./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb8c1938cc441082517c5681097f5f6483a36107a8ec46d723b101297930909d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:56:12,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:56:12,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:56:12,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:56:12,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:56:12,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:56:12,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:56:12,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:56:12,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:56:12,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:56:12,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:56:12,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:56:12,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:56:12,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:56:12,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:56:12,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:56:12,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:56:12,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:56:12,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:56:12,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:56:12,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:56:12,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:56:12,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:56:12,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:56:12,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:56:12,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:56:12,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:56:12,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:56:12,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:56:12,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:56:12,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:56:12,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:56:12,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:56:12,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:56:12,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:56:12,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:56:12,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:56:12,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:56:12,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:56:12,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:56:12,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:56:12,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:56:12,413 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:56:12,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:56:12,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:56:12,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:56:12,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:56:12,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:56:12,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:56:12,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:56:12,416 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:56:12,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:56:12,417 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:56:12,417 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:56:12,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:56:12,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:56:12,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:56:12,418 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:56:12,418 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:56:12,418 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:56:12,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:56:12,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:56:12,419 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:56:12,419 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:56:12,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:56:12,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:56:12,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:56:12,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:56:12,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:56:12,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:56:12,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:56:12,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:56:12,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:56:12,421 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:56:12,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:56:12,421 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:56:12,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8c1938cc441082517c5681097f5f6483a36107a8ec46d723b101297930909d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:56:12,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:56:12,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:56:12,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:56:12,752 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:56:12,752 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:56:12,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-08-29 19:56:13,951 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:56:14,201 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:56:14,204 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-08-29 19:56:14,226 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e64e16b39/ec8bc1bb7abd49ab89e8ccaa128b1659/FLAG990ef43e4 [2023-08-29 19:56:14,235 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e64e16b39/ec8bc1bb7abd49ab89e8ccaa128b1659 [2023-08-29 19:56:14,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:56:14,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:56:14,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:56:14,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:56:14,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:56:14,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5816c730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14, skipping insertion in model container [2023-08-29 19:56:14,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:56:14,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:56:14,560 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i[31163,31176] [2023-08-29 19:56:14,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:56:14,587 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:56:14,643 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i[31163,31176] [2023-08-29 19:56:14,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:56:14,687 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:56:14,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14 WrapperNode [2023-08-29 19:56:14,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:56:14,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:56:14,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:56:14,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:56:14,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,728 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 190 [2023-08-29 19:56:14,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:56:14,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:56:14,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:56:14,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:56:14,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,763 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:56:14,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:56:14,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:56:14,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:56:14,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (1/1) ... [2023-08-29 19:56:14,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:56:14,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:56:14,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:56:14,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:56:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:56:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 19:56:14,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 19:56:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:56:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:56:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:56:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:56:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:56:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:56:14,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:56:14,835 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:56:14,941 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:56:14,942 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:56:15,335 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:56:15,572 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:56:15,573 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 19:56:15,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:56:15 BoogieIcfgContainer [2023-08-29 19:56:15,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:56:15,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:56:15,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:56:15,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:56:15,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:56:14" (1/3) ... [2023-08-29 19:56:15,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd81e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:56:15, skipping insertion in model container [2023-08-29 19:56:15,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:14" (2/3) ... [2023-08-29 19:56:15,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd81e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:56:15, skipping insertion in model container [2023-08-29 19:56:15,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:56:15" (3/3) ... [2023-08-29 19:56:15,582 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-2.i [2023-08-29 19:56:15,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:56:15,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-29 19:56:15,598 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:56:15,697 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:56:15,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:15,785 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-29 19:56:15,786 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:56:15,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-29 19:56:15,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:15,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:15,805 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:56:15,816 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:15,827 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:15,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:15,893 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-29 19:56:15,893 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:56:15,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-29 19:56:15,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 4248 [2023-08-29 19:56:20,907 INFO L134 LiptonReduction]: Checked pairs total: 8906 [2023-08-29 19:56:20,908 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-29 19:56:20,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:56:20,925 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;@51f7c4a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:56:20,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2023-08-29 19:56:20,927 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 19:56:20,927 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:56:20,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:20,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:56:20,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:20,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash 30939, now seen corresponding path program 1 times [2023-08-29 19:56:20,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:20,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826718763] [2023-08-29 19:56:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:21,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:21,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826718763] [2023-08-29 19:56:21,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826718763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:21,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:21,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:56:21,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773130064] [2023-08-29 19:56:21,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:21,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:56:21,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:56:21,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:56:21,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 313 [2023-08-29 19:56:21,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:21,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 313 [2023-08-29 19:56:21,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:21,425 INFO L130 PetriNetUnfolder]: 128/284 cut-off events. [2023-08-29 19:56:21,426 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:56:21,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 284 events. 128/284 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1141 event pairs, 108 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 554. Up to 279 conditions per place. [2023-08-29 19:56:21,430 INFO L137 encePairwiseOnDemand]: 292/313 looper letters, 45 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-29 19:56:21,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 193 flow [2023-08-29 19:56:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-08-29 19:56:21,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249201277955272 [2023-08-29 19:56:21,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-08-29 19:56:21,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-08-29 19:56:21,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:21,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-08-29 19:56:21,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,463 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 147 flow. Second operand 3 states and 399 transitions. [2023-08-29 19:56:21,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 193 flow [2023-08-29 19:56:21,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:56:21,467 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 103 flow [2023-08-29 19:56:21,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-29 19:56:21,471 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -19 predicate places. [2023-08-29 19:56:21,471 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 103 flow [2023-08-29 19:56:21,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:21,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:56:21,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:56:21,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:21,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:21,473 INFO L85 PathProgramCache]: Analyzing trace with hash 30941, now seen corresponding path program 1 times [2023-08-29 19:56:21,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:21,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129347559] [2023-08-29 19:56:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:21,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:21,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:21,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129347559] [2023-08-29 19:56:21,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129347559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:21,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:21,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:56:21,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767375909] [2023-08-29 19:56:21,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:21,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:56:21,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:21,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:56:21,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:56:21,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 313 [2023-08-29 19:56:21,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:21,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 313 [2023-08-29 19:56:21,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:21,697 INFO L130 PetriNetUnfolder]: 172/397 cut-off events. [2023-08-29 19:56:21,697 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:56:21,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 397 events. 172/397 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1608 event pairs, 90 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 787. Up to 205 conditions per place. [2023-08-29 19:56:21,699 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 73 selfloop transitions, 4 changer transitions 1/80 dead transitions. [2023-08-29 19:56:21,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 323 flow [2023-08-29 19:56:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-29 19:56:21,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422790202342918 [2023-08-29 19:56:21,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-29 19:56:21,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-29 19:56:21,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:21,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-29 19:56:21,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,714 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 103 flow. Second operand 3 states and 397 transitions. [2023-08-29 19:56:21,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 323 flow [2023-08-29 19:56:21,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 80 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:56:21,718 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 130 flow [2023-08-29 19:56:21,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-29 19:56:21,719 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 19:56:21,719 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 130 flow [2023-08-29 19:56:21,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:21,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:56:21,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:56:21,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:21,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash 29758463, now seen corresponding path program 1 times [2023-08-29 19:56:21,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:21,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303856061] [2023-08-29 19:56:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:21,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:21,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:21,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303856061] [2023-08-29 19:56:21,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303856061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:21,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:21,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766136170] [2023-08-29 19:56:21,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:21,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:56:21,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:56:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:56:21,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 313 [2023-08-29 19:56:21,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:21,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:21,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 313 [2023-08-29 19:56:21,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:22,164 INFO L130 PetriNetUnfolder]: 169/410 cut-off events. [2023-08-29 19:56:22,165 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-29 19:56:22,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 410 events. 169/410 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1785 event pairs, 110 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 948. Up to 238 conditions per place. [2023-08-29 19:56:22,167 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 70 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-29 19:56:22,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 334 flow [2023-08-29 19:56:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-29 19:56:22,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132055378061768 [2023-08-29 19:56:22,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-29 19:56:22,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-29 19:56:22,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:22,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-29 19:56:22,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,174 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 130 flow. Second operand 3 states and 388 transitions. [2023-08-29 19:56:22,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 334 flow [2023-08-29 19:56:22,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:56:22,177 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 139 flow [2023-08-29 19:56:22,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-08-29 19:56:22,177 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-08-29 19:56:22,178 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 139 flow [2023-08-29 19:56:22,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:22,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:56:22,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:56:22,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:22,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:22,179 INFO L85 PathProgramCache]: Analyzing trace with hash 29758586, now seen corresponding path program 1 times [2023-08-29 19:56:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:22,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015140823] [2023-08-29 19:56:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:22,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:22,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:22,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015140823] [2023-08-29 19:56:22,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015140823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:22,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:22,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:22,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62059001] [2023-08-29 19:56:22,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:22,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:56:22,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:22,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:56:22,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:56:22,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 313 [2023-08-29 19:56:22,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:22,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 313 [2023-08-29 19:56:22,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:22,467 INFO L130 PetriNetUnfolder]: 159/397 cut-off events. [2023-08-29 19:56:22,468 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-29 19:56:22,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 397 events. 159/397 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1742 event pairs, 127 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 895. Up to 370 conditions per place. [2023-08-29 19:56:22,470 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 44 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-29 19:56:22,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 223 flow [2023-08-29 19:56:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-29 19:56:22,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39403620873269435 [2023-08-29 19:56:22,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-29 19:56:22,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-29 19:56:22,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:22,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-29 19:56:22,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,477 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 139 flow. Second operand 3 states and 370 transitions. [2023-08-29 19:56:22,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 223 flow [2023-08-29 19:56:22,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:56:22,479 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 132 flow [2023-08-29 19:56:22,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-29 19:56:22,480 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -20 predicate places. [2023-08-29 19:56:22,480 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 132 flow [2023-08-29 19:56:22,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:22,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:56:22,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:56:22,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:22,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:22,481 INFO L85 PathProgramCache]: Analyzing trace with hash 29758464, now seen corresponding path program 1 times [2023-08-29 19:56:22,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:22,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141253097] [2023-08-29 19:56:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:22,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:22,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:22,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141253097] [2023-08-29 19:56:22,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141253097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:22,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:22,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:22,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494625194] [2023-08-29 19:56:22,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:22,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:56:22,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:22,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:56:22,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:56:22,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 313 [2023-08-29 19:56:22,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:22,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 313 [2023-08-29 19:56:22,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:22,716 INFO L130 PetriNetUnfolder]: 155/387 cut-off events. [2023-08-29 19:56:22,717 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-08-29 19:56:22,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 387 events. 155/387 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1700 event pairs, 123 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 867. Up to 360 conditions per place. [2023-08-29 19:56:22,719 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-29 19:56:22,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 214 flow [2023-08-29 19:56:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-29 19:56:22,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40042598509052185 [2023-08-29 19:56:22,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-29 19:56:22,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-29 19:56:22,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:22,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-29 19:56:22,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,726 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 132 flow. Second operand 3 states and 376 transitions. [2023-08-29 19:56:22,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 214 flow [2023-08-29 19:56:22,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:56:22,729 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 129 flow [2023-08-29 19:56:22,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-29 19:56:22,731 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -21 predicate places. [2023-08-29 19:56:22,731 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 129 flow [2023-08-29 19:56:22,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:22,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:56:22,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:56:22,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:22,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash 922513359, now seen corresponding path program 1 times [2023-08-29 19:56:22,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:22,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752648195] [2023-08-29 19:56:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:22,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:22,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752648195] [2023-08-29 19:56:22,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752648195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:22,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:22,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:22,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183991044] [2023-08-29 19:56:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:22,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:56:22,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:56:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:56:22,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:56:22,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:22,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:22,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:56:22,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:23,023 INFO L130 PetriNetUnfolder]: 154/362 cut-off events. [2023-08-29 19:56:23,025 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 19:56:23,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 362 events. 154/362 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1473 event pairs, 72 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 814. Up to 137 conditions per place. [2023-08-29 19:56:23,027 INFO L137 encePairwiseOnDemand]: 304/313 looper letters, 60 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2023-08-29 19:56:23,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 319 flow [2023-08-29 19:56:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:56:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:56:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-29 19:56:23,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793929712460064 [2023-08-29 19:56:23,030 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-29 19:56:23,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-29 19:56:23,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:23,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-29 19:56:23,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,035 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,036 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 129 flow. Second operand 4 states and 475 transitions. [2023-08-29 19:56:23,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 319 flow [2023-08-29 19:56:23,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:56:23,040 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 168 flow [2023-08-29 19:56:23,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-29 19:56:23,043 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-08-29 19:56:23,043 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 168 flow [2023-08-29 19:56:23,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:23,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:23,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:56:23,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:23,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1775671262, now seen corresponding path program 1 times [2023-08-29 19:56:23,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:23,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819140243] [2023-08-29 19:56:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:23,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:23,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819140243] [2023-08-29 19:56:23,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819140243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:23,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:23,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:23,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202679779] [2023-08-29 19:56:23,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:23,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:56:23,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:23,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:56:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:56:23,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 313 [2023-08-29 19:56:23,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:23,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 313 [2023-08-29 19:56:23,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:23,171 INFO L130 PetriNetUnfolder]: 151/371 cut-off events. [2023-08-29 19:56:23,171 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-08-29 19:56:23,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 371 events. 151/371 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1565 event pairs, 50 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 910. Up to 338 conditions per place. [2023-08-29 19:56:23,173 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 42 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-29 19:56:23,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 260 flow [2023-08-29 19:56:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-29 19:56:23,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014909478168264 [2023-08-29 19:56:23,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-29 19:56:23,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-29 19:56:23,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:23,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-29 19:56:23,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,179 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 168 flow. Second operand 3 states and 377 transitions. [2023-08-29 19:56:23,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 260 flow [2023-08-29 19:56:23,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 255 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 19:56:23,181 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 165 flow [2023-08-29 19:56:23,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-08-29 19:56:23,182 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-08-29 19:56:23,182 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 165 flow [2023-08-29 19:56:23,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:23,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:23,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:56:23,183 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:23,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash -898009828, now seen corresponding path program 1 times [2023-08-29 19:56:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:23,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327071061] [2023-08-29 19:56:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:23,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:23,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:23,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327071061] [2023-08-29 19:56:23,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327071061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:23,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:23,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:23,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794586335] [2023-08-29 19:56:23,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:23,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:56:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:56:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:56:23,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 313 [2023-08-29 19:56:23,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:23,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 313 [2023-08-29 19:56:23,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:23,509 INFO L130 PetriNetUnfolder]: 146/357 cut-off events. [2023-08-29 19:56:23,509 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-08-29 19:56:23,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 357 events. 146/357 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1490 event pairs, 112 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 881. Up to 334 conditions per place. [2023-08-29 19:56:23,511 INFO L137 encePairwiseOnDemand]: 311/313 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-29 19:56:23,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 245 flow [2023-08-29 19:56:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-29 19:56:23,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951011714589989 [2023-08-29 19:56:23,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-29 19:56:23,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-29 19:56:23,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:23,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-29 19:56:23,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,517 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 165 flow. Second operand 3 states and 371 transitions. [2023-08-29 19:56:23,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 245 flow [2023-08-29 19:56:23,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 241 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:56:23,519 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 161 flow [2023-08-29 19:56:23,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-29 19:56:23,521 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-08-29 19:56:23,521 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 161 flow [2023-08-29 19:56:23,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:23,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:23,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:56:23,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:23,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2068501142, now seen corresponding path program 1 times [2023-08-29 19:56:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:23,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484574947] [2023-08-29 19:56:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:23,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:23,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484574947] [2023-08-29 19:56:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484574947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:23,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:56:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079056724] [2023-08-29 19:56:23,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:23,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:56:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:56:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:56:23,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 313 [2023-08-29 19:56:23,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:23,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 313 [2023-08-29 19:56:23,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:23,842 INFO L130 PetriNetUnfolder]: 134/316 cut-off events. [2023-08-29 19:56:23,843 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2023-08-29 19:56:23,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 316 events. 134/316 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1205 event pairs, 48 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 789. Up to 135 conditions per place. [2023-08-29 19:56:23,845 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 51 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2023-08-29 19:56:23,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 327 flow [2023-08-29 19:56:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:56:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:56:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 485 transitions. [2023-08-29 19:56:23,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38738019169329074 [2023-08-29 19:56:23,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 485 transitions. [2023-08-29 19:56:23,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 485 transitions. [2023-08-29 19:56:23,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:23,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 485 transitions. [2023-08-29 19:56:23,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,850 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,851 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 161 flow. Second operand 4 states and 485 transitions. [2023-08-29 19:56:23,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 327 flow [2023-08-29 19:56:23,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:56:23,853 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 196 flow [2023-08-29 19:56:23,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-08-29 19:56:23,853 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 19:56:23,853 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 196 flow [2023-08-29 19:56:23,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:23,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:23,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:56:23,854 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:23,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:23,854 INFO L85 PathProgramCache]: Analyzing trace with hash 740294123, now seen corresponding path program 1 times [2023-08-29 19:56:23,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:23,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523977885] [2023-08-29 19:56:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:23,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:23,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:23,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523977885] [2023-08-29 19:56:23,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523977885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:23,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:23,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:23,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426920265] [2023-08-29 19:56:23,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:23,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:56:23,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:23,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:56:23,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:56:23,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 313 [2023-08-29 19:56:23,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:23,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:23,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 313 [2023-08-29 19:56:23,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:23,999 INFO L130 PetriNetUnfolder]: 131/313 cut-off events. [2023-08-29 19:56:24,000 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-29 19:56:24,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 313 events. 131/313 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1215 event pairs, 56 based on Foata normal form. 3/220 useless extension candidates. Maximal degree in co-relation 836. Up to 261 conditions per place. [2023-08-29 19:56:24,002 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 43 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-08-29 19:56:24,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 300 flow [2023-08-29 19:56:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-29 19:56:24,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40042598509052185 [2023-08-29 19:56:24,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-29 19:56:24,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-29 19:56:24,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:24,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-29 19:56:24,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,008 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 196 flow. Second operand 3 states and 376 transitions. [2023-08-29 19:56:24,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 300 flow [2023-08-29 19:56:24,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 292 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 19:56:24,010 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 196 flow [2023-08-29 19:56:24,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-29 19:56:24,012 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -15 predicate places. [2023-08-29 19:56:24,012 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 196 flow [2023-08-29 19:56:24,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:24,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:24,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:56:24,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:24,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:24,013 INFO L85 PathProgramCache]: Analyzing trace with hash 740445031, now seen corresponding path program 1 times [2023-08-29 19:56:24,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:24,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241682980] [2023-08-29 19:56:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:24,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:24,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:24,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241682980] [2023-08-29 19:56:24,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241682980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:24,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:24,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:56:24,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21940670] [2023-08-29 19:56:24,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:24,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:56:24,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:24,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:56:24,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:56:24,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 313 [2023-08-29 19:56:24,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:24,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 313 [2023-08-29 19:56:24,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:24,272 INFO L130 PetriNetUnfolder]: 137/336 cut-off events. [2023-08-29 19:56:24,272 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-29 19:56:24,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 336 events. 137/336 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1284 event pairs, 20 based on Foata normal form. 3/242 useless extension candidates. Maximal degree in co-relation 887. Up to 202 conditions per place. [2023-08-29 19:56:24,275 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 61 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-29 19:56:24,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 387 flow [2023-08-29 19:56:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:56:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:56:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 676 transitions. [2023-08-29 19:56:24,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3599574014909478 [2023-08-29 19:56:24,278 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 676 transitions. [2023-08-29 19:56:24,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 676 transitions. [2023-08-29 19:56:24,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:24,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 676 transitions. [2023-08-29 19:56:24,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.66666666666667) internal successors, (676), 6 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,283 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,283 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 196 flow. Second operand 6 states and 676 transitions. [2023-08-29 19:56:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 387 flow [2023-08-29 19:56:24,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 383 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 19:56:24,286 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 207 flow [2023-08-29 19:56:24,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2023-08-29 19:56:24,286 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-29 19:56:24,287 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 207 flow [2023-08-29 19:56:24,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:24,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:24,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:56:24,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:24,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1396868391, now seen corresponding path program 1 times [2023-08-29 19:56:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:24,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714394105] [2023-08-29 19:56:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:24,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:24,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714394105] [2023-08-29 19:56:24,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714394105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:24,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:24,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:24,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308594782] [2023-08-29 19:56:24,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:24,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:56:24,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:56:24,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:56:24,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 313 [2023-08-29 19:56:24,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:24,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 313 [2023-08-29 19:56:24,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:24,494 INFO L130 PetriNetUnfolder]: 127/305 cut-off events. [2023-08-29 19:56:24,495 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-29 19:56:24,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 305 events. 127/305 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1138 event pairs, 27 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 871. Up to 209 conditions per place. [2023-08-29 19:56:24,497 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 37 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2023-08-29 19:56:24,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 303 flow [2023-08-29 19:56:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-29 19:56:24,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706070287539936 [2023-08-29 19:56:24,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-29 19:56:24,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-29 19:56:24,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:24,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-29 19:56:24,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,503 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 207 flow. Second operand 3 states and 348 transitions. [2023-08-29 19:56:24,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 303 flow [2023-08-29 19:56:24,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 289 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 19:56:24,506 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 201 flow [2023-08-29 19:56:24,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2023-08-29 19:56:24,506 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-29 19:56:24,507 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 201 flow [2023-08-29 19:56:24,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:24,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:24,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:56:24,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:24,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:24,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1396868390, now seen corresponding path program 1 times [2023-08-29 19:56:24,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:24,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520924038] [2023-08-29 19:56:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:24,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:24,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:24,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520924038] [2023-08-29 19:56:24,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520924038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:24,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:24,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:24,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064413020] [2023-08-29 19:56:24,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:24,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:56:24,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:24,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:56:24,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:56:24,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 313 [2023-08-29 19:56:24,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:24,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 313 [2023-08-29 19:56:24,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:24,714 INFO L130 PetriNetUnfolder]: 123/302 cut-off events. [2023-08-29 19:56:24,714 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-29 19:56:24,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 302 events. 123/302 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1140 event pairs, 85 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 870. Up to 262 conditions per place. [2023-08-29 19:56:24,716 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 38 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2023-08-29 19:56:24,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 311 flow [2023-08-29 19:56:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-29 19:56:24,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865814696485623 [2023-08-29 19:56:24,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-29 19:56:24,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-29 19:56:24,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:24,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-29 19:56:24,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,723 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 201 flow. Second operand 3 states and 363 transitions. [2023-08-29 19:56:24,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 311 flow [2023-08-29 19:56:24,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 47 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:56:24,725 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 233 flow [2023-08-29 19:56:24,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=233, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-08-29 19:56:24,726 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -12 predicate places. [2023-08-29 19:56:24,727 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 233 flow [2023-08-29 19:56:24,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:24,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:24,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:56:24,727 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:24,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1396868386, now seen corresponding path program 1 times [2023-08-29 19:56:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:24,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605388990] [2023-08-29 19:56:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:24,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:24,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605388990] [2023-08-29 19:56:24,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605388990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:24,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:24,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:56:24,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32847601] [2023-08-29 19:56:24,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:24,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:56:24,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:24,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:56:24,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:56:24,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 313 [2023-08-29 19:56:24,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:24,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 313 [2023-08-29 19:56:24,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:24,948 INFO L130 PetriNetUnfolder]: 116/284 cut-off events. [2023-08-29 19:56:24,949 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2023-08-29 19:56:24,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 284 events. 116/284 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1031 event pairs, 27 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 885. Up to 185 conditions per place. [2023-08-29 19:56:24,951 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 38 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-08-29 19:56:24,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 328 flow [2023-08-29 19:56:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:56:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:56:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-29 19:56:24,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38338658146964855 [2023-08-29 19:56:24,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-29 19:56:24,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-29 19:56:24,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:24,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-29 19:56:24,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,956 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 233 flow. Second operand 3 states and 360 transitions. [2023-08-29 19:56:24,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 328 flow [2023-08-29 19:56:24,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:56:24,959 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 227 flow [2023-08-29 19:56:24,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-29 19:56:24,960 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-29 19:56:24,960 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 227 flow [2023-08-29 19:56:24,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:24,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:24,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:24,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:56:24,961 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:24,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash -167064850, now seen corresponding path program 1 times [2023-08-29 19:56:24,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:24,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147682105] [2023-08-29 19:56:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:24,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:25,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:25,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147682105] [2023-08-29 19:56:25,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147682105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:25,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:25,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:56:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349500514] [2023-08-29 19:56:25,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:56:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:56:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:56:25,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 313 [2023-08-29 19:56:25,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:25,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:25,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 313 [2023-08-29 19:56:25,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:25,323 INFO L130 PetriNetUnfolder]: 107/258 cut-off events. [2023-08-29 19:56:25,323 INFO L131 PetriNetUnfolder]: For 268/268 co-relation queries the response was YES. [2023-08-29 19:56:25,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 258 events. 107/258 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 862 event pairs, 21 based on Foata normal form. 5/245 useless extension candidates. Maximal degree in co-relation 829. Up to 177 conditions per place. [2023-08-29 19:56:25,325 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 35 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2023-08-29 19:56:25,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 323 flow [2023-08-29 19:56:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:56:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:56:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2023-08-29 19:56:25,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33466453674121405 [2023-08-29 19:56:25,327 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 419 transitions. [2023-08-29 19:56:25,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 419 transitions. [2023-08-29 19:56:25,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:25,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 419 transitions. [2023-08-29 19:56:25,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:25,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:25,331 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:25,331 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 227 flow. Second operand 4 states and 419 transitions. [2023-08-29 19:56:25,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 323 flow [2023-08-29 19:56:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 302 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:56:25,334 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 214 flow [2023-08-29 19:56:25,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-29 19:56:25,334 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 19:56:25,334 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 214 flow [2023-08-29 19:56:25,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:25,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:25,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:25,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:56:25,335 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:25,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -167064848, now seen corresponding path program 1 times [2023-08-29 19:56:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:25,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754465663] [2023-08-29 19:56:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:25,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:25,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:25,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754465663] [2023-08-29 19:56:25,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754465663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:25,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:25,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 19:56:25,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117444642] [2023-08-29 19:56:25,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:25,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 19:56:25,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 19:56:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-08-29 19:56:26,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 313 [2023-08-29 19:56:26,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 214 flow. Second operand has 9 states, 9 states have (on average 89.77777777777777) internal successors, (808), 9 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:26,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 313 [2023-08-29 19:56:26,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:26,339 INFO L130 PetriNetUnfolder]: 109/268 cut-off events. [2023-08-29 19:56:26,339 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2023-08-29 19:56:26,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 268 events. 109/268 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 885 event pairs, 14 based on Foata normal form. 4/253 useless extension candidates. Maximal degree in co-relation 853. Up to 171 conditions per place. [2023-08-29 19:56:26,341 INFO L137 encePairwiseOnDemand]: 304/313 looper letters, 53 selfloop transitions, 14 changer transitions 0/68 dead transitions. [2023-08-29 19:56:26,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 461 flow [2023-08-29 19:56:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:56:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:56:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 852 transitions. [2023-08-29 19:56:26,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30244941427050054 [2023-08-29 19:56:26,345 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 852 transitions. [2023-08-29 19:56:26,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 852 transitions. [2023-08-29 19:56:26,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:26,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 852 transitions. [2023-08-29 19:56:26,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.66666666666667) internal successors, (852), 9 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 313.0) internal successors, (3130), 10 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,351 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 313.0) internal successors, (3130), 10 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,351 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 214 flow. Second operand 9 states and 852 transitions. [2023-08-29 19:56:26,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 461 flow [2023-08-29 19:56:26,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 439 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:56:26,354 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 299 flow [2023-08-29 19:56:26,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=299, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-29 19:56:26,354 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-29 19:56:26,355 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 299 flow [2023-08-29 19:56:26,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 89.77777777777777) internal successors, (808), 9 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:26,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:26,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:56:26,355 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:26,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:26,356 INFO L85 PathProgramCache]: Analyzing trace with hash -252358597, now seen corresponding path program 1 times [2023-08-29 19:56:26,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:26,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402056653] [2023-08-29 19:56:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:26,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:26,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:26,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402056653] [2023-08-29 19:56:26,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402056653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:26,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:26,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:56:26,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413828054] [2023-08-29 19:56:26,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:26,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:56:26,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:26,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:56:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:56:26,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 313 [2023-08-29 19:56:26,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 299 flow. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:26,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 313 [2023-08-29 19:56:26,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:26,606 INFO L130 PetriNetUnfolder]: 86/227 cut-off events. [2023-08-29 19:56:26,606 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2023-08-29 19:56:26,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 227 events. 86/227 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 725 event pairs, 15 based on Foata normal form. 19/230 useless extension candidates. Maximal degree in co-relation 782. Up to 158 conditions per place. [2023-08-29 19:56:26,608 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 40 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-08-29 19:56:26,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 413 flow [2023-08-29 19:56:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:56:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:56:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-08-29 19:56:26,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3426517571884984 [2023-08-29 19:56:26,610 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-08-29 19:56:26,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-08-29 19:56:26,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:26,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-08-29 19:56:26,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,614 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,614 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 299 flow. Second operand 4 states and 429 transitions. [2023-08-29 19:56:26,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 413 flow [2023-08-29 19:56:26,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 392 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-29 19:56:26,617 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 294 flow [2023-08-29 19:56:26,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-08-29 19:56:26,618 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -10 predicate places. [2023-08-29 19:56:26,618 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 294 flow [2023-08-29 19:56:26,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:26,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:26,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:26,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:56:26,618 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:26,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:26,619 INFO L85 PathProgramCache]: Analyzing trace with hash 766796576, now seen corresponding path program 1 times [2023-08-29 19:56:26,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:26,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273361943] [2023-08-29 19:56:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:27,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:27,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273361943] [2023-08-29 19:56:27,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273361943] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:56:27,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689186806] [2023-08-29 19:56:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:27,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:56:27,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:56:27,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:56:27,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 19:56:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:27,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 19:56:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:56:27,481 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:56:27,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:56:27,556 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:56:27,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:56:28,023 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:56:28,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 191 [2023-08-29 19:56:28,060 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2023-08-29 19:56:28,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 201 [2023-08-29 19:56:28,085 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:56:28,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 156 [2023-08-29 19:56:28,102 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:56:28,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 148 [2023-08-29 19:56:28,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:56:28,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-08-29 19:56:28,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 19:56:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:28,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:56:28,602 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:56:28,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 192 [2023-08-29 19:56:28,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:56:28,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 193 [2023-08-29 19:56:28,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:56:28,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-29 19:56:28,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2023-08-29 19:56:28,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-08-29 19:56:28,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-08-29 19:56:29,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:56:29,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2023-08-29 19:56:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:29,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689186806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:56:29,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:56:29,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-29 19:56:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582040862] [2023-08-29 19:56:29,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:56:29,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-29 19:56:29,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-29 19:56:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=573, Unknown=1, NotChecked=0, Total=650 [2023-08-29 19:56:30,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 313 [2023-08-29 19:56:30,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 294 flow. Second operand has 26 states, 26 states have (on average 52.07692307692308) internal successors, (1354), 26 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:30,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:30,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 313 [2023-08-29 19:56:30,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:45,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:56:58,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:27,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:37,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:41,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:43,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:45,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:47,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:53,016 INFO L130 PetriNetUnfolder]: 274/781 cut-off events. [2023-08-29 19:57:53,017 INFO L131 PetriNetUnfolder]: For 1009/1009 co-relation queries the response was YES. [2023-08-29 19:57:53,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2643 conditions, 781 events. 274/781 cut-off events. For 1009/1009 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3986 event pairs, 24 based on Foata normal form. 27/737 useless extension candidates. Maximal degree in co-relation 2618. Up to 136 conditions per place. [2023-08-29 19:57:53,022 INFO L137 encePairwiseOnDemand]: 294/313 looper letters, 156 selfloop transitions, 102 changer transitions 0/259 dead transitions. [2023-08-29 19:57:53,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 259 transitions, 1836 flow [2023-08-29 19:57:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-29 19:57:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-29 19:57:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2541 transitions. [2023-08-29 19:57:53,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.17648284483956106 [2023-08-29 19:57:53,033 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2541 transitions. [2023-08-29 19:57:53,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2541 transitions. [2023-08-29 19:57:53,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:53,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2541 transitions. [2023-08-29 19:57:53,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.23913043478261) internal successors, (2541), 46 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:53,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 313.0) internal successors, (14711), 47 states have internal predecessors, (14711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:53,057 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 313.0) internal successors, (14711), 47 states have internal predecessors, (14711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:53,058 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 294 flow. Second operand 46 states and 2541 transitions. [2023-08-29 19:57:53,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 259 transitions, 1836 flow [2023-08-29 19:57:53,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 259 transitions, 1764 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:57:53,065 INFO L231 Difference]: Finished difference. Result has 124 places, 142 transitions, 1223 flow [2023-08-29 19:57:53,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1223, PETRI_PLACES=124, PETRI_TRANSITIONS=142} [2023-08-29 19:57:53,066 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 57 predicate places. [2023-08-29 19:57:53,066 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 142 transitions, 1223 flow [2023-08-29 19:57:53,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.07692307692308) internal successors, (1354), 26 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:53,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:53,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:53,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 19:57:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 19:57:53,280 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:53,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:53,280 INFO L85 PathProgramCache]: Analyzing trace with hash 839167845, now seen corresponding path program 1 times [2023-08-29 19:57:53,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:53,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140827619] [2023-08-29 19:57:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:53,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:57:53,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140827619] [2023-08-29 19:57:53,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140827619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:57:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304259352] [2023-08-29 19:57:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:53,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:53,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:57:53,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:57:53,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 19:57:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:53,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-29 19:57:53,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:57:53,749 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 19:57:53,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 19:57:53,796 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:57:53,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:57:53,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 19:57:53,943 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:57:53,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 19:57:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:53,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:57:54,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-29 19:57:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:54,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304259352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:57:54,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:57:54,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-29 19:57:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035570232] [2023-08-29 19:57:54,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:57:54,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:57:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:57:54,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:57:54,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 313 [2023-08-29 19:57:54,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 142 transitions, 1223 flow. Second operand has 16 states, 16 states have (on average 89.0625) internal successors, (1425), 16 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:54,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:54,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 313 [2023-08-29 19:57:54,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:54,973 INFO L130 PetriNetUnfolder]: 262/734 cut-off events. [2023-08-29 19:57:54,973 INFO L131 PetriNetUnfolder]: For 4434/4434 co-relation queries the response was YES. [2023-08-29 19:57:54,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3796 conditions, 734 events. 262/734 cut-off events. For 4434/4434 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3612 event pairs, 41 based on Foata normal form. 28/718 useless extension candidates. Maximal degree in co-relation 3746. Up to 459 conditions per place. [2023-08-29 19:57:54,981 INFO L137 encePairwiseOnDemand]: 306/313 looper letters, 123 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2023-08-29 19:57:54,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 159 transitions, 1696 flow [2023-08-29 19:57:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:57:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:57:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 824 transitions. [2023-08-29 19:57:54,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29250976215832447 [2023-08-29 19:57:54,985 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 824 transitions. [2023-08-29 19:57:54,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 824 transitions. [2023-08-29 19:57:54,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:54,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 824 transitions. [2023-08-29 19:57:54,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.55555555555556) internal successors, (824), 9 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:54,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 313.0) internal successors, (3130), 10 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:54,991 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 313.0) internal successors, (3130), 10 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:54,991 INFO L175 Difference]: Start difference. First operand has 124 places, 142 transitions, 1223 flow. Second operand 9 states and 824 transitions. [2023-08-29 19:57:54,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 159 transitions, 1696 flow [2023-08-29 19:57:55,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 159 transitions, 1593 flow, removed 42 selfloop flow, removed 5 redundant places. [2023-08-29 19:57:55,012 INFO L231 Difference]: Finished difference. Result has 126 places, 142 transitions, 1202 flow [2023-08-29 19:57:55,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1202, PETRI_PLACES=126, PETRI_TRANSITIONS=142} [2023-08-29 19:57:55,013 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 59 predicate places. [2023-08-29 19:57:55,013 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 142 transitions, 1202 flow [2023-08-29 19:57:55,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 89.0625) internal successors, (1425), 16 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:55,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:55,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 19:57:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:55,221 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:55,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1013519066, now seen corresponding path program 1 times [2023-08-29 19:57:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:55,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772868360] [2023-08-29 19:57:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:55,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:55,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:55,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772868360] [2023-08-29 19:57:55,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772868360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:57:55,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170085333] [2023-08-29 19:57:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:55,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:55,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:57:55,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:57:55,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 19:57:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:57:55,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:57:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:55,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:57:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:55,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170085333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:57:55,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:57:55,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 19:57:55,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740152029] [2023-08-29 19:57:55,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:57:55,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:57:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:57:55,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:57:55,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 313 [2023-08-29 19:57:55,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 142 transitions, 1202 flow. Second operand has 7 states, 7 states have (on average 118.28571428571429) internal successors, (828), 7 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:55,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 313 [2023-08-29 19:57:55,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:55,703 INFO L130 PetriNetUnfolder]: 189/576 cut-off events. [2023-08-29 19:57:55,703 INFO L131 PetriNetUnfolder]: For 3497/3497 co-relation queries the response was YES. [2023-08-29 19:57:55,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2973 conditions, 576 events. 189/576 cut-off events. For 3497/3497 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2383 event pairs, 30 based on Foata normal form. 17/554 useless extension candidates. Maximal degree in co-relation 2924. Up to 132 conditions per place. [2023-08-29 19:57:55,709 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 148 selfloop transitions, 12 changer transitions 5/166 dead transitions. [2023-08-29 19:57:55,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 166 transitions, 1803 flow [2023-08-29 19:57:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:57:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:57:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 748 transitions. [2023-08-29 19:57:55,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39829605963791265 [2023-08-29 19:57:55,711 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 748 transitions. [2023-08-29 19:57:55,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 748 transitions. [2023-08-29 19:57:55,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:55,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 748 transitions. [2023-08-29 19:57:55,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,716 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,716 INFO L175 Difference]: Start difference. First operand has 126 places, 142 transitions, 1202 flow. Second operand 6 states and 748 transitions. [2023-08-29 19:57:55,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 166 transitions, 1803 flow [2023-08-29 19:57:55,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 166 transitions, 1677 flow, removed 42 selfloop flow, removed 14 redundant places. [2023-08-29 19:57:55,730 INFO L231 Difference]: Finished difference. Result has 109 places, 108 transitions, 916 flow [2023-08-29 19:57:55,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=916, PETRI_PLACES=109, PETRI_TRANSITIONS=108} [2023-08-29 19:57:55,730 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 42 predicate places. [2023-08-29 19:57:55,730 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 108 transitions, 916 flow [2023-08-29 19:57:55,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.28571428571429) internal successors, (828), 7 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:55,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:55,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:57:55,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:55,938 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:55,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:55,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1013368158, now seen corresponding path program 1 times [2023-08-29 19:57:55,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:55,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455721108] [2023-08-29 19:57:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:55,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:56,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:56,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455721108] [2023-08-29 19:57:56,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455721108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:57:56,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610562945] [2023-08-29 19:57:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:56,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:56,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:57:56,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:57:56,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 19:57:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 19:57:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:57:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:56,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:57:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:56,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610562945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:57:56,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:57:56,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-29 19:57:56,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795038008] [2023-08-29 19:57:56,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:57:56,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:57:56,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:57:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:57:56,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:57:56,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 108 transitions, 916 flow. Second operand has 11 states, 11 states have (on average 105.0) internal successors, (1155), 11 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:56,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:56,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:57:56,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:57,003 INFO L130 PetriNetUnfolder]: 243/701 cut-off events. [2023-08-29 19:57:57,003 INFO L131 PetriNetUnfolder]: For 3974/3974 co-relation queries the response was YES. [2023-08-29 19:57:57,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 701 events. 243/701 cut-off events. For 3974/3974 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2896 event pairs, 25 based on Foata normal form. 27/684 useless extension candidates. Maximal degree in co-relation 3503. Up to 140 conditions per place. [2023-08-29 19:57:57,010 INFO L137 encePairwiseOnDemand]: 303/313 looper letters, 167 selfloop transitions, 49 changer transitions 3/220 dead transitions. [2023-08-29 19:57:57,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 220 transitions, 2318 flow [2023-08-29 19:57:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 19:57:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 19:57:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2262 transitions. [2023-08-29 19:57:57,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34413509812870835 [2023-08-29 19:57:57,014 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2262 transitions. [2023-08-29 19:57:57,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2262 transitions. [2023-08-29 19:57:57,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:57,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2262 transitions. [2023-08-29 19:57:57,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 107.71428571428571) internal successors, (2262), 21 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:57,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 313.0) internal successors, (6886), 22 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:57,031 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 313.0) internal successors, (6886), 22 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:57,032 INFO L175 Difference]: Start difference. First operand has 109 places, 108 transitions, 916 flow. Second operand 21 states and 2262 transitions. [2023-08-29 19:57:57,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 220 transitions, 2318 flow [2023-08-29 19:57:57,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 220 transitions, 2307 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 19:57:57,049 INFO L231 Difference]: Finished difference. Result has 133 places, 127 transitions, 1214 flow [2023-08-29 19:57:57,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1214, PETRI_PLACES=133, PETRI_TRANSITIONS=127} [2023-08-29 19:57:57,050 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 66 predicate places. [2023-08-29 19:57:57,050 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 127 transitions, 1214 flow [2023-08-29 19:57:57,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.0) internal successors, (1155), 11 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:57,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:57,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:57,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 19:57:57,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:57,260 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:57,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1550877151, now seen corresponding path program 1 times [2023-08-29 19:57:57,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:57,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347604000] [2023-08-29 19:57:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:57,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 19:57:57,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:57,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347604000] [2023-08-29 19:57:57,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347604000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:57:57,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365151734] [2023-08-29 19:57:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:57,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:57:57,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:57:57,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 19:57:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-29 19:57:57,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:57:58,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-29 19:57:58,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-08-29 19:57:58,081 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:57:58,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:57:58,425 INFO L321 Elim1Store]: treesize reduction 58, result has 15.9 percent of original size [2023-08-29 19:57:58,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 178 treesize of output 196 [2023-08-29 19:57:58,442 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:57:58,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 159 [2023-08-29 19:57:58,455 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:57:58,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 151 [2023-08-29 19:57:58,472 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2023-08-29 19:57:58,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 175 treesize of output 185 [2023-08-29 19:57:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:58,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:57:58,780 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:57:58,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 192 [2023-08-29 19:57:58,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:57:58,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 193 [2023-08-29 19:57:59,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:57:59,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-08-29 19:57:59,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-29 19:57:59,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-29 19:57:59,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-29 19:57:59,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-08-29 19:57:59,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:57:59,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 55 [2023-08-29 19:57:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:59,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365151734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:57:59,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:57:59,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 23 [2023-08-29 19:57:59,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041136428] [2023-08-29 19:57:59,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:57:59,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 19:57:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 19:57:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-08-29 19:58:00,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 313 [2023-08-29 19:58:00,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 127 transitions, 1214 flow. Second operand has 25 states, 25 states have (on average 69.16) internal successors, (1729), 25 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:00,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:00,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 313 [2023-08-29 19:58:00,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:30,263 INFO L130 PetriNetUnfolder]: 501/1518 cut-off events. [2023-08-29 19:58:30,263 INFO L131 PetriNetUnfolder]: For 10843/10843 co-relation queries the response was YES. [2023-08-29 19:58:30,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8236 conditions, 1518 events. 501/1518 cut-off events. For 10843/10843 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 7871 event pairs, 8 based on Foata normal form. 45/1484 useless extension candidates. Maximal degree in co-relation 8185. Up to 292 conditions per place. [2023-08-29 19:58:30,278 INFO L137 encePairwiseOnDemand]: 295/313 looper letters, 230 selfloop transitions, 296 changer transitions 4/531 dead transitions. [2023-08-29 19:58:30,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 531 transitions, 6039 flow [2023-08-29 19:58:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-29 19:58:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-29 19:58:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 6568 transitions. [2023-08-29 19:58:30,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22563468343124118 [2023-08-29 19:58:30,288 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 6568 transitions. [2023-08-29 19:58:30,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 6568 transitions. [2023-08-29 19:58:30,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:30,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 6568 transitions. [2023-08-29 19:58:30,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 70.6236559139785) internal successors, (6568), 93 states have internal predecessors, (6568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:30,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 313.0) internal successors, (29422), 94 states have internal predecessors, (29422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:30,329 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 313.0) internal successors, (29422), 94 states have internal predecessors, (29422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:30,329 INFO L175 Difference]: Start difference. First operand has 133 places, 127 transitions, 1214 flow. Second operand 93 states and 6568 transitions. [2023-08-29 19:58:30,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 531 transitions, 6039 flow [2023-08-29 19:58:30,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 531 transitions, 5830 flow, removed 65 selfloop flow, removed 9 redundant places. [2023-08-29 19:58:30,397 INFO L231 Difference]: Finished difference. Result has 245 places, 382 transitions, 4766 flow [2023-08-29 19:58:30,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=4766, PETRI_PLACES=245, PETRI_TRANSITIONS=382} [2023-08-29 19:58:30,397 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 178 predicate places. [2023-08-29 19:58:30,397 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 382 transitions, 4766 flow [2023-08-29 19:58:30,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 69.16) internal successors, (1729), 25 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:30,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:30,398 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:30,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 19:58:30,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-29 19:58:30,599 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:30,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1850938641, now seen corresponding path program 1 times [2023-08-29 19:58:30,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:30,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750151373] [2023-08-29 19:58:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:30,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:30,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:30,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750151373] [2023-08-29 19:58:30,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750151373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:30,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298446959] [2023-08-29 19:58:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:30,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:30,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:30,785 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:58:30,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 19:58:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:30,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:58:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:31,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:31,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298446959] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:31,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:31,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 19:58:31,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628739821] [2023-08-29 19:58:31,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:31,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:58:31,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:31,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:58:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:58:31,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:58:31,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 382 transitions, 4766 flow. Second operand has 13 states, 13 states have (on average 106.15384615384616) internal successors, (1380), 13 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:31,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:31,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:58:31,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:32,720 INFO L130 PetriNetUnfolder]: 1037/3018 cut-off events. [2023-08-29 19:58:32,720 INFO L131 PetriNetUnfolder]: For 41852/41852 co-relation queries the response was YES. [2023-08-29 19:58:32,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19993 conditions, 3018 events. 1037/3018 cut-off events. For 41852/41852 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 19767 event pairs, 65 based on Foata normal form. 134/3150 useless extension candidates. Maximal degree in co-relation 19915. Up to 618 conditions per place. [2023-08-29 19:58:32,759 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 833 selfloop transitions, 97 changer transitions 3/934 dead transitions. [2023-08-29 19:58:32,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 934 transitions, 14055 flow [2023-08-29 19:58:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 19:58:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 19:58:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2305 transitions. [2023-08-29 19:58:32,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35067701201886503 [2023-08-29 19:58:32,763 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2305 transitions. [2023-08-29 19:58:32,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2305 transitions. [2023-08-29 19:58:32,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:32,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2305 transitions. [2023-08-29 19:58:32,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 109.76190476190476) internal successors, (2305), 21 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:32,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 313.0) internal successors, (6886), 22 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:32,774 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 313.0) internal successors, (6886), 22 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:32,774 INFO L175 Difference]: Start difference. First operand has 245 places, 382 transitions, 4766 flow. Second operand 21 states and 2305 transitions. [2023-08-29 19:58:32,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 934 transitions, 14055 flow [2023-08-29 19:58:32,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 934 transitions, 10870 flow, removed 1505 selfloop flow, removed 14 redundant places. [2023-08-29 19:58:32,980 INFO L231 Difference]: Finished difference. Result has 258 places, 417 transitions, 4299 flow [2023-08-29 19:58:32,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4299, PETRI_PLACES=258, PETRI_TRANSITIONS=417} [2023-08-29 19:58:32,980 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 191 predicate places. [2023-08-29 19:58:32,981 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 417 transitions, 4299 flow [2023-08-29 19:58:32,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.15384615384616) internal successors, (1380), 13 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:32,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:32,982 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:32,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 19:58:33,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:33,189 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:33,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:33,189 INFO L85 PathProgramCache]: Analyzing trace with hash -113547920, now seen corresponding path program 2 times [2023-08-29 19:58:33,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:33,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273334143] [2023-08-29 19:58:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:33,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-29 19:58:33,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:33,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273334143] [2023-08-29 19:58:33,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273334143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:33,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438340013] [2023-08-29 19:58:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:58:33,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:33,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:58:33,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 19:58:33,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:58:33,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:34,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 19:58:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:34,014 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:58:34,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:58:34,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:58:34,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2023-08-29 19:58:34,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-08-29 19:58:34,397 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:58:34,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 19:58:34,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:58:34,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-29 19:58:34,521 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-29 19:58:34,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 19:58:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:34,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:34,860 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-08-29 19:58:34,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 200 [2023-08-29 19:58:34,882 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:58:34,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 184 [2023-08-29 19:58:34,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:58:34,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-29 19:58:34,992 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:58:34,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-29 19:58:34,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-08-29 19:58:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:35,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438340013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:35,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:35,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 23 [2023-08-29 19:58:35,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563372057] [2023-08-29 19:58:35,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:35,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 19:58:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 19:58:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2023-08-29 19:58:36,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 313 [2023-08-29 19:58:36,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 417 transitions, 4299 flow. Second operand has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:36,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:36,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 313 [2023-08-29 19:58:36,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:40,791 INFO L130 PetriNetUnfolder]: 998/3034 cut-off events. [2023-08-29 19:58:40,792 INFO L131 PetriNetUnfolder]: For 25219/25219 co-relation queries the response was YES. [2023-08-29 19:58:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16613 conditions, 3034 events. 998/3034 cut-off events. For 25219/25219 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 19731 event pairs, 59 based on Foata normal form. 71/3103 useless extension candidates. Maximal degree in co-relation 16533. Up to 619 conditions per place. [2023-08-29 19:58:40,831 INFO L137 encePairwiseOnDemand]: 299/313 looper letters, 289 selfloop transitions, 329 changer transitions 2/621 dead transitions. [2023-08-29 19:58:40,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 621 transitions, 7178 flow [2023-08-29 19:58:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-29 19:58:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-29 19:58:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4770 transitions. [2023-08-29 19:58:40,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2539936102236422 [2023-08-29 19:58:40,838 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4770 transitions. [2023-08-29 19:58:40,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4770 transitions. [2023-08-29 19:58:40,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:40,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4770 transitions. [2023-08-29 19:58:40,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 79.5) internal successors, (4770), 60 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:40,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 313.0) internal successors, (19093), 61 states have internal predecessors, (19093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:40,858 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 313.0) internal successors, (19093), 61 states have internal predecessors, (19093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:40,858 INFO L175 Difference]: Start difference. First operand has 258 places, 417 transitions, 4299 flow. Second operand 60 states and 4770 transitions. [2023-08-29 19:58:40,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 621 transitions, 7178 flow [2023-08-29 19:58:40,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 621 transitions, 6946 flow, removed 44 selfloop flow, removed 22 redundant places. [2023-08-29 19:58:40,969 INFO L231 Difference]: Finished difference. Result has 297 places, 477 transitions, 5226 flow [2023-08-29 19:58:40,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=5226, PETRI_PLACES=297, PETRI_TRANSITIONS=477} [2023-08-29 19:58:40,970 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 230 predicate places. [2023-08-29 19:58:40,970 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 477 transitions, 5226 flow [2023-08-29 19:58:40,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:40,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:40,971 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:40,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 19:58:41,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:41,178 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:41,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1851689517, now seen corresponding path program 2 times [2023-08-29 19:58:41,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:41,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897046890] [2023-08-29 19:58:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:41,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:41,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:41,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897046890] [2023-08-29 19:58:41,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897046890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:41,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068939549] [2023-08-29 19:58:41,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:58:41,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:41,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:41,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:58:41,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 19:58:41,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:58:41,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:58:41,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 72 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:41,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:42,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068939549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:42,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:42,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-29 19:58:42,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823821275] [2023-08-29 19:58:42,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:42,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 19:58:42,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:42,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 19:58:42,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-08-29 19:58:42,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:58:42,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 477 transitions, 5226 flow. Second operand has 23 states, 23 states have (on average 107.65217391304348) internal successors, (2476), 23 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:42,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:42,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:58:42,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:43,524 INFO L130 PetriNetUnfolder]: 716/2221 cut-off events. [2023-08-29 19:58:43,525 INFO L131 PetriNetUnfolder]: For 16599/16599 co-relation queries the response was YES. [2023-08-29 19:58:43,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12948 conditions, 2221 events. 716/2221 cut-off events. For 16599/16599 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 12893 event pairs, 46 based on Foata normal form. 53/2272 useless extension candidates. Maximal degree in co-relation 12874. Up to 700 conditions per place. [2023-08-29 19:58:43,553 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 414 selfloop transitions, 119 changer transitions 4/538 dead transitions. [2023-08-29 19:58:43,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 538 transitions, 6778 flow [2023-08-29 19:58:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 19:58:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 19:58:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2562 transitions. [2023-08-29 19:58:43,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34105431309904155 [2023-08-29 19:58:43,557 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2562 transitions. [2023-08-29 19:58:43,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2562 transitions. [2023-08-29 19:58:43,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:43,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2562 transitions. [2023-08-29 19:58:43,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 106.75) internal successors, (2562), 24 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:43,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:43,566 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:43,566 INFO L175 Difference]: Start difference. First operand has 297 places, 477 transitions, 5226 flow. Second operand 24 states and 2562 transitions. [2023-08-29 19:58:43,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 538 transitions, 6778 flow [2023-08-29 19:58:43,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 538 transitions, 6131 flow, removed 51 selfloop flow, removed 30 redundant places. [2023-08-29 19:58:43,654 INFO L231 Difference]: Finished difference. Result has 286 places, 448 transitions, 4439 flow [2023-08-29 19:58:43,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=4177, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4439, PETRI_PLACES=286, PETRI_TRANSITIONS=448} [2023-08-29 19:58:43,655 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 219 predicate places. [2023-08-29 19:58:43,655 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 448 transitions, 4439 flow [2023-08-29 19:58:43,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 107.65217391304348) internal successors, (2476), 23 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:43,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:43,656 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:43,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 19:58:43,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-29 19:58:43,862 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:43,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1835615229, now seen corresponding path program 2 times [2023-08-29 19:58:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:43,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271133438] [2023-08-29 19:58:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:43,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:44,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:44,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271133438] [2023-08-29 19:58:44,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271133438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:44,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657196556] [2023-08-29 19:58:44,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:58:44,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:44,335 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:58:44,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 19:58:44,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:58:44,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:44,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 19:58:44,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:44,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:45,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657196556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:45,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:45,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-29 19:58:45,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601105220] [2023-08-29 19:58:45,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:45,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:58:45,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:58:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:58:45,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:58:45,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 448 transitions, 4439 flow. Second operand has 21 states, 21 states have (on average 108.0) internal successors, (2268), 21 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:45,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:45,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:58:45,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:50,021 INFO L130 PetriNetUnfolder]: 2530/7609 cut-off events. [2023-08-29 19:58:50,022 INFO L131 PetriNetUnfolder]: For 47293/47293 co-relation queries the response was YES. [2023-08-29 19:58:50,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42658 conditions, 7609 events. 2530/7609 cut-off events. For 47293/47293 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 52608 event pairs, 174 based on Foata normal form. 168/7775 useless extension candidates. Maximal degree in co-relation 42596. Up to 1581 conditions per place. [2023-08-29 19:58:50,088 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 2101 selfloop transitions, 193 changer transitions 6/2301 dead transitions. [2023-08-29 19:58:50,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 2301 transitions, 27184 flow [2023-08-29 19:58:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 19:58:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 19:58:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4088 transitions. [2023-08-29 19:58:50,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35299196960538815 [2023-08-29 19:58:50,093 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4088 transitions. [2023-08-29 19:58:50,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4088 transitions. [2023-08-29 19:58:50,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:50,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4088 transitions. [2023-08-29 19:58:50,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 110.48648648648648) internal successors, (4088), 37 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:50,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 313.0) internal successors, (11894), 38 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:50,107 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 313.0) internal successors, (11894), 38 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:50,107 INFO L175 Difference]: Start difference. First operand has 286 places, 448 transitions, 4439 flow. Second operand 37 states and 4088 transitions. [2023-08-29 19:58:50,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 2301 transitions, 27184 flow [2023-08-29 19:58:50,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 2301 transitions, 26232 flow, removed 75 selfloop flow, removed 21 redundant places. [2023-08-29 19:58:50,400 INFO L231 Difference]: Finished difference. Result has 315 places, 573 transitions, 6498 flow [2023-08-29 19:58:50,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6498, PETRI_PLACES=315, PETRI_TRANSITIONS=573} [2023-08-29 19:58:50,401 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 248 predicate places. [2023-08-29 19:58:50,401 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 573 transitions, 6498 flow [2023-08-29 19:58:50,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 108.0) internal successors, (2268), 21 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:50,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:50,401 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:50,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-29 19:58:50,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-29 19:58:50,604 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:50,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1438216747, now seen corresponding path program 3 times [2023-08-29 19:58:50,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:50,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245005310] [2023-08-29 19:58:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:50,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:51,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:51,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245005310] [2023-08-29 19:58:51,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245005310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:51,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364695648] [2023-08-29 19:58:51,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:58:51,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:51,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:51,893 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:58:51,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 19:59:07,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-08-29 19:59:07,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:59:07,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-29 19:59:07,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:59:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:59:07,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:59:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:59:08,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364695648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:59:08,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:59:08,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 35 [2023-08-29 19:59:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975412271] [2023-08-29 19:59:08,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:59:08,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-29 19:59:08,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:08,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-29 19:59:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2023-08-29 19:59:08,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:59:08,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 573 transitions, 6498 flow. Second operand has 37 states, 37 states have (on average 109.29729729729729) internal successors, (4044), 37 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:59:08,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:08,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:59:08,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:49,221 INFO L130 PetriNetUnfolder]: 5162/15457 cut-off events. [2023-08-29 19:59:49,221 INFO L131 PetriNetUnfolder]: For 109204/109204 co-relation queries the response was YES. [2023-08-29 19:59:49,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87857 conditions, 15457 events. 5162/15457 cut-off events. For 109204/109204 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 108071 event pairs, 350 based on Foata normal form. 384/15839 useless extension candidates. Maximal degree in co-relation 87783. Up to 3261 conditions per place. [2023-08-29 19:59:49,362 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 4221 selfloop transitions, 369 changer transitions 14/4605 dead transitions. [2023-08-29 19:59:49,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 4605 transitions, 54929 flow [2023-08-29 19:59:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-29 19:59:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-29 19:59:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 7670 transitions. [2023-08-29 19:59:49,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3551419178589619 [2023-08-29 19:59:49,376 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 7670 transitions. [2023-08-29 19:59:49,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 7670 transitions. [2023-08-29 19:59:49,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:49,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 7670 transitions. [2023-08-29 19:59:49,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 111.15942028985508) internal successors, (7670), 69 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:59:49,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 313.0) internal successors, (21910), 70 states have internal predecessors, (21910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:59:49,410 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 313.0) internal successors, (21910), 70 states have internal predecessors, (21910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:59:49,410 INFO L175 Difference]: Start difference. First operand has 315 places, 573 transitions, 6498 flow. Second operand 69 states and 7670 transitions. [2023-08-29 19:59:49,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 4605 transitions, 54929 flow [2023-08-29 19:59:50,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 4605 transitions, 53840 flow, removed 32 selfloop flow, removed 17 redundant places. [2023-08-29 19:59:50,236 INFO L231 Difference]: Finished difference. Result has 394 places, 754 transitions, 10084 flow [2023-08-29 19:59:50,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=4557, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=10084, PETRI_PLACES=394, PETRI_TRANSITIONS=754} [2023-08-29 19:59:50,237 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 327 predicate places. [2023-08-29 19:59:50,238 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 754 transitions, 10084 flow [2023-08-29 19:59:50,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 109.29729729729729) internal successors, (4044), 37 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:59:50,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:50,239 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:59:50,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 19:59:50,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-29 19:59:50,445 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:59:50,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1645531525, now seen corresponding path program 4 times [2023-08-29 19:59:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:50,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387413426] [2023-08-29 19:59:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:50,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 4530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:59:53,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:53,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387413426] [2023-08-29 19:59:53,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387413426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:59:53,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393150830] [2023-08-29 19:59:53,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 19:59:53,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:59:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:59:53,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:59:53,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 20:00:54,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 20:00:54,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 20:00:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 4144 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-29 20:00:54,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:00:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 4530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:00:55,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 20:00:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 4530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:00:57,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393150830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 20:00:57,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 20:00:57,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 67 [2023-08-29 20:00:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475628428] [2023-08-29 20:00:57,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 20:00:57,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-29 20:00:57,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:00:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-29 20:00:57,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1100, Invalid=3592, Unknown=0, NotChecked=0, Total=4692 [2023-08-29 20:00:58,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 20:00:58,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 754 transitions, 10084 flow. Second operand has 69 states, 69 states have (on average 110.08695652173913) internal successors, (7596), 69 states have internal predecessors, (7596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:00:58,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:00:58,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 20:00:58,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15