:43,085 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} [2023-08-30 05:41:43,086 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -8 predicate places. [2023-08-30 05:41:43,086 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 413 flow [2023-08-30 05:41:43,087 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) [2023-08-30 05:41:43,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:43,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:41:43,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 05:41:43,087 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:43,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash 653618012, now seen corresponding path program 1 times [2023-08-30 05:41:43,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:43,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261078121] [2023-08-30 05:41:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:43,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:43,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:43,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261078121] [2023-08-30 05:41:43,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261078121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:43,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:43,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:41:43,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657298829] [2023-08-30 05:41:43,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:43,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:43,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:43,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:43,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:43,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 434 [2023-08-30 05:41:43,192 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) [2023-08-30 05:41:43,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:43,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 434 [2023-08-30 05:41:43,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:44,960 INFO L130 PetriNetUnfolder]: 13079/22193 cut-off events. [2023-08-30 05:41:44,960 INFO L131 PetriNetUnfolder]: For 8967/8979 co-relation queries the response was YES. [2023-08-30 05:41:45,056 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. [2023-08-30 05:41:45,166 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 103 selfloop transitions, 13 changer transitions 0/161 dead transitions. [2023-08-30 05:41:45,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 161 transitions, 820 flow [2023-08-30 05:41:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-08-30 05:41:45,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837173579109063 [2023-08-30 05:41:45,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-08-30 05:41:45,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-08-30 05:41:45,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:45,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-08-30 05:41:45,188 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) [2023-08-30 05:41:45,190 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) [2023-08-30 05:41:45,201 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) [2023-08-30 05:41:45,202 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 413 flow. Second operand 3 states and 760 transitions. [2023-08-30 05:41:45,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 161 transitions, 820 flow [2023-08-30 05:41:45,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 161 transitions, 811 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:41:45,208 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 558 flow [2023-08-30 05:41:45,208 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} [2023-08-30 05:41:45,209 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -5 predicate places. [2023-08-30 05:41:45,209 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 558 flow [2023-08-30 05:41:45,209 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) [2023-08-30 05:41:45,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:45,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:41:45,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 05:41:45,210 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:45,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:45,211 INFO L85 PathProgramCache]: Analyzing trace with hash 653618013, now seen corresponding path program 1 times [2023-08-30 05:41:45,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:45,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742570850] [2023-08-30 05:41:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:45,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:45,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742570850] [2023-08-30 05:41:45,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742570850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:45,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:45,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:41:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367093956] [2023-08-30 05:41:45,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:45,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:41:45,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:41:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:41:45,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 434 [2023-08-30 05:41:45,538 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) [2023-08-30 05:41:45,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:45,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 434 [2023-08-30 05:41:45,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:47,050 INFO L130 PetriNetUnfolder]: 10228/18402 cut-off events. [2023-08-30 05:41:47,050 INFO L131 PetriNetUnfolder]: For 12107/12123 co-relation queries the response was YES. [2023-08-30 05:41:47,102 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. [2023-08-30 05:41:47,169 INFO L137 encePairwiseOnDemand]: 425/434 looper letters, 123 selfloop transitions, 19 changer transitions 0/186 dead transitions. [2023-08-30 05:41:47,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 186 transitions, 1058 flow [2023-08-30 05:41:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:41:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:41:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 998 transitions. [2023-08-30 05:41:47,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748847926267281 [2023-08-30 05:41:47,172 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 998 transitions. [2023-08-30 05:41:47,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 998 transitions. [2023-08-30 05:41:47,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:47,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 998 transitions. [2023-08-30 05:41:47,175 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) [2023-08-30 05:41:47,178 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) [2023-08-30 05:41:47,178 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) [2023-08-30 05:41:47,178 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 558 flow. Second operand 4 states and 998 transitions. [2023-08-30 05:41:47,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 186 transitions, 1058 flow [2023-08-30 05:41:47,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 186 transitions, 1032 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:41:47,191 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 566 flow [2023-08-30 05:41:47,192 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} [2023-08-30 05:41:47,192 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-08-30 05:41:47,192 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 566 flow [2023-08-30 05:41:47,193 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) [2023-08-30 05:41:47,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:47,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:41:47,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 05:41:47,194 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:47,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:47,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1434929811, now seen corresponding path program 1 times [2023-08-30 05:41:47,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:47,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986242718] [2023-08-30 05:41:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:47,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:47,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986242718] [2023-08-30 05:41:47,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986242718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:47,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:47,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:41:47,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975853746] [2023-08-30 05:41:47,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:47,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:47,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:47,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:47,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 434 [2023-08-30 05:41:47,309 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) [2023-08-30 05:41:47,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:47,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 434 [2023-08-30 05:41:47,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:48,793 INFO L130 PetriNetUnfolder]: 12048/21014 cut-off events. [2023-08-30 05:41:48,794 INFO L131 PetriNetUnfolder]: For 16571/16601 co-relation queries the response was YES. [2023-08-30 05:41:48,866 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. [2023-08-30 05:41:48,952 INFO L137 encePairwiseOnDemand]: 425/434 looper letters, 106 selfloop transitions, 15 changer transitions 0/165 dead transitions. [2023-08-30 05:41:48,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 979 flow [2023-08-30 05:41:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 758 transitions. [2023-08-30 05:41:48,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821812596006144 [2023-08-30 05:41:48,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 758 transitions. [2023-08-30 05:41:48,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 758 transitions. [2023-08-30 05:41:48,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:48,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 758 transitions. [2023-08-30 05:41:48,958 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) [2023-08-30 05:41:48,959 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) [2023-08-30 05:41:48,960 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) [2023-08-30 05:41:48,960 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 566 flow. Second operand 3 states and 758 transitions. [2023-08-30 05:41:48,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 979 flow [2023-08-30 05:41:48,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 954 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:41:48,992 INFO L231 Difference]: Finished difference. Result has 112 places, 132 transitions, 701 flow [2023-08-30 05:41:48,992 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} [2023-08-30 05:41:48,993 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -4 predicate places. [2023-08-30 05:41:48,993 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 132 transitions, 701 flow [2023-08-30 05:41:48,993 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) [2023-08-30 