./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.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_06-cond_racing1.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 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --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 21:36:15,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:36:15,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:36:15,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:36:15,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:36:15,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:36:15,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:36:15,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:36:15,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:36:15,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:36:15,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:36:15,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:36:15,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:36:15,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:36:15,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:36:15,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:36:15,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:36:15,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:36:15,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:36:15,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:36:15,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:36:15,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:36:15,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:36:15,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:36:15,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:36:15,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:36:15,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:36:15,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:36:15,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:36:15,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:36:15,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:36:15,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:36:15,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:36:15,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:36:15,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:36:15,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:36:15,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:36:15,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:36:15,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:36:15,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:36:15,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:36:15,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:36:15,500 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:36:15,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:36:15,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:36:15,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:36:15,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:36:15,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:36:15,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:36:15,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:36:15,504 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:36:15,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:36:15,505 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:36:15,505 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:36:15,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:36:15,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:36:15,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:36:15,506 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:36:15,506 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:36:15,506 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:36:15,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:36:15,507 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:36:15,507 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:36:15,507 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:36:15,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:36:15,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:36:15,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:36:15,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:36:15,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:36:15,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:36:15,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:36:15,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:36:15,509 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:36:15,509 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:36:15,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:36:15,510 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:36:15,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:36:15,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:36:15,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:36:15,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:36:15,846 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:36:15,847 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:36:15,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-08-29 21:36:16,941 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:36:17,194 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:36:17,195 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-08-29 21:36:17,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c3d51da2/79b5343c37d741b788da12ddc2784f59/FLAG162800a04 [2023-08-29 21:36:17,220 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c3d51da2/79b5343c37d741b788da12ddc2784f59 [2023-08-29 21:36:17,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:36:17,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:36:17,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:36:17,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:36:17,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:36:17,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@251b6c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17, skipping insertion in model container [2023-08-29 21:36:17,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:36:17,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:36:17,647 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_06-cond_racing1.i[41322,41335] [2023-08-29 21:36:17,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:36:17,684 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:36:17,731 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_06-cond_racing1.i[41322,41335] [2023-08-29 21:36:17,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:36:17,837 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:36:17,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17 WrapperNode [2023-08-29 21:36:17,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:36:17,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:36:17,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:36:17,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:36:17,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,902 INFO L138 Inliner]: procedures = 270, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-08-29 21:36:17,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:36:17,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:36:17,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:36:17,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:36:17,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:36:17,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:36:17,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:36:17,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:36:17,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (1/1) ... [2023-08-29 21:36:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:36:17,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:17,994 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 21:36:18,022 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 21:36:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:36:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:36:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:36:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:36:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:36:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:36:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:36:18,039 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:36:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:36:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:36:18,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:36:18,040 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 21:36:18,223 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:36:18,224 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:36:18,489 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:36:18,495 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:36:18,495 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-29 21:36:18,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:36:18 BoogieIcfgContainer [2023-08-29 21:36:18,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:36:18,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:36:18,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:36:18,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:36:18,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:36:17" (1/3) ... [2023-08-29 21:36:18,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f17d38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:36:18, skipping insertion in model container [2023-08-29 21:36:18,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:36:17" (2/3) ... [2023-08-29 21:36:18,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f17d38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:36:18, skipping insertion in model container [2023-08-29 21:36:18,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:36:18" (3/3) ... [2023-08-29 21:36:18,505 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2023-08-29 21:36:18,519 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:36:18,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-29 21:36:18,520 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:36:18,600 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-29 21:36:18,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 127 transitions, 262 flow [2023-08-29 21:36:18,715 INFO L130 PetriNetUnfolder]: 23/176 cut-off events. [2023-08-29 21:36:18,715 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:18,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 176 events. 23/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 437 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-08-29 21:36:18,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 127 transitions, 262 flow [2023-08-29 21:36:18,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 127 transitions, 262 flow [2023-08-29 21:36:18,730 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:18,743 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 127 transitions, 262 flow [2023-08-29 21:36:18,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 127 transitions, 262 flow [2023-08-29 21:36:18,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 127 transitions, 262 flow [2023-08-29 21:36:18,801 INFO L130 PetriNetUnfolder]: 23/176 cut-off events. [2023-08-29 21:36:18,801 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:18,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 176 events. 23/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 437 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-08-29 21:36:18,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 3080 [2023-08-29 21:36:22,510 INFO L134 LiptonReduction]: Checked pairs total: 5656 [2023-08-29 21:36:22,517 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-29 21:36:22,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:22,539 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;@62d1627f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:22,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:22,542 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:36:22,542 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:22,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:22,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:22,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:22,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash 15738, now seen corresponding path program 1 times [2023-08-29 21:36:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:22,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770440847] [2023-08-29 21:36:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:22,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:22,812 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 21:36:22,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:22,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770440847] [2023-08-29 21:36:22,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770440847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:22,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:22,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:22,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429858870] [2023-08-29 21:36:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:22,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:22,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:22,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 242 [2023-08-29 21:36:22,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:22,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:22,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 242 [2023-08-29 21:36:22,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:22,970 INFO L130 PetriNetUnfolder]: 123/282 cut-off events. [2023-08-29 21:36:22,970 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:22,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 282 events. 