./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.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_19-callback_racing.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 a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --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 21:41:16,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:41:16,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:41:16,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:41:16,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:41:16,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:41:16,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:41:16,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:41:16,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:41:16,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:41:16,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:41:16,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:41:16,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:41:16,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:41:16,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:41:16,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:41:16,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:41:16,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:41:16,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:41:16,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:41:16,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:41:16,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:41:16,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:41:16,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:41:16,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:41:16,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:41:16,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:41:16,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:41:16,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:41:16,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:41:16,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:41:16,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:41:16,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:41:16,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:41:16,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:41:16,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:41:16,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:41:16,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:41:16,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:41:16,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:41:16,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:41:16,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:41:16,965 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:41:16,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:41:16,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:41:16,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:41:16,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:41:16,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:41:16,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:41:16,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:41:16,969 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:41:16,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:41:16,970 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:41:16,970 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:41:16,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:41:16,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:41:16,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:41:16,971 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:41:16,971 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:41:16,971 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:41:16,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:41:16,972 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:41:16,972 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:41:16,972 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:41:16,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:41:16,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:41:16,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:41:16,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:41:16,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:41:16,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:41:16,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:41:16,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:41:16,974 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:41:16,974 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:41:16,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:41:16,974 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:41:16,974 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:41:17,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:41:17,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:41:17,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:41:17,329 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:41:17,329 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:41:17,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-29 21:41:18,502 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:41:18,816 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:41:18,817 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-29 21:41:18,831 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc4785f84/3eb420a9d02e40028a8730b5756cd131/FLAG19abea67e [2023-08-29 21:41:18,851 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc4785f84/3eb420a9d02e40028a8730b5756cd131 [2023-08-29 21:41:18,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:41:18,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:41:18,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:41:18,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:41:18,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:41:18,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:41:18" (1/1) ... [2023-08-29 21:41:18,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75854082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:18, skipping insertion in model container [2023-08-29 21:41:18,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:41:18" (1/1) ... [2023-08-29 21:41:18,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:41:18,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:41:19,164 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_19-callback_racing.i[30212,30225] [2023-08-29 21:41:19,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:41:19,196 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:41:19,229 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_19-callback_racing.i[30212,30225] [2023-08-29 21:41:19,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:41:19,263 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 21:41:19,269 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:41:19,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19 WrapperNode [2023-08-29 21:41:19,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:41:19,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:19,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:41:19,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:41:19,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,310 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2023-08-29 21:41:19,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:19,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:41:19,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:41:19,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:41:19,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,334 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:41:19,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:41:19,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:41:19,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:41:19,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (1/1) ... [2023-08-29 21:41:19,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:41:19,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:19,373 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 21:41:19,397 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 21:41:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:41:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:41:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:41:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:41:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:41:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:41:19,417 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:41:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:41:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:41:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:41:19,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:41:19,419 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 21:41:19,558 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:41:19,560 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:41:19,875 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:41:19,882 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:41:19,887 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-29 21:41:19,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:19 BoogieIcfgContainer [2023-08-29 21:41:19,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:41:19,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:41:19,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:41:19,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:41:19,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:41:18" (1/3) ... [2023-08-29 21:41:19,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0c6171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:19, skipping insertion in model container [2023-08-29 21:41:19,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:19" (2/3) ... [2023-08-29 21:41:19,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0c6171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:19, skipping insertion in model container [2023-08-29 21:41:19,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:19" (3/3) ... [2023-08-29 21:41:19,902 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-08-29 21:41:19,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:41:19,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:41:19,918 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:41:19,997 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:41:20,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 143 transitions, 294 flow [2023-08-29 21:41:20,144 INFO L130 PetriNetUnfolder]: 26/220 cut-off events. [2023-08-29 21:41:20,145 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:20,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 220 events. 26/220 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 623 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-08-29 21:41:20,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 143 transitions, 294 flow [2023-08-29 21:41:20,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 143 transitions, 294 flow [2023-08-29 21:41:20,162 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:20,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 143 transitions, 294 flow [2023-08-29 21:41:20,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 143 transitions, 294 flow [2023-08-29 21:41:20,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 143 transitions, 294 flow [2023-08-29 21:41:20,236 INFO L130 PetriNetUnfolder]: 26/220 cut-off events. [2023-08-29 21:41:20,236 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:20,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 220 events. 26/220 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 623 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-08-29 21:41:20,241 INFO L119 LiptonReduction]: Number of co-enabled transitions 3320 [2023-08-29 21:41:23,775 INFO L134 LiptonReduction]: Checked pairs total: 5085 [2023-08-29 21:41:23,775 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-29 21:41:23,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:23,792 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;@408c44b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:23,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-29 21:41:23,795 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:41:23,795 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:23,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:23,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:23,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 21:41:23,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:23,801 INFO L85 PathProgramCache]: Analyzing trace with hash 17040, now seen corresponding path program 1 times [2023-08-29 21:41:23,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:23,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277925564] [2023-08-29 21:41:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:23,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:24,039 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 21:41:24,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:24,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277925564] [2023-08-29 21:41:24,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277925564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:24,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:24,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:24,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862616745] [2023-08-29 21:41:24,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:24,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:24,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:24,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:24,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 272 [2023-08-29 21:41:24,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:24,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 272 [2023-08-29 21:41:24,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:24,198 INFO L130 PetriNetUnfolder]: 95/224 cut-off events. [2023-08-29 21:41:24,199 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:24,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 224 events. 95/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 993 event pairs, 70 based on Foata normal form. 24/181 useless extension candidates. Maximal degree in co-relation 391. Up to 190 conditions per place. [2023-08-29 21:41:24,205 INFO L137 encePairwiseOnDemand]: 259/272 looper letters, 29 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-29 21:41:24,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 142 flow [2023-08-29 21:41:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-29 21:41:24,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2023-08-29 21:41:24,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-29 21:41:24,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-29 21:41:24,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:24,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-29 21:41:24,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,235 INFO L175 Difference]: Start difference. First operand has 32 places, 40 transitions, 88 flow. Second operand 3 states and 404 transitions. [2023-08-29 21:41:24,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 142 flow [2023-08-29 21:41:24,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:24,239 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 74 flow [2023-08-29 21:41:24,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=74, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-29 21:41:24,244 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-29 21:41:24,244 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 74 flow [2023-08-29 21:41:24,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:24,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:24,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:41:24,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-08-29 21:41:24,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash 17041, now seen corresponding path program 1 times [2023-08-29 21:41:24,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:24,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106838751] [2023-08-29 21:41:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:24,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:24,348 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 21:41:24,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:24,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106838751] [2023-08-29 21:41:24,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106838751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:24,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:24,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:24,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737924827] [2023-08-29 21:41:24,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:24,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:24,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:24,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 272 [2023-08-29 21:41:24,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:24,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 272 [2023-08-29 21:41:24,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:24,458 INFO L130 PetriNetUnfolder]: 92/215 cut-off events. [2023-08-29 21:41:24,459 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:24,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 215 events. 