05:41:48,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:48,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:41:48,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 05:41:48,994 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:48,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:48,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1434929812, now seen corresponding path program 1 times [2023-08-30 05:41:48,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:48,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021920113] [2023-08-30 05:41:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:48,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:49,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021920113] [2023-08-30 05:41:49,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021920113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:49,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:49,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:41:49,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678972735] [2023-08-30 05:41:49,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:49,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:49,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:49,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 434 [2023-08-30 05:41:49,101 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) [2023-08-30 05:41:49,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:49,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 434 [2023-08-30 05:41:49,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:50,607 INFO L130 PetriNetUnfolder]: 10682/18786 cut-off events. [2023-08-30 05:41:50,608 INFO L131 PetriNetUnfolder]: For 19657/19807 co-relation queries the response was YES. [2023-08-30 05:41:50,675 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. [2023-08-30 05:41:50,751 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 103 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2023-08-30 05:41:50,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 161 transitions, 1087 flow [2023-08-30 05:41:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2023-08-30 05:41:50,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944700460829493 [2023-08-30 05:41:50,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2023-08-30 05:41:50,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2023-08-30 05:41:50,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:50,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2023-08-30 05:41:50,757 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) [2023-08-30 05:41:50,758 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) [2023-08-30 05:41:50,759 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) [2023-08-30 05:41:50,759 INFO L175 Difference]: Start difference. First operand has 112 places, 132 transitions, 701 flow. Second operand 3 states and 774 transitions. [2023-08-30 05:41:50,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 161 transitions, 1087 flow [2023-08-30 05:41:50,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1057 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:41:50,779 INFO L231 Difference]: Finished difference. Result has 110 places, 130 transitions, 687 flow [2023-08-30 05:41:50,779 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} [2023-08-30 05:41:50,780 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-08-30 05:41:50,780 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 130 transitions, 687 flow [2023-08-30 05:41:50,781 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) [2023-08-30 05:41:50,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:50,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:41:50,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 05:41:50,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:50,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:50,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1903633977, now seen corresponding path program 1 times [2023-08-30 05:41:50,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:50,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609045447] [2023-08-30 05:41:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:50,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:50,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:50,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609045447] [2023-08-30 05:41:50,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609045447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:50,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:50,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:41:50,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969619427] [2023-08-30 05:41:50,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:50,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:50,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:50,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 434 [2023-08-30 05:41:50,907 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) [2023-08-30 05:41:50,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:50,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 434 [2023-08-30 05:41:50,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:52,011 INFO L130 PetriNetUnfolder]: 10686/18645 cut-off events. [2023-08-30 05:41:52,012 INFO L131 PetriNetUnfolder]: For 18978/19110 co-relation queries the response was YES. [2023-08-30 05:41:52,084 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. [2023-08-30 05:41:52,151 INFO L137 encePairwiseOnDemand]: 430/434 looper letters, 108 selfloop transitions, 11 changer transitions 0/165 dead transitions. [2023-08-30 05:41:52,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 165 transitions, 1159 flow [2023-08-30 05:41:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2023-08-30 05:41:52,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960061443932412 [2023-08-30 05:41:52,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2023-08-30 05:41:52,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2023-08-30 05:41:52,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:52,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2023-08-30 05:41:52,155 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) [2023-08-30 05:41:52,156 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) [2023-08-30 05:41:52,156 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) [2023-08-30 05:41:52,156 INFO L175 Difference]: Start difference. First operand has 110 places, 130 transitions, 687 flow. Second operand 3 states and 776 transitions. [2023-08-30 05:41:52,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 165 transitions, 1159 flow [2023-08-30 05:41:52,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1123 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:41:52,169 INFO L231 Difference]: Finished difference. Result has 108 places, 128 transitions, 685 flow [2023-08-30 05:41:52,169 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} [2023-08-30 05:41:52,170 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -8 predicate places. [2023-08-30 05:41:52,170 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 128 transitions, 685 flow [2023-08-30 05:41:52,170 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) [2023-08-30 05:41:52,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:52,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:41:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 05:41:52,171 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:52,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1903633978, now seen corresponding path program 1 times [2023-08-30 05:41:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670274869] [2023-08-30 05:41:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:52,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:52,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670274869] [2023-08-30 05:41:52,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670274869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:52,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:52,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:41:52,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830060248] [2023-08-30 05:41:52,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:52,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:41:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:41:52,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:41:52,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 434 [2023-08-30 05:41:52,260 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) [2023-08-30 05:41:52,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:52,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 434 [2023-08-30 05:41:52,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:53,656 INFO L130 PetriNetUnfolder]: 13710/22386 cut-off events. [2023-08-30 05:41:53,657 INFO L131 PetriNetUnfolder]: For 24894/25056 co-relation queries the response was YES. [2023-08-30 05:41:53,719 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. [2023-08-30 05:41:53,788 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 115 selfloop transitions, 20 changer transitions 0/177 dead transitions. [2023-08-30 05:41:53,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 177 transitions, 1180 flow [2023-08-30 05:41:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:41:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:41:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-08-30 05:41:53,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837173579109063 [2023-08-30 05:41:53,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-08-30 05:41:53,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-08-30 05:41:53,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:53,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-08-30 05:41:53,791 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) [2023-08-30 05:41:53,793 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) [2023-08-30 05:41:53,793 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) [2023-08-30 05:41:53,793 INFO L175 Difference]: Start difference. First operand has 108 places, 128 transitions, 685 flow. Second operand 3 states and 760 transitions. [2023-08-30 05:41:53,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 177 transitions, 1180 flow [2023-08-30 05:41:53,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 177 transitions, 1158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:41:53,802 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 890 flow [2023-08-30 05:41:53,802 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} [2023-08-30 05:41:53,803 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-08-30 05:41:53,803 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 890 flow [2023-08-30 05:41:53,803 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) [2023-08-30 05:41:53,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:53,803 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] [2023-08-30 05:41:53,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 05:41:53,804 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:53,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:53,804 INFO L85 PathProgramCache]: Analyzing trace with hash -945684417, now seen corresponding path program 1 times [2023-08-30 05:41:53,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:53,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493994811] [2023-08-30 