123/282 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1132 event pairs, 96 based on Foata normal form. 15/222 useless extension candidates. Maximal degree in co-relation 518. Up to 237 conditions per place. [2023-08-29 21:36:22,973 INFO L137 encePairwiseOnDemand]: 229/242 looper letters, 32 selfloop transitions, 2 changer transitions 2/37 dead transitions. [2023-08-29 21:36:22,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 152 flow [2023-08-29 21:36:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-29 21:36:22,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041322314049587 [2023-08-29 21:36:22,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-29 21:36:22,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-29 21:36:22,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:22,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-29 21:36:22,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:22,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:22,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:22,999 INFO L175 Difference]: Start difference. First operand has 32 places, 39 transitions, 86 flow. Second operand 3 states and 366 transitions. [2023-08-29 21:36:23,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 152 flow [2023-08-29 21:36:23,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:23,003 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 64 flow [2023-08-29 21:36:23,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-29 21:36:23,007 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-29 21:36:23,008 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 64 flow [2023-08-29 21:36:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:23,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:23,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:36:23,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:23,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 15740, now seen corresponding path program 1 times [2023-08-29 21:36:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134216580] [2023-08-29 21:36:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:23,113 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 21:36:23,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134216580] [2023-08-29 21:36:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134216580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:23,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:23,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:23,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490608928] [2023-08-29 21:36:23,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:23,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:23,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:23,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:23,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 242 [2023-08-29 21:36:23,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:23,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 242 [2023-08-29 21:36:23,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:23,233 INFO L130 PetriNetUnfolder]: 113/247 cut-off events. [2023-08-29 21:36:23,234 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:23,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 247 events. 113/247 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1122 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 486. Up to 236 conditions per place. [2023-08-29 21:36:23,236 INFO L137 encePairwiseOnDemand]: 237/242 looper letters, 32 selfloop transitions, 2 changer transitions 1/36 dead transitions. [2023-08-29 21:36:23,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 152 flow [2023-08-29 21:36:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-29 21:36:23,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986225895316804 [2023-08-29 21:36:23,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-29 21:36:23,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-29 21:36:23,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:23,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-29 21:36:23,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 21:36:23,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,252 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 64 flow. Second operand 3 states and 362 transitions. [2023-08-29 21:36:23,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 152 flow [2023-08-29 21:36:23,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:23,255 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 70 flow [2023-08-29 21:36:23,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-29 21:36:23,256 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2023-08-29 21:36:23,256 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 70 flow [2023-08-29 21:36:23,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:23,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:36:23,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:36:23,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:23,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash 469228299, now seen corresponding path program 1 times [2023-08-29 21:36:23,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:23,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268991882] [2023-08-29 21:36:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:23,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:23,398 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 21:36:23,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:23,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268991882] [2023-08-29 21:36:23,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268991882] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:23,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618838385] [2023-08-29 21:36:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:23,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:23,402 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 21:36:23,428 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 21:36:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:36:23,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:23,550 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 21:36:23,632 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 21:36:23,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:23,690 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 21:36:23,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618838385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:23,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:23,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:36:23,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205860836] [2023-08-29 21:36:23,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:23,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:36:23,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:36:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:36:23,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 242 [2023-08-29 21:36:23,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 105.875) internal successors, (847), 8 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:23,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 242 [2023-08-29 21:36:23,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:23,914 INFO L130 PetriNetUnfolder]: 16/46 cut-off events. [2023-08-29 21:36:23,914 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-29 21:36:23,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 46 events. 16/46 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 7 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 45. Up to 34 conditions per place. [2023-08-29 21:36:23,915 INFO L137 encePairwiseOnDemand]: 237/242 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-29 21:36:23,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 22 transitions, 94 flow [2023-08-29 21:36:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:36:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:36:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-08-29 21:36:23,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-29 21:36:23,917 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-08-29 21:36:23,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-08-29 21:36:23,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:23,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-08-29 21:36:23,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,921 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 70 flow. Second operand 4 states and 440 transitions. [2023-08-29 21:36:23,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 22 transitions, 94 flow [2023-08-29 21:36:23,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:23,922 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-29 21:36:23,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-29 21:36:23,924 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -14 predicate places. [2023-08-29 21:36:23,924 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-29 21:36:23,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.875) internal successors, (847), 8 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:23,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:36:23,928 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:36:23,928 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:36:23,928 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:36:23,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:36:23,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:36:23,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:36:24,137 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 21:36:24,137 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-29 21:36:24,140 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:36:24,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 127 transitions, 262 flow [2023-08-29 21:36:24,163 INFO L130 PetriNetUnfolder]: 23/176 cut-off events. [2023-08-29 21:36:24,163 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 21:36:24,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 176 events. 23/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 437 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-08-29 21:36:24,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 127 transitions, 262 flow [2023-08-29 21:36:24,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 122 transitions, 249 flow [2023-08-29 21:36:24,166 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:24,166 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 122 transitions, 249 flow [2023-08-29 21:36:24,167 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 122 transitions, 249 flow [2023-08-29 21:36:24,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 249 flow [2023-08-29 21:36:24,185 INFO L130 PetriNetUnfolder]: 22/171 cut-off events. [2023-08-29 21:36:24,185 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:24,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 171 events. 22/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 425 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-08-29 21:36:24,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 3080 [2023-08-29 21:36:27,322 INFO L134 LiptonReduction]: Checked pairs total: 5042 [2023-08-29 21:36:27,323 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-29 21:36:27,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:36:27,325 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;@62d1627f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:27,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:36:27,329 INFO L130 PetriNetUnfolder]: 4/32 cut-off events. [2023-08-29 21:36:27,329 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:27,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:27,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:36:27,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:36:27,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash 676212041, now seen corresponding path program 1 times [2023-08-29 21:36:27,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:27,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481679425] [2023-08-29 21:36:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:27,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:27,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:36:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:27,382 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:36:27,383 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:36:27,383 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:36:27,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:36:27,383 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:36:27,384 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:36:27,385 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:36:27,385 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:36:27,407 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 21:36:27,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:27,439 INFO L130 PetriNetUnfolder]: 40/284 cut-off events. [2023-08-29 21:36:27,439 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:27,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 284 events. 40/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 870 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 178. Up to 9 conditions per place. [2023-08-29 21:36:27,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:27,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:27,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:27,444 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:27,444 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:27,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:27,472 INFO L130 PetriNetUnfolder]: 40/284 cut-off events. [2023-08-29 21:36:27,472 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:27,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 284 events. 40/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 870 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 178. Up to 9 conditions per place. [2023-08-29 21:36:27,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 8344 [2023-08-29 21:36:30,791 INFO L134 LiptonReduction]: Checked pairs total: 21062 [2023-08-29 21:36:30,791 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-29 21:36:30,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:30,794 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;@62d1627f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:30,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:30,795 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:36:30,796 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:30,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:30,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:30,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:30,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:30,797 INFO L85 PathProgramCache]: Analyzing trace with hash 29344, now seen corresponding path program 1 times [2023-08-29 21:36:30,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:30,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780466134] [2023-08-29 21:36:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:30,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:30,871 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 21:36:30,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780466134] [2023-08-29 21:36:30,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780466134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:30,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:30,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:30,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004844513] [2023-08-29 21:36:30,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:30,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:30,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 283 [2023-08-29 21:36:30,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:30,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:30,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 283 [2023-08-29 21:36:30,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:31,261 INFO L130 PetriNetUnfolder]: 2050/3659 cut-off events. [2023-08-29 21:36:31,262 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-29 21:36:31,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7032 conditions, 3659 events. 2050/3659 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 23295 event pairs, 1628 based on Foata normal form. 395/3318 useless extension candidates. Maximal degree in co-relation 3658. Up to 3311 conditions per place. [2023-08-29 21:36:31,280 INFO L137 encePairwiseOnDemand]: 264/283 looper letters, 43 selfloop transitions, 2 changer transitions 2/57 dead transitions. [2023-08-29 21:36:31,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 224 flow [2023-08-29 21:36:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-29 21:36:31,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406360424028268 [2023-08-29 21:36:31,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-29 21:36:31,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-29 21:36:31,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:31,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-29 21:36:31,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:31,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:31,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:31,287 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 459 transitions. [2023-08-29 21:36:31,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 224 flow [2023-08-29 21:36:31,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:31,291 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 122 flow [2023-08-29 21:36:31,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=114, 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=122, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-08-29 21:36:31,295 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-29 21:36:31,295 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 122 flow [2023-08-29 21:36:31,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:31,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:31,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:31,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:36:31,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:31,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:31,297 INFO L85 PathProgramCache]: Analyzing trace with hash 29345, now seen corresponding path program 1 times [2023-08-29 21:36:31,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:31,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252116389] [2023-08-29 21:36:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:31,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:31,338 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 21:36:31,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:31,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252116389] [2023-08-29 21:36:31,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252116389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:31,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:31,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:31,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889885144] [2023-08-29 21:36:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:31,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:31,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:31,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 283 [2023-08-29 21:36:31,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:31,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:31,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 283 [2023-08-29 21:36:31,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:31,622 INFO L130 PetriNetUnfolder]: 1686/3002 cut-off events. [2023-08-29 21:36:31,623 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-08-29 21:36:31,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6062 conditions, 3002 events. 1686/3002 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18445 event pairs, 1484 based on Foata normal form. 0/2565 useless extension candidates. Maximal degree in co-relation 6001. Up to 2521 conditions per place. [2023-08-29 21:36:31,637 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 47 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-29 21:36:31,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 244 flow [2023-08-29 21:36:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:31,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-29 21:36:31,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076560659599529 [2023-08-29 21:36:31,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-29 21:36:31,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-29 21:36:31,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:31,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-29 21:36:31,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:31,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:31,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:31,646 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 122 flow. Second operand 3 states and 431 transitions. [2023-08-29 21:36:31,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 244 flow [2023-08-29 21:36:31,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 59 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:31,651 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 118 flow [2023-08-29 21:36:31,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-29 21:36:31,654 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-08-29 21:36:31,654 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 118 flow [2023-08-29 21:36:31,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:31,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:31,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:36:31,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:36:31,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:31,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1355098778, now seen corresponding path program 1 times [2023-08-29 21:36:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:31,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808639904] [2023-08-29 21:36:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:31,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:31,769 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 21:36:31,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:31,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808639904] [2023-08-29 21:36:31,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808639904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:31,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307456951] [2023-08-29 21:36:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:31,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:31,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:31,777 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 21:36:31,817 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 21:36:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:31,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:36:31,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:31,890 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 21:36:31,932 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 21:36:31,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:31,972 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 21:36:31,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307456951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:31,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:31,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:36:31,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487788280] [2023-08-29 21:36:31,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:31,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:36:31,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:31,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:36:31,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:36:32,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 283 [2023-08-29 21:36:32,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 128.71428571428572) internal successors, (901), 7 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:32,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 283 [2023-08-29 21:36:32,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:32,323 INFO L130 PetriNetUnfolder]: 1520/2498 cut-off events. [2023-08-29 21:36:32,323 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-08-29 21:36:32,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5263 conditions, 2498 events. 1520/2498 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15024 event pairs, 41 based on Foata normal form. 7/2297 useless extension candidates. Maximal degree in co-relation 4765. Up to 2091 conditions per place. [2023-08-29 21:36:32,335 INFO L137 encePairwiseOnDemand]: 277/283 looper letters, 65 selfloop transitions, 4 changer transitions 1/80 dead transitions. [2023-08-29 21:36:32,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 80 transitions, 326 flow [2023-08-29 21:36:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:36:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:36:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 709 transitions. [2023-08-29 21:36:32,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010600706713781 [2023-08-29 21:36:32,338 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 709 transitions. [2023-08-29 21:36:32,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 709 transitions. [2023-08-29 21:36:32,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:32,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 709 transitions. [2023-08-29 21:36:32,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,343 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,344 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 118 flow. Second operand 5 states and 709 transitions. [2023-08-29 21:36:32,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 80 transitions, 326 flow [2023-08-29 21:36:32,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 80 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:32,348 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 124 flow [2023-08-29 21:36:32,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-08-29 21:36:32,348 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-29 21:36:32,349 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 124 flow [2023-08-29 21:36:32,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.71428571428572) internal successors, (901), 7 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:32,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:32,357 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 21:36:32,554 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,SelfDestructingSolverStorable6 [2023-08-29 21:36:32,555 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:32,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:32,556 INFO L85 PathProgramCache]: Analyzing trace with hash 550499097, now seen corresponding path program 1 times [2023-08-29 21:36:32,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:32,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387641863] [2023-08-29 21:36:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:32,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:32,658 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 21:36:32,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:32,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387641863] [2023-08-29 21:36:32,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387641863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:32,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:32,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:36:32,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635533220] [2023-08-29 21:36:32,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:32,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:36:32,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:32,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:36:32,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:36:32,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 283 [2023-08-29 21:36:32,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:32,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 283 [2023-08-29 21:36:32,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:32,921 INFO L130 PetriNetUnfolder]: 1300/2246 cut-off events. [2023-08-29 21:36:32,921 INFO L131 PetriNetUnfolder]: For 439/439 co-relation queries the response was YES. [2023-08-29 21:36:32,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4862 conditions, 2246 events. 1300/2246 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12741 event pairs, 988 based on Foata normal form. 63/2125 useless extension candidates. Maximal degree in co-relation 2488. Up to 1631 conditions per place. [2023-08-29 21:36:32,932 INFO L137 encePairwiseOnDemand]: 277/283 looper letters, 61 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2023-08-29 21:36:32,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 325 flow [2023-08-29 21:36:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:36:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:36:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2023-08-29 21:36:32,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114840989399293 [2023-08-29 21:36:32,935 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 579 transitions. [2023-08-29 21:36:32,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 579 transitions. [2023-08-29 21:36:32,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:32,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 579 transitions. [2023-08-29 21:36:32,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,940 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,941 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 124 flow. Second operand 4 states and 579 transitions. [2023-08-29 21:36:32,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 325 flow [2023-08-29 21:36:32,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 317 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:32,944 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 135 flow [2023-08-29 21:36:32,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-08-29 21:36:32,946 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-29 21:36:32,946 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 135 flow [2023-08-29 21:36:32,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:32,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:32,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:32,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:36:32,947 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:32,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash 550498029, now seen corresponding path program 1 times [2023-08-29 21:36:32,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:32,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515610284] [2023-08-29 21:36:32,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:32,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:33,001 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 21:36:33,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:33,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515610284] [2023-08-29 21:36:33,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515610284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:33,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:33,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:33,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658245197] [2023-08-29 21:36:33,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:33,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:33,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:33,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:33,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:33,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 283 [2023-08-29 21:36:33,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:33,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 283 [2023-08-29 21:36:33,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:33,237 INFO L130 PetriNetUnfolder]: 1672/2854 cut-off events. [2023-08-29 21:36:33,237 INFO L131 PetriNetUnfolder]: For 858/858 co-relation queries the response was YES. [2023-08-29 21:36:33,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6242 conditions, 2854 events. 1672/2854 cut-off events. For 858/858 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15870 event pairs, 570 based on Foata normal form. 0/2694 useless extension candidates. Maximal degree in co-relation 4520. Up to 2451 conditions per place. [2023-08-29 21:36:33,281 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 52 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-08-29 21:36:33,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 305 flow [2023-08-29 21:36:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-29 21:36:33,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217903415783275 [2023-08-29 21:36:33,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-29 21:36:33,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-29 21:36:33,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:33,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-29 21:36:33,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,287 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 135 flow. Second operand 3 states and 443 transitions. [2023-08-29 21:36:33,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 305 flow [2023-08-29 21:36:33,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:36:33,293 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 152 flow [2023-08-29 21:36:33,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-29 21:36:33,294 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-08-29 21:36:33,294 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 152 flow [2023-08-29 21:36:33,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:33,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:33,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:36:33,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:33,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1066262105, now seen corresponding path program 1 times [2023-08-29 21:36:33,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:33,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961445988] [2023-08-29 21:36:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:33,367 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 21:36:33,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:33,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961445988] [2023-08-29 21:36:33,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961445988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:33,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618760452] [2023-08-29 21:36:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:33,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:33,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:33,369 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 21:36:33,372 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 21:36:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:33,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:36:33,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:33,462 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 21:36:33,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:33,491 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 21:36:33,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618760452] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:33,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:33,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:36:33,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314238902] [2023-08-29 21:36:33,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:33,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:36:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:33,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:36:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:36:33,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 283 [2023-08-29 21:36:33,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 152 flow. Second operand has 9 states, 9 states have (on average 132.88888888888889) internal successors, (1196), 9 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:33,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 283 [2023-08-29 21:36:33,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:33,609 INFO L130 PetriNetUnfolder]: 301/578 cut-off events. [2023-08-29 21:36:33,609 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2023-08-29 21:36:33,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1255 conditions, 578 events. 301/578 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2670 event pairs, 75 based on Foata normal form. 69/646 useless extension candidates. Maximal degree in co-relation 1246. Up to 370 conditions per place. [2023-08-29 21:36:33,611 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-29 21:36:33,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 230 flow [2023-08-29 21:36:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:36:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:36:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 694 transitions. [2023-08-29 21:36:33,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49045936395759715 [2023-08-29 21:36:33,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 694 transitions. [2023-08-29 21:36:33,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 694 transitions. [2023-08-29 21:36:33,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:33,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 694 transitions. [2023-08-29 21:36:33,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,620 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,620 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 152 flow. Second operand 5 states and 694 transitions. [2023-08-29 21:36:33,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 230 flow [2023-08-29 21:36:33,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:33,622 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-29 21:36:33,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=5, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-29 21:36:33,623 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2023-08-29 21:36:33,623 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-29 21:36:33,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.88888888888889) internal successors, (1196), 9 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:33,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:36:33,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:36:33,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:36:33,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:36:33,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:36:33,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:36:33,633 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 21:36:33,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:33,831 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-29 21:36:33,831 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:36:33,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:33,856 INFO L130 PetriNetUnfolder]: 40/284 cut-off events. [2023-08-29 21:36:33,856 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:33,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 284 events. 40/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 870 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 178. Up to 9 conditions per place. [2023-08-29 21:36:33,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:33,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:33,862 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:33,862 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:33,862 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:33,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 157 transitions, 332 flow [2023-08-29 21:36:33,881 INFO L130 PetriNetUnfolder]: 40/284 cut-off events. [2023-08-29 21:36:33,881 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 21:36:33,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 284 events. 40/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 870 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 178. Up to 9 conditions per place. [2023-08-29 21:36:33,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 8344 [2023-08-29 21:36:37,074 INFO L134 LiptonReduction]: Checked pairs total: 19383 [2023-08-29 21:36:37,075 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-29 21:36:37,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:36:37,077 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;@62d1627f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:37,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:36:37,082 INFO L130 PetriNetUnfolder]: 15/76 cut-off events. [2023-08-29 21:36:37,082 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 21:36:37,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:37,082 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:36:37,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:36:37,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash -186182805, now seen corresponding path program 1 times [2023-08-29 21:36:37,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:37,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477344586] [2023-08-29 21:36:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:37,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:37,098 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:36:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:37,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:36:37,110 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:36:37,110 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:36:37,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:36:37,111 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:36:37,111 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:36:37,112 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:36:37,112 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:36:37,126 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 21:36:37,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:37,158 INFO L130 PetriNetUnfolder]: 62/433 cut-off events. [2023-08-29 21:36:37,158 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:37,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 433 events. 62/433 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1507 event pairs, 1 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2023-08-29 21:36:37,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:37,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:37,164 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:37,164 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:37,165 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:37,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:37,196 INFO L130 PetriNetUnfolder]: 62/433 cut-off events. [2023-08-29 21:36:37,196 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:37,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 433 events. 62/433 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1507 event pairs, 1 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2023-08-29 21:36:37,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 15120 [2023-08-29 21:36:40,363 INFO L134 LiptonReduction]: Checked pairs total: 36722 [2023-08-29 21:36:40,363 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-29 21:36:40,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:40,365 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;@62d1627f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:40,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:40,366 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:36:40,366 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:40,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:40,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:40,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:40,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:40,367 INFO L85 PathProgramCache]: Analyzing trace with hash 44719, now seen corresponding path program 1 times [2023-08-29 21:36:40,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:40,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205229013] [2023-08-29 21:36:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:40,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:40,390 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 21:36:40,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:40,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205229013] [2023-08-29 21:36:40,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205229013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:40,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:40,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:40,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725495697] [2023-08-29 21:36:40,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:40,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:40,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:40,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:40,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:40,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 328 [2023-08-29 21:36:40,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:40,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:40,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 328 [2023-08-29 21:36:40,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:42,789 INFO L130 PetriNetUnfolder]: 20492/31155 cut-off events. [2023-08-29 21:36:42,789 INFO L131 PetriNetUnfolder]: For 719/719 co-relation queries the response was YES. [2023-08-29 21:36:42,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60723 conditions, 31155 events. 20492/31155 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 230530 event pairs, 16947 based on Foata normal form. 7123/33476 useless extension candidates. Maximal degree in co-relation 11896. Up to 24786 conditions per place. [2023-08-29 21:36:42,970 INFO L137 encePairwiseOnDemand]: 303/328 looper letters, 60 selfloop transitions, 2 changer transitions 2/79 dead transitions. [2023-08-29 21:36:42,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 314 flow [2023-08-29 21:36:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-29 21:36:42,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589430894308943 [2023-08-29 21:36:42,972 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-29 21:36:42,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-29 21:36:42,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:42,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-29 21:36:42,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:42,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:42,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:42,977 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 192 flow. Second operand 3 states and 550 transitions. [2023-08-29 21:36:42,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 314 flow [2023-08-29 21:36:42,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:36:42,979 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 142 flow [2023-08-29 21:36:42,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-29 21:36:42,981 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-08-29 21:36:42,981 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 142 flow [2023-08-29 21:36:42,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:42,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:42,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:42,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:36:42,982 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:42,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:42,985 INFO L85 PathProgramCache]: Analyzing trace with hash 44718, now seen corresponding path program 1 times [2023-08-29 21:36:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:42,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190406845] [2023-08-29 21:36:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:43,110 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 21:36:43,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:43,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190406845] [2023-08-29 21:36:43,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190406845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:43,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:43,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:43,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095418703] [2023-08-29 21:36:43,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:43,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:43,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:43,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 328 [2023-08-29 21:36:43,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 142 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 21:36:43,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:43,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 328 [2023-08-29 21:36:43,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:45,189 INFO L130 PetriNetUnfolder]: 19018/29055 cut-off events. [2023-08-29 21:36:45,189 INFO L131 PetriNetUnfolder]: For 1145/1145 co-relation queries the response was YES. [2023-08-29 21:36:45,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57090 conditions, 29055 events. 19018/29055 cut-off events. For 1145/1145 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 212397 event pairs, 16283 based on Foata normal form. 0/25748 useless extension candidates. Maximal degree in co-relation 52085. Up to 26881 conditions per place. [2023-08-29 21:36:45,320 INFO L137 encePairwiseOnDemand]: 323/328 looper letters, 48 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-29 21:36:45,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 258 flow [2023-08-29 21:36:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-29 21:36:45,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172764227642277 [2023-08-29 21:36:45,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-29 21:36:45,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-29 21:36:45,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:45,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-29 21:36:45,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:45,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:45,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:45,326 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 142 flow. Second operand 3 states and 509 transitions. [2023-08-29 21:36:45,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 258 flow [2023-08-29 21:36:45,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 252 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:45,361 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 152 flow [2023-08-29 21:36:45,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=152, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-08-29 21:36:45,362 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2023-08-29 21:36:45,362 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 152 flow [2023-08-29 21:36:45,363 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 21:36:45,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:45,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:36:45,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:36:45,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:45,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1612301189, now seen corresponding path program 1 times [2023-08-29 21:36:45,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:45,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344833428] [2023-08-29 21:36:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:45,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:45,452 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 21:36:45,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:45,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344833428] [2023-08-29 21:36:45,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344833428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:45,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680143031] [2023-08-29 21:36:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:45,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:45,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:45,454 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 21:36:45,457 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 21:36:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:36:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:45,531 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 21:36:45,558 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 21:36:45,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:45,591 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 21:36:45,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680143031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:45,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:45,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:36:45,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726909733] [2023-08-29 21:36:45,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:45,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:36:45,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:45,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:36:45,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:36:45,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 328 [2023-08-29 21:36:45,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:45,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:45,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 328 [2023-08-29 21:36:45,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:47,150 INFO L130 PetriNetUnfolder]: 18108/26997 cut-off events. [2023-08-29 21:36:47,150 INFO L131 PetriNetUnfolder]: For 1403/1403 co-relation queries the response was YES. [2023-08-29 21:36:47,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54668 conditions, 26997 events. 18108/26997 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 190074 event pairs, 4377 based on Foata normal form. 7/23835 useless extension candidates. Maximal degree in co-relation 8148. Up to 20037 conditions per place. [2023-08-29 21:36:47,292 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 113 selfloop transitions, 6 changer transitions 1/135 dead transitions. [2023-08-29 21:36:47,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 135 transitions, 556 flow [2023-08-29 21:36:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:36:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:36:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1019 transitions. [2023-08-29 21:36:47,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177845528455285 [2023-08-29 21:36:47,295 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1019 transitions. [2023-08-29 21:36:47,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1019 transitions. [2023-08-29 21:36:47,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:47,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1019 transitions. [2023-08-29 21:36:47,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.83333333333334) internal successors, (1019), 6 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,302 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,303 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 152 flow. Second operand 6 states and 1019 transitions. [2023-08-29 21:36:47,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 135 transitions, 556 flow [2023-08-29 21:36:47,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 135 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:36:47,306 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 170 flow [2023-08-29 21:36:47,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-29 21:36:47,307 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2023-08-29 21:36:47,307 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 170 flow [2023-08-29 21:36:47,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.71428571428572) internal successors, (1055), 7 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:47,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:47,320 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 21:36:47,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:47,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:47,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:47,513 INFO L85 PathProgramCache]: Analyzing trace with hash -870024168, now seen corresponding path program 1 times [2023-08-29 21:36:47,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:47,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630148953] [2023-08-29 21:36:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:47,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:47,581 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 21:36:47,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:47,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630148953] [2023-08-29 21:36:47,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630148953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:47,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:47,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:36:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804327155] [2023-08-29 21:36:47,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:47,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:36:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:36:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:36:47,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 328 [2023-08-29 21:36:47,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:47,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:47,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 328 [2023-08-29 21:36:47,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:49,197 INFO L130 PetriNetUnfolder]: 15639/23479 cut-off events. [2023-08-29 21:36:49,197 INFO L131 PetriNetUnfolder]: For 3565/3565 co-relation queries the response was YES. [2023-08-29 21:36:49,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49529 conditions, 23479 events. 15639/23479 cut-off events. For 3565/3565 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 163527 event pairs, 11935 based on Foata normal form. 504/22206 useless extension candidates. Maximal degree in co-relation 9612. Up to 17192 conditions per place. [2023-08-29 21:36:49,281 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 83 selfloop transitions, 6 changer transitions 0/104 dead transitions. [2023-08-29 21:36:49,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 104 transitions, 446 flow [2023-08-29 21:36:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:36:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:36:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 688 transitions. [2023-08-29 21:36:49,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2023-08-29 21:36:49,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 688 transitions. [2023-08-29 21:36:49,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 688 transitions. [2023-08-29 21:36:49,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:49,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 688 transitions. [2023-08-29 21:36:49,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:49,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:49,287 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:49,288 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 170 flow. Second operand 4 states and 688 transitions. [2023-08-29 21:36:49,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 104 transitions, 446 flow [2023-08-29 21:36:49,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 439 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 21:36:49,293 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 184 flow [2023-08-29 21:36:49,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-08-29 21:36:49,294 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2023-08-29 21:36:49,294 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 184 flow [2023-08-29 21:36:49,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:49,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:49,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:49,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 21:36:49,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:49,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:49,295 INFO L85 PathProgramCache]: Analyzing trace with hash -870024487, now seen corresponding path program 1 times [2023-08-29 21:36:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:49,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303349014] [2023-08-29 21:36:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:49,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:49,335 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 21:36:49,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:49,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303349014] [2023-08-29 21:36:49,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303349014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:49,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:49,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:49,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69757333] [2023-08-29 21:36:49,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:49,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:49,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:49,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 328 [2023-08-29 21:36:49,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 184 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 21:36:49,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:49,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 328 [2023-08-29 21:36:49,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:51,066 INFO L130 PetriNetUnfolder]: 25368/37544 cut-off events. [2023-08-29 21:36:51,067 INFO L131 PetriNetUnfolder]: For 10746/10746 co-relation queries the response was YES. [2023-08-29 21:36:51,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81478 conditions, 37544 events. 25368/37544 cut-off events. For 10746/10746 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 254280 event pairs, 10711 based on Foata normal form. 0/35877 useless extension candidates. Maximal degree in co-relation 56972. Up to 34656 conditions per place. [2023-08-29 21:36:51,285 INFO L137 encePairwiseOnDemand]: 323/328 looper letters, 68 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-29 21:36:51,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 410 flow [2023-08-29 21:36:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:36:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:36:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-29 21:36:51,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254065040650406 [2023-08-29 21:36:51,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-29 21:36:51,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-29 21:36:51,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:51,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-29 21:36:51,290 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 21:36:51,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:51,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:51,292 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 184 flow. Second operand 3 states and 517 transitions. [2023-08-29 21:36:51,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 410 flow [2023-08-29 21:36:51,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:36:51,355 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 207 flow [2023-08-29 21:36:51,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2023-08-29 21:36:51,355 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 6 predicate places. [2023-08-29 21:36:51,355 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 207 flow [2023-08-29 21:36:51,356 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 21:36:51,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:51,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:36:51,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:36:51,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:51,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1270641476, now seen corresponding path program 1 times [2023-08-29 21:36:51,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:51,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192856522] [2023-08-29 21:36:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:51,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:51,403 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 21:36:51,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:51,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192856522] [2023-08-29 21:36:51,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192856522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:36:51,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217761086] [2023-08-29 21:36:51,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:51,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:36:51,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:36:51,406 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 21:36:51,411 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 21:36:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:51,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:36:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:36:51,515 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 21:36:51,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:36:51,545 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 21:36:51,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217761086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:36:51,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:36:51,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:36:51,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359856234] [2023-08-29 21:36:51,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:36:51,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:36:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:51,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:36:51,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:36:51,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 328 [2023-08-29 21:36:51,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 207 flow. Second operand has 9 states, 9 states have (on average 154.88888888888889) internal successors, (1394), 9 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:51,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:51,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 328 [2023-08-29 21:36:51,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:36:52,066 INFO L130 PetriNetUnfolder]: 3659/5992 cut-off events. [2023-08-29 21:36:52,066 INFO L131 PetriNetUnfolder]: For 3369/3369 co-relation queries the response was YES. [2023-08-29 21:36:52,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13175 conditions, 5992 events. 3659/5992 cut-off events. For 3369/3369 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 38122 event pairs, 794 based on Foata normal form. 564/6445 useless extension candidates. Maximal degree in co-relation 13165. Up to 3498 conditions per place. [2023-08-29 21:36:52,084 INFO L137 encePairwiseOnDemand]: 324/328 looper letters, 0 selfloop transitions, 0 changer transitions 90/90 dead transitions. [2023-08-29 21:36:52,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 384 flow [2023-08-29 21:36:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:36:52,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:36:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 987 transitions. [2023-08-29 21:36:52,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015243902439024 [2023-08-29 21:36:52,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 987 transitions. [2023-08-29 21:36:52,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 987 transitions. [2023-08-29 21:36:52,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:36:52,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 987 transitions. [2023-08-29 21:36:52,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.5) internal successors, (987), 6 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:52,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:52,092 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:52,092 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 207 flow. Second operand 6 states and 987 transitions. [2023-08-29 21:36:52,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 384 flow [2023-08-29 21:36:52,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 90 transitions, 370 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 21:36:52,094 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-08-29 21:36:52,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-08-29 21:36:52,095 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -5 predicate places. [2023-08-29 21:36:52,095 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-08-29 21:36:52,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 154.88888888888889) internal successors, (1394), 9 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:36:52,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:36:52,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:36:52,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:36:52,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:36:52,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:36:52,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:36:52,104 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 21:36:52,302 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,SelfDestructingSolverStorable16 [2023-08-29 21:36:52,302 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-29 21:36:52,303 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:36:52,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:52,341 INFO L130 PetriNetUnfolder]: 62/433 cut-off events. [2023-08-29 21:36:52,341 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:52,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 433 events. 62/433 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1507 event pairs, 1 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2023-08-29 21:36:52,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:52,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:52,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:52,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:52,347 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:52,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 187 transitions, 404 flow [2023-08-29 21:36:52,381 INFO L130 PetriNetUnfolder]: 62/433 cut-off events. [2023-08-29 21:36:52,382 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-29 21:36:52,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 433 events. 62/433 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1507 event pairs, 1 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 292. Up to 16 conditions per place. [2023-08-29 21:36:52,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 15120 [2023-08-29 21:36:55,366 INFO L134 LiptonReduction]: Checked pairs total: 37320 [2023-08-29 21:36:55,366 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-29 21:36:55,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:36:55,370 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;@62d1627f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:55,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:36:55,379 INFO L130 PetriNetUnfolder]: 26/120 cut-off events. [2023-08-29 21:36:55,379 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-29 21:36:55,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:55,380 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:36:55,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:36:55,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1184360267, now seen corresponding path program 1 times [2023-08-29 21:36:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:55,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421058061] [2023-08-29 21:36:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:55,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:55,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:36:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:36:55,409 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:36:55,409 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:36:55,409 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:36:55,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 21:36:55,410 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:36:55,410 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:36:55,410 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:36:55,411 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:36:55,428 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 21:36:55,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 478 flow [2023-08-29 21:36:55,502 INFO L130 PetriNetUnfolder]: 96/666 cut-off events. [2023-08-29 21:36:55,502 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:36:55,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 666 events. 96/666 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2721 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 453. Up to 32 conditions per place. [2023-08-29 21:36:55,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 217 transitions, 478 flow [2023-08-29 21:36:55,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 217 transitions, 478 flow [2023-08-29 21:36:55,513 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:36:55,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 217 transitions, 478 flow [2023-08-29 21:36:55,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 217 transitions, 478 flow [2023-08-29 21:36:55,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 478 flow [2023-08-29 21:36:55,585 INFO L130 PetriNetUnfolder]: 96/666 cut-off events. [2023-08-29 21:36:55,586 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:36:55,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 666 events. 96/666 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2721 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 453. Up to 32 conditions per place. [2023-08-29 21:36:55,609 INFO L119 LiptonReduction]: Number of co-enabled transitions 23632 [2023-08-29 21:36:58,852 INFO L134 LiptonReduction]: Checked pairs total: 69816 [2023-08-29 21:36:58,853 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-29 21:36:58,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:36:58,854 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;@62d1627f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:36:58,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:36:58,856 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:36:58,856 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:36:58,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:36:58,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:36:58,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:36:58,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:36:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash 61950, now seen corresponding path program 1 times [2023-08-29 21:36:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:36:58,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771765919] [2023-08-29 21:36:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:36:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:36:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:36:58,894 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 21:36:58,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:36:58,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771765919] [2023-08-29 21:36:58,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771765919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:36:58,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:36:58,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:36:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429498104] [2023-08-29 21:36:58,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:36:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:36:58,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:36:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:36:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:36:58,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 370 [2023-08-29 21:36:58,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 102 transitions, 248 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 21:36:58,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:36:58,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 370 [2023-08-29 21:36:58,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:37:34,151 INFO L130 PetriNetUnfolder]: 400742/550875 cut-off events. [2023-08-29 21:37:34,151 INFO L131 PetriNetUnfolder]: For 14786/14786 co-relation queries the response was YES. [2023-08-29 21:37:35,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080372 conditions, 550875 events. 400742/550875 cut-off events. For 14786/14786 co-relation queries the response was YES. Maximal size of possible extension queue 11986. Compared 4426694 event pairs, 335960 based on Foata normal form. 96501/580890 useless extension candidates. Maximal degree in co-relation 93730. Up to 445990 conditions per place. [2023-08-29 21:37:36,819 INFO L137 encePairwiseOnDemand]: 338/370 looper letters, 84 selfloop transitions, 2 changer transitions 3/104 dead transitions. [2023-08-29 21:37:36,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 104 transitions, 428 flow [2023-08-29 21:37:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:37:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:37:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-29 21:37:36,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891891891891892 [2023-08-29 21:37:36,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-29 21:37:36,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-29 21:37:36,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:37:36,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-29 21:37:36,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:36,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:36,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:37:36,825 INFO L175 Difference]: Start difference. First operand has 79 places, 102 transitions, 248 flow. Second operand 3 states and 654 transitions. [2023-08-29 21:37:36,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 104 transitions, 428 flow [2023-08-29 21:37:36,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 104 transitions, 428 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:37:36,831 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 180 flow [2023-08-29 21:37:36,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2023-08-29 21:37:36,831 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2023-08-29 21:37:36,831 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 180 flow [2023-08-29 21:37:36,832 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 21:37:36,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:37:36,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:37:36,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:37:36,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:37:36,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:37:36,833 INFO L85 PathProgramCache]: Analyzing trace with hash 61951, now seen corresponding path program 1 times [2023-08-29 21:37:36,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:37:36,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756945007] [2023-08-29 21:37:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:37:36,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:37:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:37:36,873 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 21:37:36,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:37:36,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756945007] [2023-08-29 21:37:36,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756945007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:37:36,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:37:36,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:37:36,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865909927] [2023-08-29 21:37:36,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:37:36,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:37:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:37:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:37:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:37:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 370 [2023-08-29 21:37:36,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 180 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 21:37:36,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:37:36,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 370 [2023-08-29 21:37:36,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:05,973 INFO L130 PetriNetUnfolder]: 349614/484388 cut-off events. [2023-08-29 21:38:05,973 INFO L131 PetriNetUnfolder]: For 20104/20104 co-relation queries the response was YES. [2023-08-29 21:38:06,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955173 conditions, 484388 events. 349614/484388 cut-off events. For 20104/20104 co-relation queries the response was YES. Maximal size of possible extension queue 10656. Compared 3860768 event pairs, 252826 based on Foata normal form. 0/444354 useless extension candidates. Maximal degree in co-relation 868992. Up to 454474 conditions per place. [2023-08-29 21:38:08,494 INFO L137 encePairwiseOnDemand]: 365/370 looper letters, 63 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-29 21:38:08,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 330 flow [2023-08-29 21:38:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:38:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:38:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-08-29 21:38:08,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5315315315315315 [2023-08-29 21:38:08,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-08-29 21:38:08,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-08-29 21:38:08,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:08,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-08-29 21:38:08,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:08,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:08,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:08,498 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 180 flow. Second operand 3 states and 590 transitions. [2023-08-29 21:38:08,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 330 flow [2023-08-29 21:38:17,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 324 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 21:38:17,840 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 190 flow [2023-08-29 21:38:17,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2023-08-29 21:38:17,840 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2023-08-29 21:38:17,840 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 190 flow [2023-08-29 21:38:17,841 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 21:38:17,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:17,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:38:17,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 21:38:17,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:17,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1433015261, now seen corresponding path program 1 times [2023-08-29 21:38:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:17,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244430964] [2023-08-29 21:38:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:17,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:17,908 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 21:38:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:17,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244430964] [2023-08-29 21:38:17,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244430964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:38:17,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167040314] [2023-08-29 21:38:17,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:17,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:17,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:38:17,912 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 21:38:17,913 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 21:38:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:38:17,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:38:18,000 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 21:38:18,037 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 21:38:18,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:38:18,076 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 21:38:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167040314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:38:18,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:38:18,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:38:18,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738368915] [2023-08-29 21:38:18,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:38:18,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:38:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:18,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:38:18,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:38:18,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 370 [2023-08-29 21:38:18,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 190 flow. Second operand has 8 states, 8 states have (on average 171.875) internal successors, (1375), 8 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:18,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:18,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 370 [2023-08-29 21:38:18,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:43,808 INFO L130 PetriNetUnfolder]: 314386/416392 cut-off events. [2023-08-29 21:38:43,809 INFO L131 PetriNetUnfolder]: For 13529/13529 co-relation queries the response was YES. [2023-08-29 21:38:44,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849547 conditions, 416392 events. 314386/416392 cut-off events. For 13529/13529 co-relation queries the response was YES. Maximal size of possible extension queue 9153. Compared 3047632 event pairs, 5786 based on Foata normal form. 738/387463 useless extension candidates. Maximal degree in co-relation 756553. Up to 315686 conditions per place. [2023-08-29 21:38:46,034 INFO L137 encePairwiseOnDemand]: 363/370 looper letters, 163 selfloop transitions, 6 changer transitions 1/185 dead transitions. [2023-08-29 21:38:46,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 185 transitions, 760 flow [2023-08-29 21:38:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:38:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:38:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1370 transitions. [2023-08-29 21:38:46,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528957528957529 [2023-08-29 21:38:46,037 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1370 transitions. [2023-08-29 21:38:46,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1370 transitions. [2023-08-29 21:38:46,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:46,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1370 transitions. [2023-08-29 21:38:46,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 195.71428571428572) internal successors, (1370), 7 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:46,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:46,044 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:46,044 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 190 flow. Second operand 7 states and 1370 transitions. [2023-08-29 21:38:46,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 185 transitions, 760 flow [2023-08-29 21:38:46,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 185 transitions, 758 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:38:46,049 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 226 flow [2023-08-29 21:38:46,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2023-08-29 21:38:46,050 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 5 predicate places. [2023-08-29 21:38:46,050 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 226 flow [2023-08-29 21:38:46,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.875) internal successors, (1375), 8 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:46,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:46,051 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:38:46,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-29 21:38:46,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:46,258 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:46,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1088508095, now seen corresponding path program 1 times [2023-08-29 21:38:46,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:46,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067983394] [2023-08-29 21:38:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:46,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-29 21:38:46,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:46,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067983394] [2023-08-29 21:38:46,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067983394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:38:46,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021359528] [2023-08-29 21:38:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:46,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:46,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:38:46,356 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 21:38:46,357 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 21:38:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:46,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:38:46,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:38:46,491 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 21:38:46,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:38:46,553 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 21:38:46,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021359528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:38:46,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:38:46,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2023-08-29 21:38:46,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559775870] [2023-08-29 21:38:46,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:38:46,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 21:38:46,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:46,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 21:38:46,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2023-08-29 21:38:46,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 370 [2023-08-29 21:38:46,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 226 flow. Second operand has 16 states, 16 states have (on average 167.625) internal successors, (2682), 16 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:46,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:46,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 370 [2023-08-29 21:38:46,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:38:49,997 INFO L130 PetriNetUnfolder]: 41092/57994 cut-off events. [2023-08-29 21:38:49,997 INFO L131 PetriNetUnfolder]: For 49411/49411 co-relation queries the response was YES. [2023-08-29 21:38:50,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136365 conditions, 57994 events. 41092/57994 cut-off events. For 49411/49411 co-relation queries the response was YES. Maximal size of possible extension queue 1554. Compared 390473 event pairs, 70 based on Foata normal form. 5832/63823 useless extension candidates. Maximal degree in co-relation 18093. Up to 26487 conditions per place. [2023-08-29 21:38:50,151 INFO L137 encePairwiseOnDemand]: 366/370 looper letters, 0 selfloop transitions, 0 changer transitions 136/136 dead transitions. [2023-08-29 21:38:50,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 136 transitions, 574 flow [2023-08-29 21:38:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:38:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:38:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1279 transitions. [2023-08-29 21:38:50,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382239382239385 [2023-08-29 21:38:50,153 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1279 transitions. [2023-08-29 21:38:50,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1279 transitions. [2023-08-29 21:38:50,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:38:50,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1279 transitions. [2023-08-29 21:38:50,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.71428571428572) internal successors, (1279), 7 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:50,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:50,158 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 370.0) internal successors, (2960), 8 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:50,158 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 226 flow. Second operand 7 states and 1279 transitions. [2023-08-29 21:38:50,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 136 transitions, 574 flow [2023-08-29 21:38:50,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 136 transitions, 550 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-29 21:38:50,240 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-08-29 21:38:50,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-08-29 21:38:50,241 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -8 predicate places. [2023-08-29 21:38:50,241 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-08-29 21:38:50,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 167.625) internal successors, (2682), 16 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:50,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (5 of 6 remaining) [2023-08-29 21:38:50,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-29 21:38:50,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2023-08-29 21:38:50,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-29 21:38:50,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-29 21:38:50,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 6 remaining) [2023-08-29 21:38:50,246 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 21:38:50,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:38:50,442 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-29 21:38:50,443 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:38:50,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 478 flow [2023-08-29 21:38:50,483 INFO L130 PetriNetUnfolder]: 96/666 cut-off events. [2023-08-29 21:38:50,484 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:38:50,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 666 events. 96/666 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2721 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 453. Up to 32 conditions per place. [2023-08-29 21:38:50,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 217 transitions, 478 flow [2023-08-29 21:38:50,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 217 transitions, 478 flow [2023-08-29 21:38:50,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:38:50,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 217 transitions, 478 flow [2023-08-29 21:38:50,490 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 217 transitions, 478 flow [2023-08-29 21:38:50,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 217 transitions, 478 flow [2023-08-29 21:38:50,528 INFO L130 PetriNetUnfolder]: 96/666 cut-off events. [2023-08-29 21:38:50,528 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-29 21:38:50,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 666 events. 96/666 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2721 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 453. Up to 32 conditions per place. [2023-08-29 21:38:50,546 INFO L119 LiptonReduction]: Number of co-enabled transitions 23632 [2023-08-29 21:38:53,389 INFO L134 LiptonReduction]: Checked pairs total: 62545 [2023-08-29 21:38:53,390 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-29 21:38:53,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:38:53,391 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;@62d1627f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:38:53,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:38:53,401 INFO L130 PetriNetUnfolder]: 38/173 cut-off events. [2023-08-29 21:38:53,401 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-29 21:38:53,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:53,401 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-29 21:38:53,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:38:53,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:53,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1428575416, now seen corresponding path program 1 times [2023-08-29 21:38:53,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:53,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107176347] [2023-08-29 21:38:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:53,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:38:53,419 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:38:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:38:53,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:38:53,431 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:38:53,431 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:38:53,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 21:38:53,432 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:38:53,432 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:38:53,432 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:38:53,432 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-29 21:38:53,450 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-29 21:38:53,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 247 transitions, 554 flow [2023-08-29 21:38:53,562 INFO L130 PetriNetUnfolder]: 158/1071 cut-off events. [2023-08-29 21:38:53,563 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:38:53,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 1071 events. 158/1071 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5281 event pairs, 23 based on Foata normal form. 0/815 useless extension candidates. Maximal degree in co-relation 711. Up to 80 conditions per place. [2023-08-29 21:38:53,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 247 transitions, 554 flow [2023-08-29 21:38:53,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 247 transitions, 554 flow [2023-08-29 21:38:53,581 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:38:53,581 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 247 transitions, 554 flow [2023-08-29 21:38:53,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 247 transitions, 554 flow [2023-08-29 21:38:53,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 247 transitions, 554 flow [2023-08-29 21:38:53,783 INFO L130 PetriNetUnfolder]: 158/1071 cut-off events. [2023-08-29 21:38:53,783 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-29 21:38:53,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 1071 events. 158/1071 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5281 event pairs, 23 based on Foata normal form. 0/815 useless extension candidates. Maximal degree in co-relation 711. Up to 80 conditions per place. [2023-08-29 21:38:53,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 33880 [2023-08-29 21:38:56,880 INFO L134 LiptonReduction]: Checked pairs total: 104763 [2023-08-29 21:38:56,880 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-29 21:38:56,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:38:56,882 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;@62d1627f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:38:56,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-29 21:38:56,883 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 21:38:56,883 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:38:56,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:38:56,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:38:56,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 3 more)] === [2023-08-29 21:38:56,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:38:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash 81045, now seen corresponding path program 1 times [2023-08-29 21:38:56,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:38:56,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068926713] [2023-08-29 21:38:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:38:56,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:38:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:38:56,935 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 21:38:56,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:38:56,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068926713] [2023-08-29 21:38:56,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068926713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:38:56,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:38:56,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:38:56,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57702086] [2023-08-29 21:38:56,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:38:56,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:38:56,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:38:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:38:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:38:56,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 413 [2023-08-29 21:38:56,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 121 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:38:56,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:38:56,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 413 [2023-08-29 21:38:56,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand