./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 17:12:44,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:12:44,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:12:44,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:12:44,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:12:44,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:12:44,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:12:45,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:12:45,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:12:45,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:12:45,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:12:45,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:12:45,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:12:45,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:12:45,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:12:45,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:12:45,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:12:45,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:12:45,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:12:45,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:12:45,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:12:45,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:12:45,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:12:45,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:12:45,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:12:45,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:12:45,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:12:45,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:12:45,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:12:45,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:12:45,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:12:45,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:12:45,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:12:45,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:12:45,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:12:45,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:12:45,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:12:45,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:12:45,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:12:45,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:12:45,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:12:45,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:12:45,094 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:12:45,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:12:45,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:12:45,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:12:45,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:12:45,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:12:45,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:12:45,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:12:45,098 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:12:45,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:12:45,099 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:12:45,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:12:45,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:12:45,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:12:45,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:12:45,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:12:45,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:12:45,100 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:12:45,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:12:45,100 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:12:45,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:12:45,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:12:45,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:12:45,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:12:45,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:12:45,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:12:45,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:12:45,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:12:45,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:12:45,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:12:45,103 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:12:45,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:12:45,103 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:12:45,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:12:45,104 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:12:45,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:12:45,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:12:45,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:12:45,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:12:45,443 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:12:45,444 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:12:45,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-08-30 17:12:46,719 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:12:47,080 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:12:47,081 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-08-30 17:12:47,097 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333f8e542/6486369cf2c742e691af67d5ee1e7233/FLAG5366a15c0 [2023-08-30 17:12:47,116 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333f8e542/6486369cf2c742e691af67d5ee1e7233 [2023-08-30 17:12:47,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:12:47,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:12:47,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:12:47,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:12:47,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:12:47,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:12:47" (1/1) ... [2023-08-30 17:12:47,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f273073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:47, skipping insertion in model container [2023-08-30 17:12:47,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:12:47" (1/1) ... [2023-08-30 17:12:47,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:12:47,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:12:47,861 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-08-30 17:12:47,904 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-08-30 17:12:47,911 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-08-30 17:12:47,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:12:47,951 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:12:48,005 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-08-30 17:12:48,022 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-08-30 17:12:48,025 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-08-30 17:12:48,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:12:48,130 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 17:12:48,130 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 17:12:48,136 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:12:48,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48 WrapperNode [2023-08-30 17:12:48,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:12:48,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:12:48,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:12:48,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:12:48,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,255 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1831 [2023-08-30 17:12:48,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:12:48,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:12:48,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:12:48,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:12:48,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,362 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:12:48,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:12:48,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:12:48,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:12:48,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (1/1) ... [2023-08-30 17:12:48,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:12:48,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:12:48,433 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 17:12:48,459 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 17:12:48,471 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-08-30 17:12:48,471 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-08-30 17:12:48,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 17:12:48,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:12:48,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 17:12:48,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:12:48,472 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:12:48,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:12:48,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 17:12:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:12:48,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:12:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:12:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 17:12:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:12:48,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:12:48,475 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 17:12:48,806 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:12:48,808 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:12:50,387 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:12:50,731 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:12:50,731 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-30 17:12:50,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:12:50 BoogieIcfgContainer [2023-08-30 17:12:50,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:12:50,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:12:50,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:12:50,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:12:50,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:12:47" (1/3) ... [2023-08-30 17:12:50,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9abc96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:12:50, skipping insertion in model container [2023-08-30 17:12:50,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:12:48" (2/3) ... [2023-08-30 17:12:50,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9abc96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:12:50, skipping insertion in model container [2023-08-30 17:12:50,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:12:50" (3/3) ... [2023-08-30 17:12:50,744 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-08-30 17:12:50,752 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:12:50,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:12:50,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-30 17:12:50,772 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:12:50,912 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:12:50,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-08-30 17:12:51,780 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-08-30 17:12:51,780 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:12:51,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 2943 events. 131/2943 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14098 event pairs, 0 based on Foata normal form. 0/2799 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-08-30 17:12:51,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 1516 places, 1583 transitions, 3174 flow [2023-08-30 17:12:51,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1516 places, 1583 transitions, 3174 flow [2023-08-30 17:12:51,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:12:51,861 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1516 places, 1583 transitions, 3174 flow [2023-08-30 17:12:51,868 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1516 places, 1583 transitions, 3174 flow [2023-08-30 17:12:51,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-08-30 17:12:52,521 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-08-30 17:12:52,522 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:12:52,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 2943 events. 131/2943 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14098 event pairs, 0 based on Foata normal form. 0/2799 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-08-30 17:12:52,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 382480 [2023-08-30 17:13:57,685 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 238 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 17:14:06,295 WARN L222 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 238 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 17:14:09,325 INFO L134 LiptonReduction]: Checked pairs total: 464451 [2023-08-30 17:14:09,325 INFO L136 LiptonReduction]: Total number of compositions: 1491 [2023-08-30 17:14:09,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:14:09,341 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@405dc311, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:14:09,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 17:14:09,346 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 17:14:09,346 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:14:09,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:14:09,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:14:09,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:14:09,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:14:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1810728901, now seen corresponding path program 1 times [2023-08-30 17:14:09,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:14:09,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133460330] [2023-08-30 17:14:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:14:09,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:14:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:14:09,699 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 17:14:09,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:14:09,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133460330] [2023-08-30 17:14:09,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133460330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:14:09,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:14:09,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:14:09,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179892326] [2023-08-30 17:14:09,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:14:09,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:14:09,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:14:09,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:14:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:14:09,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1490 out of 3074 [2023-08-30 17:14:09,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 310 transitions, 628 flow. Second operand has 3 states, 3 states have (on average 1492.3333333333333) internal successors, (4477), 3 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states 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 17:14:09,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:14:09,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1490 of 3074 [2023-08-30 17:14:09,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:14:13,728 INFO L130 PetriNetUnfolder]: 13558/24152 cut-off events. [2023-08-30 17:14:13,729 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:14:13,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48216 conditions, 24152 events. 13558/24152 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 148243 event pairs, 4994 based on Foata normal form. 46/20372 useless extension candidates. Maximal degree in co-relation 48134. Up to 12075 conditions per place. [2023-08-30 17:14:13,845 INFO L137 encePairwiseOnDemand]: 3057/3074 looper letters, 578 selfloop transitions, 14 changer transitions 6/601 dead transitions. [2023-08-30 17:14:13,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 601 transitions, 2404 flow [2023-08-30 17:14:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:14:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:14:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5077 transitions. [2023-08-30 17:14:13,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505313381045326 [2023-08-30 17:14:13,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5077 transitions. [2023-08-30 17:14:13,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5077 transitions. [2023-08-30 17:14:13,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:14:13,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5077 transitions. [2023-08-30 17:14:13,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1692.3333333333333) internal successors, (5077), 3 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states 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 17:14:13,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3074.0) internal successors, (12296), 4 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states 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 17:14:13,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3074.0) internal successors, (12296), 4 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states 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 17:14:13,926 INFO L175 Difference]: Start difference. First operand has 265 places, 310 transitions, 628 flow. Second operand 3 states and 5077 transitions. [2023-08-30 17:14:13,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 601 transitions, 2404 flow [2023-08-30 17:14:13,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 601 transitions, 2404 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:14:13,946 INFO L231 Difference]: Finished difference. Result has 268 places, 311 transitions, 682 flow [2023-08-30 17:14:13,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3074, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=682, PETRI_PLACES=268, PETRI_TRANSITIONS=311} [2023-08-30 17:14:13,953 INFO L281 CegarLoopForPetriNet]: 265 programPoint places, 3 predicate places. [2023-08-30 17:14:13,953 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 311 transitions, 682 flow [2023-08-30 17:14:13,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1492.3333333333333) internal successors, (4477), 3 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states 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 17:14:13,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:14:13,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:14:13,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:14:13,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:14:13,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:14:13,966 INFO L85 PathProgramCache]: Analyzing trace with hash -908627305, now seen corresponding path program 1 times [2023-08-30 17:14:13,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:14:13,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939026130] [2023-08-30 17:14:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:14:13,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:14:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:14:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:14:14,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:14:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939026130] [2023-08-30 17:14:14,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939026130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:14:14,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449175034] [2023-08-30 17:14:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:14:14,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:14:14,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:14:14,250 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 17:14:14,277 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 17:14:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:14:14,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:14:14,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:14:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:14:14,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:14:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:14:14,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449175034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:14:14,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:14:14,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:14:14,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685038089] [2023-08-30 17:14:14,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:14:14,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:14:14,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:14:14,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:14:14,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:14:14,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1484 out of 3074 [2023-08-30 17:14:14,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 311 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 1489.7142857142858) internal successors, (10428), 7 states have internal predecessors, (10428), 0 states have call successors, (0), 0 states 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 17:14:14,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:14:14,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1484 of 3074 [2023-08-30 17:14:14,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:14:14,852 INFO L130 PetriNetUnfolder]: 57/134 cut-off events. [2023-08-30 17:14:14,852 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-30 17:14:14,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 134 events. 57/134 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 273 event pairs, 19 based on Foata normal form. 26/148 useless extension candidates. Maximal degree in co-relation 295. Up to 99 conditions per place. [2023-08-30 17:14:14,853 INFO L137 encePairwiseOnDemand]: 3069/3074 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2023-08-30 17:14:14,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 64 transitions, 277 flow [2023-08-30 17:14:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:14:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:14:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8971 transitions. [2023-08-30 17:14:14,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863912383430926 [2023-08-30 17:14:14,872 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 8971 transitions. [2023-08-30 17:14:14,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8971 transitions. [2023-08-30 17:14:14,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:14:14,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 8971 transitions. [2023-08-30 17:14:14,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1495.1666666666667) internal successors, (8971), 6 states have internal predecessors, (8971), 0 states have call successors, (0), 0 states 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 17:14:14,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3074.0) internal successors, (21518), 7 states have internal predecessors, (21518), 0 states have call successors, (0), 0 states 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 17:14:14,927 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3074.0) internal successors, (21518), 7 states have internal predecessors, (21518), 0 states have call successors, (0), 0 states 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 17:14:14,927 INFO L175 Difference]: Start difference. First operand has 268 places, 311 transitions, 682 flow. Second operand 6 states and 8971 transitions. [2023-08-30 17:14:14,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 64 transitions, 277 flow [2023-08-30 17:14:14,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 64 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:14:14,929 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-30 17:14:14,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3074, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-30 17:14:14,930 INFO L281 CegarLoopForPetriNet]: 265 programPoint places, -227 predicate places. [2023-08-30 17:14:14,930 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-30 17:14:14,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1489.7142857142858) internal successors, (10428), 7 states have internal predecessors, (10428), 0 states have call successors, (0), 0 states 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 17:14:14,935 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-30 17:14:14,935 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 17:14:14,936 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 17:14:14,936 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 17:14:14,936 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 17:14:14,947 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 17:14:15,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:14:15,146 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 17:14:15,148 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 17:14:15,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-08-30 17:14:15,645 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-08-30 17:14:15,645 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:14:15,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 2943 events. 131/2943 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14098 event pairs, 0 based on Foata normal form. 0/2799 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-08-30 17:14:15,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 1516 places, 1583 transitions, 3174 flow [2023-08-30 17:14:15,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1512 places, 1578 transitions, 3161 flow [2023-08-30 17:14:15,693 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:14:15,693 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1512 places, 1578 transitions, 3161 flow [2023-08-30 17:14:15,693 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1512 places, 1578 transitions, 3161 flow [2023-08-30 17:14:15,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1512 places, 1578 transitions, 3161 flow [2023-08-30 17:14:16,224 INFO L130 PetriNetUnfolder]: 130/2938 cut-off events. [2023-08-30 17:14:16,224 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:14:16,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 2938 events. 130/2938 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14037 event pairs, 0 based on Foata normal form. 0/2794 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-08-30 17:14:16,313 INFO L119 LiptonReduction]: Number of co-enabled transitions 382480 [2023-08-30 17:15:22,442 WARN L222 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 232 DAG size of output: 223 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 17:15:30,190 WARN L222 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 232 DAG size of output: 223 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 17:15:33,199 INFO L134 LiptonReduction]: Checked pairs total: 470527 [2023-08-30 17:15:33,199 INFO L136 LiptonReduction]: Total number of compositions: 1497 [2023-08-30 17:15:33,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 17:15:33,202 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@405dc311, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:15:33,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 17:15:33,206 INFO L130 PetriNetUnfolder]: 2/27 cut-off events. [2023-08-30 17:15:33,206 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:15:33,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:15:33,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-30 17:15:33,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:15:33,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:15:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash 966382152, now seen corresponding path program 1 times [2023-08-30 17:15:33,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:15:33,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776850591] [2023-08-30 17:15:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:15:33,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:15:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:15:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 17:15:33,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:15:33,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776850591] [2023-08-30 17:15:33,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776850591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:15:33,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:15:33,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:15:33,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66141125] [2023-08-30 17:15:33,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:15:33,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:15:33,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:15:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:15:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:15:33,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1490 out of 3080 [2023-08-30 17:15:33,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 312 transitions, 629 flow. Second operand has 3 states, 3 states have (on average 1491.6666666666667) internal successors, (4475), 3 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states 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 17:15:33,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:15:33,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1490 of 3080 [2023-08-30 17:15:33,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:15:36,594 INFO L130 PetriNetUnfolder]: 15259/26838 cut-off events. [2023-08-30 17:15:36,594 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:15:36,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53581 conditions, 26838 events. 15259/26838 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 163138 event pairs, 5472 based on Foata normal form. 50/22322 useless extension candidates. Maximal degree in co-relation 53514. Up to 13444 conditions per place. [2023-08-30 17:15:36,630 INFO L137 encePairwiseOnDemand]: 3067/3080 looper letters, 62 selfloop transitions, 4 changer transitions 537/604 dead transitions. [2023-08-30 17:15:36,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 604 transitions, 2415 flow [2023-08-30 17:15:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:15:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:15:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5079 transitions. [2023-08-30 17:15:36,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496753246753247 [2023-08-30 17:15:36,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5079 transitions. [2023-08-30 17:15:36,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5079 transitions. [2023-08-30 17:15:36,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:15:36,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5079 transitions. [2023-08-30 17:15:36,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1693.0) internal successors, (5079), 3 states have internal predecessors, (5079), 0 states have call successors, (0), 0 states 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 17:15:36,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3080.0) internal successors, (12320), 4 states have internal predecessors, (12320), 0 states have call successors, (0), 0 states 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 17:15:36,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3080.0) internal successors, (12320), 4 states have internal predecessors, (12320), 0 states have call successors, (0), 0 states 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 17:15:36,667 INFO L175 Difference]: Start difference. First operand has 266 places, 312 transitions, 629 flow. Second operand 3 states and 5079 transitions. [2023-08-30 17:15:36,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 604 transitions, 2415 flow [2023-08-30 17:15:36,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 604 transitions, 2415 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:15:36,674 INFO L231 Difference]: Finished difference. Result has 266 places, 37 transitions, 93 flow [2023-08-30 17:15:36,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3080, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=266, PETRI_TRANSITIONS=37} [2023-08-30 17:15:36,676 INFO L281 CegarLoopForPetriNet]: 266 programPoint places, 0 predicate places. [2023-08-30 17:15:36,677 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 37 transitions, 93 flow [2023-08-30 17:15:36,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1491.6666666666667) internal successors, (4475), 3 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states 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 17:15:36,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:15:36,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 17:15:36,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 17:15:36,678 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:15:36,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:15:36,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1754499281, now seen corresponding path program 1 times [2023-08-30 17:15:36,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:15:36,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563276624] [2023-08-30 17:15:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:15:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:15:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:15:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 17:15:36,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:15:36,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563276624] [2023-08-30 17:15:36,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563276624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:15:36,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964174776] [2023-08-30 17:15:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:15:36,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:15:36,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:15:36,773 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 17:15:36,799 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 17:15:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:15:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:15:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:15:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 17:15:36,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:15:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 17:15:36,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964174776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:15:36,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:15:36,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:15:36,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158866387] [2023-08-30 17:15:36,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:15:36,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:15:36,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:15:36,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:15:36,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:15:37,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1484 out of 3080 [2023-08-30 17:15:37,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 37 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 1485.5714285714287) internal successors, (10399), 7 states have internal predecessors, (10399), 0 states have call successors, (0), 0 states 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 17:15:37,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:15:37,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1484 of 3080 [2023-08-30 17:15:37,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:15:37,209 INFO L130 PetriNetUnfolder]: 64/171 cut-off events. [2023-08-30 17:15:37,209 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 17:15:37,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 171 events. 64/171 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 534 event pairs, 0 based on Foata normal form. 3/159 useless extension candidates. Maximal degree in co-relation 324. Up to 109 conditions per place. [2023-08-30 17:15:37,210 INFO L137 encePairwiseOnDemand]: 3076/3080 looper letters, 62 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2023-08-30 17:15:37,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 70 transitions, 303 flow [2023-08-30 17:15:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:15:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:15:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8976 transitions. [2023-08-30 17:15:37,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-08-30 17:15:37,233 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 8976 transitions. [2023-08-30 17:15:37,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8976 transitions. [2023-08-30 17:15:37,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:15:37,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 8976 transitions. [2023-08-30 17:15:37,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1496.0) internal successors, (8976), 6 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states 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 17:15:37,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3080.0) internal successors, (21560), 7 states have internal predecessors, (21560), 0 states have call successors, (0), 0 states 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 17:15:37,279 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3080.0) internal successors, (21560), 7 states have internal predecessors, (21560), 0 states have call successors, (0), 0 states 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 17:15:37,279 INFO L175 Difference]: Start difference. First operand has 266 places, 37 transitions, 93 flow. Second operand 6 states and 8976 transitions. [2023-08-30 17:15:37,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 70 transitions, 303 flow [2023-08-30 17:15:37,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:15:37,282 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 117 flow [2023-08-30 17:15:37,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3080, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-08-30 17:15:37,284 INFO L281 CegarLoopForPetriNet]: 266 programPoint places, -226 predicate places. [2023-08-30 17:15:37,284 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 117 flow [2023-08-30 17:15:37,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1485.5714285714287) internal successors, (10399), 7 states have internal predecessors, (10399), 0 states have call successors, (0), 0 states 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 17:15:37,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:15:37,287 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-30 17:15:37,296 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 17:15:37,493 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,SelfDestructingSolverStorable3 [2023-08-30 17:15:37,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:15:37,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:15:37,494 INFO L85 PathProgramCache]: Analyzing trace with hash 93826184, now seen corresponding path program 2 times [2023-08-30 17:15:37,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:15:37,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969903538] [2023-08-30 17:15:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:15:37,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:15:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:15:37,600 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 17:15:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 17:15:37,682 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 17:15:37,683 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 17:15:37,683 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 17:15:37,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 17:15:37,683 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-30 17:15:37,684 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 17:15:37,684 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 17:15:37,684 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 17:15:37,777 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 17:15:37,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-08-30 17:15:38,664 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-08-30 17:15:38,664 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:15:38,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 4488 events. 204/4488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26614 event pairs, 0 based on Foata normal form. 0/4264 useless extension candidates. Maximal degree in co-relation 2945. Up to 9 conditions per place. [2023-08-30 17:15:38,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 1653 places, 1725 transitions, 3468 flow [2023-08-30 17:15:38,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1653 places, 1725 transitions, 3468 flow [2023-08-30 17:15:38,741 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:15:38,741 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-08-30 17:15:38,741 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-08-30 17:15:38,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-08-30 17:15:39,603 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-08-30 17:15:39,603 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 17:15:39,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 4488 events. 204/4488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26614 event pairs, 0 based on Foata normal form. 0/4264 useless extension candidates. Maximal degree in co-relation 2945. Up to 9 conditions per place. [2023-08-30 17:15:39,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 807240 [2023-08-30 17:17:04,262 WARN L222 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 214 DAG size of output: 209 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 17:17:07,717 INFO L134 LiptonReduction]: Checked pairs total: 1019905 [2023-08-30 17:17:07,717 INFO L136 LiptonReduction]: Total number of compositions: 1619 [2023-08-30 17:17:07,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:17:07,720 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@405dc311, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:17:07,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 17:17:07,723 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2023-08-30 17:17:07,723 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 17:17:07,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:17:07,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:17:07,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:17:07,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:17:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash 475578972, now seen corresponding path program 1 times [2023-08-30 17:17:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:17:07,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882310612] [2023-08-30 17:17:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:17:07,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:17:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:17:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:17:07,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:17:07,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882310612] [2023-08-30 17:17:07,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882310612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:17:07,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:17:07,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 17:17:07,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844726480] [2023-08-30 17:17:07,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:17:07,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:17:07,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:17:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:17:07,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:17:07,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1625 out of 3344 [2023-08-30 17:17:07,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 340 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 1627.3333333333333) internal successors, (4882), 3 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states 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 17:17:07,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:17:07,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1625 of 3344 [2023-08-30 17:17:07,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:18:34,466 INFO L130 PetriNetUnfolder]: 646028/919524 cut-off events. [2023-08-30 17:18:34,466 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-30 17:18:35,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1835526 conditions, 919524 events. 646028/919524 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 4074. Compared 6638257 event pairs, 254886 based on Foata normal form. 2400/778275 useless extension candidates. Maximal degree in co-relation 1773715. Up to 460488 conditions per place. [2023-08-30 17:18:38,024 INFO L137 encePairwiseOnDemand]: 3327/3344 looper letters, 636 selfloop transitions, 14 changer transitions 6/661 dead transitions. [2023-08-30 17:18:38,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 661 transitions, 2656 flow [2023-08-30 17:18:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:18:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:18:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5540 transitions. [2023-08-30 17:18:38,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522328548644339 [2023-08-30 17:18:38,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5540 transitions. [2023-08-30 17:18:38,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5540 transitions. [2023-08-30 17:18:38,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:18:38,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5540 transitions. [2023-08-30 17:18:38,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1846.6666666666667) internal successors, (5540), 3 states have internal predecessors, (5540), 0 states have call successors, (0), 0 states 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 17:18:38,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3344.0) internal successors, (13376), 4 states have internal predecessors, (13376), 0 states have call successors, (0), 0 states 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 17:18:38,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3344.0) internal successors, (13376), 4 states have internal predecessors, (13376), 0 states have call successors, (0), 0 states 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 17:18:38,059 INFO L175 Difference]: Start difference. First operand has 291 places, 340 transitions, 698 flow. Second operand 3 states and 5540 transitions. [2023-08-30 17:18:38,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 661 transitions, 2656 flow [2023-08-30 17:18:38,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 661 transitions, 2656 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:18:38,072 INFO L231 Difference]: Finished difference. Result has 294 places, 342 transitions, 756 flow [2023-08-30 17:18:38,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3344, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=756, PETRI_PLACES=294, PETRI_TRANSITIONS=342} [2023-08-30 17:18:38,074 INFO L281 CegarLoopForPetriNet]: 291 programPoint places, 3 predicate places. [2023-08-30 17:18:38,074 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 342 transitions, 756 flow [2023-08-30 17:18:38,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1627.3333333333333) internal successors, (4882), 3 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states 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 17:18:38,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:18:38,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:18:38,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 17:18:38,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 17:18:38,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:18:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1430036538, now seen corresponding path program 1 times [2023-08-30 17:18:38,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:18:38,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715056950] [2023-08-30 17:18:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:18:38,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:18:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:18:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:18:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:18:38,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715056950] [2023-08-30 17:18:38,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715056950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:18:38,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879465389] [2023-08-30 17:18:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:18:38,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:18:38,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:18:38,221 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 17:18:38,223 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 17:18:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:18:38,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:18:38,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:18:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:18:38,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:18:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:18:38,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879465389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:18:38,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:18:38,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 17:18:38,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604651017] [2023-08-30 17:18:38,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:18:38,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:18:38,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:18:38,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:18:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:18:38,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1619 out of 3344 [2023-08-30 17:18:38,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 342 transitions, 756 flow. Second operand has 7 states, 7 states have (on average 1624.7142857142858) internal successors, (11373), 7 states have internal predecessors, (11373), 0 states have call successors, (0), 0 states 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 17:18:38,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:18:38,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1619 of 3344 [2023-08-30 17:18:38,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand