./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 BEFORE --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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 10:12:37,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 10:12:37,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 10:12:37,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 10:12:37,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 10:12:37,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 10:12:37,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 10:12:38,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 10:12:38,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 10:12:38,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 10:12:38,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 10:12:38,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 10:12:38,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 10:12:38,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 10:12:38,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 10:12:38,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 10:12:38,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 10:12:38,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 10:12:38,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 10:12:38,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 10:12:38,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 10:12:38,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 10:12:38,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 10:12:38,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 10:12:38,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 10:12:38,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 10:12:38,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 10:12:38,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 10:12:38,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 10:12:38,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 10:12:38,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 10:12:38,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 10:12:38,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 10:12:38,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 10:12:38,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 10:12:38,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 10:12:38,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 10:12:38,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 10:12:38,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 10:12:38,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 10:12:38,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 10:12:38,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 10:12:38,096 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 10:12:38,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 10:12:38,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 10:12:38,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 10:12:38,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 10:12:38,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 10:12:38,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 10:12:38,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 10:12:38,100 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 10:12:38,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 10:12:38,101 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 10:12:38,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 10:12:38,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 10:12:38,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 10:12:38,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 10:12:38,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 10:12:38,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 10:12:38,103 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 10:12:38,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 10:12:38,103 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 10:12:38,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 10:12:38,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 10:12:38,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 10:12:38,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 10:12:38,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 10:12:38,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 10:12:38,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 10:12:38,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 10:12:38,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 10:12:38,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 10:12:38,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 10:12:38,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 10:12:38,106 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 10:12:38,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 10:12:38,107 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 10:12:38,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 10:12:38,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 10:12:38,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 10:12:38,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 10:12:38,440 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 10:12:38,441 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 10:12:38,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-09-01 10:12:39,586 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 10:12:39,918 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 10:12:39,919 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-09-01 10:12:39,934 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72670fee4/03d440ad90de4415a1ff91d4f3360bec/FLAGeb68d9b4c [2023-09-01 10:12:39,948 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72670fee4/03d440ad90de4415a1ff91d4f3360bec [2023-09-01 10:12:39,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 10:12:39,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 10:12:39,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 10:12:39,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 10:12:39,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 10:12:39,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 10:12:39" (1/1) ... [2023-09-01 10:12:39,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6fd59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:39, skipping insertion in model container [2023-09-01 10:12:39,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 10:12:39" (1/1) ... [2023-09-01 10:12:39,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 10:12:40,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 10:12:40,764 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] [2023-09-01 10:12:40,804 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] [2023-09-01 10:12:40,814 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] [2023-09-01 10:12:40,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 10:12:40,850 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 10:12:40,899 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] [2023-09-01 10:12:40,927 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] [2023-09-01 10:12:40,930 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] [2023-09-01 10:12:40,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 10:12:41,060 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 10:12:41,061 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 10:12:41,067 INFO L208 MainTranslator]: Completed translation [2023-09-01 10:12:41,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41 WrapperNode [2023-09-01 10:12:41,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 10:12:41,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 10:12:41,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 10:12:41,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 10:12:41,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,190 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1831 [2023-09-01 10:12:41,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 10:12:41,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 10:12:41,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 10:12:41,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 10:12:41,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,319 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 10:12:41,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 10:12:41,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 10:12:41,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 10:12:41,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (1/1) ... [2023-09-01 10:12:41,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 10:12:41,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:12:41,398 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) [2023-09-01 10:12:41,418 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 [2023-09-01 10:12:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-09-01 10:12:41,434 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-09-01 10:12:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 10:12:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 10:12:41,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 10:12:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 10:12:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 10:12:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 10:12:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 10:12:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 10:12:41,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 10:12:41,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 10:12:41,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 10:12:41,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 10:12:41,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 10:12:41,438 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 10:12:41,728 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 10:12:41,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 10:12:43,280 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 10:12:43,575 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 10:12:43,575 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-09-01 10:12:43,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 10:12:43 BoogieIcfgContainer [2023-09-01 10:12:43,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 10:12:43,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 10:12:43,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 10:12:43,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 10:12:43,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 10:12:39" (1/3) ... [2023-09-01 10:12:43,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e6d9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 10:12:43, skipping insertion in model container [2023-09-01 10:12:43,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 10:12:41" (2/3) ... [2023-09-01 10:12:43,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e6d9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 10:12:43, skipping insertion in model container [2023-09-01 10:12:43,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 10:12:43" (3/3) ... [2023-09-01 10:12:43,587 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-09-01 10:12:43,594 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 10:12:43,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 10:12:43,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-09-01 10:12:43,603 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 10:12:43,769 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 10:12:43,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-09-01 10:12:44,625 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-09-01 10:12:44,626 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 10:12:44,659 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. [2023-09-01 10:12:44,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 1516 places, 1583 transitions, 3174 flow [2023-09-01 10:12:44,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1512 places, 1578 transitions, 3161 flow [2023-09-01 10:12:44,683 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 10:12:44,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1512 places, 1578 transitions, 3161 flow [2023-09-01 10:12:44,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1512 places, 1578 transitions, 3161 flow [2023-09-01 10:12:44,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1512 places, 1578 transitions, 3161 flow [2023-09-01 10:12:45,370 INFO L130 PetriNetUnfolder]: 130/2938 cut-off events. [2023-09-01 10:12:45,371 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 10:12:45,397 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. [2023-09-01 10:12:45,485 INFO L119 LiptonReduction]: Number of co-enabled transitions 382480 [2023-09-01 10:13:55,835 WARN L222 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 254 DAG size of output: 246 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 10:14:04,832 WARN L222 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 254 DAG size of output: 246 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 10:14:08,473 INFO L134 LiptonReduction]: Checked pairs total: 468273 [2023-09-01 10:14:08,473 INFO L136 LiptonReduction]: Total number of compositions: 1493 [2023-09-01 10:14:08,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 10:14:08,490 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;@e3d611, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 10:14:08,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 10:14:08,496 INFO L130 PetriNetUnfolder]: 2/28 cut-off events. [2023-09-01 10:14:08,496 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 10:14:08,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:14:08,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 10:14:08,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:14:08,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:14:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash 256841199, now seen corresponding path program 1 times [2023-09-01 10:14:08,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:14:08,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999493260] [2023-09-01 10:14:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:14:08,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:14:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:14:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 10:14:08,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:14:08,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999493260] [2023-09-01 10:14:08,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999493260] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 10:14:08,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 10:14:08,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 10:14:08,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481038125] [2023-09-01 10:14:08,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 10:14:08,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 10:14:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:14:08,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 10:14:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 10:14:09,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1490 out of 3076 [2023-09-01 10:14:09,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 307 transitions, 619 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) [2023-09-01 10:14:09,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:14:09,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1490 of 3076 [2023-09-01 10:14:09,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:14:13,283 INFO L130 PetriNetUnfolder]: 14422/25324 cut-off events. [2023-09-01 10:14:13,285 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 10:14:13,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50555 conditions, 25324 events. 14422/25324 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 153725 event pairs, 5129 based on Foata normal form. 48/20990 useless extension candidates. Maximal degree in co-relation 50490. Up to 12711 conditions per place. [2023-09-01 10:14:13,339 INFO L137 encePairwiseOnDemand]: 3063/3076 looper letters, 60 selfloop transitions, 4 changer transitions 526/592 dead transitions. [2023-09-01 10:14:13,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 592 transitions, 2365 flow [2023-09-01 10:14:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 10:14:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 10:14:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5066 transitions. [2023-09-01 10:14:13,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489813610749892 [2023-09-01 10:14:13,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5066 transitions. [2023-09-01 10:14:13,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5066 transitions. [2023-09-01 10:14:13,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:14:13,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5066 transitions. [2023-09-01 10:14:13,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1688.6666666666667) internal successors, (5066), 3 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:14:13,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3076.0) internal successors, (12304), 4 states have internal predecessors, (12304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:14:13,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3076.0) internal successors, (12304), 4 states have internal predecessors, (12304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:14:13,430 INFO L175 Difference]: Start difference. First operand has 262 places, 307 transitions, 619 flow. Second operand 3 states and 5066 transitions. [2023-09-01 10:14:13,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 592 transitions, 2365 flow [2023-09-01 10:14:13,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 592 transitions, 2365 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 10:14:13,446 INFO L231 Difference]: Finished difference. Result has 262 places, 37 transitions, 93 flow [2023-09-01 10:14:13,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3076, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=262, PETRI_TRANSITIONS=37} [2023-09-01 10:14:13,455 INFO L281 CegarLoopForPetriNet]: 262 programPoint places, 0 predicate places. [2023-09-01 10:14:13,456 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 37 transitions, 93 flow [2023-09-01 10:14:13,458 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) [2023-09-01 10:14:13,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:14:13,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 10:14:13,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 10:14:13,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:14:13,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:14:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash -961358549, now seen corresponding path program 1 times [2023-09-01 10:14:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:14:13,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918007468] [2023-09-01 10:14:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:14:13,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:14:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:14:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 10:14:13,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:14:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918007468] [2023-09-01 10:14:13,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918007468] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:14:13,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146357035] [2023-09-01 10:14:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:14:13,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:14:13,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:14:13,628 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) [2023-09-01 10:14:13,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 10:14:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:14:13,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 10:14:13,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:14:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 10:14:13,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:14:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 10:14:13,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146357035] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:14:13,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:14:13,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 10:14:13,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999047004] [2023-09-01 10:14:13,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:14:13,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 10:14:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:14:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 10:14:13,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 10:14:13,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1484 out of 3076 [2023-09-01 10:14:13,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 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) [2023-09-01 10:14:13,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:14:13,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1484 of 3076 [2023-09-01 10:14:13,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:14:14,122 INFO L130 PetriNetUnfolder]: 62/146 cut-off events. [2023-09-01 10:14:14,123 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 10:14:14,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 146 events. 62/146 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 323 event pairs, 20 based on Foata normal form. 3/134 useless extension candidates. Maximal degree in co-relation 313. Up to 105 conditions per place. [2023-09-01 10:14:14,124 INFO L137 encePairwiseOnDemand]: 3072/3076 looper letters, 60 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2023-09-01 10:14:14,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 297 flow [2023-09-01 10:14:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 10:14:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 10:14:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8974 transitions. [2023-09-01 10:14:14,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4862375379280451 [2023-09-01 10:14:14,147 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 8974 transitions. [2023-09-01 10:14:14,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8974 transitions. [2023-09-01 10:14:14,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:14:14,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 8974 transitions. [2023-09-01 10:14:14,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1495.6666666666667) internal successors, (8974), 6 states have internal predecessors, (8974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:14:14,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3076.0) internal successors, (21532), 7 states have internal predecessors, (21532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:14:14,216 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3076.0) internal successors, (21532), 7 states have internal predecessors, (21532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:14:14,216 INFO L175 Difference]: Start difference. First operand has 262 places, 37 transitions, 93 flow. Second operand 6 states and 8974 transitions. [2023-09-01 10:14:14,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 297 flow [2023-09-01 10:14:14,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 10:14:14,219 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 117 flow [2023-09-01 10:14:14,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3076, 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} [2023-09-01 10:14:14,220 INFO L281 CegarLoopForPetriNet]: 262 programPoint places, -222 predicate places. [2023-09-01 10:14:14,220 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 117 flow [2023-09-01 10:14:14,222 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) [2023-09-01 10:14:14,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:14:14,223 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 10:14:14,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 10:14:14,430 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 [2023-09-01 10:14:14,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:14:14,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:14:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1444739857, now seen corresponding path program 2 times [2023-09-01 10:14:14,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:14:14,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244498143] [2023-09-01 10:14:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:14:14,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:14:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 10:14:14,579 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 10:14:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 10:14:14,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 10:14:14,664 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 10:14:14,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 10:14:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 10:14:14,666 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-09-01 10:14:14,669 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 10:14:14,669 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 10:14:14,670 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 10:14:14,766 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 10:14:14,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:14:15,873 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-09-01 10:14:15,873 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 10:14:15,955 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. [2023-09-01 10:14:15,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:14:15,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:14:15,979 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 10:14:15,979 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:14:15,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:14:15,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:14:16,951 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-09-01 10:14:16,951 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 10:14:17,009 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. [2023-09-01 10:14:17,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 807240 [2023-09-01 10:15:38,527 WARN L222 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 239 DAG size of output: 234 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 10:15:47,285 WARN L222 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 239 DAG size of output: 234 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 10:15:50,917 INFO L134 LiptonReduction]: Checked pairs total: 1038917 [2023-09-01 10:15:50,917 INFO L136 LiptonReduction]: Total number of compositions: 1620 [2023-09-01 10:15:50,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 10:15:50,920 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;@e3d611, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 10:15:50,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 10:15:50,929 INFO L130 PetriNetUnfolder]: 3/69 cut-off events. [2023-09-01 10:15:50,929 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 10:15:50,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:15:50,929 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 10:15:50,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:15:50,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:15:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash 11611069, now seen corresponding path program 1 times [2023-09-01 10:15:50,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:15:50,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113539835] [2023-09-01 10:15:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:15:50,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:15:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:15:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 10:15:51,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:15:51,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113539835] [2023-09-01 10:15:51,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113539835] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 10:15:51,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 10:15:51,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 10:15:51,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850803344] [2023-09-01 10:15:51,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 10:15:51,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 10:15:51,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:15:51,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 10:15:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 10:15:51,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1625 out of 3345 [2023-09-01 10:15:51,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 344 transitions, 706 flow. Second operand has 3 states, 3 states have (on average 1627.0) internal successors, (4881), 3 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:15:51,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:15:51,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1625 of 3345 [2023-09-01 10:15:51,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:17:17,432 INFO L130 PetriNetUnfolder]: 627068/892035 cut-off events. [2023-09-01 10:17:17,433 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-09-01 10:17:18,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1781748 conditions, 892035 events. 627068/892035 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 4116. Compared 6455422 event pairs, 245339 based on Foata normal form. 1152/750850 useless extension candidates. Maximal degree in co-relation 1719700. Up to 447244 conditions per place. [2023-09-01 10:17:18,840 INFO L137 encePairwiseOnDemand]: 3329/3345 looper letters, 86 selfloop transitions, 4 changer transitions 578/671 dead transitions. [2023-09-01 10:17:18,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 671 transitions, 2696 flow [2023-09-01 10:17:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 10:17:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 10:17:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5548 transitions. [2023-09-01 10:17:18,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528649725959143 [2023-09-01 10:17:18,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5548 transitions. [2023-09-01 10:17:18,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5548 transitions. [2023-09-01 10:17:18,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:17:18,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5548 transitions. [2023-09-01 10:17:18,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1849.3333333333333) internal successors, (5548), 3 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:18,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3345.0) internal successors, (13380), 4 states have internal predecessors, (13380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:18,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3345.0) internal successors, (13380), 4 states have internal predecessors, (13380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:18,884 INFO L175 Difference]: Start difference. First operand has 293 places, 344 transitions, 706 flow. Second operand 3 states and 5548 transitions. [2023-09-01 10:17:18,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 671 transitions, 2696 flow [2023-09-01 10:17:18,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 671 transitions, 2696 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 10:17:18,893 INFO L231 Difference]: Finished difference. Result has 296 places, 65 transitions, 158 flow [2023-09-01 10:17:18,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3345, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=296, PETRI_TRANSITIONS=65} [2023-09-01 10:17:18,894 INFO L281 CegarLoopForPetriNet]: 293 programPoint places, 3 predicate places. [2023-09-01 10:17:18,894 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 65 transitions, 158 flow [2023-09-01 10:17:18,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1627.0) internal successors, (4881), 3 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:18,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:17:18,896 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 10:17:18,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 10:17:18,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:17:18,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:17:18,897 INFO L85 PathProgramCache]: Analyzing trace with hash -71965933, now seen corresponding path program 1 times [2023-09-01 10:17:18,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:17:18,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310839186] [2023-09-01 10:17:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:17:18,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:17:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:17:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 10:17:18,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:17:18,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310839186] [2023-09-01 10:17:18,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310839186] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:17:18,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731520456] [2023-09-01 10:17:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:17:18,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:17:19,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:17:19,005 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) [2023-09-01 10:17:19,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 10:17:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:17:19,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 10:17:19,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:17:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 10:17:19,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 10:17:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 10:17:19,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731520456] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 10:17:19,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 10:17:19,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 10:17:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251789596] [2023-09-01 10:17:19,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 10:17:19,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 10:17:19,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:17:19,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 10:17:19,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 10:17:19,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1619 out of 3345 [2023-09-01 10:17:19,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 65 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 1620.7142857142858) internal successors, (11345), 7 states have internal predecessors, (11345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:19,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:17:19,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1619 of 3345 [2023-09-01 10:17:19,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:17:19,868 INFO L130 PetriNetUnfolder]: 3266/5098 cut-off events. [2023-09-01 10:17:19,869 INFO L131 PetriNetUnfolder]: For 624/624 co-relation queries the response was YES. [2023-09-01 10:17:19,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10835 conditions, 5098 events. 3266/5098 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 24775 event pairs, 528 based on Foata normal form. 3/4525 useless extension candidates. Maximal degree in co-relation 568. Up to 3169 conditions per place. [2023-09-01 10:17:19,888 INFO L137 encePairwiseOnDemand]: 3340/3345 looper letters, 138 selfloop transitions, 9 changer transitions 0/150 dead transitions. [2023-09-01 10:17:19,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 150 transitions, 628 flow [2023-09-01 10:17:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 10:17:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 10:17:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9864 transitions. [2023-09-01 10:17:19,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914798206278027 [2023-09-01 10:17:19,910 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 9864 transitions. [2023-09-01 10:17:19,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 9864 transitions. [2023-09-01 10:17:19,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:17:19,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 9864 transitions. [2023-09-01 10:17:19,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1644.0) internal successors, (9864), 6 states have internal predecessors, (9864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:19,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3345.0) internal successors, (23415), 7 states have internal predecessors, (23415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:19,961 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3345.0) internal successors, (23415), 7 states have internal predecessors, (23415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:19,961 INFO L175 Difference]: Start difference. First operand has 296 places, 65 transitions, 158 flow. Second operand 6 states and 9864 transitions. [2023-09-01 10:17:19,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 150 transitions, 628 flow [2023-09-01 10:17:19,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 150 transitions, 622 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 10:17:19,967 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 192 flow [2023-09-01 10:17:19,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3345, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-09-01 10:17:19,968 INFO L281 CegarLoopForPetriNet]: 293 programPoint places, -226 predicate places. [2023-09-01 10:17:19,968 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 192 flow [2023-09-01 10:17:19,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1620.7142857142858) internal successors, (11345), 7 states have internal predecessors, (11345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:19,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:17:19,971 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 10:17:19,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 10:17:20,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:17:20,178 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 10:17:20,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:17:20,178 INFO L85 PathProgramCache]: Analyzing trace with hash -137408195, now seen corresponding path program 2 times [2023-09-01 10:17:20,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:17:20,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024855804] [2023-09-01 10:17:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:17:20,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:17:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:17:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 10:17:20,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:17:20,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024855804] [2023-09-01 10:17:20,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024855804] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 10:17:20,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340148518] [2023-09-01 10:17:20,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 10:17:20,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:17:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 10:17:20,357 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) [2023-09-01 10:17:20,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 10:17:20,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 10:17:20,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 10:17:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 10:17:20,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 10:17:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 10:17:20,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 10:17:20,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340148518] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 10:17:20,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 10:17:20,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-09-01 10:17:20,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083258296] [2023-09-01 10:17:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 10:17:20,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 10:17:20,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:17:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 10:17:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 10:17:20,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1621 out of 3345 [2023-09-01 10:17:20,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 1623.0) internal successors, (8115), 5 states have internal predecessors, (8115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:20,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:17:20,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1621 of 3345 [2023-09-01 10:17:20,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 10:17:21,506 INFO L130 PetriNetUnfolder]: 2021/3253 cut-off events. [2023-09-01 10:17:21,506 INFO L131 PetriNetUnfolder]: For 3408/3408 co-relation queries the response was YES. [2023-09-01 10:17:21,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7730 conditions, 3253 events. 2021/3253 cut-off events. For 3408/3408 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 15020 event pairs, 0 based on Foata normal form. 552/3416 useless extension candidates. Maximal degree in co-relation 382. Up to 1801 conditions per place. [2023-09-01 10:17:21,511 INFO L137 encePairwiseOnDemand]: 3340/3345 looper letters, 0 selfloop transitions, 0 changer transitions 148/148 dead transitions. [2023-09-01 10:17:21,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 148 transitions, 639 flow [2023-09-01 10:17:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 10:17:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 10:17:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 8250 transitions. [2023-09-01 10:17:21,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49327354260089684 [2023-09-01 10:17:21,525 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 8250 transitions. [2023-09-01 10:17:21,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 8250 transitions. [2023-09-01 10:17:21,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 10:17:21,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 8250 transitions. [2023-09-01 10:17:21,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 1650.0) internal successors, (8250), 5 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:21,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 3345.0) internal successors, (20070), 6 states have internal predecessors, (20070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:21,553 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 3345.0) internal successors, (20070), 6 states have internal predecessors, (20070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:21,554 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 192 flow. Second operand 5 states and 8250 transitions. [2023-09-01 10:17:21,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 148 transitions, 639 flow [2023-09-01 10:17:21,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 148 transitions, 618 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 10:17:21,558 INFO L231 Difference]: Finished difference. Result has 67 places, 0 transitions, 0 flow [2023-09-01 10:17:21,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3345, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=67, PETRI_TRANSITIONS=0} [2023-09-01 10:17:21,562 INFO L281 CegarLoopForPetriNet]: 293 programPoint places, -226 predicate places. [2023-09-01 10:17:21,562 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 0 transitions, 0 flow [2023-09-01 10:17:21,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1623.0) internal successors, (8115), 5 states have internal predecessors, (8115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 10:17:21,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 10:17:21,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 10:17:21,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 10:17:21,773 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-09-01 10:17:21,774 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-09-01 10:17:21,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:17:22,578 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-09-01 10:17:22,578 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 10:17:22,673 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. [2023-09-01 10:17:22,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:17:22,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:17:22,688 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 10:17:22,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:17:22,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:17:22,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-09-01 10:17:23,482 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-09-01 10:17:23,482 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 10:17:23,539 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. [2023-09-01 10:17:23,693 INFO L119 LiptonReduction]: Number of co-enabled transitions 807240 [2023-09-01 10:18:32,716 WARN L222 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 235 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 10:18:41,722 WARN L222 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 235 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-09-01 10:18:51,166 WARN L222 SmtUtils]: Spent 6.65s 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) [2023-09-01 10:18:59,910 WARN L222 SmtUtils]: Spent 5.58s 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) [2023-09-01 10:19:02,752 INFO L134 LiptonReduction]: Checked pairs total: 1021771 [2023-09-01 10:19:02,752 INFO L136 LiptonReduction]: Total number of compositions: 1617 [2023-09-01 10:19:02,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 10:19:02,755 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;@e3d611, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 10:19:02,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-09-01 10:19:02,758 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2023-09-01 10:19:02,758 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 10:19:02,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 10:19:02,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 10:19:02,759 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)] === [2023-09-01 10:19:02,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 10:19:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1813057445, now seen corresponding path program 1 times [2023-09-01 10:19:02,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 10:19:02,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073889362] [2023-09-01 10:19:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 10:19:02,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 10:19:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 10:19:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 10:19:02,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 10:19:02,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073889362] [2023-09-01 10:19:02,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073889362] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 10:19:02,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 10:19:02,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 10:19:02,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765740187] [2023-09-01 10:19:02,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 10:19:02,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 10:19:02,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 10:19:02,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 10:19:02,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 10:19:02,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1625 out of 3342 [2023-09-01 10:19:02,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 339 transitions, 696 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) [2023-09-01 10:19:02,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 10:19:02,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1625 of 3342 [2023-09-01 10:19:02,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand