./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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_27-funptr_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:10:34,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:10:34,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:10:34,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:10:34,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:10:34,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:10:34,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:10:34,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:10:34,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:10:34,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:10:34,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:10:34,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:10:34,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:10:34,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:10:34,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:10:34,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:10:34,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:10:34,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:10:34,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:10:34,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:10:34,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:10:34,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:10:34,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:10:34,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:10:34,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:10:34,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:10:34,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:10:34,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:10:34,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:10:34,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:10:34,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:10:34,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:10:34,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:10:34,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:10:34,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:10:34,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:10:34,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:10:34,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:10:34,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:10:34,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:10:34,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:10:34,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:10:34,368 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:10:34,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:10:34,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:10:34,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:10:34,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:10:34,370 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:10:34,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:10:34,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:10:34,371 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:10:34,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:10:34,372 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:10:34,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:10:34,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:10:34,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:10:34,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:10:34,372 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:10:34,372 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:10:34,372 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:10:34,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:10:34,373 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:10:34,373 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:10:34,373 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:10:34,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:10:34,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:10:34,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:10:34,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:10:34,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:10:34,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:10:34,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:10:34,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:10:34,374 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:10:34,374 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:10:34,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:10:34,375 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:10:34,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:10:34,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:10:34,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:10:34,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:10:34,635 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:10:34,636 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:10:34,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-30 04:10:35,679 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:10:35,919 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:10:35,919 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-30 04:10:35,954 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeee7823e/627df2e515c843e88dc6187918eb0b9f/FLAG1ae1f992c [2023-08-30 04:10:36,244 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeee7823e/627df2e515c843e88dc6187918eb0b9f [2023-08-30 04:10:36,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:10:36,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:10:36,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:10:36,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:10:36,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:10:36,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c138e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36, skipping insertion in model container [2023-08-30 04:10:36,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:10:36,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:10:36,657 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_27-funptr_racing.i[41323,41336] [2023-08-30 04:10:36,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:10:36,698 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:10:36,745 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_27-funptr_racing.i[41323,41336] [2023-08-30 04:10:36,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:10:36,805 WARN L667 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 04:10:36,810 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:10:36,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36 WrapperNode [2023-08-30 04:10:36,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:10:36,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:10:36,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:10:36,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:10:36,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,875 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2023-08-30 04:10:36,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:10:36,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:10:36,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:10:36,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:10:36,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,919 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:10:36,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:10:36,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:10:36,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:10:36,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (1/1) ... [2023-08-30 04:10:36,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:10:36,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:10:36,995 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) [2023-08-30 04:10:37,033 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 [2023-08-30 04:10:37,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:10:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:10:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:10:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:10:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:10:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:10:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:10:37,053 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:10:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:10:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:10:37,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:10:37,054 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:10:37,207 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:10:37,216 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:10:37,402 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:10:37,407 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:10:37,410 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-30 04:10:37,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:10:37 BoogieIcfgContainer [2023-08-30 04:10:37,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:10:37,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:10:37,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:10:37,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:10:37,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:10:36" (1/3) ... [2023-08-30 04:10:37,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d59ae01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:10:37, skipping insertion in model container [2023-08-30 04:10:37,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:10:36" (2/3) ... [2023-08-30 04:10:37,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d59ae01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:10:37, skipping insertion in model container [2023-08-30 04:10:37,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:10:37" (3/3) ... [2023-08-30 04:10:37,432 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-08-30 04:10:37,444 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:10:37,445 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 04:10:37,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:10:37,497 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:10:37,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 153 transitions, 314 flow [2023-08-30 04:10:37,599 INFO L130 PetriNetUnfolder]: 24/197 cut-off events. [2023-08-30 04:10:37,600 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:10:37,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 197 events. 24/197 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 567 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2023-08-30 04:10:37,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 153 transitions, 314 flow [2023-08-30 04:10:37,613 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 153 transitions, 314 flow [2023-08-30 04:10:37,616 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:10:37,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 153 transitions, 314 flow [2023-08-30 04:10:37,623 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 153 transitions, 314 flow [2023-08-30 04:10:37,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 153 transitions, 314 flow [2023-08-30 04:10:37,677 INFO L130 PetriNetUnfolder]: 24/197 cut-off events. [2023-08-30 04:10:37,677 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:10:37,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 197 events. 24/197 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 567 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2023-08-30 04:10:37,681 INFO L119 LiptonReduction]: Number of co-enabled transitions 6200 [2023-08-30 04:10:40,586 INFO L134 LiptonReduction]: Checked pairs total: 13820 [2023-08-30 04:10:40,587 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-30 04:10:40,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:10:40,603 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;@44ae3960, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:10:40,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:10:40,606 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-30 04:10:40,607 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:10:40,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:40,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:10:40,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:10:40,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:40,612 INFO L85 PathProgramCache]: Analyzing trace with hash 19169, now seen corresponding path program 1 times [2023-08-30 04:10:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:40,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423968859] [2023-08-30 04:10:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:40,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:40,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:40,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423968859] [2023-08-30 04:10:40,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423968859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:10:40,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:10:40,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:10:40,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041980812] [2023-08-30 04:10:40,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:10:40,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:10:40,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:40,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:10:40,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:10:40,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 274 [2023-08-30 04:10:40,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 60 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:40,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:40,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 274 [2023-08-30 04:10:40,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:41,054 INFO L130 PetriNetUnfolder]: 257/571 cut-off events. [2023-08-30 04:10:41,055 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:10:41,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 571 events. 257/571 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2877 event pairs, 208 based on Foata normal form. 32/475 useless extension candidates. Maximal degree in co-relation 1073. Up to 475 conditions per place. [2023-08-30 04:10:41,071 INFO L137 encePairwiseOnDemand]: 254/274 looper letters, 50 selfloop transitions, 2 changer transitions 1/59 dead transitions. [2023-08-30 04:10:41,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 232 flow [2023-08-30 04:10:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:10:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:10:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-30 04:10:41,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559610705596107 [2023-08-30 04:10:41,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-30 04:10:41,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-30 04:10:41,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:41,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-30 04:10:41,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,096 INFO L175 Difference]: Start difference. First operand has 46 places, 60 transitions, 128 flow. Second operand 3 states and 457 transitions. [2023-08-30 04:10:41,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 232 flow [2023-08-30 04:10:41,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:10:41,100 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 94 flow [2023-08-30 04:10:41,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 04:10:41,104 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-30 04:10:41,105 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 94 flow [2023-08-30 04:10:41,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:41,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:10:41,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:10:41,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:10:41,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:41,107 INFO L85 PathProgramCache]: Analyzing trace with hash 19170, now seen corresponding path program 1 times [2023-08-30 04:10:41,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:41,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075815255] [2023-08-30 04:10:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:41,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:41,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:41,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075815255] [2023-08-30 04:10:41,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075815255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:10:41,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:10:41,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:10:41,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336548469] [2023-08-30 04:10:41,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:10:41,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:10:41,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:10:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:10:41,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 274 [2023-08-30 04:10:41,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:41,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 274 [2023-08-30 04:10:41,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:41,371 INFO L130 PetriNetUnfolder]: 239/539 cut-off events. [2023-08-30 04:10:41,371 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:10:41,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 539 events. 239/539 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2868 event pairs, 0 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 1024. Up to 482 conditions per place. [2023-08-30 04:10:41,374 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-30 04:10:41,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 236 flow [2023-08-30 04:10:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:10:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:10:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-30 04:10:41,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340632603406326 [2023-08-30 04:10:41,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-30 04:10:41,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-30 04:10:41,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:41,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-30 04:10:41,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,380 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 94 flow. Second operand 3 states and 439 transitions. [2023-08-30 04:10:41,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 236 flow [2023-08-30 04:10:41,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:10:41,382 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 100 flow [2023-08-30 04:10:41,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 04:10:41,383 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-30 04:10:41,383 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 100 flow [2023-08-30 04:10:41,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:41,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:10:41,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:10:41,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:10:41,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash 571482005, now seen corresponding path program 1 times [2023-08-30 04:10:41,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:41,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3082428] [2023-08-30 04:10:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:41,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:41,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3082428] [2023-08-30 04:10:41,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3082428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:10:41,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719549466] [2023-08-30 04:10:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:41,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:10:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:10:41,482 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) [2023-08-30 04:10:41,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:10:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:41,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:10:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:10:41,682 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 [2023-08-30 04:10:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:41,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:10:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:41,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719549466] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:10:41,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:10:41,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:10:41,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302574642] [2023-08-30 04:10:41,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:10:41,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:10:41,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:10:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:10:41,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 274 [2023-08-30 04:10:41,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:41,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:41,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 274 [2023-08-30 04:10:41,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:42,006 INFO L130 PetriNetUnfolder]: 35/100 cut-off events. [2023-08-30 04:10:42,006 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 04:10:42,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 100 events. 35/100 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 291 event pairs, 15 based on Foata normal form. 17/114 useless extension candidates. Maximal degree in co-relation 214. Up to 68 conditions per place. [2023-08-30 04:10:42,007 INFO L137 encePairwiseOnDemand]: 270/274 looper letters, 37 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 04:10:42,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 177 flow [2023-08-30 04:10:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:10:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:10:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-30 04:10:42,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48996350364963503 [2023-08-30 04:10:42,010 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-30 04:10:42,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-30 04:10:42,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:42,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-30 04:10:42,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:42,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 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) [2023-08-30 04:10:42,016 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 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) [2023-08-30 04:10:42,016 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 100 flow. Second operand 4 states and 537 transitions. [2023-08-30 04:10:42,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 177 flow [2023-08-30 04:10:42,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 44 transitions, 171 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:10:42,017 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 61 flow [2023-08-30 04:10:42,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=61, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-30 04:10:42,018 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -15 predicate places. [2023-08-30 04:10:42,019 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 61 flow [2023-08-30 04:10:42,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:42,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:42,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:10:42,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:10:42,226 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 [2023-08-30 04:10:42,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:10:42,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash 536073356, now seen corresponding path program 1 times [2023-08-30 04:10:42,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:42,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665520338] [2023-08-30 04:10:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:42,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:10:42,264 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:10:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:10:42,284 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:10:42,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:10:42,285 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:10:42,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:10:42,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:10:42,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:10:42,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:10:42,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:10:42,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:10:42,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:10:42,289 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:10:42,291 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:10:42,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:10:42,313 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:10:42,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 217 transitions, 452 flow [2023-08-30 04:10:42,351 INFO L130 PetriNetUnfolder]: 45/334 cut-off events. [2023-08-30 04:10:42,351 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:10:42,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 334 events. 45/334 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1210 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 199. Up to 8 conditions per place. [2023-08-30 04:10:42,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 217 transitions, 452 flow [2023-08-30 04:10:42,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 217 transitions, 452 flow [2023-08-30 04:10:42,356 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:10:42,356 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 217 transitions, 452 flow [2023-08-30 04:10:42,357 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 217 transitions, 452 flow [2023-08-30 04:10:42,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 217 transitions, 452 flow [2023-08-30 04:10:42,389 INFO L130 PetriNetUnfolder]: 45/334 cut-off events. [2023-08-30 04:10:42,390 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:10:42,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 334 events. 