92/215 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 928 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 405. Up to 195 conditions per place. [2023-08-29 21:41:24,460 INFO L137 encePairwiseOnDemand]: 268/272 looper letters, 31 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-29 21:41:24,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 152 flow [2023-08-29 21:41:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-29 21:41:24,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2023-08-29 21:41:24,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-29 21:41:24,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-29 21:41:24,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:24,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-29 21:41:24,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,470 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 74 flow. Second operand 3 states and 404 transitions. [2023-08-29 21:41:24,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 152 flow [2023-08-29 21:41:24,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:24,473 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 78 flow [2023-08-29 21:41:24,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-29 21:41:24,474 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-08-29 21:41:24,474 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 78 flow [2023-08-29 21:41:24,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:24,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:41:24,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:41:24,475 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 21:41:24,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash 507982452, now seen corresponding path program 1 times [2023-08-29 21:41:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:24,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611536781] [2023-08-29 21:41:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:24,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:24,569 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 21:41:24,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:24,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611536781] [2023-08-29 21:41:24,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611536781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:24,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428420261] [2023-08-29 21:41:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:24,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:24,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:24,574 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 21:41:24,590 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 21:41:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:24,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:24,724 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 21:41:24,771 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 21:41:24,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:24,839 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 21:41:24,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428420261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:24,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:24,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:41:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110687563] [2023-08-29 21:41:24,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:24,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:41:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:24,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:41:24,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:24,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 272 [2023-08-29 21:41:24,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:24,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:24,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 272 [2023-08-29 21:41:24,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:24,998 INFO L130 PetriNetUnfolder]: 10/37 cut-off events. [2023-08-29 21:41:24,999 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-29 21:41:24,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 37 events. 10/37 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 94 event pairs, 0 based on Foata normal form. 6/40 useless extension candidates. Maximal degree in co-relation 67. Up to 22 conditions per place. [2023-08-29 21:41:24,999 INFO L137 encePairwiseOnDemand]: 268/272 looper letters, 7 selfloop transitions, 2 changer transitions 6/17 dead transitions. [2023-08-29 21:41:24,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 75 flow [2023-08-29 21:41:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 497 transitions. [2023-08-29 21:41:25,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568014705882353 [2023-08-29 21:41:25,003 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 497 transitions. [2023-08-29 21:41:25,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 497 transitions. [2023-08-29 21:41:25,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:25,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 497 transitions. [2023-08-29 21:41:25,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,007 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,007 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 78 flow. Second operand 4 states and 497 transitions. [2023-08-29 21:41:25,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 75 flow [2023-08-29 21:41:25,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:41:25,008 INFO L231 Difference]: Finished difference. Result has 17 places, 8 transitions, 25 flow [2023-08-29 21:41:25,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=14, 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=25, PETRI_PLACES=17, PETRI_TRANSITIONS=8} [2023-08-29 21:41:25,009 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -15 predicate places. [2023-08-29 21:41:25,013 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 8 transitions, 25 flow [2023-08-29 21:41:25,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:25,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:25,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 21:41:25,214 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 21:41:25,215 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 21:41:25,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1432426359, now seen corresponding path program 1 times [2023-08-29 21:41:25,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:25,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746069906] [2023-08-29 21:41:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:25,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:25,292 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 21:41:25,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:25,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746069906] [2023-08-29 21:41:25,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746069906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:25,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:25,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:25,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930378655] [2023-08-29 21:41:25,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:25,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:25,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:25,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:25,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:25,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-08-29 21:41:25,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 8 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:25,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-08-29 21:41:25,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:25,311 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-29 21:41:25,312 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:25,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 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 17. Up to 10 conditions per place. [2023-08-29 21:41:25,312 INFO L137 encePairwiseOnDemand]: 270/272 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-29 21:41:25,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 7 transitions, 33 flow [2023-08-29 21:41:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-29 21:41:25,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46691176470588236 [2023-08-29 21:41:25,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-29 21:41:25,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-29 21:41:25,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:25,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-29 21:41:25,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,318 INFO L175 Difference]: Start difference. First operand has 17 places, 8 transitions, 25 flow. Second operand 3 states and 381 transitions. [2023-08-29 21:41:25,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 7 transitions, 33 flow [2023-08-29 21:41:25,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:25,319 INFO L231 Difference]: Finished difference. Result has 13 places, 0 transitions, 0 flow [2023-08-29 21:41:25,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=11, 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=13, PETRI_TRANSITIONS=0} [2023-08-29 21:41:25,319 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -19 predicate places. [2023-08-29 21:41:25,320 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 0 transitions, 0 flow [2023-08-29 21:41:25,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:25,322 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-29 21:41:25,323 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-29 21:41:25,323 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2023-08-29 21:41:25,323 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-08-29 21:41:25,323 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-08-29 21:41:25,323 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-08-29 21:41:25,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 7 remaining) [2023-08-29 21:41:25,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:41:25,324 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 21:41:25,326 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:25,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 143 transitions, 294 flow [2023-08-29 21:41:25,345 INFO L130 PetriNetUnfolder]: 26/220 cut-off events. [2023-08-29 21:41:25,345 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:41:25,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 220 events. 26/220 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 623 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-08-29 21:41:25,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 143 transitions, 294 flow [2023-08-29 21:41:25,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 138 transitions, 281 flow [2023-08-29 21:41:25,347 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:25,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 138 transitions, 281 flow [2023-08-29 21:41:25,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 138 transitions, 281 flow [2023-08-29 21:41:25,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 138 transitions, 281 flow [2023-08-29 21:41:25,371 INFO L130 PetriNetUnfolder]: 25/215 cut-off events. [2023-08-29 21:41:25,371 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:25,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 215 events. 25/215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 579 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-08-29 21:41:25,373 INFO L119 LiptonReduction]: Number of co-enabled transitions 3320 [2023-08-29 21:41:28,426 INFO L134 LiptonReduction]: Checked pairs total: 4935 [2023-08-29 21:41:28,427 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-29 21:41:28,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:28,429 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;@408c44b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:28,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:28,433 INFO L130 PetriNetUnfolder]: 9/43 cut-off events. [2023-08-29 21:41:28,433 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:28,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:28,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:41:28,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:28,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:28,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1884473559, now seen corresponding path program 1 times [2023-08-29 21:41:28,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:28,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044567096] [2023-08-29 21:41:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:28,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:28,448 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:28,469 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:28,470 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:28,470 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:28,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:41:28,470 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:28,471 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:28,472 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:28,472 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:41:28,486 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:41:28,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:28,511 INFO L130 PetriNetUnfolder]: 43/348 cut-off events. [2023-08-29 21:41:28,511 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:28,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 348 events. 43/348 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1263 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 222. Up to 9 conditions per place. [2023-08-29 21:41:28,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:28,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:28,515 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:28,515 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:28,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:28,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:28,548 INFO L130 PetriNetUnfolder]: 43/348 cut-off events. [2023-08-29 21:41:28,548 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:28,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 348 events. 43/348 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1263 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 222. Up to 9 conditions per place. [2023-08-29 21:41:28,554 INFO L119 LiptonReduction]: Number of co-enabled transitions 7880 [2023-08-29 21:41:31,680 INFO L134 LiptonReduction]: Checked pairs total: 12863 [2023-08-29 21:41:31,680 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-29 21:41:31,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:31,693 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;@408c44b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:31,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-29 21:41:31,695 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:41:31,695 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:31,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:31,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:31,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 21:41:31,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash 31857, now seen corresponding path program 1 times [2023-08-29 21:41:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:31,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956706749] [2023-08-29 21:41:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:31,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:31,780 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 21:41:31,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:31,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956706749] [2023-08-29 21:41:31,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956706749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:31,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:31,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:31,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894588367] [2023-08-29 21:41:31,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:31,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:31,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:31,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:31,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:31,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 311 [2023-08-29 21:41:31,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 52 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:31,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:31,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 311 [2023-08-29 21:41:31,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:32,078 INFO L130 PetriNetUnfolder]: 1830/3004 cut-off events. [2023-08-29 21:41:32,079 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2023-08-29 21:41:32,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6021 conditions, 3004 events. 1830/3004 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15657 event pairs, 798 based on Foata normal form. 56/2223 useless extension candidates. Maximal degree in co-relation 1052. Up to 2951 conditions per place. [2023-08-29 21:41:32,092 INFO L137 encePairwiseOnDemand]: 297/311 looper letters, 45 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-29 21:41:32,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 214 flow [2023-08-29 21:41:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-29 21:41:32,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123258306538049 [2023-08-29 21:41:32,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-29 21:41:32,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-29 21:41:32,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:32,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-29 21:41:32,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,100 INFO L175 Difference]: Start difference. First operand has 43 places, 52 transitions, 122 flow. Second operand 3 states and 478 transitions. [2023-08-29 21:41:32,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 214 flow [2023-08-29 21:41:32,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:32,102 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 116 flow [2023-08-29 21:41:32,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=116, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-29 21:41:32,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-29 21:41:32,103 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 116 flow [2023-08-29 21:41:32,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:32,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:32,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:41:32,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 21:41:32,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:32,105 INFO L85 PathProgramCache]: Analyzing trace with hash 31856, now seen corresponding path program 1 times [2023-08-29 21:41:32,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:32,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479033863] [2023-08-29 21:41:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:32,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:32,140 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 21:41:32,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:32,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479033863] [2023-08-29 21:41:32,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479033863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:32,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:32,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:32,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813372771] [2023-08-29 21:41:32,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:32,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:32,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:32,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:32,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 311 [2023-08-29 21:41:32,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:32,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 311 [2023-08-29 21:41:32,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:32,413 INFO L130 PetriNetUnfolder]: 1644/2689 cut-off events. [2023-08-29 21:41:32,413 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-29 21:41:32,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5573 conditions, 2689 events. 1644/2689 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13706 event pairs, 1332 based on Foata normal form. 0/2060 useless extension candidates. Maximal degree in co-relation 5517. Up to 2333 conditions per place. [2023-08-29 21:41:32,425 INFO L137 encePairwiseOnDemand]: 306/311 looper letters, 46 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-29 21:41:32,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 234 flow [2023-08-29 21:41:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-29 21:41:32,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908896034297964 [2023-08-29 21:41:32,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-29 21:41:32,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-29 21:41:32,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:32,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-29 21:41:32,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,431 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 116 flow. Second operand 3 states and 458 transitions. [2023-08-29 21:41:32,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 234 flow [2023-08-29 21:41:32,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:32,434 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 116 flow [2023-08-29 21:41:32,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=116, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-29 21:41:32,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-29 21:41:32,436 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 116 flow [2023-08-29 21:41:32,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:32,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:32,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:41:32,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 21:41:32,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:32,437 INFO L85 PathProgramCache]: Analyzing trace with hash -620995945, now seen corresponding path program 1 times [2023-08-29 21:41:32,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:32,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423084711] [2023-08-29 21:41:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:32,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:32,535 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 21:41:32,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:32,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423084711] [2023-08-29 21:41:32,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423084711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:32,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996065318] [2023-08-29 21:41:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:32,537 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 21:41:32,547 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 21:41:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:32,611 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 21:41:32,656 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 21:41:32,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:32,701 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 21:41:32,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996065318] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:32,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:32,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:41:32,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227938750] [2023-08-29 21:41:32,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:32,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:41:32,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:41:32,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:41:32,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-29 21:41:32,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 116 flow. Second operand has 8 states, 8 states have (on average 136.875) internal successors, (1095), 8 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:32,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-29 21:41:32,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:32,929 INFO L130 PetriNetUnfolder]: 222/449 cut-off events. [2023-08-29 21:41:32,929 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-29 21:41:32,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 449 events. 222/449 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1981 event pairs, 0 based on Foata normal form. 56/460 useless extension candidates. Maximal degree in co-relation 1016. Up to 266 conditions per place. [2023-08-29 21:41:32,931 INFO L137 encePairwiseOnDemand]: 307/311 looper letters, 35 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-29 21:41:32,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 176 flow [2023-08-29 21:41:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:41:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:41:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-29 21:41:32,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46109324758842446 [2023-08-29 21:41:32,934 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-29 21:41:32,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-29 21:41:32,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:32,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-29 21:41:32,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,938 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,938 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 116 flow. Second operand 5 states and 717 transitions. [2023-08-29 21:41:32,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 176 flow [2023-08-29 21:41:32,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 173 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:32,941 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 63 flow [2023-08-29 21:41:32,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=63, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-29 21:41:32,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -12 predicate places. [2023-08-29 21:41:32,942 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 63 flow [2023-08-29 21:41:32,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 136.875) internal successors, (1095), 8 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:32,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:32,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:32,950 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 21:41:33,150 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,SelfDestructingSolverStorable7 [2023-08-29 21:41:33,150 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 5 more)] === [2023-08-29 21:41:33,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash -620781777, now seen corresponding path program 1 times [2023-08-29 21:41:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122924054] [2023-08-29 21:41:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:33,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:33,181 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 21:41:33,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:33,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122924054] [2023-08-29 21:41:33,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122924054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:33,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:33,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:33,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616624159] [2023-08-29 21:41:33,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:33,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:33,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:33,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:33,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 311 [2023-08-29 21:41:33,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:33,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:33,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 311 [2023-08-29 21:41:33,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:33,235 INFO L130 PetriNetUnfolder]: 160/297 cut-off events. [2023-08-29 21:41:33,235 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-29 21:41:33,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 297 events. 160/297 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1091 event pairs, 160 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 691. Up to 288 conditions per place. [2023-08-29 21:41:33,236 INFO L137 encePairwiseOnDemand]: 308/311 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-29 21:41:33,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 18 transitions, 91 flow [2023-08-29 21:41:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-29 21:41:33,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715969989281886 [2023-08-29 21:41:33,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-29 21:41:33,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-29 21:41:33,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:33,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-29 21:41:33,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:33,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:33,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:33,241 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 63 flow. Second operand 3 states and 440 transitions. [2023-08-29 21:41:33,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 18 transitions, 91 flow [2023-08-29 21:41:33,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 18 transitions, 84 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 21:41:33,242 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-29 21:41:33,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-29 21:41:33,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -15 predicate places. [2023-08-29 21:41:33,242 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-29 21:41:33,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:33,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2023-08-29 21:41:33,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-29 21:41:33,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2023-08-29 21:41:33,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 8 remaining) [2023-08-29 21:41:33,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-08-29 21:41:33,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-29 21:41:33,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2023-08-29 21:41:33,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 8 remaining) [2023-08-29 21:41:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:41:33,243 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 21:41:33,244 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:33,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:33,268 INFO L130 PetriNetUnfolder]: 43/348 cut-off events. [2023-08-29 21:41:33,268 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:33,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 348 events. 43/348 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1263 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 222. Up to 9 conditions per place. [2023-08-29 21:41:33,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:33,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:33,271 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:33,271 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:33,271 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:33,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 348 flow [2023-08-29 21:41:33,293 INFO L130 PetriNetUnfolder]: 43/348 cut-off events. [2023-08-29 21:41:33,293 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:41:33,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 348 events. 43/348 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1263 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 222. Up to 9 conditions per place. [2023-08-29 21:41:33,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 7880 [2023-08-29 21:41:36,316 INFO L134 LiptonReduction]: Checked pairs total: 12881 [2023-08-29 21:41:36,317 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-29 21:41:36,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:36,318 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;@408c44b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:36,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:36,323 INFO L130 PetriNetUnfolder]: 21/82 cut-off events. [2023-08-29 21:41:36,323 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:41:36,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:36,323 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:41:36,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:36,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash 625303696, now seen corresponding path program 1 times [2023-08-29 21:41:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:36,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547889678] [2023-08-29 21:41:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:36,341 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:36,353 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:36,353 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:36,353 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:36,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:41:36,353 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:36,354 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:36,354 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:36,354 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:41:36,367 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:41:36,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:36,406 INFO L130 PetriNetUnfolder]: 65/517 cut-off events. [2023-08-29 21:41:36,407 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:36,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 517 events. 65/517 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2131 event pairs, 1 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 356. Up to 16 conditions per place. [2023-08-29 21:41:36,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:36,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:36,413 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:36,413 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:36,413 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:36,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:36,450 INFO L130 PetriNetUnfolder]: 65/517 cut-off events. [2023-08-29 21:41:36,450 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:36,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 517 events. 65/517 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2131 event pairs, 1 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 356. Up to 16 conditions per place. [2023-08-29 21:41:36,464 INFO L119 LiptonReduction]: Number of co-enabled transitions 13200 [2023-08-29 21:41:39,551 INFO L134 LiptonReduction]: Checked pairs total: 22351 [2023-08-29 21:41:39,551 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-29 21:41:39,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:39,553 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;@408c44b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:39,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-29 21:41:39,554 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:41:39,554 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:39,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:39,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:39,555 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 21:41:39,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:39,555 INFO L85 PathProgramCache]: Analyzing trace with hash 48463, now seen corresponding path program 1 times [2023-08-29 21:41:39,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:39,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24460196] [2023-08-29 21:41:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:39,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:39,587 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 21:41:39,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:39,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24460196] [2023-08-29 21:41:39,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24460196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:39,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:39,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:39,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330170198] [2023-08-29 21:41:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:39,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:39,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 351 [2023-08-29 21:41:39,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:39,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:39,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 351 [2023-08-29 21:41:39,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:41,344 INFO L130 PetriNetUnfolder]: 15567/22313 cut-off events. [2023-08-29 21:41:41,345 INFO L131 PetriNetUnfolder]: For 688/688 co-relation queries the response was YES. [2023-08-29 21:41:41,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44848 conditions, 22313 events. 15567/22313 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 137893 event pairs, 12833 based on Foata normal form. 1362/18257 useless extension candidates. Maximal degree in co-relation 5426. Up to 19196 conditions per place. [2023-08-29 21:41:41,490 INFO L137 encePairwiseOnDemand]: 333/351 looper letters, 57 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-29 21:41:41,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 280 flow [2023-08-29 21:41:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-29 21:41:41,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109211775878443 [2023-08-29 21:41:41,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-29 21:41:41,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-29 21:41:41,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:41,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-29 21:41:41,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:41,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:41,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:41,496 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 158 flow. Second operand 3 states and 538 transitions. [2023-08-29 21:41:41,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 280 flow [2023-08-29 21:41:41,499 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 21:41:41,500 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 132 flow [2023-08-29 21:41:41,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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 21:41:41,501 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2023-08-29 21:41:41,501 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 132 flow [2023-08-29 21:41:41,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:41,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:41,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:41,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:41:41,502 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 21:41:41,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:41,503 INFO L85 PathProgramCache]: Analyzing trace with hash 48464, now seen corresponding path program 1 times [2023-08-29 21:41:41,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:41,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307988493] [2023-08-29 21:41:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:41,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:41,552 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 21:41:41,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:41,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307988493] [2023-08-29 21:41:41,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307988493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:41,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:41,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:41,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027154624] [2023-08-29 21:41:41,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:41,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:41,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:41,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:41,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:41,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 351 [2023-08-29 21:41:41,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:41,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:41,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 351 [2023-08-29 21:41:41,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:43,090 INFO L130 PetriNetUnfolder]: 15564/22314 cut-off events. [2023-08-29 21:41:43,091 INFO L131 PetriNetUnfolder]: For 984/984 co-relation queries the response was YES. [2023-08-29 21:41:43,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45735 conditions, 22314 events. 15564/22314 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 134179 event pairs, 9727 based on Foata normal form. 0/17356 useless extension candidates. Maximal degree in co-relation 39070. Up to 22057 conditions per place. [2023-08-29 21:41:43,230 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 48 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-29 21:41:43,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 246 flow [2023-08-29 21:41:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-29 21:41:43,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49097815764482433 [2023-08-29 21:41:43,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-29 21:41:43,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-29 21:41:43,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:43,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-29 21:41:43,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:43,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:43,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:43,236 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 132 flow. Second operand 3 states and 517 transitions. [2023-08-29 21:41:43,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 246 flow [2023-08-29 21:41:43,265 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 21:41:43,267 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 140 flow [2023-08-29 21:41:43,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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 21:41:43,269 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-08-29 21:41:43,269 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 140 flow [2023-08-29 21:41:43,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:43,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:43,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:43,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:41:43,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:41:43,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1846357987, now seen corresponding path program 1 times [2023-08-29 21:41:43,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:43,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871481624] [2023-08-29 21:41:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:43,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:43,367 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 21:41:43,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:43,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871481624] [2023-08-29 21:41:43,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871481624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:43,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006866266] [2023-08-29 21:41:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:43,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:43,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:43,373 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 21:41:43,376 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 21:41:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:43,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:43,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:43,454 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 21:41:43,483 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 21:41:43,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:43,521 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 21:41:43,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006866266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:43,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:43,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:41:43,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440669516] [2023-08-29 21:41:43,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:43,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:41:43,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:41:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:41:43,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 351 [2023-08-29 21:41:43,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 140 flow. Second operand has 7 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:43,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:43,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 351 [2023-08-29 21:41:43,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:44,908 INFO L130 PetriNetUnfolder]: 15009/22149 cut-off events. [2023-08-29 21:41:44,908 INFO L131 PetriNetUnfolder]: For 1547/1547 co-relation queries the response was YES. [2023-08-29 21:41:44,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45403 conditions, 22149 events. 15009/22149 cut-off events. For 1547/1547 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 139394 event pairs, 23 based on Foata normal form. 6/17392 useless extension candidates. Maximal degree in co-relation 9465. Up to 15757 conditions per place. [2023-08-29 21:41:45,052 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 107 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2023-08-29 21:41:45,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 120 transitions, 520 flow [2023-08-29 21:41:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:41:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:41:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1031 transitions. [2023-08-29 21:41:45,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895536562203229 [2023-08-29 21:41:45,055 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1031 transitions. [2023-08-29 21:41:45,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1031 transitions. [2023-08-29 21:41:45,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:45,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1031 transitions. [2023-08-29 21:41:45,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:45,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:45,062 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:45,062 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 140 flow. Second operand 6 states and 1031 transitions. [2023-08-29 21:41:45,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 120 transitions, 520 flow [2023-08-29 21:41:45,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 120 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:45,066 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 162 flow [2023-08-29 21:41:45,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=134, 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=162, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-29 21:41:45,067 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2023-08-29 21:41:45,067 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 162 flow [2023-08-29 21:41:45,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:45,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:45,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:45,076 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 21:41:45,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:45,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 6 more)] === [2023-08-29 21:41:45,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1846628425, now seen corresponding path program 1 times [2023-08-29 21:41:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:45,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136304868] [2023-08-29 21:41:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:45,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:45,333 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 21:41:45,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:45,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136304868] [2023-08-29 21:41:45,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136304868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:45,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:45,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:45,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102824834] [2023-08-29 21:41:45,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:45,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:45,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:45,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:45,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 351 [2023-08-29 21:41:45,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:45,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:45,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 351 [2023-08-29 21:41:45,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:46,905 INFO L130 PetriNetUnfolder]: 19241/28179 cut-off events. [2023-08-29 21:41:46,905 INFO L131 PetriNetUnfolder]: For 2108/2108 co-relation queries the response was YES. [2023-08-29 21:41:46,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58787 conditions, 28179 events. 19241/28179 cut-off events. For 2108/2108 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 171291 event pairs, 8281 based on Foata normal form. 0/23239 useless extension candidates. Maximal degree in co-relation 7548. Up to 17966 conditions per place. [2023-08-29 21:41:47,024 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 71 selfloop transitions, 2 changer transitions 3/80 dead transitions. [2023-08-29 21:41:47,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 387 flow [2023-08-29 21:41:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-08-29 21:41:47,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156695156695157 [2023-08-29 21:41:47,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-08-29 21:41:47,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-08-29 21:41:47,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:47,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-08-29 21:41:47,029 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 21:41:47,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:47,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:47,031 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 162 flow. Second operand 3 states and 543 transitions. [2023-08-29 21:41:47,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 387 flow [2023-08-29 21:41:47,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 374 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:47,037 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 161 flow [2023-08-29 21:41:47,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=153, 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=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-08-29 21:41:47,038 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2023-08-29 21:41:47,038 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 161 flow [2023-08-29 21:41:47,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:47,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:47,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:47,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:41:47,039 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 21:41:47,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:47,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1126620823, now seen corresponding path program 1 times [2023-08-29 21:41:47,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:47,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858261914] [2023-08-29 21:41:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:47,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:47,064 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 21:41:47,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:47,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858261914] [2023-08-29 21:41:47,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858261914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:47,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:47,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:47,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785853294] [2023-08-29 21:41:47,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:47,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:47,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:47,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:47,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:47,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 351 [2023-08-29 21:41:47,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:47,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:47,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 351 [2023-08-29 21:41:47,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:49,335 INFO L130 PetriNetUnfolder]: 25030/36359 cut-off events. [2023-08-29 21:41:49,336 INFO L131 PetriNetUnfolder]: For 4690/4690 co-relation queries the response was YES. [2023-08-29 21:41:49,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77341 conditions, 36359 events. 25030/36359 cut-off events. For 4690/4690 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 231429 event pairs, 17359 based on Foata normal form. 0/33377 useless extension candidates. Maximal degree in co-relation 24865. Up to 27841 conditions per place. [2023-08-29 21:41:49,522 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 70 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-29 21:41:49,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 368 flow [2023-08-29 21:41:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-29 21:41:49,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50997150997151 [2023-08-29 21:41:49,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-29 21:41:49,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-29 21:41:49,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:49,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-29 21:41:49,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,529 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 161 flow. Second operand 3 states and 537 transitions. [2023-08-29 21:41:49,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 368 flow [2023-08-29 21:41:49,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:49,539 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 176 flow [2023-08-29 21:41:49,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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 21:41:49,541 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2023-08-29 21:41:49,541 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 176 flow [2023-08-29 21:41:49,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:49,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:49,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:41:49,542 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 21:41:49,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:49,542 INFO L85 PathProgramCache]: Analyzing trace with hash -565434540, now seen corresponding path program 1 times [2023-08-29 21:41:49,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:49,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725006708] [2023-08-29 21:41:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:49,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:49,606 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 21:41:49,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:49,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725006708] [2023-08-29 21:41:49,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725006708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:49,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:49,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:41:49,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388632066] [2023-08-29 21:41:49,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:49,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:49,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:41:49,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 351 [2023-08-29 21:41:49,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:49,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:49,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 351 [2023-08-29 21:41:49,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:51,271 INFO L130 PetriNetUnfolder]: 21187/30961 cut-off events. [2023-08-29 21:41:51,271 INFO L131 PetriNetUnfolder]: For 5803/5803 co-relation queries the response was YES. [2023-08-29 21:41:51,318 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 193967 event pairs, 16016 based on Foata normal form. 546/30313 useless extension candidates. Maximal degree in co-relation 21658. Up to 24473 conditions per place. [2023-08-29 21:41:51,395 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 81 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2023-08-29 21:41:51,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 450 flow [2023-08-29 21:41:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 696 transitions. [2023-08-29 21:41:51,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49572649572649574 [2023-08-29 21:41:51,397 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 696 transitions. [2023-08-29 21:41:51,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 696 transitions. [2023-08-29 21:41:51,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:51,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 696 transitions. [2023-08-29 21:41:51,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,401 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 176 flow. Second operand 4 states and 696 transitions. [2023-08-29 21:41:51,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 450 flow [2023-08-29 21:41:51,407 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 21:41:51,408 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 195 flow [2023-08-29 21:41:51,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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 21:41:51,409 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2023-08-29 21:41:51,409 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 195 flow [2023-08-29 21:41:51,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:51,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:51,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:41:51,410 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 21:41:51,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:51,410 INFO L85 PathProgramCache]: Analyzing trace with hash -258620984, now seen corresponding path program 1 times [2023-08-29 21:41:51,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:51,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284799793] [2023-08-29 21:41:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:51,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:51,459 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 21:41:51,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:51,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284799793] [2023-08-29 21:41:51,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284799793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:51,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:51,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:41:51,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948902899] [2023-08-29 21:41:51,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:51,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:51,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:51,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 351 [2023-08-29 21:41:51,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:51,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 351 [2023-08-29 21:41:51,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:53,491 INFO L130 PetriNetUnfolder]: 27222/41586 cut-off events. [2023-08-29 21:41:53,491 INFO L131 PetriNetUnfolder]: For 11969/11969 co-relation queries the response was YES. [2023-08-29 21:41:53,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95620 conditions, 41586 events. 27222/41586 cut-off events. For 11969/11969 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 278068 event pairs, 11387 based on Foata normal form. 3494/44546 useless extension candidates. Maximal degree in co-relation 61903. Up to 24707 conditions per place. [2023-08-29 21:41:53,710 INFO L137 encePairwiseOnDemand]: 337/351 looper letters, 80 selfloop transitions, 15 changer transitions 0/98 dead transitions. [2023-08-29 21:41:53,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 98 transitions, 551 flow [2023-08-29 21:41:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-29 21:41:53,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928774928774929 [2023-08-29 21:41:53,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-29 21:41:53,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-29 21:41:53,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:53,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-29 21:41:53,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,715 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 195 flow. Second operand 3 states and 519 transitions. [2023-08-29 21:41:53,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 98 transitions, 551 flow [2023-08-29 21:41:53,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 98 transitions, 542 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:53,858 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 279 flow [2023-08-29 21:41:53,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2023-08-29 21:41:53,859 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-29 21:41:53,859 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 279 flow [2023-08-29 21:41:53,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:53,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:53,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:53,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:41:53,860 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 21:41:53,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:53,860 INFO L85 PathProgramCache]: Analyzing trace with hash 572783324, now seen corresponding path program 1 times [2023-08-29 21:41:53,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:53,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054475136] [2023-08-29 21:41:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:53,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:53,903 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 21:41:53,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:53,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054475136] [2023-08-29 21:41:53,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054475136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:53,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762938566] [2023-08-29 21:41:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:53,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:53,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:53,905 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 21:41:53,930 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 21:41:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:53,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:41:53,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:54,009 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 21:41:54,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:54,036 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 21:41:54,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762938566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:54,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:54,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:41:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448380873] [2023-08-29 21:41:54,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:54,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:41:54,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:41:54,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:41:54,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 351 [2023-08-29 21:41:54,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 279 flow. Second operand has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:54,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 351 [2023-08-29 21:41:54,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:54,247 INFO L130 PetriNetUnfolder]: 1190/1946 cut-off events. [2023-08-29 21:41:54,247 INFO L131 PetriNetUnfolder]: For 1800/1800 co-relation queries the response was YES. [2023-08-29 21:41:54,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5586 conditions, 1946 events. 1190/1946 cut-off events. For 1800/1800 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9590 event pairs, 20 based on Foata normal form. 230/2176 useless extension candidates. Maximal degree in co-relation 5574. Up to 1216 conditions per place. [2023-08-29 21:41:54,251 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 0 selfloop transitions, 0 changer transitions 70/70 dead transitions. [2023-08-29 21:41:54,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 409 flow [2023-08-29 21:41:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:41:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:41:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 984 transitions. [2023-08-29 21:41:54,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2023-08-29 21:41:54,254 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 984 transitions. [2023-08-29 21:41:54,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 984 transitions. [2023-08-29 21:41:54,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:54,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 984 transitions. [2023-08-29 21:41:54,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,261 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,261 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 279 flow. Second operand 6 states and 984 transitions. [2023-08-29 21:41:54,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 409 flow [2023-08-29 21:41:54,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 377 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-29 21:41:54,264 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-29 21:41:54,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, 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 21:41:54,265 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -10 predicate places. [2023-08-29 21:41:54,265 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-29 21:41:54,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:54,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2023-08-29 21:41:54,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-29 21:41:54,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (6 of 9 remaining) [2023-08-29 21:41:54,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 9 remaining) [2023-08-29 21:41:54,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-08-29 21:41:54,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-29 21:41:54,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2023-08-29 21:41:54,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-08-29 21:41:54,267 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-29 21:41:54,274 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 21:41:54,472 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 21:41:54,472 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:54,473 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:54,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:54,519 INFO L130 PetriNetUnfolder]: 65/517 cut-off events. [2023-08-29 21:41:54,519 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:54,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 517 events. 65/517 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2131 event pairs, 1 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 356. Up to 16 conditions per place. [2023-08-29 21:41:54,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:54,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:54,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:54,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:54,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:54,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 187 transitions, 404 flow [2023-08-29 21:41:54,564 INFO L130 PetriNetUnfolder]: 65/517 cut-off events. [2023-08-29 21:41:54,565 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:41:54,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 517 events. 65/517 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2131 event pairs, 1 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 356. Up to 16 conditions per place. [2023-08-29 21:41:54,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 13200 [2023-08-29 21:41:57,692 INFO L134 LiptonReduction]: Checked pairs total: 22127 [2023-08-29 21:41:57,693 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-29 21:41:57,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:57,694 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;@408c44b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:57,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:57,703 INFO L130 PetriNetUnfolder]: 31/121 cut-off events. [2023-08-29 21:41:57,704 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:41:57,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:57,704 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:41:57,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:57,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1419457088, now seen corresponding path program 1 times [2023-08-29 21:41:57,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:57,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336207234] [2023-08-29 21:41:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:57,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:57,722 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:57,743 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:57,743 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:57,743 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:57,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:41:57,744 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:57,747 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:57,747 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:57,747 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:41:57,769 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:41:57,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 462 flow [2023-08-29 21:41:57,843 INFO L130 PetriNetUnfolder]: 99/770 cut-off events. [2023-08-29 21:41:57,843 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:41:57,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 770 events. 99/770 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3551 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 537. Up to 32 conditions per place. [2023-08-29 21:41:57,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 462 flow [2023-08-29 21:41:57,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 209 transitions, 462 flow [2023-08-29 21:41:57,857 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:57,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 209 transitions, 462 flow [2023-08-29 21:41:57,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 209 transitions, 462 flow [2023-08-29 21:41:57,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 462 flow [2023-08-29 21:41:57,930 INFO L130 PetriNetUnfolder]: 99/770 cut-off events. [2023-08-29 21:41:57,931 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:41:57,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 770 events. 99/770 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3551 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 537. Up to 32 conditions per place. [2023-08-29 21:41:57,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 19440 [2023-08-29 21:42:01,103 INFO L134 LiptonReduction]: Checked pairs total: 34686 [2023-08-29 21:42:01,103 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-08-29 21:42:01,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:42:01,105 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;@408c44b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:01,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-29 21:42:01,106 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:42:01,106 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:01,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:01,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:01,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:42:01,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash 66927, now seen corresponding path program 1 times [2023-08-29 21:42:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:01,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214317162] [2023-08-29 21:42:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:01,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:01,139 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 21:42:01,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:01,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214317162] [2023-08-29 21:42:01,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214317162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:01,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:01,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712204181] [2023-08-29 21:42:01,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:01,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:01,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:01,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 391 [2023-08-29 21:42:01,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 76 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:01,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:01,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 391 [2023-08-29 21:42:01,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:11,604 INFO L130 PetriNetUnfolder]: 133902/184202 cut-off events. [2023-08-29 21:42:11,604 INFO L131 PetriNetUnfolder]: For 8156/8156 co-relation queries the response was YES. [2023-08-29 21:42:11,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365086 conditions, 184202 events. 133902/184202 cut-off events. For 8156/8156 co-relation queries the response was YES. Maximal size of possible extension queue 6145. Compared 1360405 event pairs, 110783 based on Foata normal form. 21057/156333 useless extension candidates. Maximal degree in co-relation 46620. Up to 151693 conditions per place. [2023-08-29 21:42:12,564 INFO L137 encePairwiseOnDemand]: 370/391 looper letters, 69 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-08-29 21:42:12,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 346 flow [2023-08-29 21:42:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-08-29 21:42:12,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514919011082694 [2023-08-29 21:42:12,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-08-29 21:42:12,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-08-29 21:42:12,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:12,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-08-29 21:42:12,568 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 21:42:12,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:12,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:12,570 INFO L175 Difference]: Start difference. First operand has 63 places, 76 transitions, 196 flow. Second operand 3 states and 604 transitions. [2023-08-29 21:42:12,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 346 flow [2023-08-29 21:42:12,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 346 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:42:12,575 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 164 flow [2023-08-29 21:42:12,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-29 21:42:12,575 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-29 21:42:12,575 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 164 flow [2023-08-29 21:42:12,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:12,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:12,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 21:42:12,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:42:12,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 66928, now seen corresponding path program 1 times [2023-08-29 21:42:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:12,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664623350] [2023-08-29 21:42:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:12,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:12,612 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 21:42:12,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664623350] [2023-08-29 21:42:12,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664623350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:12,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:12,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:12,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426951] [2023-08-29 21:42:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:12,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:12,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:12,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 391 [2023-08-29 21:42:12,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:12,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:12,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 391 [2023-08-29 21:42:12,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:23,159 INFO L130 PetriNetUnfolder]: 133899/184787 cut-off events. [2023-08-29 21:42:23,159 INFO L131 PetriNetUnfolder]: For 10215/10215 co-relation queries the response was YES. [2023-08-29 21:42:23,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371933 conditions, 184787 events. 133899/184787 cut-off events. For 10215/10215 co-relation queries the response was YES. Maximal size of possible extension queue 6257. Compared 1358555 event pairs, 94813 based on Foata normal form. 0/139345 useless extension candidates. Maximal degree in co-relation 315531. Up to 176313 conditions per place. [2023-08-29 21:42:24,174 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 56 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-29 21:42:24,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 296 flow [2023-08-29 21:42:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-29 21:42:24,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884910485933504 [2023-08-29 21:42:24,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-29 21:42:24,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-29 21:42:24,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:24,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-29 21:42:24,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:24,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:24,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:24,180 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 164 flow. Second operand 3 states and 573 transitions. [2023-08-29 21:42:24,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 296 flow [2023-08-29 21:42:25,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:25,172 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 172 flow [2023-08-29 21:42:25,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-29 21:42:25,173 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-08-29 21:42:25,173 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 172 flow [2023-08-29 21:42:25,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:25,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:25,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:25,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 21:42:25,174 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 21:42:25,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:25,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1735792969, now seen corresponding path program 1 times [2023-08-29 21:42:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:25,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190692460] [2023-08-29 21:42:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:25,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:25,207 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 21:42:25,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:25,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190692460] [2023-08-29 21:42:25,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190692460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:25,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:25,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:25,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36174433] [2023-08-29 21:42:25,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:25,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:25,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:25,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:25,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 391 [2023-08-29 21:42:25,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:25,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:25,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 391 [2023-08-29 21:42:25,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:37,782 INFO L130 PetriNetUnfolder]: 162826/225896 cut-off events. [2023-08-29 21:42:37,783 INFO L131 PetriNetUnfolder]: For 8819/8819 co-relation queries the response was YES. [2023-08-29 21:42:38,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450981 conditions, 225896 events. 162826/225896 cut-off events. For 8819/8819 co-relation queries the response was YES. Maximal size of possible extension queue 5927. Compared 1651474 event pairs, 75212 based on Foata normal form. 0/178821 useless extension candidates. Maximal degree in co-relation 450929. Up to 137009 conditions per place. [2023-08-29 21:42:39,062 INFO L137 encePairwiseOnDemand]: 382/391 looper letters, 83 selfloop transitions, 4 changer transitions 1/94 dead transitions. [2023-08-29 21:42:39,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 430 flow [2023-08-29 21:42:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 610 transitions. [2023-08-29 21:42:39,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200341005967605 [2023-08-29 21:42:39,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 610 transitions. [2023-08-29 21:42:39,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 610 transitions. [2023-08-29 21:42:39,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:39,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 610 transitions. [2023-08-29 21:42:39,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:39,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:39,068 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:39,068 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 172 flow. Second operand 3 states and 610 transitions. [2023-08-29 21:42:39,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 430 flow [2023-08-29 21:42:39,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:39,074 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 198 flow [2023-08-29 21:42:39,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, 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 21:42:39,074 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-29 21:42:39,074 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 198 flow [2023-08-29 21:42:39,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:39,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:39,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 21:42:39,075 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 21:42:39,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1735508283, now seen corresponding path program 1 times [2023-08-29 21:42:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:39,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502908478] [2023-08-29 21:42:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:39,128 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 21:42:39,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:39,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502908478] [2023-08-29 21:42:39,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502908478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:39,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004620403] [2023-08-29 21:42:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:39,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:39,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:39,133 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 21:42:39,135 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 21:42:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:42:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:39,222 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 21:42:39,250 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 21:42:39,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:39,284 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 21:42:39,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004620403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:39,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:39,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:42:39,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633431154] [2023-08-29 21:42:39,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:39,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:42:39,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:42:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:42:39,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 391 [2023-08-29 21:42:39,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:39,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:39,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 391 [2023-08-29 21:42:39,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:52,751 INFO L130 PetriNetUnfolder]: 169041/234330 cut-off events. [2023-08-29 21:42:52,751 INFO L131 PetriNetUnfolder]: For 40667/40667 co-relation queries the response was YES. [2023-08-29 21:42:53,218 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 6077. Compared 1737079 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 21:42:53,946 INFO L137 encePairwiseOnDemand]: 384/391 looper letters, 142 selfloop transitions, 9 changer transitions 1/158 dead transitions. [2023-08-29 21:42:53,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 158 transitions, 761 flow [2023-08-29 21:42:53,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:42:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:42:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1157 transitions. [2023-08-29 21:42:53,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49317988064791135 [2023-08-29 21:42:53,949 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1157 transitions. [2023-08-29 21:42:53,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1157 transitions. [2023-08-29 21:42:53,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:53,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1157 transitions. [2023-08-29 21:42:53,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.83333333333334) internal successors, (1157), 6 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:53,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:53,955 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:53,956 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 198 flow. Second operand 6 states and 1157 transitions. [2023-08-29 21:42:53,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 158 transitions, 761 flow [2023-08-29 21:42:54,034 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 21:42:54,035 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 252 flow [2023-08-29 21:42:54,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, 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 21:42:54,036 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 8 predicate places. [2023-08-29 21:42:54,036 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 252 flow [2023-08-29 21:42:54,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:54,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:54,045 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 21:42:54,245 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 21:42:54,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:42:54,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2029683852, now seen corresponding path program 1 times [2023-08-29 21:42:54,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:54,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020945673] [2023-08-29 21:42:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:54,287 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 21:42:54,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020945673] [2023-08-29 21:42:54,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020945673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:54,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:54,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:42:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255771629] [2023-08-29 21:42:54,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:54,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:54,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:54,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 391 [2023-08-29 21:42:54,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:54,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 391 [2023-08-29 21:42:54,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:13,013 INFO L130 PetriNetUnfolder]: 218357/303726 cut-off events. [2023-08-29 21:43:13,013 INFO L131 PetriNetUnfolder]: For 48344/48344 co-relation queries the response was YES. [2023-08-29 21:43:13,711 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 8624. Compared 2316517 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 21:43:14,892 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 90 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-08-29 21:43:14,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 524 flow [2023-08-29 21:43:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:43:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:43:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-29 21:43:14,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2023-08-29 21:43:14,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-29 21:43:14,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-29 21:43:14,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:14,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-29 21:43:14,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:14,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:14,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:14,896 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 252 flow. Second operand 3 states and 598 transitions. [2023-08-29 21:43:14,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 524 flow [2023-08-29 21:43:14,911 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 21:43:14,912 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 265 flow [2023-08-29 21:43:14,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, 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 21:43:14,912 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-29 21:43:14,912 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 265 flow [2023-08-29 21:43:14,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:14,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:14,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:14,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 21:43:14,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:43:14,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:14,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1504390018, now seen corresponding path program 1 times [2023-08-29 21:43:14,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:14,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334082473] [2023-08-29 21:43:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:14,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:14,972 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 21:43:14,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:14,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334082473] [2023-08-29 21:43:14,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334082473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:14,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:14,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:43:14,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854267246] [2023-08-29 21:43:14,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:14,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:43:14,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:14,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:43:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:43:15,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 391 [2023-08-29 21:43:15,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:15,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:15,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 391 [2023-08-29 21:43:15,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:33,204 INFO L130 PetriNetUnfolder]: 189771/265412 cut-off events. [2023-08-29 21:43:33,204 INFO L131 PetriNetUnfolder]: For 52041/52041 co-relation queries the response was YES. [2023-08-29 21:43:33,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601942 conditions, 265412 events. 189771/265412 cut-off events. For 52041/52041 co-relation queries the response was YES. Maximal size of possible extension queue 7737. Compared 2006097 event pairs, 142203 based on Foata normal form. 3261/246991 useless extension candidates. Maximal degree in co-relation 68682. Up to 205685 conditions per place. [2023-08-29 21:43:34,921 INFO L137 encePairwiseOnDemand]: 385/391 looper letters, 105 selfloop transitions, 9 changer transitions 0/120 dead transitions. [2023-08-29 21:43:34,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 635 flow [2023-08-29 21:43:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:43:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:43:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 779 transitions. [2023-08-29 21:43:34,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49808184143222506 [2023-08-29 21:43:34,923 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 779 transitions. [2023-08-29 21:43:34,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 779 transitions. [2023-08-29 21:43:34,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:34,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 779 transitions. [2023-08-29 21:43:34,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:34,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:34,926 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:34,926 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 265 flow. Second operand 4 states and 779 transitions. [2023-08-29 21:43:34,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 635 flow [2023-08-29 21:43:34,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 632 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:43:34,998 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 288 flow [2023-08-29 21:43:34,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2023-08-29 21:43:34,999 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2023-08-29 21:43:34,999 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 288 flow [2023-08-29 21:43:34,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:34,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:34,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:35,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 21:43:35,000 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-08-29 21:43:35,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:35,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2124332185, now seen corresponding path program 1 times [2023-08-29 21:43:35,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:35,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829874593] [2023-08-29 21:43:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:35,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:35,048 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 21:43:35,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:35,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829874593] [2023-08-29 21:43:35,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829874593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:35,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098260886] [2023-08-29 21:43:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:35,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:35,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:35,053 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 21:43:35,056 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 21:43:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:35,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:43:35,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:35,164 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 21:43:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:35,196 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 21:43:35,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098260886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:35,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:35,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:43:35,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175391000] [2023-08-29 21:43:35,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:35,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:43:35,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:43:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:43:35,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 391 [2023-08-29 21:43:35,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 288 flow. Second operand has 9 states, 9 states have (on average 174.11111111111111) internal successors, (1567), 9 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:35,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:35,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 391 [2023-08-29 21:43:35,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:35,844 INFO L130 PetriNetUnfolder]: 7468/10591 cut-off events. [2023-08-29 21:43:35,844 INFO L131 PetriNetUnfolder]: For 8124/8124 co-relation queries the response was YES. [2023-08-29 21:43:35,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27928 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 57742 event pairs, 0 based on Foata normal form. 900/11490 useless extension candidates. Maximal degree in co-relation 27914. Up to 6072 conditions per place. [2023-08-29 21:43:36,054 INFO L137 encePairwiseOnDemand]: 388/391 looper letters, 71 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2023-08-29 21:43:36,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 384 flow [2023-08-29 21:43:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:43:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:43:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1276 transitions. [2023-08-29 21:43:36,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46620387285348924 [2023-08-29 21:43:36,057 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1276 transitions. [2023-08-29 21:43:36,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1276 transitions. [2023-08-29 21:43:36,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:36,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1276 transitions. [2023-08-29 21:43:36,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:36,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:36,064 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:36,064 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 288 flow. Second operand 7 states and 1276 transitions. [2023-08-29 21:43:36,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 384 flow [2023-08-29 21:43:36,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 363 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-29 21:43:36,075 INFO L231 Difference]: Finished difference. Result has 54 places, 32 transitions, 119 flow [2023-08-29 21:43:36,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=109, 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=119, PETRI_PLACES=54, PETRI_TRANSITIONS=32} [2023-08-29 21:43:36,076 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-29 21:43:36,076 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 32 transitions, 119 flow [2023-08-29 21:43:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.11111111111111) internal successors, (1567), 9 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:36,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:36,077 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:36,087 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 21:43:36,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-29 21:43:36,284 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 21:43:36,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash -493936682, now seen corresponding path program 1 times [2023-08-29 21:43:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:36,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433532352] [2023-08-29 21:43:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:36,436 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 21:43:36,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:36,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433532352] [2023-08-29 21:43:36,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433532352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:43:36,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927551783] [2023-08-29 21:43:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:36,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:36,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:43:36,438 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 21:43:36,441 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 21:43:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:36,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 21:43:36,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:43:36,535 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 21:43:36,662 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 21:43:36,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:43:36,810 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 21:43:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927551783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:43:36,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:43:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-29 21:43:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600865890] [2023-08-29 21:43:36,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:43:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 21:43:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 21:43:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-29 21:43:37,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 391 [2023-08-29 21:43:37,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 32 transitions, 119 flow. Second operand has 17 states, 17 states have (on average 169.47058823529412) internal successors, (2881), 17 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:37,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:37,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 391 [2023-08-29 21:43:37,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:43:37,757 INFO L130 PetriNetUnfolder]: 5152/7555 cut-off events. [2023-08-29 21:43:37,757 INFO L131 PetriNetUnfolder]: For 7638/7638 co-relation queries the response was YES. [2023-08-29 21:43:37,772 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 41072 event pairs, 0 based on Foata normal form. 720/8274 useless extension candidates. Maximal degree in co-relation 17312. Up to 3444 conditions per place. [2023-08-29 21:43:37,776 INFO L137 encePairwiseOnDemand]: 388/391 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2023-08-29 21:43:37,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 361 flow [2023-08-29 21:43:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:43:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:43:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1245 transitions. [2023-08-29 21:43:37,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548776032151991 [2023-08-29 21:43:37,781 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1245 transitions. [2023-08-29 21:43:37,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1245 transitions. [2023-08-29 21:43:37,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:43:37,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1245 transitions. [2023-08-29 21:43:37,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.85714285714286) internal successors, (1245), 7 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:37,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:37,787 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:37,787 INFO L175 Difference]: Start difference. First operand has 54 places, 32 transitions, 119 flow. Second operand 7 states and 1245 transitions. [2023-08-29 21:43:37,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 361 flow [2023-08-29 21:43:37,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 79 transitions, 344 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 21:43:37,791 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-29 21:43:37,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=92, 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 21:43:37,792 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -13 predicate places. [2023-08-29 21:43:37,792 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-29 21:43:37,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 169.47058823529412) internal successors, (2881), 17 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:37,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-29 21:43:37,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-29 21:43:37,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2023-08-29 21:43:37,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-08-29 21:43:37,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-08-29 21:43:37,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-08-29 21:43:37,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-29 21:43:37,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-08-29 21:43:37,794 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-08-29 21:43:37,794 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-08-29 21:43:37,800 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 21:43:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:43:38,000 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:38,000 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:43:38,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 462 flow [2023-08-29 21:43:38,053 INFO L130 PetriNetUnfolder]: 99/770 cut-off events. [2023-08-29 21:43:38,053 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:43:38,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 770 events. 99/770 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3551 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 537. Up to 32 conditions per place. [2023-08-29 21:43:38,059 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 462 flow [2023-08-29 21:43:38,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 209 transitions, 462 flow [2023-08-29 21:43:38,062 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:38,062 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 209 transitions, 462 flow [2023-08-29 21:43:38,063 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 209 transitions, 462 flow [2023-08-29 21:43:38,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 462 flow [2023-08-29 21:43:38,123 INFO L130 PetriNetUnfolder]: 99/770 cut-off events. [2023-08-29 21:43:38,123 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:43:38,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 770 events. 99/770 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3551 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 537. Up to 32 conditions per place. [2023-08-29 21:43:38,142 INFO L119 LiptonReduction]: Number of co-enabled transitions 19440 [2023-08-29 21:43:41,239 INFO L134 LiptonReduction]: Checked pairs total: 34576 [2023-08-29 21:43:41,239 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-08-29 21:43:41,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:43:41,240 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;@408c44b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:41,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:43:41,250 INFO L130 PetriNetUnfolder]: 45/175 cut-off events. [2023-08-29 21:43:41,251 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:43:41,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:41,251 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:43:41,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:43:41,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:41,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1601530718, now seen corresponding path program 1 times [2023-08-29 21:43:41,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:41,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207623053] [2023-08-29 21:43:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:41,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:41,273 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:43:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:43:41,294 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:43:41,294 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:43:41,295 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:43:41,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 21:43:41,295 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:43:41,296 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:43:41,297 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:43:41,297 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 21:43:41,321 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-29 21:43:41,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 231 transitions, 522 flow [2023-08-29 21:43:41,441 INFO L130 PetriNetUnfolder]: 161/1195 cut-off events. [2023-08-29 21:43:41,441 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:43:41,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 1195 events. 161/1195 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6372 event pairs, 23 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 815. Up to 80 conditions per place. [2023-08-29 21:43:41,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 231 transitions, 522 flow [2023-08-29 21:43:41,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 231 transitions, 522 flow [2023-08-29 21:43:41,460 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:43:41,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 231 transitions, 522 flow [2023-08-29 21:43:41,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 231 transitions, 522 flow [2023-08-29 21:43:41,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 231 transitions, 522 flow [2023-08-29 21:43:41,553 INFO L130 PetriNetUnfolder]: 161/1195 cut-off events. [2023-08-29 21:43:41,553 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:43:41,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 1195 events. 161/1195 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6372 event pairs, 23 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 815. Up to 80 conditions per place. [2023-08-29 21:43:41,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 26600 [2023-08-29 21:43:44,748 INFO L134 LiptonReduction]: Checked pairs total: 48528 [2023-08-29 21:43:44,748 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-29 21:43:44,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:43:44,752 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;@408c44b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:44,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-29 21:43:44,754 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:43:44,754 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:44,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:44,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:44,754 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 21:43:44,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash 87341, now seen corresponding path program 1 times [2023-08-29 21:43:44,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:44,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551957006] [2023-08-29 21:43:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:44,774 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 21:43:44,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:44,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551957006] [2023-08-29 21:43:44,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551957006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:44,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:44,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:44,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195440578] [2023-08-29 21:43:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:44,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:44,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:44,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 433 [2023-08-29 21:43:44,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 84 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:44,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:44,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 433 [2023-08-29 21:43:44,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand