/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:54:50,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:54:50,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:54:50,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-27 23:54:50,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:54:50,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:54:50,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:54:50,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:54:50,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:54:50,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:54:50,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:54:50,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:54:50,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:54:50,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:54:50,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:54:50,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:54:50,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 23:54:50,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:54:50,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:54:50,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:54:50,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 23:54:50,094 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:54:50,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:54:50,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:54:50,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:54:50,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:54:50,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:54:50,096 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:54:50,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:54:50,096 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:54:50,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:54:50,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:54:50,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:54:50,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:54:50,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:54:50,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:54:50,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:54:50,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:54:50,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:54:50,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:54:50,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:54:50,098 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-27 23:54:50,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:54:50,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:54:50,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:54:50,283 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:54:50,283 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:54:50,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-01-27 23:54:51,209 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:54:51,451 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:54:51,452 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-01-27 23:54:51,462 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3508316d/7c75498793ec4881b5a1708d1015367f/FLAG1c4b6d7cb [2023-01-27 23:54:51,473 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3508316d/7c75498793ec4881b5a1708d1015367f [2023-01-27 23:54:51,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:54:51,476 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:54:51,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:54:51,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:54:51,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:54:51,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e255a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51, skipping insertion in model container [2023-01-27 23:54:51,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:54:51,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:54:51,660 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 23:54:51,809 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-atomic/read_write_lock-2.i[31244,31257] [2023-01-27 23:54:51,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:54:51,828 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:54:51,845 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 23:54:51,861 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-01-27 23:54:51,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:54:51,891 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 23:54:51,892 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 23:54:51,892 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 23:54:51,896 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:54:51,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51 WrapperNode [2023-01-27 23:54:51,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:54:51,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:54:51,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:54:51,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:54:51,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,956 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-01-27 23:54:51,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:54:51,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:54:51,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:54:51,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:54:51,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,973 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:54:51,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:54:51,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:54:51,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:54:51,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (1/1) ... [2023-01-27 23:54:51,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:54:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:54:52,002 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) [2023-01-27 23:54:52,003 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 [2023-01-27 23:54:52,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-01-27 23:54:52,030 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:54:52,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:54:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-01-27 23:54:52,031 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-01-27 23:54:52,031 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 23:54:52,146 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:54:52,147 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:54:52,280 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:54:52,300 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:54:52,300 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-01-27 23:54:52,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:54:52 BoogieIcfgContainer [2023-01-27 23:54:52,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:54:52,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:54:52,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:54:52,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:54:52,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:54:51" (1/3) ... [2023-01-27 23:54:52,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6ed5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:54:52, skipping insertion in model container [2023-01-27 23:54:52,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:54:51" (2/3) ... [2023-01-27 23:54:52,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6ed5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:54:52, skipping insertion in model container [2023-01-27 23:54:52,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:54:52" (3/3) ... [2023-01-27 23:54:52,314 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-01-27 23:54:52,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:54:52,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 23:54:52,327 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:54:52,401 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 23:54:52,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 110 transitions, 252 flow [2023-01-27 23:54:52,472 INFO L130 PetriNetUnfolder]: 2/106 cut-off events. [2023-01-27 23:54:52,472 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 23:54:52,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 106 events. 2/106 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2023-01-27 23:54:52,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 110 transitions, 252 flow [2023-01-27 23:54:52,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 93 transitions, 207 flow [2023-01-27 23:54:52,482 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:54:52,493 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 93 transitions, 207 flow [2023-01-27 23:54:52,495 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 93 transitions, 207 flow [2023-01-27 23:54:52,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 93 transitions, 207 flow [2023-01-27 23:54:52,514 INFO L130 PetriNetUnfolder]: 2/93 cut-off events. [2023-01-27 23:54:52,514 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 23:54:52,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 93 events. 2/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2023-01-27 23:54:52,516 INFO L119 LiptonReduction]: Number of co-enabled transitions 2574 [2023-01-27 23:54:54,477 INFO L134 LiptonReduction]: Checked pairs total: 8742 [2023-01-27 23:54:54,477 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-01-27 23:54:54,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:54:54,498 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@75d361e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:54:54,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 23:54:54,502 INFO L130 PetriNetUnfolder]: 0/18 cut-off events. [2023-01-27 23:54:54,502 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 23:54:54,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:54,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:54,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:54:54,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash -71968847, now seen corresponding path program 1 times [2023-01-27 23:54:54,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:54,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400385390] [2023-01-27 23:54:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:54,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:54,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:54,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400385390] [2023-01-27 23:54:54,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400385390] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:54:54,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:54:54,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:54:54,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319460804] [2023-01-27 23:54:54,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:54:54,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:54:54,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:54:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:54:54,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-01-27 23:54:54,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:54,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:54,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-01-27 23:54:54,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:56,195 INFO L130 PetriNetUnfolder]: 17327/24636 cut-off events. [2023-01-27 23:54:56,195 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-01-27 23:54:56,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50007 conditions, 24636 events. 17327/24636 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 144373 event pairs, 2851 based on Foata normal form. 0/23206 useless extension candidates. Maximal degree in co-relation 39272. Up to 11555 conditions per place. [2023-01-27 23:54:56,299 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 149 selfloop transitions, 26 changer transitions 4/180 dead transitions. [2023-01-27 23:54:56,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 180 transitions, 802 flow [2023-01-27 23:54:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:54:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:54:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 892 transitions. [2023-01-27 23:54:56,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762273901808785 [2023-01-27 23:54:56,312 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 892 transitions. [2023-01-27 23:54:56,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 892 transitions. [2023-01-27 23:54:56,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:56,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 892 transitions. [2023-01-27 23:54:56,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 99.11111111111111) internal successors, (892), 9 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:56,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:56,330 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:56,332 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 95 flow. Second operand 9 states and 892 transitions. [2023-01-27 23:54:56,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 180 transitions, 802 flow [2023-01-27 23:54:56,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 180 transitions, 752 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-27 23:54:56,351 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 223 flow [2023-01-27 23:54:56,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=223, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-01-27 23:54:56,355 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-01-27 23:54:56,355 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 223 flow [2023-01-27 23:54:56,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:56,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:56,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:56,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:54:56,356 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:54:56,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:56,358 INFO L85 PathProgramCache]: Analyzing trace with hash 993862366, now seen corresponding path program 1 times [2023-01-27 23:54:56,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:56,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629475076] [2023-01-27 23:54:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:56,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:56,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:56,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629475076] [2023-01-27 23:54:56,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629475076] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:54:56,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:54:56,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:54:56,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748996078] [2023-01-27 23:54:56,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:54:56,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:54:56,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:54:56,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:54:56,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2023-01-27 23:54:56,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:56,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:56,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2023-01-27 23:54:56,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:57,010 INFO L130 PetriNetUnfolder]: 4668/7927 cut-off events. [2023-01-27 23:54:57,010 INFO L131 PetriNetUnfolder]: For 2413/2672 co-relation queries the response was YES. [2023-01-27 23:54:57,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17959 conditions, 7927 events. 4668/7927 cut-off events. For 2413/2672 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 59509 event pairs, 1461 based on Foata normal form. 893/7913 useless extension candidates. Maximal degree in co-relation 13414. Up to 3478 conditions per place. [2023-01-27 23:54:57,046 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 46 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-01-27 23:54:57,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 384 flow [2023-01-27 23:54:57,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:54:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:54:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-01-27 23:54:57,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2023-01-27 23:54:57,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-01-27 23:54:57,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-01-27 23:54:57,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:57,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-01-27 23:54:57,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,050 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 223 flow. Second operand 3 states and 327 transitions. [2023-01-27 23:54:57,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 384 flow [2023-01-27 23:54:57,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 23:54:57,069 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 239 flow [2023-01-27 23:54:57,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2023-01-27 23:54:57,070 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-01-27 23:54:57,070 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 239 flow [2023-01-27 23:54:57,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:57,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:57,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:54:57,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:54:57,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:57,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1474564512, now seen corresponding path program 2 times [2023-01-27 23:54:57,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:57,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613478567] [2023-01-27 23:54:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:57,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:57,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:57,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613478567] [2023-01-27 23:54:57,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613478567] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:54:57,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:54:57,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:54:57,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922867270] [2023-01-27 23:54:57,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:54:57,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:54:57,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:57,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:54:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:54:57,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 172 [2023-01-27 23:54:57,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:57,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 172 [2023-01-27 23:54:57,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:57,482 INFO L130 PetriNetUnfolder]: 2096/4158 cut-off events. [2023-01-27 23:54:57,482 INFO L131 PetriNetUnfolder]: For 3420/3513 co-relation queries the response was YES. [2023-01-27 23:54:57,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10164 conditions, 4158 events. 2096/4158 cut-off events. For 3420/3513 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32302 event pairs, 491 based on Foata normal form. 473/4231 useless extension candidates. Maximal degree in co-relation 8741. Up to 1348 conditions per place. [2023-01-27 23:54:57,491 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 56 selfloop transitions, 7 changer transitions 16/110 dead transitions. [2023-01-27 23:54:57,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 110 transitions, 551 flow [2023-01-27 23:54:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:54:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:54:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2023-01-27 23:54:57,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366279069767442 [2023-01-27 23:54:57,492 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 438 transitions. [2023-01-27 23:54:57,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 438 transitions. [2023-01-27 23:54:57,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:57,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 438 transitions. [2023-01-27 23:54:57,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,495 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 239 flow. Second operand 4 states and 438 transitions. [2023-01-27 23:54:57,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 110 transitions, 551 flow [2023-01-27 23:54:57,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 23:54:57,500 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 281 flow [2023-01-27 23:54:57,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-01-27 23:54:57,501 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2023-01-27 23:54:57,501 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 281 flow [2023-01-27 23:54:57,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:57,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:57,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:54:57,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:54:57,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:57,502 INFO L85 PathProgramCache]: Analyzing trace with hash -941351057, now seen corresponding path program 1 times [2023-01-27 23:54:57,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:57,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941080994] [2023-01-27 23:54:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:57,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:57,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:57,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941080994] [2023-01-27 23:54:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941080994] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:54:57,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:54:57,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:54:57,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864312042] [2023-01-27 23:54:57,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:54:57,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:54:57,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:54:57,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:54:57,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-01-27 23:54:57,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:57,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:57,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-01-27 23:54:57,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:58,048 INFO L130 PetriNetUnfolder]: 4284/7435 cut-off events. [2023-01-27 23:54:58,048 INFO L131 PetriNetUnfolder]: For 6446/6446 co-relation queries the response was YES. [2023-01-27 23:54:58,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20646 conditions, 7435 events. 4284/7435 cut-off events. For 6446/6446 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 49272 event pairs, 685 based on Foata normal form. 0/7321 useless extension candidates. Maximal degree in co-relation 18489. Up to 2651 conditions per place. [2023-01-27 23:54:58,072 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 153 selfloop transitions, 43 changer transitions 38/234 dead transitions. [2023-01-27 23:54:58,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 1453 flow [2023-01-27 23:54:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:54:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:54:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 893 transitions. [2023-01-27 23:54:58,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768733850129198 [2023-01-27 23:54:58,077 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 893 transitions. [2023-01-27 23:54:58,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 893 transitions. [2023-01-27 23:54:58,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:58,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 893 transitions. [2023-01-27 23:54:58,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,087 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,087 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 281 flow. Second operand 9 states and 893 transitions. [2023-01-27 23:54:58,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 1453 flow [2023-01-27 23:54:58,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 234 transitions, 1437 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-01-27 23:54:58,102 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 620 flow [2023-01-27 23:54:58,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=620, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2023-01-27 23:54:58,103 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-01-27 23:54:58,103 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 620 flow [2023-01-27 23:54:58,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:58,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:58,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 23:54:58,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:54:58,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash 623683176, now seen corresponding path program 1 times [2023-01-27 23:54:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:58,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912387806] [2023-01-27 23:54:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912387806] [2023-01-27 23:54:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912387806] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:54:58,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:54:58,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:54:58,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50738909] [2023-01-27 23:54:58,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:54:58,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:54:58,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:54:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:54:58,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-01-27 23:54:58,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 620 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:58,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-01-27 23:54:58,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:58,658 INFO L130 PetriNetUnfolder]: 4028/7069 cut-off events. [2023-01-27 23:54:58,658 INFO L131 PetriNetUnfolder]: For 10167/10167 co-relation queries the response was YES. [2023-01-27 23:54:58,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23457 conditions, 7069 events. 4028/7069 cut-off events. For 10167/10167 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 46743 event pairs, 874 based on Foata normal form. 70/7139 useless extension candidates. Maximal degree in co-relation 21645. Up to 3013 conditions per place. [2023-01-27 23:54:58,686 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 134 selfloop transitions, 46 changer transitions 22/202 dead transitions. [2023-01-27 23:54:58,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 202 transitions, 1488 flow [2023-01-27 23:54:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 23:54:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 23:54:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 700 transitions. [2023-01-27 23:54:58,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2023-01-27 23:54:58,688 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 700 transitions. [2023-01-27 23:54:58,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 700 transitions. [2023-01-27 23:54:58,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:58,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 700 transitions. [2023-01-27 23:54:58,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,693 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,693 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 620 flow. Second operand 7 states and 700 transitions. [2023-01-27 23:54:58,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 202 transitions, 1488 flow [2023-01-27 23:54:58,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 202 transitions, 1486 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 23:54:58,739 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 790 flow [2023-01-27 23:54:58,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=790, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2023-01-27 23:54:58,740 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2023-01-27 23:54:58,740 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 790 flow [2023-01-27 23:54:58,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:58,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:58,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 23:54:58,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:54:58,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash 608950578, now seen corresponding path program 1 times [2023-01-27 23:54:58,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:58,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749385485] [2023-01-27 23:54:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:58,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:58,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:58,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749385485] [2023-01-27 23:54:58,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749385485] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:54:58,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:54:58,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:54:58,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807929017] [2023-01-27 23:54:58,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:54:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:54:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:54:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:54:58,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-01-27 23:54:58,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 790 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:58,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:58,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-01-27 23:54:58,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:59,295 INFO L130 PetriNetUnfolder]: 3495/6410 cut-off events. [2023-01-27 23:54:59,296 INFO L131 PetriNetUnfolder]: For 12073/12073 co-relation queries the response was YES. [2023-01-27 23:54:59,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22381 conditions, 6410 events. 3495/6410 cut-off events. For 12073/12073 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 44281 event pairs, 706 based on Foata normal form. 78/6488 useless extension candidates. Maximal degree in co-relation 20942. Up to 2422 conditions per place. [2023-01-27 23:54:59,323 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 140 selfloop transitions, 52 changer transitions 29/224 dead transitions. [2023-01-27 23:54:59,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 224 transitions, 1795 flow [2023-01-27 23:54:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:54:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:54:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 873 transitions. [2023-01-27 23:54:59,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563953488372093 [2023-01-27 23:54:59,325 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 873 transitions. [2023-01-27 23:54:59,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 873 transitions. [2023-01-27 23:54:59,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:59,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 873 transitions. [2023-01-27 23:54:59,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,329 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,329 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 790 flow. Second operand 9 states and 873 transitions. [2023-01-27 23:54:59,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 224 transitions, 1795 flow [2023-01-27 23:54:59,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 224 transitions, 1771 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:54:59,395 INFO L231 Difference]: Finished difference. Result has 95 places, 115 transitions, 972 flow [2023-01-27 23:54:59,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=972, PETRI_PLACES=95, PETRI_TRANSITIONS=115} [2023-01-27 23:54:59,396 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2023-01-27 23:54:59,396 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 115 transitions, 972 flow [2023-01-27 23:54:59,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:54:59,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:54:59,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 23:54:59,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:54:59,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:54:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1485191214, now seen corresponding path program 1 times [2023-01-27 23:54:59,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:54:59,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107717119] [2023-01-27 23:54:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:54:59,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:54:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:54:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:54:59,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:54:59,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107717119] [2023-01-27 23:54:59,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107717119] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:54:59,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:54:59,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-27 23:54:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940486552] [2023-01-27 23:54:59,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:54:59,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 23:54:59,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:54:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 23:54:59,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-27 23:54:59,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 172 [2023-01-27 23:54:59,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 115 transitions, 972 flow. Second operand has 7 states, 7 states have (on average 87.28571428571429) internal successors, (611), 7 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:54:59,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 172 [2023-01-27 23:54:59,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:54:59,933 INFO L130 PetriNetUnfolder]: 1906/4271 cut-off events. [2023-01-27 23:54:59,933 INFO L131 PetriNetUnfolder]: For 13271/13510 co-relation queries the response was YES. [2023-01-27 23:54:59,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15689 conditions, 4271 events. 1906/4271 cut-off events. For 13271/13510 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 34448 event pairs, 159 based on Foata normal form. 295/4546 useless extension candidates. Maximal degree in co-relation 14822. Up to 758 conditions per place. [2023-01-27 23:54:59,951 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 85 selfloop transitions, 15 changer transitions 51/205 dead transitions. [2023-01-27 23:54:59,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 205 transitions, 1677 flow [2023-01-27 23:54:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 23:54:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 23:54:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 972 transitions. [2023-01-27 23:54:59,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5651162790697675 [2023-01-27 23:54:59,953 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 972 transitions. [2023-01-27 23:54:59,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 972 transitions. [2023-01-27 23:54:59,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:54:59,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 972 transitions. [2023-01-27 23:54:59,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.2) internal successors, (972), 10 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 172.0) internal successors, (1892), 11 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,958 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 172.0) internal successors, (1892), 11 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:54:59,958 INFO L175 Difference]: Start difference. First operand has 95 places, 115 transitions, 972 flow. Second operand 10 states and 972 transitions. [2023-01-27 23:54:59,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 205 transitions, 1677 flow [2023-01-27 23:55:00,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 205 transitions, 1634 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-27 23:55:00,011 INFO L231 Difference]: Finished difference. Result has 104 places, 107 transitions, 885 flow [2023-01-27 23:55:00,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=885, PETRI_PLACES=104, PETRI_TRANSITIONS=107} [2023-01-27 23:55:00,011 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2023-01-27 23:55:00,011 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 107 transitions, 885 flow [2023-01-27 23:55:00,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 87.28571428571429) internal successors, (611), 7 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:55:00,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:55:00,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:55:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 23:55:00,013 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:55:00,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:55:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash -30174508, now seen corresponding path program 2 times [2023-01-27 23:55:00,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:55:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466493301] [2023-01-27 23:55:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:55:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:55:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 23:55:00,030 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 23:55:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 23:55:00,060 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 23:55:00,060 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 23:55:00,061 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-01-27 23:55:00,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-01-27 23:55:00,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-01-27 23:55:00,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-01-27 23:55:00,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-01-27 23:55:00,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-01-27 23:55:00,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-01-27 23:55:00,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 23:55:00,064 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-01-27 23:55:00,068 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:55:00,069 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:55:00,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:55:00 BasicIcfg [2023-01-27 23:55:00,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:55:00,118 INFO L158 Benchmark]: Toolchain (without parser) took 8642.65ms. Allocated memory was 362.8MB in the beginning and 968.9MB in the end (delta: 606.1MB). Free memory was 330.6MB in the beginning and 745.9MB in the end (delta: -415.3MB). Peak memory consumption was 192.6MB. Max. memory is 16.0GB. [2023-01-27 23:55:00,119 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory is still 213.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:55:00,119 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.45ms. Allocated memory is still 362.8MB. Free memory was 330.6MB in the beginning and 310.6MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-27 23:55:00,119 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.01ms. Allocated memory is still 362.8MB. Free memory was 310.6MB in the beginning and 308.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:55:00,119 INFO L158 Benchmark]: Boogie Preprocessor took 18.74ms. Allocated memory is still 362.8MB. Free memory was 308.4MB in the beginning and 306.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:55:00,120 INFO L158 Benchmark]: RCFGBuilder took 325.87ms. Allocated memory is still 362.8MB. Free memory was 306.8MB in the beginning and 290.9MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-27 23:55:00,122 INFO L158 Benchmark]: TraceAbstraction took 7814.54ms. Allocated memory was 362.8MB in the beginning and 968.9MB in the end (delta: 606.1MB). Free memory was 290.0MB in the beginning and 745.9MB in the end (delta: -455.8MB). Peak memory consumption was 150.7MB. Max. memory is 16.0GB. [2023-01-27 23:55:00,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory is still 213.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 420.45ms. Allocated memory is still 362.8MB. Free memory was 330.6MB in the beginning and 310.6MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 59.01ms. Allocated memory is still 362.8MB. Free memory was 310.6MB in the beginning and 308.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.74ms. Allocated memory is still 362.8MB. Free memory was 308.4MB in the beginning and 306.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 325.87ms. Allocated memory is still 362.8MB. Free memory was 306.8MB in the beginning and 290.9MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 7814.54ms. Allocated memory was 362.8MB in the beginning and 968.9MB in the end (delta: 606.1MB). Free memory was 290.0MB in the beginning and 745.9MB in the end (delta: -455.8MB). Peak memory consumption was 150.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 104 PlacesBefore, 50 PlacesAfterwards, 93 TransitionsBefore, 37 TransitionsAfterwards, 2574 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 2 ChoiceCompositions, 62 TotalNumberOfCompositions, 8742 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6068, independent: 5817, independent conditional: 0, independent unconditional: 5817, dependent: 251, dependent conditional: 0, dependent unconditional: 251, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1419, independent: 1380, independent conditional: 0, independent unconditional: 1380, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6068, independent: 4437, independent conditional: 0, independent unconditional: 4437, dependent: 212, dependent conditional: 0, dependent unconditional: 212, unknown: 1419, unknown conditional: 0, unknown unconditional: 1419] , Statistics on independence cache: Total cache size (in pairs): 275, Positive cache size: 254, Positive conditional cache size: 0, Positive unconditional cache size: 254, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-3, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-2, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=-1, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=0, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L743] 2 r = l [L745] 2 return 0; [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L727] 4 l = x VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L730] 4 y = l VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 135 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.6s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 624 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 624 mSDsluCounter, 107 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 45 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1622 IncrementalHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 62 mSDtfsCounter, 1622 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=972occurred in iteration=6, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 181 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-01-27 23:55:00,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...