45/334 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1210 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 199. Up to 8 conditions per place. [2023-08-30 04:10:42,412 INFO L119 LiptonReduction]: Number of co-enabled transitions 21452 [2023-08-30 04:10:45,474 INFO L134 LiptonReduction]: Checked pairs total: 65145 [2023-08-30 04:10:45,474 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-08-30 04:10:45,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:10:45,476 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;@44ae3960, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:10:45,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:10:45,477 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:10:45,478 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:10:45,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:45,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:10:45,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:10:45,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:45,478 INFO L85 PathProgramCache]: Analyzing trace with hash 32991, now seen corresponding path program 1 times [2023-08-30 04:10:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:45,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61510584] [2023-08-30 04:10:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:45,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:45,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:45,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61510584] [2023-08-30 04:10:45,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61510584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:10:45,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:10:45,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:10:45,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965310112] [2023-08-30 04:10:45,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:10:45,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:10:45,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:10:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:10:45,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 368 [2023-08-30 04:10:45,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 105 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:45,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:45,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 368 [2023-08-30 04:10:45,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:47,094 INFO L130 PetriNetUnfolder]: 11055/18506 cut-off events. [2023-08-30 04:10:47,094 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-30 04:10:47,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35596 conditions, 18506 events. 11055/18506 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 137202 event pairs, 9055 based on Foata normal form. 2150/17563 useless extension candidates. Maximal degree in co-relation 14210. Up to 14772 conditions per place. [2023-08-30 04:10:47,195 INFO L137 encePairwiseOnDemand]: 336/368 looper letters, 92 selfloop transitions, 2 changer transitions 1/112 dead transitions. [2023-08-30 04:10:47,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 432 flow [2023-08-30 04:10:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:10:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:10:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-08-30 04:10:47,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096014492753623 [2023-08-30 04:10:47,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-08-30 04:10:47,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-08-30 04:10:47,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:47,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-08-30 04:10:47,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:47,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:47,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:47,205 INFO L175 Difference]: Start difference. First operand has 79 places, 105 transitions, 228 flow. Second operand 3 states and 673 transitions. [2023-08-30 04:10:47,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 432 flow [2023-08-30 04:10:47,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:10:47,209 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 170 flow [2023-08-30 04:10:47,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-08-30 04:10:47,210 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -1 predicate places. [2023-08-30 04:10:47,211 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 170 flow [2023-08-30 04:10:47,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:47,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:47,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:10:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:10:47,212 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:10:47,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash 32990, now seen corresponding path program 1 times [2023-08-30 04:10:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:47,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318323442] [2023-08-30 04:10:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:47,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:47,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318323442] [2023-08-30 04:10:47,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318323442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:10:47,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:10:47,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:10:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103793801] [2023-08-30 04:10:47,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:10:47,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:10:47,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:10:47,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:10:47,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 368 [2023-08-30 04:10:47,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:47,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:47,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 368 [2023-08-30 04:10:47,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:48,619 INFO L130 PetriNetUnfolder]: 10333/17334 cut-off events. [2023-08-30 04:10:48,620 INFO L131 PetriNetUnfolder]: For 224/224 co-relation queries the response was YES. [2023-08-30 04:10:48,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33720 conditions, 17334 events. 10333/17334 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 128167 event pairs, 4607 based on Foata normal form. 0/15142 useless extension candidates. Maximal degree in co-relation 31111. Up to 15843 conditions per place. [2023-08-30 04:10:48,702 INFO L137 encePairwiseOnDemand]: 364/368 looper letters, 76 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-30 04:10:48,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 368 flow [2023-08-30 04:10:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:10:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:10:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 614 transitions. [2023-08-30 04:10:48,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561594202898551 [2023-08-30 04:10:48,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 614 transitions. [2023-08-30 04:10:48,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 614 transitions. [2023-08-30 04:10:48,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:48,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 614 transitions. [2023-08-30 04:10:48,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:48,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:48,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:48,712 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 170 flow. Second operand 3 states and 614 transitions. [2023-08-30 04:10:48,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 368 flow [2023-08-30 04:10:48,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:10:48,752 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 180 flow [2023-08-30 04:10:48,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2023-08-30 04:10:48,755 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -1 predicate places. [2023-08-30 04:10:48,755 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 180 flow [2023-08-30 04:10:48,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:48,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:48,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:10:48,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:10:48,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:10:48,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash 430010030, now seen corresponding path program 1 times [2023-08-30 04:10:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641550412] [2023-08-30 04:10:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:48,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:48,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:48,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641550412] [2023-08-30 04:10:48,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641550412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:10:48,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679446612] [2023-08-30 04:10:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:48,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:10:48,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:10:48,857 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) [2023-08-30 04:10:48,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:10:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:10:48,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:10:48,935 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 [2023-08-30 04:10:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:48,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:10:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:48,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679446612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:10:48,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:10:48,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:10:48,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211786336] [2023-08-30 04:10:48,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:10:48,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:10:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:10:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:10:49,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 368 [2023-08-30 04:10:49,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 180 flow. Second operand has 7 states, 7 states have (on average 176.71428571428572) internal successors, (1237), 7 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:49,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:49,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 368 [2023-08-30 04:10:49,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:50,116 INFO L130 PetriNetUnfolder]: 9478/15396 cut-off events. [2023-08-30 04:10:50,117 INFO L131 PetriNetUnfolder]: For 761/761 co-relation queries the response was YES. [2023-08-30 04:10:50,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31422 conditions, 15396 events. 9478/15396 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 111231 event pairs, 1 based on Foata normal form. 19/13781 useless extension candidates. Maximal degree in co-relation 2143. Up to 12613 conditions per place. [2023-08-30 04:10:50,203 INFO L137 encePairwiseOnDemand]: 363/368 looper letters, 148 selfloop transitions, 4 changer transitions 0/169 dead transitions. [2023-08-30 04:10:50,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 169 transitions, 670 flow [2023-08-30 04:10:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:10:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:10:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1030 transitions. [2023-08-30 04:10:50,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2023-08-30 04:10:50,207 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1030 transitions. [2023-08-30 04:10:50,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1030 transitions. [2023-08-30 04:10:50,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:50,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1030 transitions. [2023-08-30 04:10:50,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:50,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:50,214 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 368.0) internal successors, (2208), 6 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:50,215 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 180 flow. Second operand 5 states and 1030 transitions. [2023-08-30 04:10:50,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 169 transitions, 670 flow [2023-08-30 04:10:50,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 169 transitions, 668 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:10:50,219 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 186 flow [2023-08-30 04:10:50,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2023-08-30 04:10:50,220 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2023-08-30 04:10:50,220 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 186 flow [2023-08-30 04:10:50,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 176.71428571428572) internal successors, (1237), 7 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:50,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:50,221 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:10:50,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:10:50,427 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 [2023-08-30 04:10:50,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:10:50,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash -730483120, now seen corresponding path program 1 times [2023-08-30 04:10:50,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:50,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112349506] [2023-08-30 04:10:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:50,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:10:50,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:10:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:10:50,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:10:50,454 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:10:50,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:10:50,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:10:50,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:10:50,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:10:50,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:10:50,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:10:50,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:10:50,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:10:50,456 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:10:50,457 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:10:50,457 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:10:50,483 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:10:50,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 281 transitions, 592 flow [2023-08-30 04:10:50,691 INFO L130 PetriNetUnfolder]: 71/512 cut-off events. [2023-08-30 04:10:50,691 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:10:50,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 512 events. 71/512 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2081 event pairs, 1 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 342. Up to 16 conditions per place. [2023-08-30 04:10:50,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 281 transitions, 592 flow [2023-08-30 04:10:50,699 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 281 transitions, 592 flow [2023-08-30 04:10:50,699 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:10:50,699 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 281 transitions, 592 flow [2023-08-30 04:10:50,699 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 281 transitions, 592 flow [2023-08-30 04:10:50,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 281 transitions, 592 flow [2023-08-30 04:10:50,751 INFO L130 PetriNetUnfolder]: 71/512 cut-off events. [2023-08-30 04:10:50,751 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:10:50,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 512 events. 71/512 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2081 event pairs, 1 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 342. Up to 16 conditions per place. [2023-08-30 04:10:50,775 INFO L119 LiptonReduction]: Number of co-enabled transitions 44268 [2023-08-30 04:10:54,303 INFO L134 LiptonReduction]: Checked pairs total: 145069 [2023-08-30 04:10:54,303 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-08-30 04:10:54,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:10:54,305 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;@44ae3960, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:10:54,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:10:54,306 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:10:54,306 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:10:54,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:54,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:10:54,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:10:54,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:54,306 INFO L85 PathProgramCache]: Analyzing trace with hash 50082, now seen corresponding path program 1 times [2023-08-30 04:10:54,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:54,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689591266] [2023-08-30 04:10:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:54,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:54,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:54,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689591266] [2023-08-30 04:10:54,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689591266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:10:54,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:10:54,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:10:54,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733290534] [2023-08-30 04:10:54,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:10:54,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:10:54,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:10:54,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:10:54,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 470 [2023-08-30 04:10:54,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 142 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:54,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:54,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 470 [2023-08-30 04:10:54,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:17,088 INFO L130 PetriNetUnfolder]: 248119/365722 cut-off events. [2023-08-30 04:11:17,088 INFO L131 PetriNetUnfolder]: For 3452/3452 co-relation queries the response was YES. [2023-08-30 04:11:17,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703695 conditions, 365722 events. 248119/365722 cut-off events. For 3452/3452 co-relation queries the response was YES. Maximal size of possible extension queue 9222. Compared 3267230 event pairs, 201875 based on Foata normal form. 44472/355959 useless extension candidates. Maximal degree in co-relation 101722. Up to 290967 conditions per place. [2023-08-30 04:11:19,166 INFO L137 encePairwiseOnDemand]: 427/470 looper letters, 122 selfloop transitions, 2 changer transitions 1/153 dead transitions. [2023-08-30 04:11:19,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 153 transitions, 586 flow [2023-08-30 04:11:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:11:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:11:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 876 transitions. [2023-08-30 04:11:19,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212765957446809 [2023-08-30 04:11:19,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 876 transitions. [2023-08-30 04:11:19,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 876 transitions. [2023-08-30 04:11:19,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:19,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 876 transitions. [2023-08-30 04:11:19,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:19,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:19,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:19,177 INFO L175 Difference]: Start difference. First operand has 105 places, 142 transitions, 314 flow. Second operand 3 states and 876 transitions. [2023-08-30 04:11:19,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 153 transitions, 586 flow [2023-08-30 04:11:19,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 586 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:11:19,187 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 236 flow [2023-08-30 04:11:19,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2023-08-30 04:11:19,188 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 0 predicate places. [2023-08-30 04:11:19,188 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 236 flow [2023-08-30 04:11:19,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:19,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:19,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:11:19,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:11:19,189 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:11:19,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:19,190 INFO L85 PathProgramCache]: Analyzing trace with hash 50080, now seen corresponding path program 1 times [2023-08-30 04:11:19,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:19,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259033799] [2023-08-30 04:11:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:19,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:11:19,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:19,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259033799] [2023-08-30 04:11:19,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259033799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:11:19,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:11:19,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:11:19,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457951216] [2023-08-30 04:11:19,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:11:19,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:11:19,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:11:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:11:19,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 470 [2023-08-30 04:11:19,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:19,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:19,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 470 [2023-08-30 04:11:19,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:38,899 INFO L130 PetriNetUnfolder]: 231647/344121 cut-off events. [2023-08-30 04:11:38,899 INFO L131 PetriNetUnfolder]: For 7687/7687 co-relation queries the response was YES. [2023-08-30 04:11:39,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665760 conditions, 344121 events. 231647/344121 cut-off events. For 7687/7687 co-relation queries the response was YES. Maximal size of possible extension queue 8672. Compared 3080460 event pairs, 141776 based on Foata normal form. 0/304784 useless extension candidates. Maximal degree in co-relation 613909. Up to 313223 conditions per place. [2023-08-30 04:11:40,818 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 91 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-08-30 04:11:40,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 462 flow [2023-08-30 04:11:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:11:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:11:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2023-08-30 04:11:40,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524822695035461 [2023-08-30 04:11:40,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2023-08-30 04:11:40,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2023-08-30 04:11:40,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:11:40,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2023-08-30 04:11:40,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:40,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:40,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:40,825 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 236 flow. Second operand 3 states and 779 transitions. [2023-08-30 04:11:40,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 462 flow [2023-08-30 04:11:42,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 458 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:11:42,687 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 246 flow [2023-08-30 04:11:42,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2023-08-30 04:11:42,688 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 0 predicate places. [2023-08-30 04:11:42,688 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 246 flow [2023-08-30 04:11:42,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:42,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:11:42,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:11:42,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:11:42,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:11:42,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:11:42,689 INFO L85 PathProgramCache]: Analyzing trace with hash -952660068, now seen corresponding path program 1 times [2023-08-30 04:11:42,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:11:42,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133156920] [2023-08-30 04:11:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:42,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:11:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:11:42,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:11:42,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133156920] [2023-08-30 04:11:42,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133156920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:11:42,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139262804] [2023-08-30 04:11:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:11:42,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:11:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:11:42,736 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) [2023-08-30 04:11:42,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:11:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:11:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:11:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:11:42,840 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 [2023-08-30 04:11:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:11:42,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:11:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:11:42,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139262804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:11:42,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:11:42,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:11:42,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064570133] [2023-08-30 04:11:42,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:11:42,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:11:42,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:11:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:11:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:11:42,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 470 [2023-08-30 04:11:42,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 226.71428571428572) internal successors, (1587), 7 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:11:42,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:11:42,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 470 [2023-08-30 04:11:42,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:11:59,858 INFO L130 PetriNetUnfolder]: 218198/309432 cut-off events. [2023-08-30 04:11:59,858 INFO L131 PetriNetUnfolder]: For 22162/22162 co-relation queries the response was YES. [2023-08-30 04:12:00,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632366 conditions, 309432 events. 218198/309432 cut-off events. For 22162/22162 co-relation queries the response was YES. Maximal size of possible extension queue 7750. Compared 2585618 event pairs, 2504 based on Foata normal form. 18/278730 useless extension candidates. Maximal degree in co-relation 42984. Up to 245865 conditions per place. [2023-08-30 04:12:01,425 INFO L137 encePairwiseOnDemand]: 465/470 looper letters, 240 selfloop transitions, 6 changer transitions 0/274 dead transitions. [2023-08-30 04:12:01,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 274 transitions, 1090 flow [2023-08-30 04:12:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:12:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:12:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1600 transitions. [2023-08-30 04:12:01,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2023-08-30 04:12:01,429 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1600 transitions. [2023-08-30 04:12:01,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1600 transitions. [2023-08-30 04:12:01,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:12:01,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1600 transitions. [2023-08-30 04:12:01,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.6666666666667) internal successors, (1600), 6 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:01,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:01,435 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:01,435 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 246 flow. Second operand 6 states and 1600 transitions. [2023-08-30 04:12:01,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 274 transitions, 1090 flow [2023-08-30 04:12:01,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 274 transitions, 1088 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:12:01,442 INFO L231 Difference]: Finished difference. Result has 109 places, 103 transitions, 262 flow [2023-08-30 04:12:01,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=109, PETRI_TRANSITIONS=103} [2023-08-30 04:12:01,443 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 4 predicate places. [2023-08-30 04:12:01,443 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 103 transitions, 262 flow [2023-08-30 04:12:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 226.71428571428572) internal successors, (1587), 7 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:01,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:01,444 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:12:01,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:12:01,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:12:01,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:12:01,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1090959285, now seen corresponding path program 1 times [2023-08-30 04:12:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:01,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719840916] [2023-08-30 04:12:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:01,660 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:12:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:12:01,679 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:12:01,679 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:12:01,680 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:12:01,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:12:01,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:12:01,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:12:01,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:12:01,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:12:01,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:12:01,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:12:01,681 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:12:01,681 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:12:01,681 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:12:01,707 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:12:01,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 345 transitions, 734 flow [2023-08-30 04:12:01,782 INFO L130 PetriNetUnfolder]: 109/774 cut-off events. [2023-08-30 04:12:01,783 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:12:01,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 774 events. 109/774 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3463 event pairs, 6 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 532. Up to 32 conditions per place. [2023-08-30 04:12:01,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 345 transitions, 734 flow [2023-08-30 04:12:01,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 345 transitions, 734 flow [2023-08-30 04:12:01,798 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:12:01,798 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 345 transitions, 734 flow [2023-08-30 04:12:01,798 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 345 transitions, 734 flow [2023-08-30 04:12:01,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 345 transitions, 734 flow [2023-08-30 04:12:01,873 INFO L130 PetriNetUnfolder]: 109/774 cut-off events. [2023-08-30 04:12:01,873 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:12:01,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 774 events. 109/774 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3463 event pairs, 6 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 532. Up to 32 conditions per place. [2023-08-30 04:12:01,908 INFO L119 LiptonReduction]: Number of co-enabled transitions 75144 [2023-08-30 04:12:05,410 INFO L134 LiptonReduction]: Checked pairs total: 250198 [2023-08-30 04:12:05,410 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-08-30 04:12:05,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:12:05,412 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;@44ae3960, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:12:05,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:12:05,413 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:12:05,413 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:12:05,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:12:05,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:12:05,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:12:05,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:12:05,414 INFO L85 PathProgramCache]: Analyzing trace with hash 70291, now seen corresponding path program 1 times [2023-08-30 04:12:05,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:12:05,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47437948] [2023-08-30 04:12:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:12:05,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:12:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:12:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:12:05,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:12:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47437948] [2023-08-30 04:12:05,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47437948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:12:05,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:12:05,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:12:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103967987] [2023-08-30 04:12:05,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:12:05,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:12:05,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:12:05,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:12:05,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:12:05,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 568 [2023-08-30 04:12:05,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 183 transitions, 410 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:12:05,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:12:05,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 568 [2023-08-30 04:12:05,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand