./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.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/goblint-regression/28-race_reach_20-callback_racefree.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 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --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 21:41:21,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:41:21,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:41:21,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:41:21,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:41:21,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:41:21,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:41:21,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:41:21,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:41:21,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:41:21,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:41:21,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:41:21,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:41:21,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:41:21,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:41:21,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:41:21,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:41:21,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:41:21,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:41:21,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:41:21,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:41:21,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:41:21,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:41:21,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:41:21,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:41:21,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:41:21,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:41:21,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:41:21,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:41:21,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:41:21,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:41:21,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:41:21,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:41:21,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:41:21,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:41:21,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:41:21,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:41:21,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:41:21,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:41:21,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:41:21,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:41:21,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:41:21,906 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:41:21,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:41:21,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:41:21,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:41:21,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:41:21,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:41:21,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:41:21,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:41:21,910 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:41:21,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:41:21,911 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:41:21,911 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:41:21,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:41:21,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:41:21,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:41:21,912 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:41:21,912 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:41:21,912 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:41:21,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:41:21,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:41:21,913 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:41:21,913 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:41:21,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:41:21,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:41:21,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:41:21,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:41:21,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:41:21,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:41:21,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:41:21,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:41:21,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:41:21,915 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:41:21,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:41:21,915 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:41:21,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:41:22,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:41:22,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:41:22,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:41:22,266 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:41:22,266 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:41:22,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-29 21:41:23,535 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:41:23,778 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:41:23,778 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-29 21:41:23,790 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06ea83687/e838174fc74c4a9da89ce37580a900e0/FLAGbdbf6d8e0 [2023-08-29 21:41:23,809 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06ea83687/e838174fc74c4a9da89ce37580a900e0 [2023-08-29 21:41:23,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:41:23,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:41:23,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:41:23,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:41:23,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:41:23,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:41:23" (1/1) ... [2023-08-29 21:41:23,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64707227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:23, skipping insertion in model container [2023-08-29 21:41:23,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:41:23" (1/1) ... [2023-08-29 21:41:23,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:41:23,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:41:24,169 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2023-08-29 21:41:24,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:41:24,222 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:41:24,250 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2023-08-29 21:41:24,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:41:24,306 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 21:41:24,313 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:41:24,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24 WrapperNode [2023-08-29 21:41:24,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:41:24,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:24,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:41:24,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:41:24,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,357 INFO L138 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 135 [2023-08-29 21:41:24,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:24,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:41:24,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:41:24,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:41:24,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,406 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:41:24,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:41:24,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:41:24,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:41:24,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (1/1) ... [2023-08-29 21:41:24,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:41:24,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:24,457 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 21:41:24,488 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 21:41:24,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:41:24,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:41:24,505 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:41:24,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:41:24,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:41:24,506 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:41:24,506 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:41:24,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:41:24,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:41:24,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:41:24,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:41:24,508 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 21:41:24,713 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:41:24,719 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:41:25,011 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:41:25,018 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:41:25,018 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-29 21:41:25,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:25 BoogieIcfgContainer [2023-08-29 21:41:25,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:41:25,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:41:25,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:41:25,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:41:25,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:41:23" (1/3) ... [2023-08-29 21:41:25,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e976c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:25, skipping insertion in model container [2023-08-29 21:41:25,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:24" (2/3) ... [2023-08-29 21:41:25,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e976c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:25, skipping insertion in model container [2023-08-29 21:41:25,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:25" (3/3) ... [2023-08-29 21:41:25,027 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-08-29 21:41:25,043 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:41:25,043 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:41:25,043 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:41:25,102 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:41:25,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 145 transitions, 298 flow [2023-08-29 21:41:25,191 INFO L130 PetriNetUnfolder]: 26/222 cut-off events. [2023-08-29 21:41:25,191 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:25,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 222 events. 26/222 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 625 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-29 21:41:25,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 145 transitions, 298 flow [2023-08-29 21:41:25,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 145 transitions, 298 flow [2023-08-29 21:41:25,205 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:25,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 145 transitions, 298 flow [2023-08-29 21:41:25,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 145 transitions, 298 flow [2023-08-29 21:41:25,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 145 transitions, 298 flow [2023-08-29 21:41:25,287 INFO L130 PetriNetUnfolder]: 26/222 cut-off events. [2023-08-29 21:41:25,287 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:25,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 222 events. 26/222 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 625 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-29 21:41:25,296 INFO L119 LiptonReduction]: Number of co-enabled transitions 3320 [2023-08-29 21:41:28,995 INFO L134 LiptonReduction]: Checked pairs total: 5485 [2023-08-29 21:41:28,995 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-29 21:41:29,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:29,014 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;@671ce4e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:29,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-29 21:41:29,017 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:41:29,018 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:29,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:29,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:29,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 21:41:29,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash 17235, now seen corresponding path program 1 times [2023-08-29 21:41:29,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:29,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772534541] [2023-08-29 21:41:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:29,422 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 21:41:29,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:29,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772534541] [2023-08-29 21:41:29,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772534541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:29,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:29,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365272873] [2023-08-29 21:41:29,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:29,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:29,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:29,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 276 [2023-08-29 21:41:29,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:29,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 276 [2023-08-29 21:41:29,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:29,627 INFO L130 PetriNetUnfolder]: 102/231 cut-off events. [2023-08-29 21:41:29,627 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:29,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 231 events. 102/231 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 966 event pairs, 68 based on Foata normal form. 25/178 useless extension candidates. Maximal degree in co-relation 433. Up to 218 conditions per place. [2023-08-29 21:41:29,634 INFO L137 encePairwiseOnDemand]: 264/276 looper letters, 34 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-29 21:41:29,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 158 flow [2023-08-29 21:41:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-29 21:41:29,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2023-08-29 21:41:29,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-29 21:41:29,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-29 21:41:29,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:29,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-29 21:41:29,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,668 INFO L175 Difference]: Start difference. First operand has 32 places, 40 transitions, 88 flow. Second operand 3 states and 423 transitions. [2023-08-29 21:41:29,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 158 flow [2023-08-29 21:41:29,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:29,673 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 82 flow [2023-08-29 21:41:29,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-29 21:41:29,677 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-29 21:41:29,678 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 82 flow [2023-08-29 21:41:29,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:29,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:29,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:41:29,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 21:41:29,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash 17234, now seen corresponding path program 1 times [2023-08-29 21:41:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:29,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462883715] [2023-08-29 21:41:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:29,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:29,716 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 21:41:29,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462883715] [2023-08-29 21:41:29,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462883715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:29,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:29,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586904848] [2023-08-29 21:41:29,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:29,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:29,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-29 21:41:29,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:29,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-29 21:41:29,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:29,826 INFO L130 PetriNetUnfolder]: 92/211 cut-off events. [2023-08-29 21:41:29,826 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-29 21:41:29,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 211 events. 92/211 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 879 event pairs, 70 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 415. Up to 178 conditions per place. [2023-08-29 21:41:29,827 INFO L137 encePairwiseOnDemand]: 271/276 looper letters, 29 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-29 21:41:29,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 152 flow [2023-08-29 21:41:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-29 21:41:29,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830917874396135 [2023-08-29 21:41:29,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-29 21:41:29,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-29 21:41:29,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:29,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-29 21:41:29,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,834 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 82 flow. Second operand 3 states and 400 transitions. [2023-08-29 21:41:29,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 152 flow [2023-08-29 21:41:29,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:29,836 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 80 flow [2023-08-29 21:41:29,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-29 21:41:29,836 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-08-29 21:41:29,837 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 80 flow [2023-08-29 21:41:29,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:29,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:29,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:41:29,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:41:29,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 21:41:29,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 513766223, now seen corresponding path program 1 times [2023-08-29 21:41:29,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:29,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376987649] [2023-08-29 21:41:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:29,926 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 21:41:29,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:29,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376987649] [2023-08-29 21:41:29,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376987649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:29,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41460799] [2023-08-29 21:41:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:29,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:29,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:29,933 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 21:41:29,958 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 21:41:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:30,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:30,079 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 6 treesize of output 5 [2023-08-29 21:41:30,136 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 21:41:30,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:30,185 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 21:41:30,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41460799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:30,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:30,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:41:30,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300462418] [2023-08-29 21:41:30,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:30,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:41:30,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:41:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:30,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-29 21:41:30,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 123.71428571428571) internal successors, (866), 7 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:30,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:30,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-29 21:41:30,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:30,391 INFO L130 PetriNetUnfolder]: 10/37 cut-off events. [2023-08-29 21:41:30,391 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:30,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 37 events. 10/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 90 event pairs, 0 based on Foata normal form. 6/40 useless extension candidates. Maximal degree in co-relation 79. Up to 22 conditions per place. [2023-08-29 21:41:30,392 INFO L137 encePairwiseOnDemand]: 272/276 looper letters, 7 selfloop transitions, 2 changer transitions 6/17 dead transitions. [2023-08-29 21:41:30,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 73 flow [2023-08-29 21:41:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 505 transitions. [2023-08-29 21:41:30,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45742753623188404 [2023-08-29 21:41:30,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 505 transitions. [2023-08-29 21:41:30,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 505 transitions. [2023-08-29 21:41:30,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:30,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 505 transitions. [2023-08-29 21:41:30,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:30,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 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 21:41:30,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 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 21:41:30,401 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 80 flow. Second operand 4 states and 505 transitions. [2023-08-29 21:41:30,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 73 flow [2023-08-29 21:41:30,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 70 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:30,402 INFO L231 Difference]: Finished difference. Result has 18 places, 8 transitions, 26 flow [2023-08-29 21:41:30,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=26, PETRI_PLACES=18, PETRI_TRANSITIONS=8} [2023-08-29 21:41:30,405 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -14 predicate places. [2023-08-29 21:41:30,405 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 8 transitions, 26 flow [2023-08-29 21:41:30,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.71428571428571) internal successors, (866), 7 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:30,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:30,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:30,420 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 21:41:30,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:30,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 21:41:30,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:30,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1253136296, now seen corresponding path program 1 times [2023-08-29 21:41:30,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:30,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872252020] [2023-08-29 21:41:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:30,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:30,684 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 21:41:30,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:30,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872252020] [2023-08-29 21:41:30,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872252020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:30,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:30,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:30,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41718956] [2023-08-29 21:41:30,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:30,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:30,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:30,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 276 [2023-08-29 21:41:30,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 8 transitions, 26 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:30,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:30,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 276 [2023-08-29 21:41:30,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:30,713 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-29 21:41:30,713 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:30,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 13 events. 2/13 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 15 event pairs, 2 based on Foata normal form. 2/15 useless extension candidates. Maximal degree in co-relation 27. Up to 10 conditions per place. [2023-08-29 21:41:30,714 INFO L137 encePairwiseOnDemand]: 274/276 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-29 21:41:30,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 34 flow [2023-08-29 21:41:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-29 21:41:30,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673913043478261 [2023-08-29 21:41:30,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-29 21:41:30,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-29 21:41:30,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:30,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-29 21:41:30,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:30,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:30,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:30,719 INFO L175 Difference]: Start difference. First operand has 18 places, 8 transitions, 26 flow. Second operand 3 states and 387 transitions. [2023-08-29 21:41:30,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 34 flow [2023-08-29 21:41:30,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:30,721 INFO L231 Difference]: Finished difference. Result has 14 places, 0 transitions, 0 flow [2023-08-29 21:41:30,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=14, PETRI_TRANSITIONS=0} [2023-08-29 21:41:30,722 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -18 predicate places. [2023-08-29 21:41:30,722 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 0 transitions, 0 flow [2023-08-29 21:41:30,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:30,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-29 21:41:30,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-29 21:41:30,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2023-08-29 21:41:30,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-08-29 21:41:30,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-29 21:41:30,728 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-08-29 21:41:30,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 7 remaining) [2023-08-29 21:41:30,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:41:30,729 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 21:41:30,731 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:30,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 145 transitions, 298 flow [2023-08-29 21:41:30,762 INFO L130 PetriNetUnfolder]: 26/222 cut-off events. [2023-08-29 21:41:30,763 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:30,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 222 events. 26/222 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 625 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-29 21:41:30,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 145 transitions, 298 flow [2023-08-29 21:41:30,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 140 transitions, 285 flow [2023-08-29 21:41:30,765 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:30,766 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 140 transitions, 285 flow [2023-08-29 21:41:30,766 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 140 transitions, 285 flow [2023-08-29 21:41:30,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 140 transitions, 285 flow [2023-08-29 21:41:30,791 INFO L130 PetriNetUnfolder]: 25/217 cut-off events. [2023-08-29 21:41:30,791 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:30,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 25/217 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 588 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-29 21:41:30,793 INFO L119 LiptonReduction]: Number of co-enabled transitions 3320 [2023-08-29 21:41:33,944 INFO L134 LiptonReduction]: Checked pairs total: 4809 [2023-08-29 21:41:33,945 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-29 21:41:33,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:33,947 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;@671ce4e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:33,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:33,951 INFO L130 PetriNetUnfolder]: 6/33 cut-off events. [2023-08-29 21:41:33,951 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:33,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:33,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:41:33,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:33,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:33,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1621141110, now seen corresponding path program 1 times [2023-08-29 21:41:33,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:33,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980298061] [2023-08-29 21:41:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:33,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:33,965 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:33,986 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:33,987 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:33,987 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:33,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:41:33,987 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:33,988 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:33,988 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:33,988 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:41:34,008 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:41:34,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:34,034 INFO L130 PetriNetUnfolder]: 43/350 cut-off events. [2023-08-29 21:41:34,035 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:34,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 350 events. 43/350 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1272 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 224. Up to 9 conditions per place. [2023-08-29 21:41:34,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:34,038 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:34,038 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:34,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:34,039 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:34,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:34,066 INFO L130 PetriNetUnfolder]: 43/350 cut-off events. [2023-08-29 21:41:34,066 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:34,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 350 events. 43/350 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1272 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 224. Up to 9 conditions per place. [2023-08-29 21:41:34,072 INFO L119 LiptonReduction]: Number of co-enabled transitions 7880 [2023-08-29 21:41:37,494 INFO L134 LiptonReduction]: Checked pairs total: 14375 [2023-08-29 21:41:37,494 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-08-29 21:41:37,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:37,497 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;@671ce4e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:37,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-29 21:41:37,498 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:41:37,498 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:37,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:37,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:37,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 21:41:37,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash 32179, now seen corresponding path program 1 times [2023-08-29 21:41:37,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:37,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797662071] [2023-08-29 21:41:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:37,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:37,545 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 21:41:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797662071] [2023-08-29 21:41:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797662071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:37,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:37,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:37,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955611582] [2023-08-29 21:41:37,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:37,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:37,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:37,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:37,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 312 [2023-08-29 21:41:37,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:37,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:37,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 312 [2023-08-29 21:41:37,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:37,865 INFO L130 PetriNetUnfolder]: 1896/3088 cut-off events. [2023-08-29 21:41:37,865 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-08-29 21:41:37,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6198 conditions, 3088 events. 1896/3088 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16272 event pairs, 1536 based on Foata normal form. 202/2396 useless extension candidates. Maximal degree in co-relation 2016. Up to 2687 conditions per place. [2023-08-29 21:41:37,882 INFO L137 encePairwiseOnDemand]: 296/312 looper letters, 47 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-29 21:41:37,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 226 flow [2023-08-29 21:41:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-29 21:41:37,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149572649572649 [2023-08-29 21:41:37,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-29 21:41:37,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-29 21:41:37,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:37,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-29 21:41:37,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:37,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:37,889 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:37,889 INFO L175 Difference]: Start difference. First operand has 44 places, 54 transitions, 126 flow. Second operand 3 states and 482 transitions. [2023-08-29 21:41:37,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 226 flow [2023-08-29 21:41:37,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 226 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:37,894 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 106 flow [2023-08-29 21:41:37,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-29 21:41:37,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-29 21:41:37,896 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 106 flow [2023-08-29 21:41:37,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:37,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:37,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:37,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:41:37,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 21:41:37,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash 32177, now seen corresponding path program 1 times [2023-08-29 21:41:37,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:37,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564933505] [2023-08-29 21:41:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:37,960 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 21:41:37,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:37,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564933505] [2023-08-29 21:41:37,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564933505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:37,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:37,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:37,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453941835] [2023-08-29 21:41:37,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:37,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:37,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 312 [2023-08-29 21:41:37,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:37,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:37,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 312 [2023-08-29 21:41:37,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:38,270 INFO L130 PetriNetUnfolder]: 1893/3088 cut-off events. [2023-08-29 21:41:38,271 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-08-29 21:41:38,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6336 conditions, 3088 events. 1893/3088 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15920 event pairs, 804 based on Foata normal form. 0/2263 useless extension candidates. Maximal degree in co-relation 5456. Up to 3030 conditions per place. [2023-08-29 21:41:38,289 INFO L137 encePairwiseOnDemand]: 308/312 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-29 21:41:38,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 216 flow [2023-08-29 21:41:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-29 21:41:38,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2023-08-29 21:41:38,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-29 21:41:38,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-29 21:41:38,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:38,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-29 21:41:38,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,296 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 106 flow. Second operand 3 states and 471 transitions. [2023-08-29 21:41:38,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 216 flow [2023-08-29 21:41:38,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:38,301 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 114 flow [2023-08-29 21:41:38,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-29 21:41:38,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-29 21:41:38,303 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 114 flow [2023-08-29 21:41:38,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:38,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:41:38,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 21:41:38,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -322144903, now seen corresponding path program 1 times [2023-08-29 21:41:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:38,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159225797] [2023-08-29 21:41:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:38,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:38,356 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 21:41:38,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:38,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159225797] [2023-08-29 21:41:38,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159225797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:38,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:38,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:38,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382455681] [2023-08-29 21:41:38,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:38,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:38,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:38,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:38,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 312 [2023-08-29 21:41:38,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:38,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 312 [2023-08-29 21:41:38,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:38,690 INFO L130 PetriNetUnfolder]: 2339/3885 cut-off events. [2023-08-29 21:41:38,690 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-08-29 21:41:38,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7864 conditions, 3885 events. 2339/3885 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 20174 event pairs, 1078 based on Foata normal form. 0/2940 useless extension candidates. Maximal degree in co-relation 7814. Up to 2399 conditions per place. [2023-08-29 21:41:38,708 INFO L137 encePairwiseOnDemand]: 307/312 looper letters, 57 selfloop transitions, 2 changer transitions 2/64 dead transitions. [2023-08-29 21:41:38,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 284 flow [2023-08-29 21:41:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-29 21:41:38,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245726495726496 [2023-08-29 21:41:38,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-29 21:41:38,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-29 21:41:38,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:38,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-29 21:41:38,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,715 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 114 flow. Second operand 3 states and 491 transitions. [2023-08-29 21:41:38,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 284 flow [2023-08-29 21:41:38,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:38,719 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 122 flow [2023-08-29 21:41:38,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-29 21:41:38,720 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-29 21:41:38,720 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 122 flow [2023-08-29 21:41:38,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:38,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:38,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:38,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:41:38,721 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 21:41:38,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:38,722 INFO L85 PathProgramCache]: Analyzing trace with hash -322361000, now seen corresponding path program 1 times [2023-08-29 21:41:38,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:38,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377484349] [2023-08-29 21:41:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:38,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:38,801 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 21:41:38,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:38,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377484349] [2023-08-29 21:41:38,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377484349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:38,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780055235] [2023-08-29 21:41:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:38,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:38,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:38,804 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 21:41:38,847 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 21:41:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:38,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:38,915 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 6 treesize of output 5 [2023-08-29 21:41:38,955 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 21:41:38,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:39,007 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 21:41:39,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780055235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:39,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:39,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:41:39,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428532996] [2023-08-29 21:41:39,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:39,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:41:39,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:39,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:41:39,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:41:39,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 312 [2023-08-29 21:41:39,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 138.875) internal successors, (1111), 8 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:39,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:39,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 312 [2023-08-29 21:41:39,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:39,255 INFO L130 PetriNetUnfolder]: 160/295 cut-off events. [2023-08-29 21:41:39,255 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:41:39,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 295 events. 160/295 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1017 event pairs, 0 based on Foata normal form. 42/336 useless extension candidates. Maximal degree in co-relation 643. Up to 192 conditions per place. [2023-08-29 21:41:39,256 INFO L137 encePairwiseOnDemand]: 308/312 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-29 21:41:39,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 34 transitions, 151 flow [2023-08-29 21:41:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:41:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:41:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 722 transitions. [2023-08-29 21:41:39,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46282051282051284 [2023-08-29 21:41:39,259 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 722 transitions. [2023-08-29 21:41:39,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 722 transitions. [2023-08-29 21:41:39,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:39,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 722 transitions. [2023-08-29 21:41:39,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:39,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:39,264 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 312.0) internal successors, (1872), 6 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:39,264 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 122 flow. Second operand 5 states and 722 transitions. [2023-08-29 21:41:39,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 34 transitions, 151 flow [2023-08-29 21:41:39,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 149 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:39,266 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-29 21:41:39,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-29 21:41:39,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -16 predicate places. [2023-08-29 21:41:39,269 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-29 21:41:39,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.875) internal successors, (1111), 8 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:39,272 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2023-08-29 21:41:39,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-29 21:41:39,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2023-08-29 21:41:39,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2023-08-29 21:41:39,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-29 21:41:39,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-29 21:41:39,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2023-08-29 21:41:39,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 8 remaining) [2023-08-29 21:41:39,287 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 21:41:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-29 21:41:39,481 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 21:41:39,482 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:39,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:39,508 INFO L130 PetriNetUnfolder]: 43/350 cut-off events. [2023-08-29 21:41:39,508 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:39,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 350 events. 43/350 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1272 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 224. Up to 9 conditions per place. [2023-08-29 21:41:39,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:39,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:39,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:39,512 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:39,512 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:39,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 167 transitions, 352 flow [2023-08-29 21:41:39,539 INFO L130 PetriNetUnfolder]: 43/350 cut-off events. [2023-08-29 21:41:39,540 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:39,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 350 events. 43/350 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1272 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 224. Up to 9 conditions per place. [2023-08-29 21:41:39,546 INFO L119 LiptonReduction]: Number of co-enabled transitions 7880 [2023-08-29 21:41:42,461 INFO L134 LiptonReduction]: Checked pairs total: 13211 [2023-08-29 21:41:42,461 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-08-29 21:41:42,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:42,463 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;@671ce4e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:42,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:42,468 INFO L130 PetriNetUnfolder]: 19/78 cut-off events. [2023-08-29 21:41:42,468 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:41:42,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:42,469 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:41:42,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:42,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1706555779, now seen corresponding path program 1 times [2023-08-29 21:41:42,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:42,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010250804] [2023-08-29 21:41:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:42,481 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:42,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:42,492 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:42,493 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:42,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:41:42,493 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:42,494 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:42,494 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:42,494 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:41:42,507 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:41:42,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 189 transitions, 408 flow [2023-08-29 21:41:42,546 INFO L130 PetriNetUnfolder]: 65/519 cut-off events. [2023-08-29 21:41:42,546 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:42,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 519 events. 65/519 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2139 event pairs, 1 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 358. Up to 16 conditions per place. [2023-08-29 21:41:42,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 189 transitions, 408 flow [2023-08-29 21:41:42,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 189 transitions, 408 flow [2023-08-29 21:41:42,553 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:42,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 189 transitions, 408 flow [2023-08-29 21:41:42,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 189 transitions, 408 flow [2023-08-29 21:41:42,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 189 transitions, 408 flow [2023-08-29 21:41:42,594 INFO L130 PetriNetUnfolder]: 65/519 cut-off events. [2023-08-29 21:41:42,595 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:42,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 519 events. 65/519 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2139 event pairs, 1 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 358. Up to 16 conditions per place. [2023-08-29 21:41:42,608 INFO L119 LiptonReduction]: Number of co-enabled transitions 13200 [2023-08-29 21:41:45,637 INFO L134 LiptonReduction]: Checked pairs total: 21981 [2023-08-29 21:41:45,637 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-29 21:41:45,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:45,639 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;@671ce4e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:45,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-29 21:41:45,641 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-29 21:41:45,641 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:45,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:45,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:45,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:41:45,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash 48938, now seen corresponding path program 1 times [2023-08-29 21:41:45,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:45,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839617101] [2023-08-29 21:41:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:45,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:45,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:45,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839617101] [2023-08-29 21:41:45,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839617101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:45,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:45,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:45,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727562863] [2023-08-29 21:41:45,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:45,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:45,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:45,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:45,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:45,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 357 [2023-08-29 21:41:45,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:45,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:45,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 357 [2023-08-29 21:41:45,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:47,338 INFO L130 PetriNetUnfolder]: 15567/22325 cut-off events. [2023-08-29 21:41:47,339 INFO L131 PetriNetUnfolder]: For 684/684 co-relation queries the response was YES. [2023-08-29 21:41:47,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44860 conditions, 22325 events. 15567/22325 cut-off events. For 684/684 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 137878 event pairs, 12833 based on Foata normal form. 1362/18272 useless extension candidates. Maximal degree in co-relation 5426. Up to 19196 conditions per place. [2023-08-29 21:41:47,465 INFO L137 encePairwiseOnDemand]: 339/357 looper letters, 57 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-29 21:41:47,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 280 flow [2023-08-29 21:41:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-08-29 21:41:47,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-08-29 21:41:47,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-08-29 21:41:47,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-08-29 21:41:47,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:47,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-08-29 21:41:47,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:47,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:47,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:47,471 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 158 flow. Second operand 3 states and 544 transitions. [2023-08-29 21:41:47,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 280 flow [2023-08-29 21:41:47,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 280 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:47,474 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 132 flow [2023-08-29 21:41:47,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-08-29 21:41:47,475 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2023-08-29 21:41:47,475 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 132 flow [2023-08-29 21:41:47,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:47,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:47,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:47,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:41:47,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:41:47,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash 48939, now seen corresponding path program 1 times [2023-08-29 21:41:47,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:47,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206203532] [2023-08-29 21:41:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:47,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:47,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:47,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206203532] [2023-08-29 21:41:47,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206203532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:47,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:47,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:47,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997684825] [2023-08-29 21:41:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:47,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:47,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:47,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:47,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 357 [2023-08-29 21:41:47,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:47,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:47,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 357 [2023-08-29 21:41:47,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:49,008 INFO L130 PetriNetUnfolder]: 15564/22300 cut-off events. [2023-08-29 21:41:49,008 INFO L131 PetriNetUnfolder]: For 1000/1000 co-relation queries the response was YES. [2023-08-29 21:41:49,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45721 conditions, 22300 events. 15564/22300 cut-off events. For 1000/1000 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 133587 event pairs, 9727 based on Foata normal form. 0/17328 useless extension candidates. Maximal degree in co-relation 39056. Up to 22057 conditions per place. [2023-08-29 21:41:49,126 INFO L137 encePairwiseOnDemand]: 353/357 looper letters, 48 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-29 21:41:49,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 246 flow [2023-08-29 21:41:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-08-29 21:41:49,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488328664799253 [2023-08-29 21:41:49,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-08-29 21:41:49,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-08-29 21:41:49,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:49,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-08-29 21:41:49,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,133 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 132 flow. Second operand 3 states and 523 transitions. [2023-08-29 21:41:49,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 246 flow [2023-08-29 21:41:49,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:49,165 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 140 flow [2023-08-29 21:41:49,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-08-29 21:41:49,167 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-08-29 21:41:49,167 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 140 flow [2023-08-29 21:41:49,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:49,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:49,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:41:49,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:41:49,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:49,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2009336425, now seen corresponding path program 1 times [2023-08-29 21:41:49,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:49,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881994735] [2023-08-29 21:41:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:49,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:49,228 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 21:41:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881994735] [2023-08-29 21:41:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881994735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:49,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:49,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:49,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856663524] [2023-08-29 21:41:49,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:49,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:49,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:49,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:49,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:49,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 357 [2023-08-29 21:41:49,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:49,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 357 [2023-08-29 21:41:49,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:50,887 INFO L130 PetriNetUnfolder]: 19251/28061 cut-off events. [2023-08-29 21:41:50,888 INFO L131 PetriNetUnfolder]: For 1101/1101 co-relation queries the response was YES. [2023-08-29 21:41:50,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56697 conditions, 28061 events. 19251/28061 cut-off events. For 1101/1101 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 171021 event pairs, 8537 based on Foata normal form. 0/22394 useless extension candidates. Maximal degree in co-relation 56651. Up to 17561 conditions per place. [2023-08-29 21:41:51,002 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 68 selfloop transitions, 2 changer transitions 2/76 dead transitions. [2023-08-29 21:41:51,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 76 transitions, 345 flow [2023-08-29 21:41:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-29 21:41:51,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135387488328664 [2023-08-29 21:41:51,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-29 21:41:51,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-29 21:41:51,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:51,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-29 21:41:51,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,008 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 140 flow. Second operand 3 states and 550 transitions. [2023-08-29 21:41:51,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 76 transitions, 345 flow [2023-08-29 21:41:51,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:51,012 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 146 flow [2023-08-29 21:41:51,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-29 21:41:51,013 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-29 21:41:51,013 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 146 flow [2023-08-29 21:41:51,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:51,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:51,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:41:51,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:41:51,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2009598955, now seen corresponding path program 1 times [2023-08-29 21:41:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:51,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330743507] [2023-08-29 21:41:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:51,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:51,088 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 21:41:51,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:51,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330743507] [2023-08-29 21:41:51,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330743507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:51,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422331216] [2023-08-29 21:41:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:51,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:51,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:51,091 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 21:41:51,117 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 21:41:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:51,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:51,172 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 6 treesize of output 5 [2023-08-29 21:41:51,211 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 21:41:51,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:51,246 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 21:41:51,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422331216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:51,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:51,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:41:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567002823] [2023-08-29 21:41:51,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:41:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:41:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:41:51,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 357 [2023-08-29 21:41:51,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 146 flow. Second operand has 8 states, 8 states have (on average 155.875) internal successors, (1247), 8 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:51,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 357 [2023-08-29 21:41:51,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:52,883 INFO L130 PetriNetUnfolder]: 19241/28381 cut-off events. [2023-08-29 21:41:52,884 INFO L131 PetriNetUnfolder]: For 2574/2574 co-relation queries the response was YES. [2023-08-29 21:41:52,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59688 conditions, 28381 events. 19241/28381 cut-off events. For 2574/2574 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 177134 event pairs, 1703 based on Foata normal form. 5/24773 useless extension candidates. Maximal degree in co-relation 20157. Up to 19892 conditions per place. [2023-08-29 21:41:53,057 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 104 selfloop transitions, 8 changer transitions 1/117 dead transitions. [2023-08-29 21:41:53,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 117 transitions, 531 flow [2023-08-29 21:41:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:41:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:41:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1039 transitions. [2023-08-29 21:41:53,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850606909430439 [2023-08-29 21:41:53,061 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1039 transitions. [2023-08-29 21:41:53,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1039 transitions. [2023-08-29 21:41:53,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:53,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1039 transitions. [2023-08-29 21:41:53,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.16666666666666) internal successors, (1039), 6 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,068 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,068 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 146 flow. Second operand 6 states and 1039 transitions. [2023-08-29 21:41:53,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 117 transitions, 531 flow [2023-08-29 21:41:53,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 117 transitions, 526 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:53,071 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 166 flow [2023-08-29 21:41:53,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-29 21:41:53,072 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2023-08-29 21:41:53,072 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 166 flow [2023-08-29 21:41:53,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 155.875) internal successors, (1247), 8 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:53,073 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:53,085 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 21:41:53,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:53,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:41:53,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1120724299, now seen corresponding path program 1 times [2023-08-29 21:41:53,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:53,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056311712] [2023-08-29 21:41:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:53,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:41:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:53,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056311712] [2023-08-29 21:41:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056311712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:53,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:53,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693656913] [2023-08-29 21:41:53,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:53,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:53,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:53,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 357 [2023-08-29 21:41:53,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:53,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 357 [2023-08-29 21:41:53,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:55,212 INFO L130 PetriNetUnfolder]: 25030/36359 cut-off events. [2023-08-29 21:41:55,212 INFO L131 PetriNetUnfolder]: For 4667/4667 co-relation queries the response was YES. [2023-08-29 21:41:55,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78602 conditions, 36359 events. 25030/36359 cut-off events. For 4667/4667 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 231797 event pairs, 17359 based on Foata normal form. 0/33376 useless extension candidates. Maximal degree in co-relation 25537. Up to 27841 conditions per place. [2023-08-29 21:41:55,341 INFO L137 encePairwiseOnDemand]: 353/357 looper letters, 70 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-29 21:41:55,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 372 flow [2023-08-29 21:41:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-08-29 21:41:55,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2023-08-29 21:41:55,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-08-29 21:41:55,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-08-29 21:41:55,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:55,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-08-29 21:41:55,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:55,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:55,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:55,348 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 166 flow. Second operand 3 states and 543 transitions. [2023-08-29 21:41:55,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 372 flow [2023-08-29 21:41:55,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 363 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:55,354 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 176 flow [2023-08-29 21:41:55,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-29 21:41:55,355 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2023-08-29 21:41:55,355 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 176 flow [2023-08-29 21:41:55,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:55,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:55,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:55,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:41:55,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:41:55,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:55,356 INFO L85 PathProgramCache]: Analyzing trace with hash -382640300, now seen corresponding path program 1 times [2023-08-29 21:41:55,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:55,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406524807] [2023-08-29 21:41:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:55,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-29 21:41:55,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:55,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406524807] [2023-08-29 21:41:55,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406524807] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:55,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:55,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:41:55,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545866091] [2023-08-29 21:41:55,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:55,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:55,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:55,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:55,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:41:55,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-08-29 21:41:55,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:55,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:55,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-08-29 21:41:55,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:57,239 INFO L130 PetriNetUnfolder]: 21187/30961 cut-off events. [2023-08-29 21:41:57,240 INFO L131 PetriNetUnfolder]: For 5803/5803 co-relation queries the response was YES. [2023-08-29 21:41:57,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68475 conditions, 30961 events. 21187/30961 cut-off events. For 5803/5803 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 194210 event pairs, 16016 based on Foata normal form. 546/30312 useless extension candidates. Maximal degree in co-relation 21658. Up to 24473 conditions per place. [2023-08-29 21:41:57,397 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 81 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2023-08-29 21:41:57,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 450 flow [2023-08-29 21:41:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 704 transitions. [2023-08-29 21:41:57,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2023-08-29 21:41:57,400 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 704 transitions. [2023-08-29 21:41:57,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 704 transitions. [2023-08-29 21:41:57,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:57,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 704 transitions. [2023-08-29 21:41:57,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:57,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:57,404 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:57,405 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 176 flow. Second operand 4 states and 704 transitions. [2023-08-29 21:41:57,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 450 flow [2023-08-29 21:41:57,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 447 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:57,413 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 195 flow [2023-08-29 21:41:57,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-08-29 21:41:57,413 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2023-08-29 21:41:57,414 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 195 flow [2023-08-29 21:41:57,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:57,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:57,414 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:57,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:41:57,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:41:57,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:57,415 INFO L85 PathProgramCache]: Analyzing trace with hash 615612564, now seen corresponding path program 1 times [2023-08-29 21:41:57,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:57,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740921248] [2023-08-29 21:41:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:57,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:41:57,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:57,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740921248] [2023-08-29 21:41:57,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740921248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:57,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:57,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:57,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482738590] [2023-08-29 21:41:57,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:57,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:57,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:57,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:57,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:57,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 357 [2023-08-29 21:41:57,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 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 21:41:57,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:57,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 357 [2023-08-29 21:41:57,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:59,373 INFO L130 PetriNetUnfolder]: 23716/36793 cut-off events. [2023-08-29 21:41:59,373 INFO L131 PetriNetUnfolder]: For 11078/11078 co-relation queries the response was YES. [2023-08-29 21:41:59,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84664 conditions, 36793 events. 23716/36793 cut-off events. For 11078/11078 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 268920 event pairs, 9123 based on Foata normal form. 2927/39230 useless extension candidates. Maximal degree in co-relation 54034. Up to 21653 conditions per place. [2023-08-29 21:41:59,837 INFO L137 encePairwiseOnDemand]: 344/357 looper letters, 80 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2023-08-29 21:41:59,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 98 transitions, 549 flow [2023-08-29 21:41:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-29 21:41:59,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4911297852474323 [2023-08-29 21:41:59,839 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-29 21:41:59,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-29 21:41:59,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:59,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-29 21:41:59,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,842 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 195 flow. Second operand 3 states and 526 transitions. [2023-08-29 21:41:59,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 98 transitions, 549 flow [2023-08-29 21:42:00,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 98 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:00,158 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 276 flow [2023-08-29 21:42:00,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2023-08-29 21:42:00,158 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-29 21:42:00,159 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 276 flow [2023-08-29 21:42:00,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 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 21:42:00,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:00,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:00,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:42:00,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:42:00,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1923101649, now seen corresponding path program 1 times [2023-08-29 21:42:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:00,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817182924] [2023-08-29 21:42:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:00,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:00,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:00,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817182924] [2023-08-29 21:42:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817182924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:00,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954767219] [2023-08-29 21:42:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:00,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:00,241 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 21:42:00,243 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 21:42:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:00,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:42:00,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:00,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:00,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954767219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:00,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:00,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 21:42:00,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631855146] [2023-08-29 21:42:00,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:00,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:42:00,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:00,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:42:00,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:42:00,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 357 [2023-08-29 21:42:00,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 276 flow. Second operand has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:00,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:00,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 357 [2023-08-29 21:42:00,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:00,556 INFO L130 PetriNetUnfolder]: 828/1459 cut-off events. [2023-08-29 21:42:00,556 INFO L131 PetriNetUnfolder]: For 1547/1547 co-relation queries the response was YES. [2023-08-29 21:42:00,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4347 conditions, 1459 events. 828/1459 cut-off events. For 1547/1547 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7534 event pairs, 27 based on Foata normal form. 189/1647 useless extension candidates. Maximal degree in co-relation 4335. Up to 896 conditions per place. [2023-08-29 21:42:00,559 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 0 selfloop transitions, 0 changer transitions 70/70 dead transitions. [2023-08-29 21:42:00,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 418 flow [2023-08-29 21:42:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:42:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:42:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 996 transitions. [2023-08-29 21:42:00,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649859943977591 [2023-08-29 21:42:00,562 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 996 transitions. [2023-08-29 21:42:00,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 996 transitions. [2023-08-29 21:42:00,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:00,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 996 transitions. [2023-08-29 21:42:00,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:00,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:00,568 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:00,569 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 276 flow. Second operand 6 states and 996 transitions. [2023-08-29 21:42:00,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 418 flow [2023-08-29 21:42:00,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 383 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-29 21:42:00,572 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-29 21:42:00,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-29 21:42:00,572 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -10 predicate places. [2023-08-29 21:42:00,572 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-29 21:42:00,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:00,573 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2023-08-29 21:42:00,573 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-29 21:42:00,573 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (6 of 9 remaining) [2023-08-29 21:42:00,574 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 9 remaining) [2023-08-29 21:42:00,574 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-08-29 21:42:00,574 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-29 21:42:00,574 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2023-08-29 21:42:00,574 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-08-29 21:42:00,574 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-29 21:42:00,582 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 21:42:00,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 21:42:00,780 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:00,780 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:42:00,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 189 transitions, 408 flow [2023-08-29 21:42:00,823 INFO L130 PetriNetUnfolder]: 65/519 cut-off events. [2023-08-29 21:42:00,823 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:42:00,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 519 events. 65/519 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2139 event pairs, 1 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 358. Up to 16 conditions per place. [2023-08-29 21:42:00,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 189 transitions, 408 flow [2023-08-29 21:42:00,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 189 transitions, 408 flow [2023-08-29 21:42:00,828 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:00,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 189 transitions, 408 flow [2023-08-29 21:42:00,829 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 189 transitions, 408 flow [2023-08-29 21:42:00,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 189 transitions, 408 flow [2023-08-29 21:42:00,867 INFO L130 PetriNetUnfolder]: 65/519 cut-off events. [2023-08-29 21:42:00,867 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:42:00,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 519 events. 65/519 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2139 event pairs, 1 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 358. Up to 16 conditions per place. [2023-08-29 21:42:00,874 INFO L119 LiptonReduction]: Number of co-enabled transitions 13200 [2023-08-29 21:42:03,822 INFO L134 LiptonReduction]: Checked pairs total: 24149 [2023-08-29 21:42:03,822 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-29 21:42:03,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:42:03,824 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;@671ce4e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:03,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:42:03,831 INFO L130 PetriNetUnfolder]: 35/129 cut-off events. [2023-08-29 21:42:03,831 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:42:03,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:03,831 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:42:03,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:42:03,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash -620546085, now seen corresponding path program 1 times [2023-08-29 21:42:03,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:03,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065996645] [2023-08-29 21:42:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:03,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:03,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:42:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:03,856 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:42:03,856 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:42:03,856 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:42:03,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:42:03,857 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:42:03,857 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:42:03,857 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:42:03,857 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:42:03,872 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:42:03,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 211 transitions, 466 flow [2023-08-29 21:42:03,937 INFO L130 PetriNetUnfolder]: 99/772 cut-off events. [2023-08-29 21:42:03,937 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:42:03,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 772 events. 99/772 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3555 event pairs, 6 based on Foata normal form. 0/611 useless extension candidates. Maximal degree in co-relation 539. Up to 32 conditions per place. [2023-08-29 21:42:03,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 211 transitions, 466 flow [2023-08-29 21:42:03,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 211 transitions, 466 flow [2023-08-29 21:42:03,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:03,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 211 transitions, 466 flow [2023-08-29 21:42:03,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 211 transitions, 466 flow [2023-08-29 21:42:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 211 transitions, 466 flow [2023-08-29 21:42:04,008 INFO L130 PetriNetUnfolder]: 99/772 cut-off events. [2023-08-29 21:42:04,009 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:42:04,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 772 events. 99/772 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3555 event pairs, 6 based on Foata normal form. 0/611 useless extension candidates. Maximal degree in co-relation 539. Up to 32 conditions per place. [2023-08-29 21:42:04,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 19440 [2023-08-29 21:42:07,124 INFO L134 LiptonReduction]: Checked pairs total: 34810 [2023-08-29 21:42:07,124 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-29 21:42:07,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:42:07,125 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;@671ce4e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:07,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-29 21:42:07,126 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:42:07,126 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:07,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:07,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:07,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:42:07,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash 67628, now seen corresponding path program 1 times [2023-08-29 21:42:07,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495198213] [2023-08-29 21:42:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:07,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:07,156 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 21:42:07,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:07,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495198213] [2023-08-29 21:42:07,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495198213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:07,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:07,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617972848] [2023-08-29 21:42:07,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:07,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:07,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:07,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 395 [2023-08-29 21:42:07,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 76 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 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 21:42:07,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:07,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 395 [2023-08-29 21:42:07,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:18,724 INFO L130 PetriNetUnfolder]: 149886/206823 cut-off events. [2023-08-29 21:42:18,724 INFO L131 PetriNetUnfolder]: For 8138/8138 co-relation queries the response was YES. [2023-08-29 21:42:19,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408933 conditions, 206823 events. 149886/206823 cut-off events. For 8138/8138 co-relation queries the response was YES. Maximal size of possible extension queue 7066. Compared 1537609 event pairs, 106636 based on Foata normal form. 23380/172635 useless extension candidates. Maximal degree in co-relation 51949. Up to 197550 conditions per place. [2023-08-29 21:42:19,753 INFO L137 encePairwiseOnDemand]: 375/395 looper letters, 59 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-29 21:42:19,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 68 transitions, 302 flow [2023-08-29 21:42:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-08-29 21:42:19,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071729957805907 [2023-08-29 21:42:19,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-08-29 21:42:19,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-08-29 21:42:19,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:19,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-08-29 21:42:19,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:19,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:19,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:19,761 INFO L175 Difference]: Start difference. First operand has 63 places, 76 transitions, 196 flow. Second operand 3 states and 601 transitions. [2023-08-29 21:42:19,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 68 transitions, 302 flow [2023-08-29 21:42:19,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:42:19,763 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 176 flow [2023-08-29 21:42:19,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-29 21:42:19,764 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-29 21:42:19,764 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 176 flow [2023-08-29 21:42:19,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 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 21:42:19,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:19,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:19,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 21:42:19,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:42:19,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:19,765 INFO L85 PathProgramCache]: Analyzing trace with hash 67627, now seen corresponding path program 1 times [2023-08-29 21:42:19,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:19,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890550815] [2023-08-29 21:42:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:19,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:19,784 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 21:42:19,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:19,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890550815] [2023-08-29 21:42:19,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890550815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:19,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:19,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114003672] [2023-08-29 21:42:19,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:19,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:19,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:19,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 395 [2023-08-29 21:42:19,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:19,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:19,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 395 [2023-08-29 21:42:19,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:30,446 INFO L130 PetriNetUnfolder]: 133899/183943 cut-off events. [2023-08-29 21:42:30,447 INFO L131 PetriNetUnfolder]: For 12049/12049 co-relation queries the response was YES. [2023-08-29 21:42:30,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371167 conditions, 183943 events. 133899/183943 cut-off events. For 12049/12049 co-relation queries the response was YES. Maximal size of possible extension queue 6170. Compared 1350363 event pairs, 110783 based on Foata normal form. 0/137086 useless extension candidates. Maximal degree in co-relation 371109. Up to 151681 conditions per place. [2023-08-29 21:42:31,304 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 70 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-29 21:42:31,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 362 flow [2023-08-29 21:42:31,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-08-29 21:42:31,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928270042194093 [2023-08-29 21:42:31,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-08-29 21:42:31,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-08-29 21:42:31,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:31,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-08-29 21:42:31,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,309 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 176 flow. Second operand 3 states and 584 transitions. [2023-08-29 21:42:31,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 362 flow [2023-08-29 21:42:31,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 360 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:31,314 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 176 flow [2023-08-29 21:42:31,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-08-29 21:42:31,315 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-29 21:42:31,315 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 176 flow [2023-08-29 21:42:31,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:31,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:31,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 21:42:31,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:42:31,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1912091058, now seen corresponding path program 1 times [2023-08-29 21:42:31,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:31,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233407840] [2023-08-29 21:42:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:31,344 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 21:42:31,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:31,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233407840] [2023-08-29 21:42:31,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233407840] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:31,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:31,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:31,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462882700] [2023-08-29 21:42:31,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:31,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:31,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:31,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 395 [2023-08-29 21:42:31,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:31,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:31,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 395 [2023-08-29 21:42:31,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:43,817 INFO L130 PetriNetUnfolder]: 162826/225896 cut-off events. [2023-08-29 21:42:43,817 INFO L131 PetriNetUnfolder]: For 10916/10916 co-relation queries the response was YES. [2023-08-29 21:42:44,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461112 conditions, 225896 events. 162826/225896 cut-off events. For 10916/10916 co-relation queries the response was YES. Maximal size of possible extension queue 5947. Compared 1652203 event pairs, 75212 based on Foata normal form. 0/183889 useless extension candidates. Maximal degree in co-relation 374580. Up to 137009 conditions per place. [2023-08-29 21:42:44,870 INFO L137 encePairwiseOnDemand]: 386/395 looper letters, 83 selfloop transitions, 4 changer transitions 1/94 dead transitions. [2023-08-29 21:42:44,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 438 flow [2023-08-29 21:42:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-29 21:42:44,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198312236286919 [2023-08-29 21:42:44,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-29 21:42:44,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-29 21:42:44,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:44,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-29 21:42:44,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:44,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:44,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:44,876 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 176 flow. Second operand 3 states and 616 transitions. [2023-08-29 21:42:44,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 438 flow [2023-08-29 21:42:54,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:54,361 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 198 flow [2023-08-29 21:42:54,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2023-08-29 21:42:54,361 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-29 21:42:54,362 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 198 flow [2023-08-29 21:42:54,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:54,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:54,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 21:42:54,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:42:54,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:54,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1912379627, now seen corresponding path program 1 times [2023-08-29 21:42:54,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:54,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960527366] [2023-08-29 21:42:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:54,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:54,413 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 21:42:54,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:54,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960527366] [2023-08-29 21:42:54,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960527366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:54,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793500637] [2023-08-29 21:42:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:54,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:54,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:54,417 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 21:42:54,419 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 21:42:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:54,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:42:54,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:54,504 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 6 treesize of output 5 [2023-08-29 21:42:54,538 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 21:42:54,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:54,573 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 21:42:54,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793500637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:54,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:54,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:42:54,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418937946] [2023-08-29 21:42:54,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:54,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:42:54,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:54,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:42:54,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:42:54,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 395 [2023-08-29 21:42:54,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 171.71428571428572) internal successors, (1202), 7 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:54,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 395 [2023-08-29 21:42:54,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:07,559 INFO L130 PetriNetUnfolder]: 169041/234330 cut-off events. [2023-08-29 21:43:07,559 INFO L131 PetriNetUnfolder]: For 40667/40667 co-relation queries the response was YES. [2023-08-29 21:43:08,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514470 conditions, 234330 events. 169041/234330 cut-off events. For 40667/40667 co-relation queries the response was YES. Maximal size of possible extension queue 6080. Compared 1738201 event pairs, 28839 based on Foata normal form. 6/203991 useless extension candidates. Maximal degree in co-relation 126479. Up to 197691 conditions per place. [2023-08-29 21:43:08,774 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 142 selfloop transitions, 9 changer transitions 1/158 dead transitions. [2023-08-29 21:43:08,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 158 transitions, 761 flow [2023-08-29 21:43:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:43:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:43:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1169 transitions. [2023-08-29 21:43:08,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932489451476793 [2023-08-29 21:43:08,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1169 transitions. [2023-08-29 21:43:08,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1169 transitions. [2023-08-29 21:43:08,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:08,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1169 transitions. [2023-08-29 21:43:08,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.83333333333334) internal successors, (1169), 6 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,781 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,781 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 198 flow. Second operand 6 states and 1169 transitions. [2023-08-29 21:43:08,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 158 transitions, 761 flow [2023-08-29 21:43:08,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 158 transitions, 743 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:08,840 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 252 flow [2023-08-29 21:43:08,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2023-08-29 21:43:08,840 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 8 predicate places. [2023-08-29 21:43:08,840 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 252 flow [2023-08-29 21:43:08,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 171.71428571428572) internal successors, (1202), 7 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:08,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:08,846 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 21:43:09,041 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,SelfDestructingSolverStorable22 [2023-08-29 21:43:09,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:43:09,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1347123577, now seen corresponding path program 1 times [2023-08-29 21:43:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634888613] [2023-08-29 21:43:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:43:09,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:09,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634888613] [2023-08-29 21:43:09,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634888613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:09,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:09,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:43:09,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081462111] [2023-08-29 21:43:09,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:09,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:09,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:09,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:09,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 395 [2023-08-29 21:43:09,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:09,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:09,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 395 [2023-08-29 21:43:09,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:28,586 INFO L130 PetriNetUnfolder]: 218357/303726 cut-off events. [2023-08-29 21:43:28,586 INFO L131 PetriNetUnfolder]: For 48344/48344 co-relation queries the response was YES. [2023-08-29 21:43:29,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674181 conditions, 303726 events. 218357/303726 cut-off events. For 48344/48344 co-relation queries the response was YES. Maximal size of possible extension queue 8643. Compared 2318070 event pairs, 146331 based on Foata normal form. 0/269622 useless extension candidates. Maximal degree in co-relation 89023. Up to 226538 conditions per place. [2023-08-29 21:43:30,569 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 90 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-08-29 21:43:30,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 524 flow [2023-08-29 21:43:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-08-29 21:43:30,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509704641350211 [2023-08-29 21:43:30,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-08-29 21:43:30,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-08-29 21:43:30,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:30,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-08-29 21:43:30,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:30,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:30,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:30,573 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 252 flow. Second operand 3 states and 604 transitions. [2023-08-29 21:43:30,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 524 flow [2023-08-29 21:43:30,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 518 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 21:43:30,591 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 265 flow [2023-08-29 21:43:30,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2023-08-29 21:43:30,591 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-29 21:43:30,591 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 265 flow [2023-08-29 21:43:30,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:30,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:30,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:30,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 21:43:30,592 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:43:30,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1188764251, now seen corresponding path program 1 times [2023-08-29 21:43:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:30,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573357914] [2023-08-29 21:43:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:30,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:43:30,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:30,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573357914] [2023-08-29 21:43:30,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573357914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:30,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079444594] [2023-08-29 21:43:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:30,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:30,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:30,629 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 21:43:30,636 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 21:43:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-29 21:43:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-29 21:43:30,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:43:30,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079444594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:30,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:43:30,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-29 21:43:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640947990] [2023-08-29 21:43:30,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:30,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:43:30,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 395 [2023-08-29 21:43:30,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:30,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:30,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 395 [2023-08-29 21:43:30,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:49,227 INFO L130 PetriNetUnfolder]: 199783/278685 cut-off events. [2023-08-29 21:43:49,227 INFO L131 PetriNetUnfolder]: For 53496/53496 co-relation queries the response was YES. [2023-08-29 21:43:49,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630629 conditions, 278685 events. 199783/278685 cut-off events. For 53496/53496 co-relation queries the response was YES. Maximal size of possible extension queue 8062. Compared 2110798 event pairs, 152299 based on Foata normal form. 3261/256317 useless extension candidates. Maximal degree in co-relation 71968. Up to 221326 conditions per place. [2023-08-29 21:43:51,086 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 90 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-29 21:43:51,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 533 flow [2023-08-29 21:43:51,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-08-29 21:43:51,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088607594936709 [2023-08-29 21:43:51,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-08-29 21:43:51,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-08-29 21:43:51,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:51,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-08-29 21:43:51,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:51,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:51,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:51,092 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 265 flow. Second operand 3 states and 603 transitions. [2023-08-29 21:43:51,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 533 flow [2023-08-29 21:43:51,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:43:51,180 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 284 flow [2023-08-29 21:43:51,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-08-29 21:43:51,181 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2023-08-29 21:43:51,181 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 284 flow [2023-08-29 21:43:51,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:51,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:51,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:51,186 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 21:43:51,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:51,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:43:51,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:51,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1188764387, now seen corresponding path program 1 times [2023-08-29 21:43:51,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:51,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240813599] [2023-08-29 21:43:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:51,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-29 21:43:51,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:51,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240813599] [2023-08-29 21:43:51,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240813599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:51,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294278658] [2023-08-29 21:43:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:51,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:51,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:51,430 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 21:43:51,433 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 21:43:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:51,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:43:51,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:43:51,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 21:43:51,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294278658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:51,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:51,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-29 21:43:51,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231436105] [2023-08-29 21:43:51,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:51,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 21:43:51,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:51,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 21:43:51,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-29 21:43:51,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 395 [2023-08-29 21:43:51,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 171.7) internal successors, (1717), 10 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:51,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:51,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 395 [2023-08-29 21:43:51,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:52,410 INFO L130 PetriNetUnfolder]: 7468/10591 cut-off events. [2023-08-29 21:43:52,410 INFO L131 PetriNetUnfolder]: For 8124/8124 co-relation queries the response was YES. [2023-08-29 21:43:52,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27927 conditions, 10591 events. 7468/10591 cut-off events. For 8124/8124 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 57790 event pairs, 0 based on Foata normal form. 900/11490 useless extension candidates. Maximal degree in co-relation 27913. Up to 6072 conditions per place. [2023-08-29 21:43:52,447 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 71 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-08-29 21:43:52,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 382 flow [2023-08-29 21:43:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:43:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:43:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1262 transitions. [2023-08-29 21:43:52,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45641952983725137 [2023-08-29 21:43:52,450 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1262 transitions. [2023-08-29 21:43:52,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1262 transitions. [2023-08-29 21:43:52,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:52,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1262 transitions. [2023-08-29 21:43:52,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:52,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 395.0) internal successors, (3160), 8 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:52,454 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 395.0) internal successors, (3160), 8 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:52,455 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 284 flow. Second operand 7 states and 1262 transitions. [2023-08-29 21:43:52,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 382 flow [2023-08-29 21:43:52,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 362 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-29 21:43:52,463 INFO L231 Difference]: Finished difference. Result has 54 places, 32 transitions, 118 flow [2023-08-29 21:43:52,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=32} [2023-08-29 21:43:52,463 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-29 21:43:52,463 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 32 transitions, 118 flow [2023-08-29 21:43:52,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.7) internal successors, (1717), 10 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:52,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:52,464 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:52,471 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 21:43:52,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:52,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:43:52,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1482476278, now seen corresponding path program 1 times [2023-08-29 21:43:52,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:52,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707365571] [2023-08-29 21:43:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:52,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:52,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:52,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707365571] [2023-08-29 21:43:52,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707365571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:52,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705708389] [2023-08-29 21:43:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:52,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:52,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:52,794 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 21:43:52,797 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 21:43:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:52,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:43:52,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:52,888 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 6 treesize of output 5 [2023-08-29 21:43:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:53,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:53,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705708389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:53,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:53,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-29 21:43:53,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201228034] [2023-08-29 21:43:53,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:53,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 21:43:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 21:43:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-29 21:43:53,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 395 [2023-08-29 21:43:53,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 32 transitions, 118 flow. Second operand has 17 states, 17 states have (on average 171.47058823529412) internal successors, (2915), 17 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:53,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:53,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 395 [2023-08-29 21:43:53,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:54,101 INFO L130 PetriNetUnfolder]: 5152/7555 cut-off events. [2023-08-29 21:43:54,102 INFO L131 PetriNetUnfolder]: For 7638/7638 co-relation queries the response was YES. [2023-08-29 21:43:54,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17324 conditions, 7555 events. 5152/7555 cut-off events. For 7638/7638 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 41012 event pairs, 0 based on Foata normal form. 720/8274 useless extension candidates. Maximal degree in co-relation 17311. Up to 3444 conditions per place. [2023-08-29 21:43:54,123 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2023-08-29 21:43:54,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 360 flow [2023-08-29 21:43:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:43:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:43:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1259 transitions. [2023-08-29 21:43:54,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553345388788427 [2023-08-29 21:43:54,125 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1259 transitions. [2023-08-29 21:43:54,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1259 transitions. [2023-08-29 21:43:54,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:54,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1259 transitions. [2023-08-29 21:43:54,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.85714285714286) internal successors, (1259), 7 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:54,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 395.0) internal successors, (3160), 8 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:54,130 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 395.0) internal successors, (3160), 8 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:54,130 INFO L175 Difference]: Start difference. First operand has 54 places, 32 transitions, 118 flow. Second operand 7 states and 1259 transitions. [2023-08-29 21:43:54,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 360 flow [2023-08-29 21:43:54,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 79 transitions, 343 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 21:43:54,133 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-29 21:43:54,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-29 21:43:54,134 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -13 predicate places. [2023-08-29 21:43:54,134 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-29 21:43:54,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 171.47058823529412) internal successors, (2915), 17 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:54,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-29 21:43:54,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-29 21:43:54,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2023-08-29 21:43:54,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-08-29 21:43:54,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-08-29 21:43:54,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-08-29 21:43:54,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-29 21:43:54,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-08-29 21:43:54,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-08-29 21:43:54,136 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-08-29 21:43:54,145 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 21:43:54,344 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,SelfDestructingSolverStorable26 [2023-08-29 21:43:54,345 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:54,345 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:43:54,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 211 transitions, 466 flow [2023-08-29 21:43:54,389 INFO L130 PetriNetUnfolder]: 99/772 cut-off events. [2023-08-29 21:43:54,389 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:43:54,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 772 events. 99/772 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3555 event pairs, 6 based on Foata normal form. 0/611 useless extension candidates. Maximal degree in co-relation 539. Up to 32 conditions per place. [2023-08-29 21:43:54,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 211 transitions, 466 flow [2023-08-29 21:43:54,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 211 transitions, 466 flow [2023-08-29 21:43:54,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:54,397 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 211 transitions, 466 flow [2023-08-29 21:43:54,397 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 211 transitions, 466 flow [2023-08-29 21:43:54,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 211 transitions, 466 flow [2023-08-29 21:43:54,459 INFO L130 PetriNetUnfolder]: 99/772 cut-off events. [2023-08-29 21:43:54,459 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:43:54,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 772 events. 99/772 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3555 event pairs, 6 based on Foata normal form. 0/611 useless extension candidates. Maximal degree in co-relation 539. Up to 32 conditions per place. [2023-08-29 21:43:54,477 INFO L119 LiptonReduction]: Number of co-enabled transitions 19440 [2023-08-29 21:43:57,770 INFO L134 LiptonReduction]: Checked pairs total: 37894 [2023-08-29 21:43:57,770 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-29 21:43:57,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:43:57,771 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;@671ce4e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:57,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:43:57,779 INFO L130 PetriNetUnfolder]: 45/175 cut-off events. [2023-08-29 21:43:57,779 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:43:57,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:57,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:57,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:43:57,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1125957793, now seen corresponding path program 1 times [2023-08-29 21:43:57,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:57,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974308556] [2023-08-29 21:43:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:57,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:57,793 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:43:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:57,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:43:57,806 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:43:57,806 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:43:57,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 21:43:57,806 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:43:57,806 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:43:57,807 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:43:57,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 21:43:57,825 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-29 21:43:57,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 233 transitions, 526 flow [2023-08-29 21:43:57,912 INFO L130 PetriNetUnfolder]: 161/1197 cut-off events. [2023-08-29 21:43:57,912 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:43:57,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1308 conditions, 1197 events. 161/1197 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6363 event pairs, 23 based on Foata normal form. 0/939 useless extension candidates. Maximal degree in co-relation 817. Up to 80 conditions per place. [2023-08-29 21:43:57,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 233 transitions, 526 flow [2023-08-29 21:43:57,928 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 233 transitions, 526 flow [2023-08-29 21:43:57,928 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:57,928 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 233 transitions, 526 flow [2023-08-29 21:43:57,929 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 233 transitions, 526 flow [2023-08-29 21:43:57,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 233 transitions, 526 flow [2023-08-29 21:43:58,042 INFO L130 PetriNetUnfolder]: 161/1197 cut-off events. [2023-08-29 21:43:58,042 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:43:58,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1308 conditions, 1197 events. 161/1197 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6363 event pairs, 23 based on Foata normal form. 0/939 useless extension candidates. Maximal degree in co-relation 817. Up to 80 conditions per place. [2023-08-29 21:43:58,080 INFO L119 LiptonReduction]: Number of co-enabled transitions 26600 [2023-08-29 21:44:01,066 INFO L134 LiptonReduction]: Checked pairs total: 48889 [2023-08-29 21:44:01,066 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-29 21:44:01,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:44:01,067 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;@671ce4e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:44:01,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-29 21:44:01,068 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:44:01,069 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:44:01,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:44:01,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:44:01,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2023-08-29 21:44:01,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:44:01,069 INFO L85 PathProgramCache]: Analyzing trace with hash 88202, now seen corresponding path program 1 times [2023-08-29 21:44:01,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:44:01,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498156183] [2023-08-29 21:44:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:44:01,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:44:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:44:01,106 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 21:44:01,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:44:01,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498156183] [2023-08-29 21:44:01,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498156183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:44:01,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:44:01,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:44:01,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299457442] [2023-08-29 21:44:01,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:44:01,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:44:01,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:44:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:44:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:44:01,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 436 [2023-08-29 21:44:01,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 86 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:44:01,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:44:01,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 436 [2023-08-29 21:44:01,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:46:16,007 INFO L130 PetriNetUnfolder]: 1231887/1554866 cut-off events. [2023-08-29 21:46:16,007 INFO L131 PetriNetUnfolder]: For 76712/76712 co-relation queries the response was YES. [2023-08-29 21:46:19,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3132818 conditions, 1554866 events. 1231887/1554866 cut-off events. For 76712/76712 co-relation queries the response was YES. Maximal size of possible extension queue 36308. Compared 10887849 event pairs, 1014890 based on Foata normal form. 110846/1314970 useless extension candidates. Maximal degree in co-relation 353549. Up to 1308282 conditions per place. [2023-08-29 21:46:28,302 INFO L137 encePairwiseOnDemand]: 413/436 looper letters, 83 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-08-29 21:46:28,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 416 flow [2023-08-29 21:46:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:46:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:46:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2023-08-29 21:46:28,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168195718654435 [2023-08-29 21:46:28,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2023-08-29 21:46:28,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2023-08-29 21:46:28,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:46:28,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2023-08-29 21:46:28,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:28,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:28,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:28,310 INFO L175 Difference]: Start difference. First operand has 72 places, 86 transitions, 232 flow. Second operand 3 states and 676 transitions. [2023-08-29 21:46:28,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 416 flow [2023-08-29 21:46:28,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 416 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:46:28,331 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 194 flow [2023-08-29 21:46:28,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2023-08-29 21:46:28,332 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2023-08-29 21:46:28,333 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 194 flow [2023-08-29 21:46:28,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:28,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:46:28,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:46:28,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 21:46:28,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 8 more)] === [2023-08-29 21:46:28,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:46:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash 88203, now seen corresponding path program 1 times [2023-08-29 21:46:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:46:28,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299613124] [2023-08-29 21:46:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:46:28,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:46:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:46:28,412 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 21:46:28,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:46:28,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299613124] [2023-08-29 21:46:28,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299613124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:46:28,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:46:28,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:46:28,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840285490] [2023-08-29 21:46:28,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:46:28,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:46:28,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:46:28,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:46:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:46:28,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 436 [2023-08-29 21:46:28,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:46:28,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:46:28,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 436 [2023-08-29 21:46:28,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand