./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 BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:14:21,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:14:21,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:14:21,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:14:21,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:14:21,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:14:21,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:14:21,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:14:21,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:14:21,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:14:21,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:14:21,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:14:21,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:14:21,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:14:21,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:14:21,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:14:21,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:14:21,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:14:21,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:14:21,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:14:21,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:14:21,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:14:21,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:14:21,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:14:21,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:14:21,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:14:21,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:14:21,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:14:21,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:14:21,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:14:21,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:14:21,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:14:21,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:14:21,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:14:21,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:14:21,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:14:21,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:14:21,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:14:21,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:14:21,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:14:21,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:14:21,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:14:21,548 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:14:21,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:14:21,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:14:21,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:14:21,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:14:21,550 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:14:21,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:14:21,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:14:21,551 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:14:21,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:14:21,553 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:14:21,553 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:14:21,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:14:21,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:14:21,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:14:21,553 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:14:21,554 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:14:21,554 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:14:21,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:14:21,554 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:14:21,554 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:14:21,555 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:14:21,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:14:21,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:14:21,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:14:21,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:14:21,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:14:21,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:14:21,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:14:21,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:14:21,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:14:21,557 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:14:21,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:14:21,557 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:14:21,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:14:21,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:14:21,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:14:21,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:14:21,909 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:14:21,910 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:14:21,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-barrier.wvr.c [2023-09-01 02:14:23,045 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:14:23,300 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:14:23,300 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier.wvr.c [2023-09-01 02:14:23,311 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff2be634f/2e944bfa59824b5093f69957a6b50740/FLAG47d9be63c [2023-09-01 02:14:23,331 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff2be634f/2e944bfa59824b5093f69957a6b50740 [2023-09-01 02:14:23,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:14:23,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:14:23,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:14:23,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:14:23,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:14:23,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35845263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23, skipping insertion in model container [2023-09-01 02:14:23,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:14:23,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:14:23,533 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] [2023-09-01 02:14:23,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:14:23,555 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:14:23,607 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] [2023-09-01 02:14:23,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:14:23,626 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:14:23,630 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:14:23,636 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:14:23,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23 WrapperNode [2023-09-01 02:14:23,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:14:23,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:14:23,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:14:23,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:14:23,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,701 INFO L138 Inliner]: procedures = 25, calls = 98, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 265 [2023-09-01 02:14:23,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:14:23,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:14:23,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:14:23,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:14:23,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,746 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:14:23,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:14:23,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:14:23,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:14:23,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (1/1) ... [2023-09-01 02:14:23,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:14:23,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:14:23,786 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) [2023-09-01 02:14:23,813 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 [2023-09-01 02:14:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:14:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:14:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 02:14:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 02:14:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:14:23,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:14:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:14:23,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:14:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:14:23,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:14:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:14:23,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:14:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 02:14:23,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-09-01 02:14:23,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-09-01 02:14:23,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-09-01 02:14:23,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-09-01 02:14:23,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:14:23,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:14:23,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:14:23,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:14:23,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:14:23,832 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:14:23,971 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:14:23,973 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:14:24,420 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:14:24,464 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:14:24,464 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-09-01 02:14:24,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:14:24 BoogieIcfgContainer [2023-09-01 02:14:24,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:14:24,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:14:24,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:14:24,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:14:24,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:14:23" (1/3) ... [2023-09-01 02:14:24,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db2fe0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:14:24, skipping insertion in model container [2023-09-01 02:14:24,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:14:23" (2/3) ... [2023-09-01 02:14:24,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db2fe0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:14:24, skipping insertion in model container [2023-09-01 02:14:24,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:14:24" (3/3) ... [2023-09-01 02:14:24,486 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2023-09-01 02:14:24,502 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:14:24,503 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-09-01 02:14:24,503 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:14:24,701 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-09-01 02:14:24,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 268 transitions, 608 flow [2023-09-01 02:14:24,862 INFO L130 PetriNetUnfolder]: 8/236 cut-off events. [2023-09-01 02:14:24,863 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:14:24,869 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. [2023-09-01 02:14:24,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 268 transitions, 608 flow [2023-09-01 02:14:24,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 232 transitions, 512 flow [2023-09-01 02:14:24,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:14:24,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 232 transitions, 512 flow [2023-09-01 02:14:24,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 232 transitions, 512 flow [2023-09-01 02:14:24,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 232 transitions, 512 flow [2023-09-01 02:14:24,932 INFO L130 PetriNetUnfolder]: 8/232 cut-off events. [2023-09-01 02:14:24,932 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 02:14:24,934 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. [2023-09-01 02:14:24,940 INFO L119 LiptonReduction]: Number of co-enabled transitions 10420 [2023-09-01 02:14:30,018 INFO L134 LiptonReduction]: Checked pairs total: 74898 [2023-09-01 02:14:30,019 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-09-01 02:14:30,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:14:30,037 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;@7d3cb243, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:14:30,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-09-01 02:14:30,039 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 02:14:30,039 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:14:30,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:30,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 02:14:30,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:30,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash 887, now seen corresponding path program 1 times [2023-09-01 02:14:30,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:30,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473259856] [2023-09-01 02:14:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:30,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:14:30,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473259856] [2023-09-01 02:14:30,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473259856] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:30,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:30,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 02:14:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686165385] [2023-09-01 02:14:30,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:30,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 02:14:30,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 02:14:30,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 02:14:30,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 434 [2023-09-01 02:14:30,189 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) [2023-09-01 02:14:30,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:30,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 434 [2023-09-01 02:14:30,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:35,603 INFO L130 PetriNetUnfolder]: 39355/58012 cut-off events. [2023-09-01 02:14:35,604 INFO L131 PetriNetUnfolder]: For 5246/5246 co-relation queries the response was YES. [2023-09-01 02:14:35,824 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. [2023-09-01 02:14:36,219 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 50 selfloop transitions, 0 changer transitions 0/98 dead transitions. [2023-09-01 02:14:36,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 98 transitions, 344 flow [2023-09-01 02:14:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 02:14:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 02:14:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 533 transitions. [2023-09-01 02:14:36,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140552995391705 [2023-09-01 02:14:36,392 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 533 transitions. [2023-09-01 02:14:36,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 533 transitions. [2023-09-01 02:14:36,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:36,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 533 transitions. [2023-09-01 02:14:36,413 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) [2023-09-01 02:14:36,420 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) [2023-09-01 02:14:36,421 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) [2023-09-01 02:14:36,422 INFO L175 Difference]: Start difference. First operand has 116 places, 103 transitions, 254 flow. Second operand 2 states and 533 transitions. [2023-09-01 02:14:36,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 98 transitions, 344 flow [2023-09-01 02:14:36,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 02:14:36,651 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 212 flow [2023-09-01 02:14:36,653 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} [2023-09-01 02:14:36,656 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -14 predicate places. [2023-09-01 02:14:36,656 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 212 flow [2023-09-01 02:14:36,656 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) [2023-09-01 02:14:36,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:36,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:14:36,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 02:14:36,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:36,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:36,658 INFO L85 PathProgramCache]: Analyzing trace with hash 840606292, now seen corresponding path program 1 times [2023-09-01 02:14:36,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:36,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598221255] [2023-09-01 02:14:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:36,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:14:36,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:36,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598221255] [2023-09-01 02:14:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598221255] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:36,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:14:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019901556] [2023-09-01 02:14:36,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:14:36,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:14:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:14:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 434 [2023-09-01 02:14:36,902 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) [2023-09-01 02:14:36,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:36,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 434 [2023-09-01 02:14:36,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:40,883 INFO L130 PetriNetUnfolder]: 40594/60151 cut-off events. [2023-09-01 02:14:40,884 INFO L131 PetriNetUnfolder]: For 964/964 co-relation queries the response was YES. [2023-09-01 02:14:41,009 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. [2023-09-01 02:14:41,238 INFO L137 encePairwiseOnDemand]: 425/434 looper letters, 93 selfloop transitions, 7 changer transitions 0/146 dead transitions. [2023-09-01 02:14:41,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 146 transitions, 523 flow [2023-09-01 02:14:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:14:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:14:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 768 transitions. [2023-09-01 02:14:41,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898617511520737 [2023-09-01 02:14:41,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 768 transitions. [2023-09-01 02:14:41,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 768 transitions. [2023-09-01 02:14:41,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:41,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 768 transitions. [2023-09-01 02:14:41,246 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) [2023-09-01 02:14:41,249 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) [2023-09-01 02:14:41,250 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) [2023-09-01 02:14:41,250 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 212 flow. Second operand 3 states and 768 transitions. [2023-09-01 02:14:41,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 146 transitions, 523 flow [2023-09-01 02:14:41,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 146 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:14:41,254 INFO L231 Difference]: Finished difference. Result has 106 places, 104 transitions, 268 flow [2023-09-01 02:14:41,255 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} [2023-09-01 02:14:41,255 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2023-09-01 02:14:41,255 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 104 transitions, 268 flow [2023-09-01 02:14:41,256 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) [2023-09-01 02:14:41,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:41,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:14:41,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 02:14:41,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:41,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:41,257 INFO L85 PathProgramCache]: Analyzing trace with hash 840606293, now seen corresponding path program 1 times [2023-09-01 02:14:41,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:41,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007575821] [2023-09-01 02:14:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:41,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:14:41,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:41,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007575821] [2023-09-01 02:14:41,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007575821] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:41,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:41,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:14:41,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016320129] [2023-09-01 02:14:41,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:41,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:14:41,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:41,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:14:41,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:14:41,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 434 [2023-09-01 02:14:41,433 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) [2023-09-01 02:14:41,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:41,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 434 [2023-09-01 02:14:41,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:45,572 INFO L130 PetriNetUnfolder]: 40296/59709 cut-off events. [2023-09-01 02:14:45,573 INFO L131 PetriNetUnfolder]: For 2845/2853 co-relation queries the response was YES. [2023-09-01 02:14:45,735 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. [2023-09-01 02:14:46,124 INFO L137 encePairwiseOnDemand]: 431/434 looper letters, 53 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-09-01 02:14:46,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 372 flow [2023-09-01 02:14:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:14:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:14:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2023-09-01 02:14:46,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783410138248848 [2023-09-01 02:14:46,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2023-09-01 02:14:46,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2023-09-01 02:14:46,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:46,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2023-09-01 02:14:46,129 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) [2023-09-01 02:14:46,132 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) [2023-09-01 02:14:46,133 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) [2023-09-01 02:14:46,133 INFO L175 Difference]: Start difference. First operand has 106 places, 104 transitions, 268 flow. Second operand 3 states and 753 transitions. [2023-09-01 02:14:46,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 372 flow [2023-09-01 02:14:46,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:14:46,144 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 252 flow [2023-09-01 02:14:46,144 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} [2023-09-01 02:14:46,145 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -12 predicate places. [2023-09-01 02:14:46,145 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 252 flow [2023-09-01 02:14:46,146 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) [2023-09-01 02:14:46,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:46,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:46,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 02:14:46,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:46,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:46,147 INFO L85 PathProgramCache]: Analyzing trace with hash 368815539, now seen corresponding path program 1 times [2023-09-01 02:14:46,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:46,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762622224] [2023-09-01 02:14:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:46,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:14:46,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:46,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762622224] [2023-09-01 02:14:46,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762622224] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:46,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:46,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:14:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367077473] [2023-09-01 02:14:46,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:46,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:14:46,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:14:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:14:46,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 434 [2023-09-01 02:14:46,337 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) [2023-09-01 02:14:46,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:46,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 434 [2023-09-01 02:14:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:49,205 INFO L130 PetriNetUnfolder]: 31144/46627 cut-off events. [2023-09-01 02:14:49,206 INFO L131 PetriNetUnfolder]: For 1553/1553 co-relation queries the response was YES. [2023-09-01 02:14:49,310 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. [2023-09-01 02:14:49,530 INFO L137 encePairwiseOnDemand]: 427/434 looper letters, 95 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2023-09-01 02:14:49,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 593 flow [2023-09-01 02:14:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:14:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:14:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-09-01 02:14:49,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775729646697388 [2023-09-01 02:14:49,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-09-01 02:14:49,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-09-01 02:14:49,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:49,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-09-01 02:14:49,539 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) [2023-09-01 02:14:49,541 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) [2023-09-01 02:14:49,542 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) [2023-09-01 02:14:49,543 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 252 flow. Second operand 3 states and 752 transitions. [2023-09-01 02:14:49,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 593 flow [2023-09-01 02:14:49,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 592 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:14:49,552 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 339 flow [2023-09-01 02:14:49,553 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} [2023-09-01 02:14:49,554 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -9 predicate places. [2023-09-01 02:14:49,555 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 339 flow [2023-09-01 02:14:49,555 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) [2023-09-01 02:14:49,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:49,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:49,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 02:14:49,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:49,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:49,558 INFO L85 PathProgramCache]: Analyzing trace with hash 368815538, now seen corresponding path program 1 times [2023-09-01 02:14:49,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:49,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480346334] [2023-09-01 02:14:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:49,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:14:49,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:49,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480346334] [2023-09-01 02:14:49,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480346334] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:49,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:49,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:14:49,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568474465] [2023-09-01 02:14:49,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:49,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:14:49,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:49,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:14:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:14:49,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 434 [2023-09-01 02:14:49,769 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) [2023-09-01 02:14:49,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:49,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 434 [2023-09-01 02:14:49,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:52,023 INFO L130 PetriNetUnfolder]: 20447/30939 cut-off events. [2023-09-01 02:14:52,024 INFO L131 PetriNetUnfolder]: For 5225/5233 co-relation queries the response was YES. [2023-09-01 02:14:52,098 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. [2023-09-01 02:14:52,244 INFO L137 encePairwiseOnDemand]: 432/434 looper letters, 60 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-09-01 02:14:52,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 459 flow [2023-09-01 02:14:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:14:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:14:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-09-01 02:14:52,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768049155145929 [2023-09-01 02:14:52,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-09-01 02:14:52,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-09-01 02:14:52,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:52,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-09-01 02:14:52,250 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) [2023-09-01 02:14:52,254 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) [2023-09-01 02:14:52,255 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) [2023-09-01 02:14:52,255 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 339 flow. Second operand 3 states and 751 transitions. [2023-09-01 02:14:52,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 459 flow [2023-09-01 02:14:52,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 109 transitions, 439 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:14:52,273 INFO L231 Difference]: Finished difference. Result has 106 places, 109 transitions, 319 flow [2023-09-01 02:14:52,274 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} [2023-09-01 02:14:52,276 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -10 predicate places. [2023-09-01 02:14:52,277 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 109 transitions, 319 flow [2023-09-01 02:14:52,277 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) [2023-09-01 02:14:52,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:52,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:52,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 02:14:52,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:52,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:52,278 INFO L85 PathProgramCache]: Analyzing trace with hash 158365259, now seen corresponding path program 1 times [2023-09-01 02:14:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:52,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046180293] [2023-09-01 02:14:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:52,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:14:52,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046180293] [2023-09-01 02:14:52,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046180293] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:52,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:52,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:14:52,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012274398] [2023-09-01 02:14:52,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:52,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:14:52,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:14:52,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:14:52,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 434 [2023-09-01 02:14:52,544 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) [2023-09-01 02:14:52,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:52,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 434 [2023-09-01 02:14:52,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:54,306 INFO L130 PetriNetUnfolder]: 14391/24168 cut-off events. [2023-09-01 02:14:54,306 INFO L131 PetriNetUnfolder]: For 4204/4204 co-relation queries the response was YES. [2023-09-01 02:14:54,384 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. [2023-09-01 02:14:54,477 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 118 selfloop transitions, 13 changer transitions 0/175 dead transitions. [2023-09-01 02:14:54,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 175 transitions, 787 flow [2023-09-01 02:14:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:14:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:14:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1001 transitions. [2023-09-01 02:14:54,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5766129032258065 [2023-09-01 02:14:54,480 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1001 transitions. [2023-09-01 02:14:54,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1001 transitions. [2023-09-01 02:14:54,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:54,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1001 transitions. [2023-09-01 02:14:54,483 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) [2023-09-01 02:14:54,486 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) [2023-09-01 02:14:54,488 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) [2023-09-01 02:14:54,488 INFO L175 Difference]: Start difference. First operand has 106 places, 109 transitions, 319 flow. Second operand 4 states and 1001 transitions. [2023-09-01 02:14:54,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 175 transitions, 787 flow [2023-09-01 02:14:54,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 786 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:14:54,494 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 413 flow [2023-09-01 02:14:54,494 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} [2023-09-01 02:14:54,495 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -8 predicate places. [2023-09-01 02:14:54,495 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 413 flow [2023-09-01 02:14:54,496 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) [2023-09-01 02:14:54,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:54,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:54,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 02:14:54,497 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:54,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 653618012, now seen corresponding path program 1 times [2023-09-01 02:14:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190197917] [2023-09-01 02:14:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:54,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:14:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:54,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190197917] [2023-09-01 02:14:54,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190197917] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:54,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:54,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:14:54,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413214035] [2023-09-01 02:14:54,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:54,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:14:54,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:14:54,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:14:54,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 434 [2023-09-01 02:14:54,646 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) [2023-09-01 02:14:54,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:54,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 434 [2023-09-01 02:14:54,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:56,251 INFO L130 PetriNetUnfolder]: 13079/22193 cut-off events. [2023-09-01 02:14:56,252 INFO L131 PetriNetUnfolder]: For 8967/8979 co-relation queries the response was YES. [2023-09-01 02:14:56,317 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. [2023-09-01 02:14:56,394 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 103 selfloop transitions, 13 changer transitions 0/161 dead transitions. [2023-09-01 02:14:56,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 161 transitions, 820 flow [2023-09-01 02:14:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:14:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:14:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-09-01 02:14:56,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837173579109063 [2023-09-01 02:14:56,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-09-01 02:14:56,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-09-01 02:14:56,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:56,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-09-01 02:14:56,399 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) [2023-09-01 02:14:56,401 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) [2023-09-01 02:14:56,402 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) [2023-09-01 02:14:56,402 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 413 flow. Second operand 3 states and 760 transitions. [2023-09-01 02:14:56,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 161 transitions, 820 flow [2023-09-01 02:14:56,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 161 transitions, 811 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:14:56,409 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 558 flow [2023-09-01 02:14:56,409 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} [2023-09-01 02:14:56,410 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -5 predicate places. [2023-09-01 02:14:56,410 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 558 flow [2023-09-01 02:14:56,411 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) [2023-09-01 02:14:56,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:56,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:56,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 02:14:56,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:56,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 653618013, now seen corresponding path program 1 times [2023-09-01 02:14:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:56,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654984960] [2023-09-01 02:14:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:56,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:14:56,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654984960] [2023-09-01 02:14:56,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654984960] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:56,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:56,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:14:56,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644062706] [2023-09-01 02:14:56,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:56,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:14:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:14:56,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:14:56,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 434 [2023-09-01 02:14:56,636 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) [2023-09-01 02:14:56,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:56,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 434 [2023-09-01 02:14:56,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:14:58,198 INFO L130 PetriNetUnfolder]: 10228/18402 cut-off events. [2023-09-01 02:14:58,198 INFO L131 PetriNetUnfolder]: For 12107/12123 co-relation queries the response was YES. [2023-09-01 02:14:58,255 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. [2023-09-01 02:14:58,322 INFO L137 encePairwiseOnDemand]: 425/434 looper letters, 123 selfloop transitions, 19 changer transitions 0/186 dead transitions. [2023-09-01 02:14:58,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 186 transitions, 1058 flow [2023-09-01 02:14:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:14:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:14:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 998 transitions. [2023-09-01 02:14:58,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748847926267281 [2023-09-01 02:14:58,325 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 998 transitions. [2023-09-01 02:14:58,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 998 transitions. [2023-09-01 02:14:58,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:14:58,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 998 transitions. [2023-09-01 02:14:58,328 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) [2023-09-01 02:14:58,331 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) [2023-09-01 02:14:58,332 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) [2023-09-01 02:14:58,332 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 558 flow. Second operand 4 states and 998 transitions. [2023-09-01 02:14:58,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 186 transitions, 1058 flow [2023-09-01 02:14:58,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 186 transitions, 1032 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:14:58,347 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 566 flow [2023-09-01 02:14:58,347 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} [2023-09-01 02:14:58,348 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-09-01 02:14:58,348 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 566 flow [2023-09-01 02:14:58,348 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) [2023-09-01 02:14:58,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:14:58,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:14:58,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 02:14:58,349 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:14:58,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:14:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1434929811, now seen corresponding path program 1 times [2023-09-01 02:14:58,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:14:58,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259766403] [2023-09-01 02:14:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:14:58,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:14:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:14:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:14:58,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:14:58,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259766403] [2023-09-01 02:14:58,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259766403] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:14:58,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:14:58,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:14:58,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565790872] [2023-09-01 02:14:58,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:14:58,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:14:58,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:14:58,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:14:58,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:14:58,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 434 [2023-09-01 02:14:58,464 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) [2023-09-01 02:14:58,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:14:58,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 434 [2023-09-01 02:14:58,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:00,112 INFO L130 PetriNetUnfolder]: 12048/21014 cut-off events. [2023-09-01 02:15:00,112 INFO L131 PetriNetUnfolder]: For 16571/16601 co-relation queries the response was YES. [2023-09-01 02:15:00,157 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. [2023-09-01 02:15:00,222 INFO L137 encePairwiseOnDemand]: 425/434 looper letters, 106 selfloop transitions, 15 changer transitions 0/165 dead transitions. [2023-09-01 02:15:00,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 979 flow [2023-09-01 02:15:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:15:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:15:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 758 transitions. [2023-09-01 02:15:00,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821812596006144 [2023-09-01 02:15:00,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 758 transitions. [2023-09-01 02:15:00,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 758 transitions. [2023-09-01 02:15:00,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:00,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 758 transitions. [2023-09-01 02:15:00,227 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) [2023-09-01 02:15:00,229 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) [2023-09-01 02:15:00,229 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) [2023-09-01 02:15:00,229 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 566 flow. Second operand 3 states and 758 transitions. [2023-09-01 02:15:00,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 979 flow [2023-09-01 02:15:00,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 954 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:15:00,255 INFO L231 Difference]: Finished difference. Result has 112 places, 132 transitions, 701 flow [2023-09-01 02:15:00,256 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} [2023-09-01 02:15:00,257 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -4 predicate places. [2023-09-01 02:15:00,257 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 132 transitions, 701 flow [2023-09-01 02:15:00,257 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) [2023-09-01 02:15:00,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:00,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:15:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 02:15:00,258 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:00,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1434929812, now seen corresponding path program 1 times [2023-09-01 02:15:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:00,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729427983] [2023-09-01 02:15:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:00,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:00,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729427983] [2023-09-01 02:15:00,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729427983] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:00,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:00,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:15:00,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887598607] [2023-09-01 02:15:00,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:00,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:15:00,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:00,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:15:00,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:15:00,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 434 [2023-09-01 02:15:00,383 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) [2023-09-01 02:15:00,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:00,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 434 [2023-09-01 02:15:00,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:01,702 INFO L130 PetriNetUnfolder]: 10682/18786 cut-off events. [2023-09-01 02:15:01,702 INFO L131 PetriNetUnfolder]: For 19657/19807 co-relation queries the response was YES. [2023-09-01 02:15:01,761 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. [2023-09-01 02:15:02,006 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 103 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2023-09-01 02:15:02,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 161 transitions, 1087 flow [2023-09-01 02:15:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:15:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:15:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2023-09-01 02:15:02,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944700460829493 [2023-09-01 02:15:02,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2023-09-01 02:15:02,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2023-09-01 02:15:02,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:02,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2023-09-01 02:15:02,011 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) [2023-09-01 02:15:02,013 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) [2023-09-01 02:15:02,014 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) [2023-09-01 02:15:02,014 INFO L175 Difference]: Start difference. First operand has 112 places, 132 transitions, 701 flow. Second operand 3 states and 774 transitions. [2023-09-01 02:15:02,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 161 transitions, 1087 flow [2023-09-01 02:15:02,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1057 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:15:02,029 INFO L231 Difference]: Finished difference. Result has 110 places, 130 transitions, 687 flow [2023-09-01 02:15:02,029 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} [2023-09-01 02:15:02,030 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-09-01 02:15:02,030 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 130 transitions, 687 flow [2023-09-01 02:15:02,030 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) [2023-09-01 02:15:02,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:02,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:15:02,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 02:15:02,031 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:02,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:02,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1903633977, now seen corresponding path program 1 times [2023-09-01 02:15:02,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:02,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518797580] [2023-09-01 02:15:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:02,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:02,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:02,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518797580] [2023-09-01 02:15:02,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518797580] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:02,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:02,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:15:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206760443] [2023-09-01 02:15:02,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:15:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:15:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:15:02,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 434 [2023-09-01 02:15:02,165 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) [2023-09-01 02:15:02,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:02,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 434 [2023-09-01 02:15:02,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:03,648 INFO L130 PetriNetUnfolder]: 10686/18645 cut-off events. [2023-09-01 02:15:03,648 INFO L131 PetriNetUnfolder]: For 18978/19110 co-relation queries the response was YES. [2023-09-01 02:15:03,695 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. [2023-09-01 02:15:03,786 INFO L137 encePairwiseOnDemand]: 430/434 looper letters, 108 selfloop transitions, 11 changer transitions 0/165 dead transitions. [2023-09-01 02:15:03,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 165 transitions, 1159 flow [2023-09-01 02:15:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:15:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:15:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2023-09-01 02:15:03,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960061443932412 [2023-09-01 02:15:03,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2023-09-01 02:15:03,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2023-09-01 02:15:03,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:03,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2023-09-01 02:15:03,799 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) [2023-09-01 02:15:03,800 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) [2023-09-01 02:15:03,801 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) [2023-09-01 02:15:03,801 INFO L175 Difference]: Start difference. First operand has 110 places, 130 transitions, 687 flow. Second operand 3 states and 776 transitions. [2023-09-01 02:15:03,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 165 transitions, 1159 flow [2023-09-01 02:15:03,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1123 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:15:03,815 INFO L231 Difference]: Finished difference. Result has 108 places, 128 transitions, 685 flow [2023-09-01 02:15:03,816 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} [2023-09-01 02:15:03,816 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -8 predicate places. [2023-09-01 02:15:03,816 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 128 transitions, 685 flow [2023-09-01 02:15:03,817 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) [2023-09-01 02:15:03,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:03,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:15:03,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 02:15:03,817 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:03,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1903633978, now seen corresponding path program 1 times [2023-09-01 02:15:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:03,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258369718] [2023-09-01 02:15:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:03,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:03,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:03,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258369718] [2023-09-01 02:15:03,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258369718] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:03,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:03,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:15:03,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629470868] [2023-09-01 02:15:03,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:03,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:15:03,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:15:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:15:03,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 434 [2023-09-01 02:15:03,928 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) [2023-09-01 02:15:03,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:03,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 434 [2023-09-01 02:15:03,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:05,511 INFO L130 PetriNetUnfolder]: 13710/22386 cut-off events. [2023-09-01 02:15:05,511 INFO L131 PetriNetUnfolder]: For 24894/25056 co-relation queries the response was YES. [2023-09-01 02:15:05,565 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. [2023-09-01 02:15:05,630 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 115 selfloop transitions, 20 changer transitions 0/177 dead transitions. [2023-09-01 02:15:05,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 177 transitions, 1180 flow [2023-09-01 02:15:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:15:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:15:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-09-01 02:15:05,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837173579109063 [2023-09-01 02:15:05,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-09-01 02:15:05,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-09-01 02:15:05,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:05,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-09-01 02:15:05,634 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) [2023-09-01 02:15:05,636 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) [2023-09-01 02:15:05,637 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) [2023-09-01 02:15:05,637 INFO L175 Difference]: Start difference. First operand has 108 places, 128 transitions, 685 flow. Second operand 3 states and 760 transitions. [2023-09-01 02:15:05,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 177 transitions, 1180 flow [2023-09-01 02:15:05,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 177 transitions, 1158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:15:05,646 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 890 flow [2023-09-01 02:15:05,646 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} [2023-09-01 02:15:05,647 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -6 predicate places. [2023-09-01 02:15:05,647 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 890 flow [2023-09-01 02:15:05,647 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) [2023-09-01 02:15:05,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:05,648 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] [2023-09-01 02:15:05,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 02:15:05,648 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:05,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash -945684417, now seen corresponding path program 1 times [2023-09-01 02:15:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:05,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905567146] [2023-09-01 02:15:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:05,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:05,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905567146] [2023-09-01 02:15:05,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905567146] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:05,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:05,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 02:15:05,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897266756] [2023-09-01 02:15:05,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:05,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:15:05,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:05,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:15:05,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:15:06,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 434 [2023-09-01 02:15:06,041 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) [2023-09-01 02:15:06,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:06,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 434 [2023-09-01 02:15:06,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:08,094 INFO L130 PetriNetUnfolder]: 12263/20716 cut-off events. [2023-09-01 02:15:08,095 INFO L131 PetriNetUnfolder]: For 27952/28208 co-relation queries the response was YES. [2023-09-01 02:15:08,143 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. [2023-09-01 02:15:08,207 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 134 selfloop transitions, 36 changer transitions 0/213 dead transitions. [2023-09-01 02:15:08,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 213 transitions, 1542 flow [2023-09-01 02:15:08,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:15:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:15:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 988 transitions. [2023-09-01 02:15:08,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691244239631337 [2023-09-01 02:15:08,209 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 988 transitions. [2023-09-01 02:15:08,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 988 transitions. [2023-09-01 02:15:08,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:08,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 988 transitions. [2023-09-01 02:15:08,211 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) [2023-09-01 02:15:08,214 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) [2023-09-01 02:15:08,214 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) [2023-09-01 02:15:08,214 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 890 flow. Second operand 4 states and 988 transitions. [2023-09-01 02:15:08,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 213 transitions, 1542 flow [2023-09-01 02:15:08,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 213 transitions, 1486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 02:15:08,227 INFO L231 Difference]: Finished difference. Result has 114 places, 153 transitions, 1134 flow [2023-09-01 02:15:08,227 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} [2023-09-01 02:15:08,228 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -2 predicate places. [2023-09-01 02:15:08,228 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 153 transitions, 1134 flow [2023-09-01 02:15:08,228 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) [2023-09-01 02:15:08,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:08,229 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] [2023-09-01 02:15:08,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 02:15:08,229 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:08,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:08,230 INFO L85 PathProgramCache]: Analyzing trace with hash -293255352, now seen corresponding path program 1 times [2023-09-01 02:15:08,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:08,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030462981] [2023-09-01 02:15:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:08,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:08,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:08,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030462981] [2023-09-01 02:15:08,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030462981] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:08,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:08,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:15:08,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201628271] [2023-09-01 02:15:08,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:08,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 02:15:08,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 02:15:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 02:15:08,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 434 [2023-09-01 02:15:08,370 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) [2023-09-01 02:15:08,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:08,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 434 [2023-09-01 02:15:08,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:10,005 INFO L130 PetriNetUnfolder]: 11362/18840 cut-off events. [2023-09-01 02:15:10,005 INFO L131 PetriNetUnfolder]: For 34235/34483 co-relation queries the response was YES. [2023-09-01 02:15:10,083 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. [2023-09-01 02:15:10,148 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 157 selfloop transitions, 4 changer transitions 0/210 dead transitions. [2023-09-01 02:15:10,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 210 transitions, 1788 flow [2023-09-01 02:15:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 02:15:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 02:15:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1030 transitions. [2023-09-01 02:15:10,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933179723502304 [2023-09-01 02:15:10,150 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1030 transitions. [2023-09-01 02:15:10,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1030 transitions. [2023-09-01 02:15:10,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:10,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1030 transitions. [2023-09-01 02:15:10,153 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) [2023-09-01 02:15:10,155 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) [2023-09-01 02:15:10,156 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) [2023-09-01 02:15:10,156 INFO L175 Difference]: Start difference. First operand has 114 places, 153 transitions, 1134 flow. Second operand 4 states and 1030 transitions. [2023-09-01 02:15:10,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 210 transitions, 1788 flow [2023-09-01 02:15:10,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 210 transitions, 1782 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-09-01 02:15:10,188 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1140 flow [2023-09-01 02:15:10,189 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} [2023-09-01 02:15:10,189 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 2 predicate places. [2023-09-01 02:15:10,189 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1140 flow [2023-09-01 02:15:10,190 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) [2023-09-01 02:15:10,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:10,191 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] [2023-09-01 02:15:10,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 02:15:10,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:10,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash 74643931, now seen corresponding path program 1 times [2023-09-01 02:15:10,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:10,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711516154] [2023-09-01 02:15:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:10,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:10,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711516154] [2023-09-01 02:15:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711516154] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:10,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:10,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:15:10,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891422337] [2023-09-01 02:15:10,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:15:10,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:15:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:15:10,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 434 [2023-09-01 02:15:10,530 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) [2023-09-01 02:15:10,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:10,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 434 [2023-09-01 02:15:10,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:11,897 INFO L130 PetriNetUnfolder]: 10745/17736 cut-off events. [2023-09-01 02:15:11,898 INFO L131 PetriNetUnfolder]: For 34188/34404 co-relation queries the response was YES. [2023-09-01 02:15:11,991 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. [2023-09-01 02:15:12,058 INFO L137 encePairwiseOnDemand]: 424/434 looper letters, 129 selfloop transitions, 43 changer transitions 0/213 dead transitions. [2023-09-01 02:15:12,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 213 transitions, 1672 flow [2023-09-01 02:15:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 02:15:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 02:15:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1188 transitions. [2023-09-01 02:15:12,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474654377880185 [2023-09-01 02:15:12,209 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1188 transitions. [2023-09-01 02:15:12,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1188 transitions. [2023-09-01 02:15:12,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:12,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1188 transitions. [2023-09-01 02:15:12,211 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) [2023-09-01 02:15:12,213 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) [2023-09-01 02:15:12,213 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) [2023-09-01 02:15:12,213 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1140 flow. Second operand 5 states and 1188 transitions. [2023-09-01 02:15:12,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 213 transitions, 1672 flow [2023-09-01 02:15:12,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 213 transitions, 1658 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 02:15:12,234 INFO L231 Difference]: Finished difference. Result has 121 places, 155 transitions, 1297 flow [2023-09-01 02:15:12,234 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} [2023-09-01 02:15:12,235 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 5 predicate places. [2023-09-01 02:15:12,235 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 155 transitions, 1297 flow [2023-09-01 02:15:12,235 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) [2023-09-01 02:15:12,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:12,236 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] [2023-09-01 02:15:12,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 02:15:12,236 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:12,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash -836730111, now seen corresponding path program 1 times [2023-09-01 02:15:12,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:12,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403301347] [2023-09-01 02:15:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:12,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:12,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:12,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403301347] [2023-09-01 02:15:12,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403301347] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:12,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:12,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:15:12,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664054251] [2023-09-01 02:15:12,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:12,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:15:12,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:12,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:15:12,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:15:12,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 434 [2023-09-01 02:15:12,691 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) [2023-09-01 02:15:12,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:12,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 434 [2023-09-01 02:15:12,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:14,226 INFO L130 PetriNetUnfolder]: 10269/17039 cut-off events. [2023-09-01 02:15:14,226 INFO L131 PetriNetUnfolder]: For 40911/41045 co-relation queries the response was YES. [2023-09-01 02:15:14,277 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. [2023-09-01 02:15:14,331 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 167 selfloop transitions, 54 changer transitions 2/269 dead transitions. [2023-09-01 02:15:14,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 269 transitions, 2199 flow [2023-09-01 02:15:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:15:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:15:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1449 transitions. [2023-09-01 02:15:14,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2023-09-01 02:15:14,333 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1449 transitions. [2023-09-01 02:15:14,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1449 transitions. [2023-09-01 02:15:14,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:14,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1449 transitions. [2023-09-01 02:15:14,335 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) [2023-09-01 02:15:14,338 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) [2023-09-01 02:15:14,338 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) [2023-09-01 02:15:14,338 INFO L175 Difference]: Start difference. First operand has 121 places, 155 transitions, 1297 flow. Second operand 6 states and 1449 transitions. [2023-09-01 02:15:14,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 269 transitions, 2199 flow [2023-09-01 02:15:14,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 269 transitions, 2160 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 02:15:14,370 INFO L231 Difference]: Finished difference. Result has 129 places, 169 transitions, 1626 flow [2023-09-01 02:15:14,371 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} [2023-09-01 02:15:14,371 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 13 predicate places. [2023-09-01 02:15:14,371 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 169 transitions, 1626 flow [2023-09-01 02:15:14,372 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) [2023-09-01 02:15:14,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:14,372 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] [2023-09-01 02:15:14,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 02:15:14,372 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:14,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash -150664238, now seen corresponding path program 1 times [2023-09-01 02:15:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:14,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799137379] [2023-09-01 02:15:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:14,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:14,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:14,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799137379] [2023-09-01 02:15:14,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799137379] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:14,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:14,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 02:15:14,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431916313] [2023-09-01 02:15:14,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:14,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:15:14,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:15:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:15:14,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 434 [2023-09-01 02:15:14,754 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) [2023-09-01 02:15:14,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:14,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 434 [2023-09-01 02:15:14,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:16,453 INFO L130 PetriNetUnfolder]: 10412/17849 cut-off events. [2023-09-01 02:15:16,453 INFO L131 PetriNetUnfolder]: For 52071/52296 co-relation queries the response was YES. [2023-09-01 02:15:16,525 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. [2023-09-01 02:15:16,583 INFO L137 encePairwiseOnDemand]: 423/434 looper letters, 186 selfloop transitions, 65 changer transitions 1/301 dead transitions. [2023-09-01 02:15:16,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 301 transitions, 2908 flow [2023-09-01 02:15:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:15:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:15:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1450 transitions. [2023-09-01 02:15:16,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568356374807988 [2023-09-01 02:15:16,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1450 transitions. [2023-09-01 02:15:16,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1450 transitions. [2023-09-01 02:15:16,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:16,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1450 transitions. [2023-09-01 02:15:16,587 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) [2023-09-01 02:15:16,590 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) [2023-09-01 02:15:16,590 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) [2023-09-01 02:15:16,590 INFO L175 Difference]: Start difference. First operand has 129 places, 169 transitions, 1626 flow. Second operand 6 states and 1450 transitions. [2023-09-01 02:15:16,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 301 transitions, 2908 flow [2023-09-01 02:15:16,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 301 transitions, 2863 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 02:15:16,648 INFO L231 Difference]: Finished difference. Result has 137 places, 197 transitions, 2284 flow [2023-09-01 02:15:16,649 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} [2023-09-01 02:15:16,649 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 21 predicate places. [2023-09-01 02:15:16,649 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 197 transitions, 2284 flow [2023-09-01 02:15:16,649 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) [2023-09-01 02:15:16,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:16,649 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] [2023-09-01 02:15:16,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 02:15:16,650 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:16,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:16,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1772113238, now seen corresponding path program 1 times [2023-09-01 02:15:16,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:16,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195591857] [2023-09-01 02:15:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:16,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:16,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:16,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195591857] [2023-09-01 02:15:16,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195591857] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:16,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:16,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:15:16,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204255717] [2023-09-01 02:15:16,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:16,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:15:16,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:16,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:15:16,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:15:17,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 434 [2023-09-01 02:15:17,168 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) [2023-09-01 02:15:17,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:17,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 434 [2023-09-01 02:15:17,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:18,902 INFO L130 PetriNetUnfolder]: 10258/17476 cut-off events. [2023-09-01 02:15:18,902 INFO L131 PetriNetUnfolder]: For 63357/63505 co-relation queries the response was YES. [2023-09-01 02:15:18,989 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. [2023-09-01 02:15:19,054 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 159 selfloop transitions, 85 changer transitions 1/292 dead transitions. [2023-09-01 02:15:19,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 292 transitions, 3206 flow [2023-09-01 02:15:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 02:15:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 02:15:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1835 transitions. [2023-09-01 02:15:19,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285138248847926 [2023-09-01 02:15:19,058 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1835 transitions. [2023-09-01 02:15:19,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1835 transitions. [2023-09-01 02:15:19,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:19,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1835 transitions. [2023-09-01 02:15:19,062 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) [2023-09-01 02:15:19,066 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) [2023-09-01 02:15:19,067 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) [2023-09-01 02:15:19,067 INFO L175 Difference]: Start difference. First operand has 137 places, 197 transitions, 2284 flow. Second operand 8 states and 1835 transitions. [2023-09-01 02:15:19,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 292 transitions, 3206 flow [2023-09-01 02:15:19,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 292 transitions, 3198 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-09-01 02:15:19,180 INFO L231 Difference]: Finished difference. Result has 148 places, 209 transitions, 2764 flow [2023-09-01 02:15:19,180 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} [2023-09-01 02:15:19,181 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 32 predicate places. [2023-09-01 02:15:19,181 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 2764 flow [2023-09-01 02:15:19,182 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) [2023-09-01 02:15:19,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:19,182 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] [2023-09-01 02:15:19,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 02:15:19,182 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:19,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash -375622696, now seen corresponding path program 1 times [2023-09-01 02:15:19,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:19,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803926198] [2023-09-01 02:15:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:19,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:19,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803926198] [2023-09-01 02:15:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803926198] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:19,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:19,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:15:19,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440598808] [2023-09-01 02:15:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:19,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:15:19,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:15:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:15:19,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 434 [2023-09-01 02:15:19,598 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) [2023-09-01 02:15:19,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:19,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 434 [2023-09-01 02:15:19,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:21,531 INFO L130 PetriNetUnfolder]: 10575/18352 cut-off events. [2023-09-01 02:15:21,531 INFO L131 PetriNetUnfolder]: For 89448/89649 co-relation queries the response was YES. [2023-09-01 02:15:21,669 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. [2023-09-01 02:15:21,740 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 191 selfloop transitions, 94 changer transitions 5/340 dead transitions. [2023-09-01 02:15:21,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 340 transitions, 4112 flow [2023-09-01 02:15:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:15:21,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:15:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2069 transitions. [2023-09-01 02:15:21,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296979006656426 [2023-09-01 02:15:21,744 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2069 transitions. [2023-09-01 02:15:21,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2069 transitions. [2023-09-01 02:15:21,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:21,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2069 transitions. [2023-09-01 02:15:21,747 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) [2023-09-01 02:15:21,751 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) [2023-09-01 02:15:21,752 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) [2023-09-01 02:15:21,752 INFO L175 Difference]: Start difference. First operand has 148 places, 209 transitions, 2764 flow. Second operand 9 states and 2069 transitions. [2023-09-01 02:15:21,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 340 transitions, 4112 flow [2023-09-01 02:15:21,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 340 transitions, 4029 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-09-01 02:15:21,967 INFO L231 Difference]: Finished difference. Result has 157 places, 226 transitions, 3362 flow [2023-09-01 02:15:21,967 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} [2023-09-01 02:15:21,968 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 41 predicate places. [2023-09-01 02:15:21,968 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 226 transitions, 3362 flow [2023-09-01 02:15:21,969 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) [2023-09-01 02:15:21,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:21,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:15:21,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 02:15:21,969 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:21,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash -986500360, now seen corresponding path program 1 times [2023-09-01 02:15:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:21,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977730957] [2023-09-01 02:15:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:21,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:22,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:22,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977730957] [2023-09-01 02:15:22,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977730957] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:22,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:22,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 02:15:22,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449892318] [2023-09-01 02:15:22,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:22,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 02:15:22,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:22,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 02:15:22,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 02:15:22,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 434 [2023-09-01 02:15:22,278 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) [2023-09-01 02:15:22,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:22,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 434 [2023-09-01 02:15:22,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:24,249 INFO L130 PetriNetUnfolder]: 10700/18863 cut-off events. [2023-09-01 02:15:24,249 INFO L131 PetriNetUnfolder]: For 108850/108960 co-relation queries the response was YES. [2023-09-01 02:15:24,391 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. [2023-09-01 02:15:24,468 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 187 selfloop transitions, 93 changer transitions 0/324 dead transitions. [2023-09-01 02:15:24,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 324 transitions, 4473 flow [2023-09-01 02:15:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:15:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:15:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1450 transitions. [2023-09-01 02:15:24,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568356374807988 [2023-09-01 02:15:24,470 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1450 transitions. [2023-09-01 02:15:24,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1450 transitions. [2023-09-01 02:15:24,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:24,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1450 transitions. [2023-09-01 02:15:24,473 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) [2023-09-01 02:15:24,476 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) [2023-09-01 02:15:24,477 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) [2023-09-01 02:15:24,477 INFO L175 Difference]: Start difference. First operand has 157 places, 226 transitions, 3362 flow. Second operand 6 states and 1450 transitions. [2023-09-01 02:15:24,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 324 transitions, 4473 flow [2023-09-01 02:15:24,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 324 transitions, 4404 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-09-01 02:15:24,700 INFO L231 Difference]: Finished difference. Result has 162 places, 238 transitions, 3866 flow [2023-09-01 02:15:24,700 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} [2023-09-01 02:15:24,701 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 46 predicate places. [2023-09-01 02:15:24,701 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 238 transitions, 3866 flow [2023-09-01 02:15:24,701 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) [2023-09-01 02:15:24,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:24,702 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] [2023-09-01 02:15:24,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 02:15:24,702 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:24,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:24,702 INFO L85 PathProgramCache]: Analyzing trace with hash 598141091, now seen corresponding path program 1 times [2023-09-01 02:15:24,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:24,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805922305] [2023-09-01 02:15:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:24,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:24,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805922305] [2023-09-01 02:15:24,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805922305] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:24,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:24,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:15:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57219059] [2023-09-01 02:15:24,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:24,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:15:24,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:15:24,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:15:25,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-09-01 02:15:25,133 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) [2023-09-01 02:15:25,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:25,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-09-01 02:15:25,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:28,804 INFO L130 PetriNetUnfolder]: 19499/32604 cut-off events. [2023-09-01 02:15:28,805 INFO L131 PetriNetUnfolder]: For 203362/203510 co-relation queries the response was YES. [2023-09-01 02:15:29,131 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. [2023-09-01 02:15:29,254 INFO L137 encePairwiseOnDemand]: 417/434 looper letters, 282 selfloop transitions, 129 changer transitions 0/447 dead transitions. [2023-09-01 02:15:29,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 447 transitions, 6579 flow [2023-09-01 02:15:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:15:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:15:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2123 transitions. [2023-09-01 02:15:29,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435227854582694 [2023-09-01 02:15:29,257 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2123 transitions. [2023-09-01 02:15:29,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2123 transitions. [2023-09-01 02:15:29,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:29,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2123 transitions. [2023-09-01 02:15:29,260 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) [2023-09-01 02:15:29,263 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) [2023-09-01 02:15:29,263 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) [2023-09-01 02:15:29,263 INFO L175 Difference]: Start difference. First operand has 162 places, 238 transitions, 3866 flow. Second operand 9 states and 2123 transitions. [2023-09-01 02:15:29,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 447 transitions, 6579 flow [2023-09-01 02:15:30,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 447 transitions, 6501 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-09-01 02:15:30,037 INFO L231 Difference]: Finished difference. Result has 175 places, 295 transitions, 5706 flow [2023-09-01 02:15:30,037 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} [2023-09-01 02:15:30,038 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 59 predicate places. [2023-09-01 02:15:30,038 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 295 transitions, 5706 flow [2023-09-01 02:15:30,038 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) [2023-09-01 02:15:30,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:30,038 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] [2023-09-01 02:15:30,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 02:15:30,038 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:30,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:30,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1645307768, now seen corresponding path program 1 times [2023-09-01 02:15:30,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:30,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454318118] [2023-09-01 02:15:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:30,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:30,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:30,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454318118] [2023-09-01 02:15:30,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454318118] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:30,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:30,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:15:30,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144095684] [2023-09-01 02:15:30,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:30,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:15:30,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:15:30,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:15:30,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-09-01 02:15:30,515 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) [2023-09-01 02:15:30,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:30,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-09-01 02:15:30,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:35,387 INFO L130 PetriNetUnfolder]: 20732/35165 cut-off events. [2023-09-01 02:15:35,387 INFO L131 PetriNetUnfolder]: For 275561/275641 co-relation queries the response was YES. [2023-09-01 02:15:35,628 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. [2023-09-01 02:15:35,978 INFO L137 encePairwiseOnDemand]: 415/434 looper letters, 347 selfloop transitions, 200 changer transitions 0/583 dead transitions. [2023-09-01 02:15:35,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 583 transitions, 9029 flow [2023-09-01 02:15:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:15:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:15:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3271 transitions. [2023-09-01 02:15:35,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5383475971033574 [2023-09-01 02:15:35,983 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3271 transitions. [2023-09-01 02:15:35,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3271 transitions. [2023-09-01 02:15:35,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:35,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3271 transitions. [2023-09-01 02:15:35,989 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) [2023-09-01 02:15:35,996 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) [2023-09-01 02:15:35,997 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) [2023-09-01 02:15:35,997 INFO L175 Difference]: Start difference. First operand has 175 places, 295 transitions, 5706 flow. Second operand 14 states and 3271 transitions. [2023-09-01 02:15:35,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 583 transitions, 9029 flow [2023-09-01 02:15:36,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 583 transitions, 9015 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 02:15:36,890 INFO L231 Difference]: Finished difference. Result has 194 places, 353 transitions, 7627 flow [2023-09-01 02:15:36,890 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} [2023-09-01 02:15:36,890 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 78 predicate places. [2023-09-01 02:15:36,890 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 353 transitions, 7627 flow [2023-09-01 02:15:36,891 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) [2023-09-01 02:15:36,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:36,891 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] [2023-09-01 02:15:36,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 02:15:36,891 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:36,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:36,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1644429296, now seen corresponding path program 1 times [2023-09-01 02:15:36,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:36,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115677289] [2023-09-01 02:15:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:36,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:37,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:37,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115677289] [2023-09-01 02:15:37,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115677289] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:37,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:37,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:15:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374231684] [2023-09-01 02:15:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:37,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:15:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:15:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:15:37,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 434 [2023-09-01 02:15:37,273 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) [2023-09-01 02:15:37,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:37,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 434 [2023-09-01 02:15:37,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:44,699 INFO L130 PetriNetUnfolder]: 31019/52251 cut-off events. [2023-09-01 02:15:44,699 INFO L131 PetriNetUnfolder]: For 425657/425985 co-relation queries the response was YES. [2023-09-01 02:15:45,298 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. [2023-09-01 02:15:45,496 INFO L137 encePairwiseOnDemand]: 424/434 looper letters, 348 selfloop transitions, 107 changer transitions 0/517 dead transitions. [2023-09-01 02:15:45,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 517 transitions, 10467 flow [2023-09-01 02:15:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:15:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:15:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1461 transitions. [2023-09-01 02:15:45,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610599078341014 [2023-09-01 02:15:45,498 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1461 transitions. [2023-09-01 02:15:45,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1461 transitions. [2023-09-01 02:15:45,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:45,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1461 transitions. [2023-09-01 02:15:45,500 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) [2023-09-01 02:15:45,502 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) [2023-09-01 02:15:45,502 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) [2023-09-01 02:15:45,502 INFO L175 Difference]: Start difference. First operand has 194 places, 353 transitions, 7627 flow. Second operand 6 states and 1461 transitions. [2023-09-01 02:15:45,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 517 transitions, 10467 flow [2023-09-01 02:15:46,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 517 transitions, 10153 flow, removed 99 selfloop flow, removed 3 redundant places. [2023-09-01 02:15:46,851 INFO L231 Difference]: Finished difference. Result has 199 places, 408 transitions, 9348 flow [2023-09-01 02:15:46,851 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} [2023-09-01 02:15:46,852 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 83 predicate places. [2023-09-01 02:15:46,852 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 408 transitions, 9348 flow [2023-09-01 02:15:46,852 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) [2023-09-01 02:15:46,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:46,852 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] [2023-09-01 02:15:46,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 02:15:46,852 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:46,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash 809977930, now seen corresponding path program 2 times [2023-09-01 02:15:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:46,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161785084] [2023-09-01 02:15:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:47,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:47,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161785084] [2023-09-01 02:15:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161785084] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:47,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:47,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:15:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259087307] [2023-09-01 02:15:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:47,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:15:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:15:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:15:47,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-09-01 02:15:47,323 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) [2023-09-01 02:15:47,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:47,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-09-01 02:15:47,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:15:55,326 INFO L130 PetriNetUnfolder]: 31056/51969 cut-off events. [2023-09-01 02:15:55,326 INFO L131 PetriNetUnfolder]: For 441880/442136 co-relation queries the response was YES. [2023-09-01 02:15:55,834 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. [2023-09-01 02:15:56,026 INFO L137 encePairwiseOnDemand]: 421/434 looper letters, 280 selfloop transitions, 206 changer transitions 0/538 dead transitions. [2023-09-01 02:15:56,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 538 transitions, 10807 flow [2023-09-01 02:15:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 02:15:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 02:15:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1902 transitions. [2023-09-01 02:15:56,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478110599078341 [2023-09-01 02:15:56,028 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1902 transitions. [2023-09-01 02:15:56,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1902 transitions. [2023-09-01 02:15:56,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:15:56,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1902 transitions. [2023-09-01 02:15:56,032 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) [2023-09-01 02:15:56,035 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) [2023-09-01 02:15:56,036 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) [2023-09-01 02:15:56,036 INFO L175 Difference]: Start difference. First operand has 199 places, 408 transitions, 9348 flow. Second operand 8 states and 1902 transitions. [2023-09-01 02:15:56,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 538 transitions, 10807 flow [2023-09-01 02:15:57,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 538 transitions, 10797 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-09-01 02:15:57,411 INFO L231 Difference]: Finished difference. Result has 204 places, 403 transitions, 9679 flow [2023-09-01 02:15:57,412 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} [2023-09-01 02:15:57,412 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 88 predicate places. [2023-09-01 02:15:57,412 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 403 transitions, 9679 flow [2023-09-01 02:15:57,413 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) [2023-09-01 02:15:57,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:15:57,413 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] [2023-09-01 02:15:57,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 02:15:57,413 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:15:57,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:15:57,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1793657168, now seen corresponding path program 2 times [2023-09-01 02:15:57,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:15:57,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456877760] [2023-09-01 02:15:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:15:57,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:15:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:15:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:15:57,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:15:57,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456877760] [2023-09-01 02:15:57,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456877760] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:15:57,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:15:57,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:15:57,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196669234] [2023-09-01 02:15:57,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:15:57,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:15:57,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:15:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:15:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:15:57,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-09-01 02:15:57,857 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) [2023-09-01 02:15:57,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:15:57,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-09-01 02:15:57,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:16:06,509 INFO L130 PetriNetUnfolder]: 33533/56843 cut-off events. [2023-09-01 02:16:06,509 INFO L131 PetriNetUnfolder]: For 592707/592987 co-relation queries the response was YES. [2023-09-01 02:16:07,144 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. [2023-09-01 02:16:07,374 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 348 selfloop transitions, 220 changer transitions 0/624 dead transitions. [2023-09-01 02:16:07,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 624 transitions, 13660 flow [2023-09-01 02:16:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:16:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:16:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2134 transitions. [2023-09-01 02:16:07,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463389656938044 [2023-09-01 02:16:07,376 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2134 transitions. [2023-09-01 02:16:07,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2134 transitions. [2023-09-01 02:16:07,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:07,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2134 transitions. [2023-09-01 02:16:07,379 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) [2023-09-01 02:16:07,382 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) [2023-09-01 02:16:07,383 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) [2023-09-01 02:16:07,383 INFO L175 Difference]: Start difference. First operand has 204 places, 403 transitions, 9679 flow. Second operand 9 states and 2134 transitions. [2023-09-01 02:16:07,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 624 transitions, 13660 flow [2023-09-01 02:16:09,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 624 transitions, 13351 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-09-01 02:16:09,284 INFO L231 Difference]: Finished difference. Result has 211 places, 474 transitions, 12589 flow [2023-09-01 02:16:09,285 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} [2023-09-01 02:16:09,285 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 95 predicate places. [2023-09-01 02:16:09,285 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 474 transitions, 12589 flow [2023-09-01 02:16:09,285 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) [2023-09-01 02:16:09,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:09,286 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] [2023-09-01 02:16:09,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 02:16:09,286 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:16:09,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:09,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1325936182, now seen corresponding path program 3 times [2023-09-01 02:16:09,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:16:09,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144066565] [2023-09-01 02:16:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:09,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:16:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:09,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:16:09,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144066565] [2023-09-01 02:16:09,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144066565] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:16:09,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:16:09,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:16:09,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995472828] [2023-09-01 02:16:09,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:16:09,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:16:09,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:16:09,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:16:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:16:09,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-09-01 02:16:09,753 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) [2023-09-01 02:16:09,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:09,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-09-01 02:16:09,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:16:21,223 INFO L130 PetriNetUnfolder]: 40463/66871 cut-off events. [2023-09-01 02:16:21,223 INFO L131 PetriNetUnfolder]: For 718578/718646 co-relation queries the response was YES. [2023-09-01 02:16:21,971 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. [2023-09-01 02:16:22,230 INFO L137 encePairwiseOnDemand]: 417/434 looper letters, 396 selfloop transitions, 352 changer transitions 0/800 dead transitions. [2023-09-01 02:16:22,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 800 transitions, 17565 flow [2023-09-01 02:16:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:16:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:16:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3274 transitions. [2023-09-01 02:16:22,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388413429888085 [2023-09-01 02:16:22,233 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3274 transitions. [2023-09-01 02:16:22,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3274 transitions. [2023-09-01 02:16:22,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:22,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3274 transitions. [2023-09-01 02:16:22,236 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) [2023-09-01 02:16:22,239 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) [2023-09-01 02:16:22,239 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) [2023-09-01 02:16:22,240 INFO L175 Difference]: Start difference. First operand has 211 places, 474 transitions, 12589 flow. Second operand 14 states and 3274 transitions. [2023-09-01 02:16:22,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 800 transitions, 17565 flow [2023-09-01 02:16:24,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 800 transitions, 17497 flow, removed 34 selfloop flow, removed 0 redundant places. [2023-09-01 02:16:24,418 INFO L231 Difference]: Finished difference. Result has 230 places, 557 transitions, 15822 flow [2023-09-01 02:16:24,419 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} [2023-09-01 02:16:24,420 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 114 predicate places. [2023-09-01 02:16:24,420 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 557 transitions, 15822 flow [2023-09-01 02:16:24,420 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) [2023-09-01 02:16:24,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:24,420 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] [2023-09-01 02:16:24,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 02:16:24,420 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:16:24,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:24,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1023465888, now seen corresponding path program 4 times [2023-09-01 02:16:24,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:16:24,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889681171] [2023-09-01 02:16:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:16:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:24,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:16:24,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889681171] [2023-09-01 02:16:24,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889681171] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:16:24,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:16:24,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:16:24,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896128013] [2023-09-01 02:16:24,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:16:24,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:16:24,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:16:24,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:16:24,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:16:24,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-09-01 02:16:24,881 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) [2023-09-01 02:16:24,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:24,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-09-01 02:16:24,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:16:35,641 INFO L130 PetriNetUnfolder]: 35568/60440 cut-off events. [2023-09-01 02:16:35,642 INFO L131 PetriNetUnfolder]: For 823002/823422 co-relation queries the response was YES. [2023-09-01 02:16:36,403 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. [2023-09-01 02:16:36,654 INFO L137 encePairwiseOnDemand]: 421/434 looper letters, 321 selfloop transitions, 295 changer transitions 0/682 dead transitions. [2023-09-01 02:16:36,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 682 transitions, 17480 flow [2023-09-01 02:16:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 02:16:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 02:16:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1900 transitions. [2023-09-01 02:16:36,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472350230414746 [2023-09-01 02:16:36,657 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1900 transitions. [2023-09-01 02:16:36,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1900 transitions. [2023-09-01 02:16:36,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:36,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1900 transitions. [2023-09-01 02:16:36,660 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) [2023-09-01 02:16:36,663 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) [2023-09-01 02:16:36,663 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) [2023-09-01 02:16:36,664 INFO L175 Difference]: Start difference. First operand has 230 places, 557 transitions, 15822 flow. Second operand 8 states and 1900 transitions. [2023-09-01 02:16:36,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 682 transitions, 17480 flow [2023-09-01 02:16:39,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 682 transitions, 17170 flow, removed 97 selfloop flow, removed 3 redundant places. [2023-09-01 02:16:39,495 INFO L231 Difference]: Finished difference. Result has 231 places, 548 transitions, 15952 flow [2023-09-01 02:16:39,496 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} [2023-09-01 02:16:39,496 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 115 predicate places. [2023-09-01 02:16:39,496 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 548 transitions, 15952 flow [2023-09-01 02:16:39,497 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) [2023-09-01 02:16:39,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:39,497 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] [2023-09-01 02:16:39,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 02:16:39,497 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:16:39,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:39,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1094398370, now seen corresponding path program 1 times [2023-09-01 02:16:39,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:16:39,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289757502] [2023-09-01 02:16:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:39,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:16:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:39,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:16:39,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289757502] [2023-09-01 02:16:39,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289757502] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:16:39,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:16:39,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 02:16:39,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242054037] [2023-09-01 02:16:39,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:16:39,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:16:39,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:16:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:16:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:16:40,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 434 [2023-09-01 02:16:40,171 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) [2023-09-01 02:16:40,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:40,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 434 [2023-09-01 02:16:40,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:16:54,385 INFO L130 PetriNetUnfolder]: 44121/72126 cut-off events. [2023-09-01 02:16:54,385 INFO L131 PetriNetUnfolder]: For 887128/887144 co-relation queries the response was YES. [2023-09-01 02:16:55,238 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. [2023-09-01 02:16:55,513 INFO L137 encePairwiseOnDemand]: 415/434 looper letters, 449 selfloop transitions, 432 changer transitions 0/909 dead transitions. [2023-09-01 02:16:55,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 909 transitions, 20562 flow [2023-09-01 02:16:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 02:16:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 02:16:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5181 transitions. [2023-09-01 02:16:55,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190342616710079 [2023-09-01 02:16:55,517 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5181 transitions. [2023-09-01 02:16:55,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5181 transitions. [2023-09-01 02:16:55,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:16:55,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5181 transitions. [2023-09-01 02:16:55,522 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) [2023-09-01 02:16:55,526 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) [2023-09-01 02:16:55,527 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) [2023-09-01 02:16:55,527 INFO L175 Difference]: Start difference. First operand has 231 places, 548 transitions, 15952 flow. Second operand 23 states and 5181 transitions. [2023-09-01 02:16:55,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 909 transitions, 20562 flow [2023-09-01 02:16:58,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 909 transitions, 19814 flow, removed 43 selfloop flow, removed 7 redundant places. [2023-09-01 02:16:58,489 INFO L231 Difference]: Finished difference. Result has 249 places, 594 transitions, 17371 flow [2023-09-01 02:16:58,489 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} [2023-09-01 02:16:58,490 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 133 predicate places. [2023-09-01 02:16:58,490 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 594 transitions, 17371 flow [2023-09-01 02:16:58,490 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) [2023-09-01 02:16:58,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:16:58,491 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] [2023-09-01 02:16:58,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 02:16:58,491 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:16:58,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:16:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1842512057, now seen corresponding path program 1 times [2023-09-01 02:16:58,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:16:58,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903585095] [2023-09-01 02:16:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:16:58,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:16:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:16:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:16:58,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:16:58,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903585095] [2023-09-01 02:16:58,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903585095] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:16:58,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:16:58,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:16:58,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846530807] [2023-09-01 02:16:58,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:16:58,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:16:58,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:16:58,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:16:58,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:16:58,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-09-01 02:16:58,979 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) [2023-09-01 02:16:58,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:16:58,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-09-01 02:16:58,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:12,588 INFO L130 PetriNetUnfolder]: 43242/70574 cut-off events. [2023-09-01 02:17:12,589 INFO L131 PetriNetUnfolder]: For 908540/908564 co-relation queries the response was YES. [2023-09-01 02:17:13,299 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. [2023-09-01 02:17:13,562 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 414 selfloop transitions, 372 changer transitions 0/840 dead transitions. [2023-09-01 02:17:13,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 840 transitions, 20687 flow [2023-09-01 02:17:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:17:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:17:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3260 transitions. [2023-09-01 02:17:13,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365371955233706 [2023-09-01 02:17:13,566 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3260 transitions. [2023-09-01 02:17:13,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3260 transitions. [2023-09-01 02:17:13,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:13,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3260 transitions. [2023-09-01 02:17:13,570 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) [2023-09-01 02:17:13,574 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) [2023-09-01 02:17:13,575 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) [2023-09-01 02:17:13,575 INFO L175 Difference]: Start difference. First operand has 249 places, 594 transitions, 17371 flow. Second operand 14 states and 3260 transitions. [2023-09-01 02:17:13,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 840 transitions, 20687 flow [2023-09-01 02:17:17,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 840 transitions, 20067 flow, removed 150 selfloop flow, removed 4 redundant places. [2023-09-01 02:17:17,269 INFO L231 Difference]: Finished difference. Result has 260 places, 603 transitions, 17998 flow [2023-09-01 02:17:17,269 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} [2023-09-01 02:17:17,270 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 144 predicate places. [2023-09-01 02:17:17,270 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 603 transitions, 17998 flow [2023-09-01 02:17:17,270 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) [2023-09-01 02:17:17,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:17,271 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] [2023-09-01 02:17:17,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-09-01 02:17:17,271 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:17:17,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash 811860203, now seen corresponding path program 1 times [2023-09-01 02:17:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:17:17,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085267244] [2023-09-01 02:17:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:17,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:17:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:17,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:17:17,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085267244] [2023-09-01 02:17:17,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085267244] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:17,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:17,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:17:17,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103850625] [2023-09-01 02:17:17,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:17,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:17:17,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:17:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:17:17,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:17:17,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 434 [2023-09-01 02:17:17,728 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) [2023-09-01 02:17:17,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:17,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 434 [2023-09-01 02:17:17,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:17:39,159 INFO L130 PetriNetUnfolder]: 72960/115964 cut-off events. [2023-09-01 02:17:39,159 INFO L131 PetriNetUnfolder]: For 1223284/1223354 co-relation queries the response was YES. [2023-09-01 02:17:40,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420500 conditions, 115964 events. 72960/115964 cut-off events. For 1223284/1223354 co-relation queries the response was YES. Maximal size of possible extension queue 3256. Compared 1064064 event pairs, 17876 based on Foata normal form. 142/107339 useless extension candidates. Maximal degree in co-relation 420437. Up to 34520 conditions per place. [2023-09-01 02:17:41,526 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 475 selfloop transitions, 379 changer transitions 0/896 dead transitions. [2023-09-01 02:17:41,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 896 transitions, 24205 flow [2023-09-01 02:17:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:17:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:17:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2544 transitions. [2023-09-01 02:17:41,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328864683703394 [2023-09-01 02:17:41,529 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2544 transitions. [2023-09-01 02:17:41,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2544 transitions. [2023-09-01 02:17:41,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:17:41,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2544 transitions. [2023-09-01 02:17:41,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 231.27272727272728) internal successors, (2544), 11 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:41,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:41,536 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:41,536 INFO L175 Difference]: Start difference. First operand has 260 places, 603 transitions, 17998 flow. Second operand 11 states and 2544 transitions. [2023-09-01 02:17:41,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 896 transitions, 24205 flow [2023-09-01 02:17:49,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 896 transitions, 24133 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 02:17:49,429 INFO L231 Difference]: Finished difference. Result has 273 places, 704 transitions, 23193 flow [2023-09-01 02:17:49,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=17946, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23193, PETRI_PLACES=273, PETRI_TRANSITIONS=704} [2023-09-01 02:17:49,431 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 157 predicate places. [2023-09-01 02:17:49,431 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 704 transitions, 23193 flow [2023-09-01 02:17:49,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 210.5) internal successors, (1684), 8 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:49,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:17:49,432 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] [2023-09-01 02:17:49,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-09-01 02:17:49,432 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:17:49,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:17:49,433 INFO L85 PathProgramCache]: Analyzing trace with hash 360594652, now seen corresponding path program 2 times [2023-09-01 02:17:49,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:17:49,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550329727] [2023-09-01 02:17:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:17:49,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:17:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:17:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:17:49,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:17:49,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550329727] [2023-09-01 02:17:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550329727] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:17:49,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:17:49,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:17:49,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001237470] [2023-09-01 02:17:49,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:17:49,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:17:49,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:17:49,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:17:49,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:17:49,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-09-01 02:17:49,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 704 transitions, 23193 flow. Second operand has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:17:49,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:17:49,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-09-01 02:17:49,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:18:14,154 INFO L130 PetriNetUnfolder]: 72623/115026 cut-off events. [2023-09-01 02:18:14,155 INFO L131 PetriNetUnfolder]: For 1414286/1414476 co-relation queries the response was YES. [2023-09-01 02:18:15,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433245 conditions, 115026 events. 72623/115026 cut-off events. For 1414286/1414476 co-relation queries the response was YES. Maximal size of possible extension queue 3254. Compared 1051365 event pairs, 28246 based on Foata normal form. 262/105170 useless extension candidates. Maximal degree in co-relation 433176. Up to 70828 conditions per place. [2023-09-01 02:18:16,435 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 408 selfloop transitions, 458 changer transitions 0/916 dead transitions. [2023-09-01 02:18:16,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 916 transitions, 26116 flow [2023-09-01 02:18:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:18:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:18:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3248 transitions. [2023-09-01 02:18:16,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345622119815668 [2023-09-01 02:18:16,438 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3248 transitions. [2023-09-01 02:18:16,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3248 transitions. [2023-09-01 02:18:16,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:18:16,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3248 transitions. [2023-09-01 02:18:16,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 232.0) internal successors, (3248), 14 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:16,447 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) [2023-09-01 02:18:16,448 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) [2023-09-01 02:18:16,448 INFO L175 Difference]: Start difference. First operand has 273 places, 704 transitions, 23193 flow. Second operand 14 states and 3248 transitions. [2023-09-01 02:18:16,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 916 transitions, 26116 flow [2023-09-01 02:18:26,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 916 transitions, 26068 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-09-01 02:18:26,825 INFO L231 Difference]: Finished difference. Result has 286 places, 712 transitions, 24435 flow [2023-09-01 02:18:26,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=23145, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24435, PETRI_PLACES=286, PETRI_TRANSITIONS=712} [2023-09-01 02:18:26,826 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 170 predicate places. [2023-09-01 02:18:26,826 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 712 transitions, 24435 flow [2023-09-01 02:18:26,826 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) [2023-09-01 02:18:26,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:18:26,826 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] [2023-09-01 02:18:26,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-09-01 02:18:26,827 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:18:26,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:18:26,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1012800857, now seen corresponding path program 2 times [2023-09-01 02:18:26,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:18:26,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841964263] [2023-09-01 02:18:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:18:26,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:18:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:18:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:18:26,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:18:26,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841964263] [2023-09-01 02:18:26,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841964263] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:18:26,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:18:26,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 02:18:26,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110392976] [2023-09-01 02:18:26,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:18:26,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 02:18:26,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:18:26,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 02:18:26,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-09-01 02:18:27,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 434 [2023-09-01 02:18:27,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 712 transitions, 24435 flow. Second operand has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:27,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:18:27,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 434 [2023-09-01 02:18:27,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:18:52,519 INFO L130 PetriNetUnfolder]: 74280/120522 cut-off events. [2023-09-01 02:18:52,520 INFO L131 PetriNetUnfolder]: For 1570161/1570735 co-relation queries the response was YES. [2023-09-01 02:18:54,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453531 conditions, 120522 events. 74280/120522 cut-off events. For 1570161/1570735 co-relation queries the response was YES. Maximal size of possible extension queue 3551. Compared 1144760 event pairs, 41474 based on Foata normal form. 44/108482 useless extension candidates. Maximal degree in co-relation 453460. Up to 29244 conditions per place. [2023-09-01 02:18:55,420 INFO L137 encePairwiseOnDemand]: 424/434 looper letters, 536 selfloop transitions, 212 changer transitions 0/843 dead transitions. [2023-09-01 02:18:55,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 843 transitions, 27231 flow [2023-09-01 02:18:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 02:18:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 02:18:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1459 transitions. [2023-09-01 02:18:55,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602918586789555 [2023-09-01 02:18:55,424 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1459 transitions. [2023-09-01 02:18:55,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1459 transitions. [2023-09-01 02:18:55,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:18:55,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1459 transitions. [2023-09-01 02:18:55,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 243.16666666666666) internal successors, (1459), 6 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:18:55,442 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) [2023-09-01 02:18:55,457 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) [2023-09-01 02:18:55,457 INFO L175 Difference]: Start difference. First operand has 286 places, 712 transitions, 24435 flow. Second operand 6 states and 1459 transitions. [2023-09-01 02:18:55,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 843 transitions, 27231 flow [2023-09-01 02:19:09,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 843 transitions, 26493 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-09-01 02:19:09,627 INFO L231 Difference]: Finished difference. Result has 281 places, 736 transitions, 25421 flow [2023-09-01 02:19:09,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=23743, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=25421, PETRI_PLACES=281, PETRI_TRANSITIONS=736} [2023-09-01 02:19:09,628 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 165 predicate places. [2023-09-01 02:19:09,628 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 736 transitions, 25421 flow [2023-09-01 02:19:09,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:09,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:19:09,629 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] [2023-09-01 02:19:09,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-09-01 02:19:09,629 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:19:09,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:19:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash -402064134, now seen corresponding path program 3 times [2023-09-01 02:19:09,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:19:09,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196450000] [2023-09-01 02:19:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:19:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:19:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:19:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:19:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:19:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196450000] [2023-09-01 02:19:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196450000] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:19:09,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:19:09,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 02:19:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662238878] [2023-09-01 02:19:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:19:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:19:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:19:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:19:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:19:10,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 434 [2023-09-01 02:19:10,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 736 transitions, 25421 flow. Second operand has 9 states, 9 states have (on average 208.0) internal successors, (1872), 9 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:10,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:19:10,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 434 [2023-09-01 02:19:10,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:19:38,561 INFO L130 PetriNetUnfolder]: 81184/129933 cut-off events. [2023-09-01 02:19:38,561 INFO L131 PetriNetUnfolder]: For 1647651/1647767 co-relation queries the response was YES. [2023-09-01 02:19:40,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494143 conditions, 129933 events. 81184/129933 cut-off events. For 1647651/1647767 co-relation queries the response was YES. Maximal size of possible extension queue 3714. Compared 1220236 event pairs, 32021 based on Foata normal form. 62/118958 useless extension candidates. Maximal degree in co-relation 494071. Up to 55073 conditions per place. [2023-09-01 02:19:41,423 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 424 selfloop transitions, 511 changer transitions 0/994 dead transitions. [2023-09-01 02:19:41,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 994 transitions, 29752 flow [2023-09-01 02:19:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 02:19:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 02:19:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3172 transitions. [2023-09-01 02:19:41,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220539828834759 [2023-09-01 02:19:41,426 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3172 transitions. [2023-09-01 02:19:41,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3172 transitions. [2023-09-01 02:19:41,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:19:41,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3172 transitions. [2023-09-01 02:19:41,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 226.57142857142858) internal successors, (3172), 14 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:41,434 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) [2023-09-01 02:19:41,434 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) [2023-09-01 02:19:41,434 INFO L175 Difference]: Start difference. First operand has 281 places, 736 transitions, 25421 flow. Second operand 14 states and 3172 transitions. [2023-09-01 02:19:41,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 994 transitions, 29752 flow [2023-09-01 02:19:58,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 994 transitions, 29752 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:19:58,241 INFO L231 Difference]: Finished difference. Result has 298 places, 779 transitions, 28555 flow [2023-09-01 02:19:58,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=25421, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=28555, PETRI_PLACES=298, PETRI_TRANSITIONS=779} [2023-09-01 02:19:58,242 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 182 predicate places. [2023-09-01 02:19:58,242 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 779 transitions, 28555 flow [2023-09-01 02:19:58,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 208.0) internal successors, (1872), 9 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:58,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:19:58,243 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] [2023-09-01 02:19:58,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-09-01 02:19:58,243 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:19:58,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:19:58,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1301768862, now seen corresponding path program 4 times [2023-09-01 02:19:58,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:19:58,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915377125] [2023-09-01 02:19:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:19:58,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:19:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:19:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:19:58,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:19:58,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915377125] [2023-09-01 02:19:58,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915377125] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:19:58,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:19:58,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:19:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664077856] [2023-09-01 02:19:58,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:19:58,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:19:58,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:19:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:19:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:19:58,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 434 [2023-09-01 02:19:58,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 779 transitions, 28555 flow. Second operand has 8 states, 8 states have (on average 212.25) internal successors, (1698), 8 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:19:58,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:19:58,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 434 [2023-09-01 02:19:58,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:20:27,329 INFO L130 PetriNetUnfolder]: 79759/128110 cut-off events. [2023-09-01 02:20:27,329 INFO L131 PetriNetUnfolder]: For 1895140/1895328 co-relation queries the response was YES. [2023-09-01 02:20:29,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499047 conditions, 128110 events. 79759/128110 cut-off events. For 1895140/1895328 co-relation queries the response was YES. Maximal size of possible extension queue 3684. Compared 1209902 event pairs, 28973 based on Foata normal form. 116/117013 useless extension candidates. Maximal degree in co-relation 498971. Up to 30908 conditions per place. [2023-09-01 02:20:29,858 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 503 selfloop transitions, 395 changer transitions 0/972 dead transitions. [2023-09-01 02:20:29,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 972 transitions, 31115 flow [2023-09-01 02:20:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:20:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:20:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2566 transitions. [2023-09-01 02:20:29,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374947633012149 [2023-09-01 02:20:29,860 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2566 transitions. [2023-09-01 02:20:29,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2566 transitions. [2023-09-01 02:20:29,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:20:29,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2566 transitions. [2023-09-01 02:20:29,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 233.27272727272728) internal successors, (2566), 11 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:29,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:29,867 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:29,867 INFO L175 Difference]: Start difference. First operand has 298 places, 779 transitions, 28555 flow. Second operand 11 states and 2566 transitions. [2023-09-01 02:20:29,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 972 transitions, 31115 flow [2023-09-01 02:20:49,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 972 transitions, 30978 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-09-01 02:20:49,975 INFO L231 Difference]: Finished difference. Result has 308 places, 779 transitions, 29381 flow [2023-09-01 02:20:49,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=28418, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=29381, PETRI_PLACES=308, PETRI_TRANSITIONS=779} [2023-09-01 02:20:49,976 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 192 predicate places. [2023-09-01 02:20:49,976 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 779 transitions, 29381 flow [2023-09-01 02:20:49,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 212.25) internal successors, (1698), 8 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:49,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:20:49,977 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] [2023-09-01 02:20:49,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-09-01 02:20:49,977 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:20:49,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:20:49,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1593048551, now seen corresponding path program 3 times [2023-09-01 02:20:49,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:20:49,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526574354] [2023-09-01 02:20:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:20:49,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:20:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:20:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:20:50,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:20:50,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526574354] [2023-09-01 02:20:50,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526574354] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:20:50,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:20:50,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:20:50,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966345570] [2023-09-01 02:20:50,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:20:50,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:20:50,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:20:50,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:20:50,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:20:50,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 434 [2023-09-01 02:20:50,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 779 transitions, 29381 flow. Second operand has 7 states, 7 states have (on average 216.57142857142858) internal successors, (1516), 7 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:20:50,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:20:50,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 434 [2023-09-01 02:20:50,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:21:21,324 INFO L130 PetriNetUnfolder]: 78520/126256 cut-off events. [2023-09-01 02:21:21,325 INFO L131 PetriNetUnfolder]: For 2177266/2177606 co-relation queries the response was YES. [2023-09-01 02:21:23,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518292 conditions, 126256 events. 78520/126256 cut-off events. For 2177266/2177606 co-relation queries the response was YES. Maximal size of possible extension queue 3633. Compared 1188992 event pairs, 41793 based on Foata normal form. 48/114648 useless extension candidates. Maximal degree in co-relation 518214. Up to 52456 conditions per place. [2023-09-01 02:21:24,310 INFO L137 encePairwiseOnDemand]: 421/434 looper letters, 474 selfloop transitions, 405 changer transitions 0/968 dead transitions. [2023-09-01 02:21:24,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 968 transitions, 34238 flow [2023-09-01 02:21:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 02:21:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 02:21:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1902 transitions. [2023-09-01 02:21:24,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478110599078341 [2023-09-01 02:21:24,313 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1902 transitions. [2023-09-01 02:21:24,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1902 transitions. [2023-09-01 02:21:24,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:21:24,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1902 transitions. [2023-09-01 02:21:24,316 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) [2023-09-01 02:21:24,318 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) [2023-09-01 02:21:24,318 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) [2023-09-01 02:21:24,318 INFO L175 Difference]: Start difference. First operand has 308 places, 779 transitions, 29381 flow. Second operand 8 states and 1902 transitions. [2023-09-01 02:21:24,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 968 transitions, 34238 flow [2023-09-01 02:21:45,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 968 transitions, 33384 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-09-01 02:21:45,736 INFO L231 Difference]: Finished difference. Result has 306 places, 827 transitions, 32132 flow [2023-09-01 02:21:45,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=28595, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=32132, PETRI_PLACES=306, PETRI_TRANSITIONS=827} [2023-09-01 02:21:45,737 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 190 predicate places. [2023-09-01 02:21:45,737 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 827 transitions, 32132 flow [2023-09-01 02:21:45,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 216.57142857142858) internal successors, (1516), 7 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:21:45,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:21:45,737 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] [2023-09-01 02:21:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-09-01 02:21:45,738 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:21:45,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:21:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash 233244418, now seen corresponding path program 5 times [2023-09-01 02:21:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:21:45,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032243452] [2023-09-01 02:21:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:21:45,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:21:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:21:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:21:45,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:21:45,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032243452] [2023-09-01 02:21:45,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032243452] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:21:45,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:21:45,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:21:45,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800585954] [2023-09-01 02:21:45,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:21:45,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 02:21:45,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:21:45,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 02:21:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 02:21:46,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 434 [2023-09-01 02:21:46,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 827 transitions, 32132 flow. Second operand has 8 states, 8 states have (on average 212.25) internal successors, (1698), 8 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:21:46,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:21:46,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 434 [2023-09-01 02:21:46,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:22:18,136 INFO L130 PetriNetUnfolder]: 81139/130376 cut-off events. [2023-09-01 02:22:18,136 INFO L131 PetriNetUnfolder]: For 2304052/2304276 co-relation queries the response was YES. [2023-09-01 02:22:20,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532821 conditions, 130376 events. 81139/130376 cut-off events. For 2304052/2304276 co-relation queries the response was YES. Maximal size of possible extension queue 3741. Compared 1234060 event pairs, 39170 based on Foata normal form. 100/118723 useless extension candidates. Maximal degree in co-relation 532743. Up to 38588 conditions per place. [2023-09-01 02:22:20,735 INFO L137 encePairwiseOnDemand]: 420/434 looper letters, 512 selfloop transitions, 444 changer transitions 0/1034 dead transitions. [2023-09-01 02:22:20,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1034 transitions, 34890 flow [2023-09-01 02:22:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:22:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:22:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2581 transitions. [2023-09-01 02:22:20,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406367825722664 [2023-09-01 02:22:20,739 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2581 transitions. [2023-09-01 02:22:20,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2581 transitions. [2023-09-01 02:22:20,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:22:20,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2581 transitions. [2023-09-01 02:22:20,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 234.63636363636363) internal successors, (2581), 11 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:20,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:20,745 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:20,746 INFO L175 Difference]: Start difference. First operand has 306 places, 827 transitions, 32132 flow. Second operand 11 states and 2581 transitions. [2023-09-01 02:22:20,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1034 transitions, 34890 flow [2023-09-01 02:22:39,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 1034 transitions, 34396 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-09-01 02:22:39,759 INFO L231 Difference]: Finished difference. Result has 308 places, 824 transitions, 32472 flow [2023-09-01 02:22:39,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=31564, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=32472, PETRI_PLACES=308, PETRI_TRANSITIONS=824} [2023-09-01 02:22:39,761 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 192 predicate places. [2023-09-01 02:22:39,761 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 824 transitions, 32472 flow [2023-09-01 02:22:39,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 212.25) internal successors, (1698), 8 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:39,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:22:39,762 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] [2023-09-01 02:22:39,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-09-01 02:22:39,762 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:22:39,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:22:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1809814085, now seen corresponding path program 4 times [2023-09-01 02:22:39,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:22:39,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068293496] [2023-09-01 02:22:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:22:39,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:22:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:22:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:22:39,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:22:39,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068293496] [2023-09-01 02:22:39,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068293496] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:22:39,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:22:39,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 02:22:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499796554] [2023-09-01 02:22:39,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:22:39,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 02:22:39,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:22:39,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 02:22:39,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 02:22:40,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 434 [2023-09-01 02:22:40,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 824 transitions, 32472 flow. Second operand has 7 states, 7 states have (on average 214.85714285714286) internal successors, (1504), 7 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:22:40,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:22:40,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 434 [2023-09-01 02:22:40,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:23:14,538 INFO L130 PetriNetUnfolder]: 90658/142664 cut-off events. [2023-09-01 02:23:14,539 INFO L131 PetriNetUnfolder]: For 2434632/2434696 co-relation queries the response was YES. [2023-09-01 02:23:16,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575866 conditions, 142664 events. 90658/142664 cut-off events. For 2434632/2434696 co-relation queries the response was YES. Maximal size of possible extension queue 3969. Compared 1319964 event pairs, 38334 based on Foata normal form. 72/130577 useless extension candidates. Maximal degree in co-relation 575790. Up to 62216 conditions per place. [2023-09-01 02:23:17,421 INFO L137 encePairwiseOnDemand]: 419/434 looper letters, 498 selfloop transitions, 442 changer transitions 0/995 dead transitions. [2023-09-01 02:23:17,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 995 transitions, 36175 flow [2023-09-01 02:23:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:23:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:23:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2113 transitions. [2023-09-01 02:23:17,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409626216077829 [2023-09-01 02:23:17,423 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2113 transitions. [2023-09-01 02:23:17,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2113 transitions. [2023-09-01 02:23:17,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:23:17,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2113 transitions. [2023-09-01 02:23:17,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 234.77777777777777) internal successors, (2113), 9 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:23:17,429 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) [2023-09-01 02:23:17,429 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) [2023-09-01 02:23:17,429 INFO L175 Difference]: Start difference. First operand has 308 places, 824 transitions, 32472 flow. Second operand 9 states and 2113 transitions. [2023-09-01 02:23:17,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 995 transitions, 36175 flow [2023-09-01 02:23:42,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 995 transitions, 35833 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-09-01 02:23:42,811 INFO L231 Difference]: Finished difference. Result has 310 places, 844 transitions, 34580 flow [2023-09-01 02:23:42,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=32060, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=34580, PETRI_PLACES=310, PETRI_TRANSITIONS=844} [2023-09-01 02:23:42,812 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 194 predicate places. [2023-09-01 02:23:42,812 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 844 transitions, 34580 flow [2023-09-01 02:23:42,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 214.85714285714286) internal successors, (1504), 7 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:23:42,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:23:42,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:23:42,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-09-01 02:23:42,813 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:23:42,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:23:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash 51029860, now seen corresponding path program 1 times [2023-09-01 02:23:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:23:42,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116062518] [2023-09-01 02:23:42,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:23:42,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:23:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:23:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:23:43,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:23:43,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116062518] [2023-09-01 02:23:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116062518] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:23:43,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:23:43,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 02:23:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153921136] [2023-09-01 02:23:43,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:23:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 02:23:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:23:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 02:23:43,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-09-01 02:23:43,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 434 [2023-09-01 02:23:43,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 844 transitions, 34580 flow. Second operand has 10 states, 10 states have (on average 205.6) internal successors, (2056), 10 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:23:43,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:23:43,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 434 [2023-09-01 02:23:43,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:24:12,280 INFO L130 PetriNetUnfolder]: 70425/116642 cut-off events. [2023-09-01 02:24:12,280 INFO L131 PetriNetUnfolder]: For 2510974/2511754 co-relation queries the response was YES. [2023-09-01 02:24:13,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508676 conditions, 116642 events. 70425/116642 cut-off events. For 2510974/2511754 co-relation queries the response was YES. Maximal size of possible extension queue 3400. Compared 1135372 event pairs, 43137 based on Foata normal form. 32/104608 useless extension candidates. Maximal degree in co-relation 508601. Up to 75287 conditions per place. [2023-09-01 02:24:14,437 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 440 selfloop transitions, 356 changer transitions 0/934 dead transitions. [2023-09-01 02:24:14,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 934 transitions, 36784 flow [2023-09-01 02:24:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:24:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:24:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2355 transitions. [2023-09-01 02:24:14,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932970255550901 [2023-09-01 02:24:14,439 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2355 transitions. [2023-09-01 02:24:14,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2355 transitions. [2023-09-01 02:24:14,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:24:14,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2355 transitions. [2023-09-01 02:24:14,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 214.0909090909091) internal successors, (2355), 11 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:24:14,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:24:14,446 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:24:14,446 INFO L175 Difference]: Start difference. First operand has 310 places, 844 transitions, 34580 flow. Second operand 11 states and 2355 transitions. [2023-09-01 02:24:14,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 934 transitions, 36784 flow [2023-09-01 02:24:35,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 934 transitions, 35918 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 02:24:35,891 INFO L231 Difference]: Finished difference. Result has 311 places, 849 transitions, 34578 flow [2023-09-01 02:24:35,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=33704, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=34578, PETRI_PLACES=311, PETRI_TRANSITIONS=849} [2023-09-01 02:24:35,891 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 195 predicate places. [2023-09-01 02:24:35,892 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 849 transitions, 34578 flow [2023-09-01 02:24:35,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.6) internal successors, (2056), 10 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:24:35,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:24:35,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:24:35,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-09-01 02:24:35,892 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:24:35,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:24:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1888106630, now seen corresponding path program 1 times [2023-09-01 02:24:35,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:24:35,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194623235] [2023-09-01 02:24:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:24:35,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:24:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:24:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:24:36,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:24:36,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194623235] [2023-09-01 02:24:36,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194623235] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:24:36,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:24:36,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:24:36,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878124996] [2023-09-01 02:24:36,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:24:36,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:24:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:24:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:24:36,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:24:36,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 434 [2023-09-01 02:24:36,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 849 transitions, 34578 flow. Second operand has 9 states, 9 states have (on average 210.33333333333334) internal successors, (1893), 9 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:24:36,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:24:36,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 434 [2023-09-01 02:24:36,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:25:07,752 INFO L130 PetriNetUnfolder]: 80845/130191 cut-off events. [2023-09-01 02:25:07,752 INFO L131 PetriNetUnfolder]: For 2473311/2473631 co-relation queries the response was YES. [2023-09-01 02:25:09,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549529 conditions, 130191 events. 80845/130191 cut-off events. For 2473311/2473631 co-relation queries the response was YES. Maximal size of possible extension queue 3765. Compared 1239578 event pairs, 42953 based on Foata normal form. 33/118452 useless extension candidates. Maximal degree in co-relation 549457. Up to 88857 conditions per place. [2023-09-01 02:25:10,224 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 519 selfloop transitions, 324 changer transitions 0/942 dead transitions. [2023-09-01 02:25:10,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 942 transitions, 36576 flow [2023-09-01 02:25:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 02:25:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 02:25:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2009 transitions. [2023-09-01 02:25:10,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514336917562724 [2023-09-01 02:25:10,226 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2009 transitions. [2023-09-01 02:25:10,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2009 transitions. [2023-09-01 02:25:10,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:25:10,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2009 transitions. [2023-09-01 02:25:10,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.22222222222223) internal successors, (2009), 9 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:25:10,230 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) [2023-09-01 02:25:10,230 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) [2023-09-01 02:25:10,230 INFO L175 Difference]: Start difference. First operand has 311 places, 849 transitions, 34578 flow. Second operand 9 states and 2009 transitions. [2023-09-01 02:25:10,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 942 transitions, 36576 flow [2023-09-01 02:25:30,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 942 transitions, 36009 flow, removed 32 selfloop flow, removed 9 redundant places. [2023-09-01 02:25:30,338 INFO L231 Difference]: Finished difference. Result has 313 places, 845 transitions, 34890 flow [2023-09-01 02:25:30,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=33821, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=34890, PETRI_PLACES=313, PETRI_TRANSITIONS=845} [2023-09-01 02:25:30,339 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 197 predicate places. [2023-09-01 02:25:30,339 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 845 transitions, 34890 flow [2023-09-01 02:25:30,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 210.33333333333334) internal successors, (1893), 9 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:25:30,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:25:30,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:25:30,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-09-01 02:25:30,340 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-09-01 02:25:30,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:25:30,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1867126093, now seen corresponding path program 1 times [2023-09-01 02:25:30,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:25:30,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177989019] [2023-09-01 02:25:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:25:30,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:25:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:25:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:25:30,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:25:30,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177989019] [2023-09-01 02:25:30,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177989019] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:25:30,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:25:30,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:25:30,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359888817] [2023-09-01 02:25:30,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:25:30,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:25:30,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:25:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:25:30,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:25:30,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 434 [2023-09-01 02:25:30,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 845 transitions, 34890 flow. Second operand has 9 states, 9 states have (on average 210.22222222222223) internal successors, (1892), 9 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:25:30,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:25:30,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 434 [2023-09-01 02:25:30,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:25:59,733 INFO L130 PetriNetUnfolder]: 70478/116712 cut-off events. [2023-09-01 02:25:59,733 INFO L131 PetriNetUnfolder]: For 2669483/2670283 co-relation queries the response was YES. [2023-09-01 02:26:01,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506380 conditions, 116712 events. 70478/116712 cut-off events. For 2669483/2670283 co-relation queries the response was YES. Maximal size of possible extension queue 3323. Compared 1134335 event pairs, 29489 based on Foata normal form. 35/104938 useless extension candidates. Maximal degree in co-relation 506308. Up to 75287 conditions per place. [2023-09-01 02:26:02,297 INFO L137 encePairwiseOnDemand]: 426/434 looper letters, 439 selfloop transitions, 352 changer transitions 0/926 dead transitions. [2023-09-01 02:26:02,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 926 transitions, 36853 flow [2023-09-01 02:26:02,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 02:26:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 02:26:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2397 transitions. [2023-09-01 02:26:02,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020946795140343 [2023-09-01 02:26:02,299 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2397 transitions. [2023-09-01 02:26:02,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2397 transitions. [2023-09-01 02:26:02,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:26:02,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2397 transitions. [2023-09-01 02:26:02,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 217.9090909090909) internal successors, (2397), 11 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:26:02,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:26:02,303 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 434.0) internal successors, (5208), 12 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:26:02,303 INFO L175 Difference]: Start difference. First operand has 313 places, 845 transitions, 34890 flow. Second operand 11 states and 2397 transitions. [2023-09-01 02:26:02,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 926 transitions, 36853 flow Killed by 15