05:41:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:53,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:54,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:54,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493994811] [2023-08-30 05:41:54,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493994811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:54,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:54,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 05:41:54,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599675266] [2023-08-30 05:41:54,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:54,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:41:54,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:54,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:41:54,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:41:54,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 434 [2023-08-30 05:41:54,147 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) [2023-08-30 05:41:54,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:54,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 434 [2023-08-30 05:41:54,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:55,928 INFO L130 PetriNetUnfolder]: 12263/20716 cut-off events. [2023-08-30 05:41:55,928 INFO L131 PetriNetUnfolder]: For 27952/28208 co-relation queries the response was YES. [2023-08-30 05:41:55,980 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. [2023-08-30 05:41:56,042 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 134 selfloop transitions, 36 changer transitions 0/213 dead transitions. [2023-08-30 05:41:56,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 213 transitions, 1542 flow [2023-08-30 05:41:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:41:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:41:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 988 transitions. [2023-08-30 05:41:56,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691244239631337 [2023-08-30 05:41:56,044 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 988 transitions. [2023-08-30 05:41:56,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 988 transitions. [2023-08-30 05:41:56,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:56,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 988 transitions. [2023-08-30 05:41:56,046 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) [2023-08-30 05:41:56,047 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) [2023-08-30 05:41:56,048 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) [2023-08-30 05:41:56,048 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 890 flow. Second operand 4 states and 988 transitions. [2023-08-30 05:41:56,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 213 transitions, 1542 flow [2023-08-30 05:41:56,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 213 transitions, 1486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:41:56,058 INFO L231 Difference]: Finished difference. Result has 114 places, 153 transitions, 1134 flow [2023-08-30 05:41:56,058 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} [2023-08-30 05:41:56,059 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -2 predicate places. [2023-08-30 05:41:56,059 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 153 transitions, 1134 flow [2023-08-30 05:41:56,059 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) [2023-08-30 05:41:56,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:56,059 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] [2023-08-30 05:41:56,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 05:41:56,060 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:56,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash -293255352, now seen corresponding path program 1 times [2023-08-30 05:41:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:56,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682379075] [2023-08-30 05:41:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682379075] [2023-08-30 05:41:56,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682379075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:56,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:56,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:41:56,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503211187] [2023-08-30 05:41:56,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:56,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:41:56,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:41:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:41:56,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 434 [2023-08-30 05:41:56,179 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) [2023-08-30 05:41:56,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:56,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 434 [2023-08-30 05:41:56,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:41:57,827 INFO L130 PetriNetUnfolder]: 11362/18840 cut-off events. [2023-08-30 05:41:57,828 INFO L131 PetriNetUnfolder]: For 34235/34483 co-relation queries the response was YES. [2023-08-30 05:41:57,893 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. [2023-08-30 05:41:57,966 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 157 selfloop transitions, 4 changer transitions 0/210 dead transitions. [2023-08-30 05:41:57,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 210 transitions, 1788 flow [2023-08-30 05:41:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:41:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:41:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1030 transitions. [2023-08-30 05:41:57,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933179723502304 [2023-08-30 05:41:57,970 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1030 transitions. [2023-08-30 05:41:57,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1030 transitions. [2023-08-30 05:41:57,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:41:57,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1030 transitions. [2023-08-30 05:41:57,973 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) [2023-08-30 05:41:57,975 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) [2023-08-30 05:41:57,976 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) [2023-08-30 05:41:57,976 INFO L175 Difference]: Start difference. First operand has 114 places, 153 transitions, 1134 flow. Second operand 4 states and 1030 transitions. [2023-08-30 05:41:57,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 210 transitions, 1788 flow [2023-08-30 05:41:58,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 210 transitions, 1782 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 05:41:58,015 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1140 flow [2023-08-30 05:41:58,015 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} [2023-08-30 05:41:58,015 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 2 predicate places. [2023-08-30 05:41:58,016 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1140 flow [2023-08-30 05:41:58,016 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) [2023-08-30 05:41:58,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:41:58,016 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] [2023-08-30 05:41:58,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 05:41:58,017 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:41:58,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:41:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash 74643931, now seen corresponding path program 1 times [2023-08-30 05:41:58,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:41:58,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661455662] [2023-08-30 05:41:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:41:58,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:41:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:41:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:41:58,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:41:58,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661455662] [2023-08-30 05:41:58,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661455662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:41:58,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:41:58,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:41:58,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832931474] [2023-08-30 05:41:58,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:41:58,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:41:58,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:41:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:41:58,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:41:58,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 434 [2023-08-30 05:41:58,286 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) [2023-08-30 05:41:58,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:41:58,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 434 [2023-08-30 05:41:58,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:00,080 INFO L130 PetriNetUnfolder]: 10745/17736 cut-off events. [2023-08-30 05:42:00,080 INFO L131 PetriNetUnfolder]: For 34188/34404 co-relation queries the response was YES. [2023-08-30 05:42:00,134 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. [2023-08-30 05:42:00,197 INFO L137 encePairwiseOnDemand]: 424/434 looper letters, 129 selfloop transitions, 43 changer transitions 0/213 dead transitions. [2023-08-30 05:42:00,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 213 transitions, 1672 flow [2023-08-30 05:42:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:42:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:42:00,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1188 transitions. [2023-08-30 05:42:00,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474654377880185 [2023-08-30 05:42:00,200 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1188 transitions. [2023-08-30 05:42:00,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1188 transitions. [2023-08-30 05:42:00,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:00,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1188 transitions. [2023-08-30 05:42:00,203 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) [2023-08-30 05:42:00,206 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) [2023-08-30 05:42:00,206 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) [2023-08-30 05:42:00,206 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1140 flow. Second operand 5 states and 1188 transitions. [2023-08-30 05:42:00,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 213 transitions, 1672 flow [2023-08-30 05:42:00,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 213 transitions, 1658 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:00,231 INFO L231 Difference]: Finished difference. Result has 121 places, 155 transitions, 1297 flow [2023-08-30 05:42:00,231 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} [2023-08-30 05:42:00,232 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 5 predicate places. [2023-08-30 05:42:00,232 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 155 transitions, 1297 flow [2023-08-30 05:42:00,232 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) [2023-08-30 05:42:00,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:00,233 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] [2023-08-30 05:42:00,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 05:42:00,233 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:00,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -836730111, now seen corresponding path program 1 times [2023-08-30 05:42:00,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:00,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820254987] [2023-08-30 05:42:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:00,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:00,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820254987] [2023-08-30 05:42:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820254987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:00,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:00,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:42:00,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554043998] [2023-08-30 05:42:00,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:00,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:42:00,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:00,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:42:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:42:00,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 434 [2023-08-30 05:42:00,643 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) [2023-08-30 05:42:00,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:00,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 434 [2023-08-30 05:42:00,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:01,905 INFO L130 PetriNetUnfolder]: 10269/17039 cut-off events. [2023-08-30 05:42:01,905 INFO L131 PetriNetUnfolder]: For 40911/41045 co-relation queries the response was YES. [2023-08-30 05:42:01,957 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. [2023-08-30 05:42:02,009 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 167 selfloop transitions, 54 changer transitions 2/269 dead transitions. [2023-08-30 05:42:02,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 269 transitions, 2199 flow [2023-08-30 05:42:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:42:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:42:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1449 transitions. [2023-08-30 05:42:02,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2023-08-30 05:42:02,012 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1449 transitions. [2023-08-30 05:42:02,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1449 transitions. [2023-08-30 05:42:02,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:02,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1449 transitions. [2023-08-30 05:42:02,014 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) [2023-08-30 05:42:02,016 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) [2023-08-30 05:42:02,018 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) [2023-08-30 05:42:02,018 INFO L175 Difference]: Start difference. First operand has 121 places, 155 transitions, 1297 flow. Second operand 6 states and 1449 transitions. [2023-08-30 05:42:02,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 269 transitions, 2199 flow [2023-08-30 05:42:02,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 269 transitions, 2160 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:02,050 INFO L231 Difference]: Finished difference. Result has 129 places, 169 transitions, 1626 flow [2023-08-30 05:42:02,050 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} [2023-08-30 05:42:02,050 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 13 predicate places. [2023-08-30 05:42:02,050 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 169 transitions, 1626 flow [2023-08-30 05:42:02,051 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) [2023-08-30 05:42:02,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:02,051 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] [2023-08-30 05:42:02,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 05:42:02,051 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:02,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash -150664238, now seen corresponding path program 1 times [2023-08-30 05:42:02,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:02,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511994690] [2023-08-30 05:42:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:02,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:02,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511994690] [2023-08-30 05:42:02,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511994690] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:02,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:02,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:42:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134620589] [2023-08-30 05:42:02,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:02,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:42:02,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:42:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:42:02,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 434 [2023-08-30 05:42:02,303 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) [2023-08-30 05:42:02,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:02,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 434 [2023-08-30 05:42:02,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:03,863 INFO L130 PetriNetUnfolder]: 10412/17849 cut-off events. [2023-08-30 05:42:03,863 INFO L131 PetriNetUnfolder]: For 52071/52296 co-relation queries the response was YES. [2023-08-30 05:42:03,967 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. [2023-08-30 05:42:04,037 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 186 selfloop transitions, 65 changer transitions 1/301 dead transitions. [2023-08-30 05:42:04,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 301 transitions, 2908 flow [2023-08-30 05:42:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:42:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:42:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1450 transitions. [2023-08-30 05:42:04,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568356374807988 [2023-08-30 05:42:04,040 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1450 transitions. [2023-08-30 05:42:04,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1450 transitions. [2023-08-30 05:42:04,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:04,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1450 transitions. [2023-08-30 05:42:04,044 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) [2023-08-30 05:42:04,046 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) [2023-08-30 05:42:04,047 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) [2023-08-30 05:42:04,047 INFO L175 Difference]: Start difference. First operand has 129 places, 169 transitions, 1626 flow. Second operand 6 states and 1450 transitions. [2023-08-30 05:42:04,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 301 transitions, 2908 flow [2023-08-30 05:42:04,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 301 transitions, 2863 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:04,132 INFO L231 Difference]: Finished difference. Result has 137 places, 197 transitions, 2284 flow [2023-08-30 05:42:04,132 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} [2023-08-30 05:42:04,132 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 21 predicate places. [2023-08-30 05:42:04,132 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 197 transitions, 2284 flow [2023-08-30 05:42:04,133 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) [2023-08-30 05:42:04,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:04,133 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] [2023-08-30 05:42:04,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 05:42:04,133 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:04,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1772113238, now seen corresponding path program 1 times [2023-08-30 05:42:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:04,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046156916] [2023-08-30 05:42:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:04,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:04,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:04,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046156916] [2023-08-30 05:42:04,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046156916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:04,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:04,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 05:42:04,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576445256] [2023-08-30 05:42:04,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:04,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:04,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:04,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:04,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 434 [2023-08-30 05:42:04,568 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) [2023-08-30 05:42:04,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:04,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 434 [2023-08-30 05:42:04,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:06,159 INFO L130 PetriNetUnfolder]: 10258/17476 cut-off events. [2023-08-30 05:42:06,159 INFO L131 PetriNetUnfolder]: For 63357/63505 co-relation queries the response was YES. [2023-08-30 05:42:06,236 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. [2023-08-30 05:42:06,299 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 159 selfloop transitions, 85 changer transitions 1/292 dead transitions. [2023-08-30 05:42:06,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 292 transitions, 3206 flow [2023-08-30 05:42:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:42:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:42:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1835 transitions. [2023-08-30 05:42:06,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285138248847926 [2023-08-30 05:42:06,302 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1835 transitions. [2023-08-30 05:42:06,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1835 transitions. [2023-08-30 05:42:06,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:06,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1835 transitions. [2023-08-30 05:42:06,305 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) [2023-08-30 05:42:06,308 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) [2023-08-30 05:42:06,308 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) [2023-08-30 05:42:06,308 INFO L175 Difference]: Start difference. First operand has 137 places, 197 transitions, 2284 flow. Second operand 8 states and 1835 transitions. [2023-08-30 05:42:06,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 292 transitions, 3206 flow [2023-08-30 05:42:06,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 292 transitions, 3198 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 05:42:06,551 INFO L231 Difference]: Finished difference. Result has 148 places, 209 transitions, 2764 flow [2023-08-30 05:42:06,551 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} [2023-08-30 05:42:06,551 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 32 predicate places. [2023-08-30 05:42:06,552 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 2764 flow [2023-08-30 05:42:06,552 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) [2023-08-30 05:42:06,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:06,552 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] [2023-08-30 05:42:06,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 05:42:06,553 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:06,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash -375622696, now seen corresponding path program 1 times [2023-08-30 05:42:06,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:06,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333748588] [2023-08-30 05:42:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:06,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:06,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:06,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333748588] [2023-08-30 05:42:06,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333748588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:06,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:06,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:42:06,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233426833] [2023-08-30 05:42:06,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:06,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:42:06,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:06,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:42:06,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:42:06,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 434 [2023-08-30 05:42:06,854 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) [2023-08-30 05:42:06,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:06,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 434 [2023-08-30 05:42:06,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:08,963 INFO L130 PetriNetUnfolder]: 10575/18352 cut-off events. [2023-08-30 05:42:08,963 INFO L131 PetriNetUnfolder]: For 89448/89649 co-relation queries the response was YES. [2023-08-30 05:42:09,042 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. [2023-08-30 05:42:09,104 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 191 selfloop transitions, 94 changer transitions 5/340 dead transitions. [2023-08-30 05:42:09,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 340 transitions, 4112 flow [2023-08-30 05:42:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:42:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:42:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2069 transitions. [2023-08-30 05:42:09,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296979006656426 [2023-08-30 05:42:09,108 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2069 transitions. [2023-08-30 05:42:09,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2069 transitions. [2023-08-30 05:42:09,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:09,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2069 transitions. [2023-08-30 05:42:09,111 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) [2023-08-30 05:42:09,114 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) [2023-08-30 05:42:09,115 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) [2023-08-30 05:42:09,115 INFO L175 Difference]: Start difference. First operand has 148 places, 209 transitions, 2764 flow. Second operand 9 states and 2069 transitions. [2023-08-30 05:42:09,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 340 transitions, 4112 flow [2023-08-30 05:42:09,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 340 transitions, 4029 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-30 05:42:09,305 INFO L231 Difference]: Finished difference. Result has 157 places, 226 transitions, 3362 flow [2023-08-30 05:42:09,305 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} [2023-08-30 05:42:09,305 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 41 predicate places. [2023-08-30 05:42:09,306 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 226 transitions, 3362 flow [2023-08-30 05:42:09,306 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) [2023-08-30 05:42:09,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:09,306 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] [2023-08-30 05:42:09,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 05:42:09,306 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:09,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:09,307 INFO L85 PathProgramCache]: Analyzing trace with hash -986500360, now seen corresponding path program 1 times [2023-08-30 05:42:09,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:09,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412335314] [2023-08-30 05:42:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:09,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:09,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:09,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412335314] [2023-08-30 05:42:09,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412335314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:09,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:09,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:42:09,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58154937] [2023-08-30 05:42:09,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:09,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:42:09,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:09,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:42:09,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:42:09,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 434 [2023-08-30 05:42:09,552 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) [2023-08-30 05:42:09,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:09,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 434 [2023-08-30 05:42:09,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:11,390 INFO L130 PetriNetUnfolder]: 10700/18863 cut-off events. [2023-08-30 05:42:11,390 INFO L131 PetriNetUnfolder]: For 108850/108960 co-relation queries the response was YES. [2023-08-30 05:42:11,464 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. [2023-08-30 05:42:11,521 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 187 selfloop transitions, 93 changer transitions 0/324 dead transitions. [2023-08-30 05:42:11,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 324 transitions, 4473 flow [2023-08-30 05:42:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:42:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:42:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1450 transitions. [2023-08-30 05:42:11,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568356374807988 [2023-08-30 05:42:11,524 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1450 transitions. [2023-08-30 05:42:11,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1450 transitions. [2023-08-30 05:42:11,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:11,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1450 transitions. [2023-08-30 05:42:11,526 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) [2023-08-30 05:42:11,528 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) [2023-08-30 05:42:11,528 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) [2023-08-30 05:42:11,528 INFO L175 Difference]: Start difference. First operand has 157 places, 226 transitions, 3362 flow. Second operand 6 states and 1450 transitions. [2023-08-30 05:42:11,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 324 transitions, 4473 flow [2023-08-30 05:42:11,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 324 transitions, 4404 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-30 05:42:11,715 INFO L231 Difference]: Finished difference. Result has 162 places, 238 transitions, 3866 flow [2023-08-30 05:42:11,715 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} [2023-08-30 05:42:11,716 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 46 predicate places. [2023-08-30 05:42:11,716 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 238 transitions, 3866 flow [2023-08-30 05:42:11,717 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) [2023-08-30 05:42:11,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:11,717 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] [2023-08-30 05:42:11,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 05:42:11,717 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:11,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash 598141091, now seen corresponding path program 1 times [2023-08-30 05:42:11,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:11,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119202242] [2023-08-30 05:42:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:11,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:11,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:11,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119202242] [2023-08-30 05:42:11,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119202242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:11,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:11,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 05:42:11,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004006268] [2023-08-30 05:42:11,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:11,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:42:11,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:11,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:42:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:42:12,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-30 05:42:12,034 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) [2023-08-30 05:42:12,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:12,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-30 05:42:12,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:15,914 INFO L130 PetriNetUnfolder]: 19499/32604 cut-off events. [2023-08-30 05:42:15,915 INFO L131 PetriNetUnfolder]: For 203362/203510 co-relation queries the response was YES. [2023-08-30 05:42:16,179 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. [2023-08-30 05:42:16,341 INFO L137 encePairwiseOnDemand]: 417/434 looper letters, 282 selfloop transitions, 129 changer transitions 0/447 dead transitions. [2023-08-30 05:42:16,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 447 transitions, 6579 flow [2023-08-30 05:42:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:42:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:42:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2123 transitions. [2023-08-30 05:42:16,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435227854582694 [2023-08-30 05:42:16,347 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2123 transitions. [2023-08-30 05:42:16,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2123 transitions. [2023-08-30 05:42:16,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:16,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2123 transitions. [2023-08-30 05:42:16,351 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) [2023-08-30 05:42:16,354 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) [2023-08-30 05:42:16,355 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) [2023-08-30 05:42:16,355 INFO L175 Difference]: Start difference. First operand has 162 places, 238 transitions, 3866 flow. Second operand 9 states and 2123 transitions. [2023-08-30 05:42:16,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 447 transitions, 6579 flow [2023-08-30 05:42:17,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 447 transitions, 6501 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-08-30 05:42:17,387 INFO L231 Difference]: Finished difference. Result has 175 places, 295 transitions, 5706 flow [2023-08-30 05:42:17,387 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} [2023-08-30 05:42:17,387 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 59 predicate places. [2023-08-30 05:42:17,387 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 295 transitions, 5706 flow [2023-08-30 05:42:17,388 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) [2023-08-30 05:42:17,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:17,388 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] [2023-08-30 05:42:17,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 05:42:17,388 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:17,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1645307768, now seen corresponding path program 1 times [2023-08-30 05:42:17,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:17,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755094625] [2023-08-30 05:42:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:17,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:17,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:17,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755094625] [2023-08-30 05:42:17,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755094625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:17,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:17,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:42:17,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444504157] [2023-08-30 05:42:17,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:17,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:17,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:17,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:17,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:17,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-30 05:42:17,761 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) [2023-08-30 05:42:17,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:17,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-30 05:42:17,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:22,509 INFO L130 PetriNetUnfolder]: 20732/35165 cut-off events. [2023-08-30 05:42:22,509 INFO L131 PetriNetUnfolder]: For 275561/275641 co-relation queries the response was YES. [2023-08-30 05:42:22,876 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. [2023-08-30 05:42:23,040 INFO L137 encePairwiseOnDemand]: 415/434 looper letters, 347 selfloop transitions, 200 changer transitions 0/583 dead transitions. [2023-08-30 05:42:23,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 583 transitions, 9029 flow [2023-08-30 05:42:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 05:42:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 05:42:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3271 transitions. [2023-08-30 05:42:23,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5383475971033574 [2023-08-30 05:42:23,045 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3271 transitions. [2023-08-30 05:42:23,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3271 transitions. [2023-08-30 05:42:23,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:23,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3271 transitions. [2023-08-30 05:42:23,050 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) [2023-08-30 05:42:23,054 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) [2023-08-30 05:42:23,055 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) [2023-08-30 05:42:23,055 INFO L175 Difference]: Start difference. First operand has 175 places, 295 transitions, 5706 flow. Second operand 14 states and 3271 transitions. [2023-08-30 05:42:23,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 583 transitions, 9029 flow [2023-08-30 05:42:24,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 583 transitions, 9015 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 05:42:24,559 INFO L231 Difference]: Finished difference. Result has 194 places, 353 transitions, 7627 flow [2023-08-30 05:42:24,559 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} [2023-08-30 05:42:24,559 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 78 predicate places. [2023-08-30 05:42:24,560 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 353 transitions, 7627 flow [2023-08-30 05:42:24,560 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) [2023-08-30 05:42:24,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:24,560 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] [2023-08-30 05:42:24,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 05:42:24,561 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:24,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1644429296, now seen corresponding path program 1 times [2023-08-30 05:42:24,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:24,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564167031] [2023-08-30 05:42:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:24,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:24,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:24,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564167031] [2023-08-30 05:42:24,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564167031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:24,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:24,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:42:24,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172125079] [2023-08-30 05:42:24,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:24,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:42:24,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:42:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:42:24,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 434 [2023-08-30 05:42:24,864 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) [2023-08-30 05:42:24,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:24,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 434 [2023-08-30 05:42:24,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:32,923 INFO L130 PetriNetUnfolder]: 31019/52251 cut-off events. [2023-08-30 05:42:32,923 INFO L131 PetriNetUnfolder]: For 425657/425985 co-relation queries the response was YES. [2023-08-30 05:42:33,411 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. [2023-08-30 05:42:33,763 INFO L137 encePairwiseOnDemand]: 424/434 looper letters, 348 selfloop transitions, 107 changer transitions 0/517 dead transitions. [2023-08-30 05:42:33,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 517 transitions, 10467 flow [2023-08-30 05:42:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:42:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:42:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1461 transitions. [2023-08-30 05:42:33,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610599078341014 [2023-08-30 05:42:33,765 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1461 transitions. [2023-08-30 05:42:33,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1461 transitions. [2023-08-30 05:42:33,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:33,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1461 transitions. [2023-08-30 05:42:33,767 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) [2023-08-30 05:42:33,769 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) [2023-08-30 05:42:33,769 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) [2023-08-30 05:42:33,769 INFO L175 Difference]: Start difference. First operand has 194 places, 353 transitions, 7627 flow. Second operand 6 states and 1461 transitions. [2023-08-30 05:42:33,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 517 transitions, 10467 flow [2023-08-30 05:42:35,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 517 transitions, 10153 flow, removed 99 selfloop flow, removed 3 redundant places. [2023-08-30 05:42:35,061 INFO L231 Difference]: Finished difference. Result has 199 places, 408 transitions, 9348 flow [2023-08-30 05:42:35,062 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} [2023-08-30 05:42:35,062 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 83 predicate places. [2023-08-30 05:42:35,063 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 408 transitions, 9348 flow [2023-08-30 05:42:35,063 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) [2023-08-30 05:42:35,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:35,063 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] [2023-08-30 05:42:35,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 05:42:35,063 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:35,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash 809977930, now seen corresponding path program 2 times [2023-08-30 05:42:35,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:35,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607319700] [2023-08-30 05:42:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:35,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607319700] [2023-08-30 05:42:35,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607319700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:35,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:35,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:42:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769809092] [2023-08-30 05:42:35,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:35,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:35,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:35,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-08-30 05:42:35,493 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) [2023-08-30 05:42:35,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:35,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-08-30 05:42:35,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:42,935 INFO L130 PetriNetUnfolder]: 31056/51969 cut-off events. [2023-08-30 05:42:42,936 INFO L131 PetriNetUnfolder]: For 441880/442136 co-relation queries the response was YES. [2023-08-30 05:42:43,475 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. [2023-08-30 05:42:43,660 INFO L137 encePairwiseOnDemand]: 421/434 looper letters, 280 selfloop transitions, 206 changer transitions 0/538 dead transitions. [2023-08-30 05:42:43,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 538 transitions, 10807 flow [2023-08-30 05:42:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:42:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:42:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1902 transitions. [2023-08-30 05:42:43,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478110599078341 [2023-08-30 05:42:43,663 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1902 transitions. [2023-08-30 05:42:43,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1902 transitions. [2023-08-30 05:42:43,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:43,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1902 transitions. [2023-08-30 05:42:43,665 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) [2023-08-30 05:42:43,667 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) [2023-08-30 05:42:43,668 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) [2023-08-30 05:42:43,668 INFO L175 Difference]: Start difference. First operand has 199 places, 408 transitions, 9348 flow. Second operand 8 states and 1902 transitions. [2023-08-30 05:42:43,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 538 transitions, 10807 flow [2023-08-30 05:42:45,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 538 transitions, 10797 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-30 05:42:45,308 INFO L231 Difference]: Finished difference. Result has 204 places, 403 transitions, 9679 flow [2023-08-30 05:42:45,309 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} [2023-08-30 05:42:45,309 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 88 predicate places. [2023-08-30 05:42:45,309 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 403 transitions, 9679 flow [2023-08-30 05:42:45,310 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) [2023-08-30 05:42:45,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:45,310 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] [2023-08-30 05:42:45,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 05:42:45,310 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:45,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:45,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1793657168, now seen corresponding path program 2 times [2023-08-30 05:42:45,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:45,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035867748] [2023-08-30 05:42:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:45,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:45,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035867748] [2023-08-30 05:42:45,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035867748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:45,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:45,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 05:42:45,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191216806] [2023-08-30 05:42:45,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:45,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:42:45,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:45,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:42:45,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:42:45,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-08-30 05:42:45,937 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) [2023-08-30 05:42:45,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:45,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-08-30 05:42:45,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:42:54,885 INFO L130 PetriNetUnfolder]: 33533/56843 cut-off events. [2023-08-30 05:42:54,885 INFO L131 PetriNetUnfolder]: For 592707/592987 co-relation queries the response was YES. [2023-08-30 05:42:55,287 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. [2023-08-30 05:42:55,471 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 348 selfloop transitions, 220 changer transitions 0/624 dead transitions. [2023-08-30 05:42:55,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 624 transitions, 13660 flow [2023-08-30 05:42:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:42:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:42:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2134 transitions. [2023-08-30 05:42:55,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463389656938044 [2023-08-30 05:42:55,473 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2134 transitions. [2023-08-30 05:42:55,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2134 transitions. [2023-08-30 05:42:55,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:42:55,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2134 transitions. [2023-08-30 05:42:55,475 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) [2023-08-30 05:42:55,477 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) [2023-08-30 05:42:55,478 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) [2023-08-30 05:42:55,478 INFO L175 Difference]: Start difference. First operand has 204 places, 403 transitions, 9679 flow. Second operand 9 states and 2134 transitions. [2023-08-30 05:42:55,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 624 transitions, 13660 flow [2023-08-30 05:42:57,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 624 transitions, 13351 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-08-30 05:42:57,632 INFO L231 Difference]: Finished difference. Result has 211 places, 474 transitions, 12589 flow [2023-08-30 05:42:57,632 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} [2023-08-30 05:42:57,632 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 95 predicate places. [2023-08-30 05:42:57,633 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 474 transitions, 12589 flow [2023-08-30 05:42:57,633 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) [2023-08-30 05:42:57,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:42:57,633 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] [2023-08-30 05:42:57,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 05:42:57,634 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:42:57,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:42:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1325936182, now seen corresponding path program 3 times [2023-08-30 05:42:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:42:57,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449276469] [2023-08-30 05:42:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:42:57,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:42:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:42:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:42:57,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:42:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449276469] [2023-08-30 05:42:57,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449276469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:42:57,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:42:57,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:42:57,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8703131] [2023-08-30 05:42:57,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:42:57,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:42:57,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:42:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:42:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:42:58,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-30 05:42:58,104 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) [2023-08-30 05:42:58,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:42:58,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-30 05:42:58,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:09,428 INFO L130 PetriNetUnfolder]: 40463/66871 cut-off events. [2023-08-30 05:43:09,428 INFO L131 PetriNetUnfolder]: For 718578/718646 co-relation queries the response was YES. [2023-08-30 05:43:10,183 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. [2023-08-30 05:43:10,431 INFO L137 encePairwiseOnDemand]: 417/434 looper letters, 396 selfloop transitions, 352 changer transitions 0/800 dead transitions. [2023-08-30 05:43:10,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 800 transitions, 17565 flow [2023-08-30 05:43:10,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 05:43:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 05:43:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3274 transitions. [2023-08-30 05:43:10,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388413429888085 [2023-08-30 05:43:10,434 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3274 transitions. [2023-08-30 05:43:10,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3274 transitions. [2023-08-30 05:43:10,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:10,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3274 transitions. [2023-08-30 05:43:10,437 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) [2023-08-30 05:43:10,441 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) [2023-08-30 05:43:10,441 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) [2023-08-30 05:43:10,441 INFO L175 Difference]: Start difference. First operand has 211 places, 474 transitions, 12589 flow. Second operand 14 states and 3274 transitions. [2023-08-30 05:43:10,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 800 transitions, 17565 flow [2023-08-30 05:43:12,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 800 transitions, 17497 flow, removed 34 selfloop flow, removed 0 redundant places. [2023-08-30 05:43:12,911 INFO L231 Difference]: Finished difference. Result has 230 places, 557 transitions, 15822 flow [2023-08-30 05:43:12,912 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} [2023-08-30 05:43:12,913 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 114 predicate places. [2023-08-30 05:43:12,913 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 557 transitions, 15822 flow [2023-08-30 05:43:12,913 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) [2023-08-30 05:43:12,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:12,914 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] [2023-08-30 05:43:12,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 05:43:12,914 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:43:12,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1023465888, now seen corresponding path program 4 times [2023-08-30 05:43:12,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:43:12,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764999525] [2023-08-30 05:43:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:43:12,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:43:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:43:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:43:13,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:43:13,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764999525] [2023-08-30 05:43:13,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764999525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:43:13,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:43:13,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 05:43:13,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546462262] [2023-08-30 05:43:13,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:43:13,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 05:43:13,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:43:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 05:43:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:43:13,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-08-30 05:43:13,321 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) [2023-08-30 05:43:13,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:13,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-08-30 05:43:13,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:25,868 INFO L130 PetriNetUnfolder]: 35568/60440 cut-off events. [2023-08-30 05:43:25,868 INFO L131 PetriNetUnfolder]: For 823002/823422 co-relation queries the response was YES. [2023-08-30 05:43:26,588 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. [2023-08-30 05:43:26,825 INFO L137 encePairwiseOnDemand]: 421/434 looper letters, 321 selfloop transitions, 295 changer transitions 0/682 dead transitions. [2023-08-30 05:43:26,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 682 transitions, 17480 flow [2023-08-30 05:43:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:43:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:43:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1900 transitions. [2023-08-30 05:43:26,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472350230414746 [2023-08-30 05:43:26,827 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1900 transitions. [2023-08-30 05:43:26,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1900 transitions. [2023-08-30 05:43:26,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:26,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1900 transitions. [2023-08-30 05:43:26,829 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) [2023-08-30 05:43:26,831 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) [2023-08-30 05:43:26,831 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) [2023-08-30 05:43:26,831 INFO L175 Difference]: Start difference. First operand has 230 places, 557 transitions, 15822 flow. Second operand 8 states and 1900 transitions. [2023-08-30 05:43:26,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 682 transitions, 17480 flow [2023-08-30 05:43:29,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 682 transitions, 17170 flow, removed 97 selfloop flow, removed 3 redundant places. [2023-08-30 05:43:29,930 INFO L231 Difference]: Finished difference. Result has 231 places, 548 transitions, 15952 flow [2023-08-30 05:43:29,930 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} [2023-08-30 05:43:29,931 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 115 predicate places. [2023-08-30 05:43:29,931 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 548 transitions, 15952 flow [2023-08-30 05:43:29,931 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) [2023-08-30 05:43:29,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:29,931 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] [2023-08-30 05:43:29,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 05:43:29,932 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:43:29,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:29,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1094398370, now seen corresponding path program 1 times [2023-08-30 05:43:29,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:43:29,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372883275] [2023-08-30 05:43:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:43:29,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:43:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:43:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:43:30,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:43:30,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372883275] [2023-08-30 05:43:30,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372883275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:43:30,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:43:30,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 05:43:30,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670789176] [2023-08-30 05:43:30,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:43:30,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:43:30,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:43:30,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:43:30,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:43:30,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 434 [2023-08-30 05:43:30,444 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) [2023-08-30 05:43:30,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:30,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 434 [2023-08-30 05:43:30,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:43:43,286 INFO L130 PetriNetUnfolder]: 44121/72126 cut-off events. [2023-08-30 05:43:43,286 INFO L131 PetriNetUnfolder]: For 887128/887144 co-relation queries the response was YES. [2023-08-30 05:43:44,267 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. [2023-08-30 05:43:44,796 INFO L137 encePairwiseOnDemand]: 415/434 looper letters, 449 selfloop transitions, 432 changer transitions 0/909 dead transitions. [2023-08-30 05:43:44,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 909 transitions, 20562 flow [2023-08-30 05:43:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 05:43:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 05:43:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5181 transitions. [2023-08-30 05:43:44,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190342616710079 [2023-08-30 05:43:44,801 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5181 transitions. [2023-08-30 05:43:44,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5181 transitions. [2023-08-30 05:43:44,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:43:44,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5181 transitions. [2023-08-30 05:43:44,807 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) [2023-08-30 05:43:44,813 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) [2023-08-30 05:43:44,813 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) [2023-08-30 05:43:44,814 INFO L175 Difference]: Start difference. First operand has 231 places, 548 transitions, 15952 flow. Second operand 23 states and 5181 transitions. [2023-08-30 05:43:44,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 909 transitions, 20562 flow [2023-08-30 05:43:48,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 909 transitions, 19814 flow, removed 43 selfloop flow, removed 7 redundant places. [2023-08-30 05:43:48,202 INFO L231 Difference]: Finished difference. Result has 249 places, 594 transitions, 17371 flow [2023-08-30 05:43:48,203 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} [2023-08-30 05:43:48,204 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 133 predicate places. [2023-08-30 05:43:48,204 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 594 transitions, 17371 flow [2023-08-30 05:43:48,204 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) [2023-08-30 05:43:48,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:43:48,204 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] [2023-08-30 05:43:48,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 05:43:48,205 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:43:48,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:43:48,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1842512057, now seen corresponding path program 1 times [2023-08-30 05:43:48,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:43:48,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144319148] [2023-08-30 05:43:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:43:48,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:43:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:43:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:43:48,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:43:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144319148] [2023-08-30 05:43:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144319148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:43:48,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:43:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:43:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917689866] [2023-08-30 05:43:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:43:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:43:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:43:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:43:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:43:48,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-08-30 05:43:48,597 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) [2023-08-30 05:43:48,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:43:48,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-08-30 05:43:48,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:44:01,934 INFO L130 PetriNetUnfolder]: 43242/70574 cut-off events. [2023-08-30 05:44:01,935 INFO L131 PetriNetUnfolder]: For 908540/908564 co-relation queries the response was YES. [2023-08-30 05:44:02,577 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. [2023-08-30 05:44:02,826 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 414 selfloop transitions, 372 changer transitions 0/840 dead transitions. [2023-08-30 05:44:02,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 840 transitions, 20687 flow [2023-08-30 05:44:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 05:44:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 05:44:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3260 transitions. [2023-08-30 05:44:02,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365371955233706 [2023-08-30 05:44:02,829 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3260 transitions. [2023-08-30 05:44:02,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3260 transitions. [2023-08-30 05:44:02,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:44:02,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3260 transitions. [2023-08-30 05:44:02,832 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) [2023-08-30 05:44:02,835 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) [2023-08-30 05:44:02,835 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) [2023-08-30 05:44:02,835 INFO L175 Difference]: Start difference. First operand has 249 places, 594 transitions, 17371 flow. Second operand 14 states and 3260 transitions. [2023-08-30 05:44:02,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 840 transitions, 20687 flow [2023-08-30 05:44:08,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 840 transitions, 20067 flow, removed 150 selfloop flow, removed 4 redundant places. [2023-08-30 05:44:08,078 INFO L231 Difference]: Finished difference. Result has 260 places, 603 transitions, 17998 flow [2023-08-30 05:44:08,078 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} [2023-08-30 05:44:08,079 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 144 predicate places. [2023-08-30 05:44:08,079 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 603 transitions, 17998 flow [2023-08-30 05:44:08,080 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) [2023-08-30 05:44:08,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:44:08,080 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] [2023-08-30 05:44:08,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 05:44:08,080 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-30 05:44:08,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:44:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash 811860203, now seen corresponding path program 1 times [2023-08-30 05:44:08,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:44:08,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612203381] [2023-08-30 05:44:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:44:08,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:44:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:44:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:44:08,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:44:08,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612203381] [2023-08-30 05:44:08,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612203381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:44:08,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:44:08,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 05:44:08,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797947671] [2023-08-30 05:44:08,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:44:08,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 05:44:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:44:08,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 05:44:08,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 05:44:08,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 434 [2023-08-30 05:44:08,580 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) [2023-08-30 05:44:08,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:44:08,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 434 [2023-08-30 05:44:08,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand