/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-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 00:51:03,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 00:51:03,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 00:51:03,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 00:51:03,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 00:51:03,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 00:51:03,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 00:51:03,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 00:51:03,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 00:51:03,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 00:51:03,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 00:51:03,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 00:51:03,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 00:51:03,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 00:51:03,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 00:51:03,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 00:51:03,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 00:51:03,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 00:51:03,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 00:51:03,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 00:51:03,861 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 [2023-01-28 00:51:03,892 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 00:51:03,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 00:51:03,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 00:51:03,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 00:51:03,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 00:51:03,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 00:51:03,896 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 00:51:03,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 00:51:03,896 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 00:51:03,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 00:51:03,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 00:51:03,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 00:51:03,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 00:51:03,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 00:51:03,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 00:51:03,898 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 00:51:03,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 00:51:03,898 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 00:51:03,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 00:51:03,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 00:51:03,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 00:51:03,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 00:51:03,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 00:51:03,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 00:51:03,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 00:51:03,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 00:51:03,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 00:51:03,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 00:51:03,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 00:51:03,900 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 00:51:03,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 00:51:03,900 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 00:51:04,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 00:51:04,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 00:51:04,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 00:51:04,136 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 00:51:04,138 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 00:51:04,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-01-28 00:51:05,327 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 00:51:05,631 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 00:51:05,631 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-01-28 00:51:05,647 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52abc8a7e/f9bee8d775aa4933b984f0eead6118f9/FLAG14c8b5155 [2023-01-28 00:51:05,659 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52abc8a7e/f9bee8d775aa4933b984f0eead6118f9 [2023-01-28 00:51:05,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 00:51:05,662 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 00:51:05,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 00:51:05,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 00:51:05,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 00:51:05,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:51:05" (1/1) ... [2023-01-28 00:51:05,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ab5243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:05, skipping insertion in model container [2023-01-28 00:51:05,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:51:05" (1/1) ... [2023-01-28 00:51:05,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 00:51:05,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 00:51:06,300 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-01-28 00:51:06,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 00:51:06,319 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 00:51:06,396 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-01-28 00:51:06,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 00:51:06,468 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 00:51:06,468 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 00:51:06,474 INFO L208 MainTranslator]: Completed translation [2023-01-28 00:51:06,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06 WrapperNode [2023-01-28 00:51:06,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 00:51:06,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 00:51:06,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 00:51:06,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 00:51:06,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,545 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 283 [2023-01-28 00:51:06,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 00:51:06,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 00:51:06,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 00:51:06,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 00:51:06,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,582 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 00:51:06,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 00:51:06,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 00:51:06,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 00:51:06,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (1/1) ... [2023-01-28 00:51:06,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 00:51:06,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:51:06,617 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) [2023-01-28 00:51:06,649 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 [2023-01-28 00:51:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 00:51:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 00:51:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 00:51:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 00:51:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 00:51:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-01-28 00:51:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-01-28 00:51:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 00:51:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 00:51:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 00:51:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 00:51:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 00:51:06,673 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 00:51:06,972 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 00:51:06,973 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 00:51:07,334 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 00:51:07,384 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 00:51:07,385 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-01-28 00:51:07,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:51:07 BoogieIcfgContainer [2023-01-28 00:51:07,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 00:51:07,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 00:51:07,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 00:51:07,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 00:51:07,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 12:51:05" (1/3) ... [2023-01-28 00:51:07,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dafe3bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:51:07, skipping insertion in model container [2023-01-28 00:51:07,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:51:06" (2/3) ... [2023-01-28 00:51:07,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dafe3bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:51:07, skipping insertion in model container [2023-01-28 00:51:07,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:51:07" (3/3) ... [2023-01-28 00:51:07,394 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-01-28 00:51:07,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 00:51:07,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 00:51:07,409 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 00:51:07,538 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 00:51:07,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 248 transitions, 504 flow [2023-01-28 00:51:07,658 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2023-01-28 00:51:07,658 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 00:51:07,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 262 events. 19/262 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 413 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 182. Up to 4 conditions per place. [2023-01-28 00:51:07,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 248 transitions, 504 flow [2023-01-28 00:51:07,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 243 transitions, 491 flow [2023-01-28 00:51:07,680 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:51:07,698 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 243 transitions, 491 flow [2023-01-28 00:51:07,700 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 243 transitions, 491 flow [2023-01-28 00:51:07,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 243 transitions, 491 flow [2023-01-28 00:51:07,764 INFO L130 PetriNetUnfolder]: 18/257 cut-off events. [2023-01-28 00:51:07,764 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:51:07,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 257 events. 18/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 373 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 182. Up to 4 conditions per place. [2023-01-28 00:51:07,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 6520 [2023-01-28 00:51:14,247 INFO L134 LiptonReduction]: Checked pairs total: 6702 [2023-01-28 00:51:14,247 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-01-28 00:51:14,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:51:14,277 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;@b2e8c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:51:14,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:51:14,281 INFO L130 PetriNetUnfolder]: 1/14 cut-off events. [2023-01-28 00:51:14,282 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:51:14,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:51:14,283 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 00:51:14,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:51:14,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:51:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash -775278274, now seen corresponding path program 1 times [2023-01-28 00:51:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:51:14,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927364953] [2023-01-28 00:51:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:51:14,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:51:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:51:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 00:51:14,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:51:14,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927364953] [2023-01-28 00:51:14,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927364953] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 00:51:14,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 00:51:14,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 00:51:14,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371971305] [2023-01-28 00:51:14,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 00:51:14,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 00:51:14,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:51:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 00:51:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 00:51:14,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 490 [2023-01-28 00:51:14,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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) [2023-01-28 00:51:14,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:51:14,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 490 [2023-01-28 00:51:14,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:51:14,814 INFO L130 PetriNetUnfolder]: 82/169 cut-off events. [2023-01-28 00:51:14,814 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:51:14,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 169 events. 82/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 470 event pairs, 57 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2023-01-28 00:51:14,817 INFO L137 encePairwiseOnDemand]: 483/490 looper letters, 30 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-01-28 00:51:14,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 139 flow [2023-01-28 00:51:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 00:51:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 00:51:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-01-28 00:51:14,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2023-01-28 00:51:14,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-01-28 00:51:14,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-01-28 00:51:14,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:51:14,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-01-28 00:51:14,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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) [2023-01-28 00:51:14,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 00:51:14,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 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) [2023-01-28 00:51:14,864 INFO L175 Difference]: Start difference. First operand has 30 places, 37 transitions, 79 flow. Second operand 3 states and 695 transitions. [2023-01-28 00:51:14,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 139 flow [2023-01-28 00:51:14,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 00:51:14,868 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 81 flow [2023-01-28 00:51:14,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-01-28 00:51:14,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-01-28 00:51:14,873 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 81 flow [2023-01-28 00:51:14,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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) [2023-01-28 00:51:14,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:51:14,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 00:51:14,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 00:51:14,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:51:14,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:51:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1198421338, now seen corresponding path program 1 times [2023-01-28 00:51:14,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:51:14,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935094768] [2023-01-28 00:51:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:51:14,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:51:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:51:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 00:51:14,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:51:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935094768] [2023-01-28 00:51:14,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935094768] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 00:51:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599725925] [2023-01-28 00:51:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:51:14,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:51:14,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:51:14,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 00:51:15,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 00:51:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:51:15,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 00:51:15,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 00:51:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 00:51:15,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 00:51:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 00:51:15,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599725925] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 00:51:15,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 00:51:15,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-01-28 00:51:15,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476933023] [2023-01-28 00:51:15,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 00:51:15,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 00:51:15,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:51:15,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 00:51:15,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-01-28 00:51:15,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 490 [2023-01-28 00:51:15,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 81 flow. Second operand has 8 states, 8 states have (on average 220.5) internal successors, (1764), 8 states have internal predecessors, (1764), 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) [2023-01-28 00:51:15,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:51:15,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 490 [2023-01-28 00:51:15,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:51:15,384 INFO L130 PetriNetUnfolder]: 57/124 cut-off events. [2023-01-28 00:51:15,385 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:51:15,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 124 events. 57/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 300 event pairs, 38 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 249. Up to 121 conditions per place. [2023-01-28 00:51:15,386 INFO L137 encePairwiseOnDemand]: 487/490 looper letters, 30 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-01-28 00:51:15,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 151 flow [2023-01-28 00:51:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 00:51:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 00:51:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 910 transitions. [2023-01-28 00:51:15,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-01-28 00:51:15,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 910 transitions. [2023-01-28 00:51:15,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 910 transitions. [2023-01-28 00:51:15,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:51:15,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 910 transitions. [2023-01-28 00:51:15,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 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) [2023-01-28 00:51:15,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 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) [2023-01-28 00:51:15,396 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 490.0) internal successors, (2450), 5 states have internal predecessors, (2450), 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) [2023-01-28 00:51:15,396 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 81 flow. Second operand 4 states and 910 transitions. [2023-01-28 00:51:15,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 151 flow [2023-01-28 00:51:15,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 147 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 00:51:15,398 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 93 flow [2023-01-28 00:51:15,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-01-28 00:51:15,399 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-01-28 00:51:15,399 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 93 flow [2023-01-28 00:51:15,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 220.5) internal successors, (1764), 8 states have internal predecessors, (1764), 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) [2023-01-28 00:51:15,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:51:15,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-01-28 00:51:15,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 00:51:15,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:51:15,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:51:15,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:51:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1430954434, now seen corresponding path program 2 times [2023-01-28 00:51:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:51:15,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428909443] [2023-01-28 00:51:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:51:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:51:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:51:15,650 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:51:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:51:15,715 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:51:15,718 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:51:15,720 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:51:15,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 00:51:15,721 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-01-28 00:51:15,726 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:51:15,728 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:51:15,729 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 00:51:15,810 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 00:51:15,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 413 transitions, 844 flow [2023-01-28 00:51:15,894 INFO L130 PetriNetUnfolder]: 36/463 cut-off events. [2023-01-28 00:51:15,895 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 00:51:15,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 463 events. 36/463 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1452 event pairs, 0 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 358. Up to 8 conditions per place. [2023-01-28 00:51:15,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 388 places, 413 transitions, 844 flow [2023-01-28 00:51:15,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 388 places, 413 transitions, 844 flow [2023-01-28 00:51:15,908 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:51:15,908 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 388 places, 413 transitions, 844 flow [2023-01-28 00:51:15,909 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 388 places, 413 transitions, 844 flow [2023-01-28 00:51:15,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 413 transitions, 844 flow [2023-01-28 00:51:15,985 INFO L130 PetriNetUnfolder]: 36/463 cut-off events. [2023-01-28 00:51:15,986 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 00:51:15,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 463 events. 36/463 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1452 event pairs, 0 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 358. Up to 8 conditions per place. [2023-01-28 00:51:16,022 INFO L119 LiptonReduction]: Number of co-enabled transitions 69764 [2023-01-28 00:51:24,878 INFO L134 LiptonReduction]: Checked pairs total: 82796 [2023-01-28 00:51:24,879 INFO L136 LiptonReduction]: Total number of compositions: 396 [2023-01-28 00:51:24,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:51:24,881 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;@b2e8c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:51:24,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:51:24,887 INFO L130 PetriNetUnfolder]: 5/45 cut-off events. [2023-01-28 00:51:24,887 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 00:51:24,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:51:24,887 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 00:51:24,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:51:24,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:51:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1270343773, now seen corresponding path program 1 times [2023-01-28 00:51:24,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:51:24,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863664982] [2023-01-28 00:51:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:51:24,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:51:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:51:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 00:51:25,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:51:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863664982] [2023-01-28 00:51:25,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863664982] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 00:51:25,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 00:51:25,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 00:51:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130248293] [2023-01-28 00:51:25,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 00:51:25,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 00:51:25,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:51:25,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 00:51:25,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 00:51:25,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 809 [2023-01-28 00:51:25,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 81 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 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) [2023-01-28 00:51:25,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:51:25,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 809 [2023-01-28 00:51:25,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:51:26,220 INFO L130 PetriNetUnfolder]: 8425/12461 cut-off events. [2023-01-28 00:51:26,221 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2023-01-28 00:51:26,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24907 conditions, 12461 events. 8425/12461 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 68317 event pairs, 6567 based on Foata normal form. 0/9028 useless extension candidates. Maximal degree in co-relation 20102. Up to 12304 conditions per place. [2023-01-28 00:51:26,258 INFO L137 encePairwiseOnDemand]: 801/809 looper letters, 65 selfloop transitions, 2 changer transitions 7/77 dead transitions. [2023-01-28 00:51:26,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 318 flow [2023-01-28 00:51:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 00:51:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 00:51:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1186 transitions. [2023-01-28 00:51:26,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48866913885455293 [2023-01-28 00:51:26,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1186 transitions. [2023-01-28 00:51:26,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1186 transitions. [2023-01-28 00:51:26,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:51:26,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1186 transitions. [2023-01-28 00:51:26,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 395.3333333333333) internal successors, (1186), 3 states have internal predecessors, (1186), 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) [2023-01-28 00:51:26,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 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) [2023-01-28 00:51:26,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 809.0) internal successors, (3236), 4 states have internal predecessors, (3236), 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) [2023-01-28 00:51:26,278 INFO L175 Difference]: Start difference. First operand has 66 places, 81 transitions, 180 flow. Second operand 3 states and 1186 transitions. [2023-01-28 00:51:26,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 318 flow [2023-01-28 00:51:26,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 00:51:26,283 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 162 flow [2023-01-28 00:51:26,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=809, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-01-28 00:51:26,285 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-01-28 00:51:26,285 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 162 flow [2023-01-28 00:51:26,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 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) [2023-01-28 00:51:26,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:51:26,286 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 00:51:26,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 00:51:26,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:51:26,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:51:26,287 INFO L85 PathProgramCache]: Analyzing trace with hash -190819178, now seen corresponding path program 1 times [2023-01-28 00:51:26,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:51:26,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057052302] [2023-01-28 00:51:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:51:26,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:51:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:51:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 00:51:26,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:51:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057052302] [2023-01-28 00:51:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057052302] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 00:51:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765164736] [2023-01-28 00:51:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:51:26,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:51:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:51:26,533 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 00:51:26,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 00:51:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:51:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 00:51:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 00:51:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 00:51:26,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 00:51:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 00:51:26,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765164736] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 00:51:26,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 00:51:26,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-01-28 00:51:26,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733000476] [2023-01-28 00:51:26,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 00:51:26,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 00:51:26,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:51:26,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 00:51:26,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-01-28 00:51:26,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 809 [2023-01-28 00:51:26,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 370.625) internal successors, (2965), 8 states have internal predecessors, (2965), 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) [2023-01-28 00:51:26,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:51:26,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 809 [2023-01-28 00:51:26,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:51:27,415 INFO L130 PetriNetUnfolder]: 3827/5775 cut-off events. [2023-01-28 00:51:27,416 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2023-01-28 00:51:27,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11581 conditions, 5775 events. 3827/5775 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 29632 event pairs, 2926 based on Foata normal form. 0/4714 useless extension candidates. Maximal degree in co-relation 11568. Up to 5706 conditions per place. [2023-01-28 00:51:27,445 INFO L137 encePairwiseOnDemand]: 806/809 looper letters, 65 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-01-28 00:51:27,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 302 flow [2023-01-28 00:51:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 00:51:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 00:51:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1545 transitions. [2023-01-28 00:51:27,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774412855377009 [2023-01-28 00:51:27,450 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1545 transitions. [2023-01-28 00:51:27,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1545 transitions. [2023-01-28 00:51:27,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:51:27,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1545 transitions. [2023-01-28 00:51:27,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 386.25) internal successors, (1545), 4 states have internal predecessors, (1545), 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) [2023-01-28 00:51:27,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 809.0) internal successors, (4045), 5 states have internal predecessors, (4045), 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) [2023-01-28 00:51:27,461 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 809.0) internal successors, (4045), 5 states have internal predecessors, (4045), 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) [2023-01-28 00:51:27,461 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 162 flow. Second operand 4 states and 1545 transitions. [2023-01-28 00:51:27,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 302 flow [2023-01-28 00:51:27,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 71 transitions, 296 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 00:51:27,463 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 172 flow [2023-01-28 00:51:27,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=809, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2023-01-28 00:51:27,464 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-01-28 00:51:27,464 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 172 flow [2023-01-28 00:51:27,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 370.625) internal successors, (2965), 8 states have internal predecessors, (2965), 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) [2023-01-28 00:51:27,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:51:27,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 00:51:27,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 00:51:27,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:51:27,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:51:27,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:51:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1757769597, now seen corresponding path program 2 times [2023-01-28 00:51:27,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:51:27,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396730871] [2023-01-28 00:51:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:51:27,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:51:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:51:27,727 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:51:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:51:27,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:51:27,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:51:27,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:51:27,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 00:51:27,771 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-01-28 00:51:27,772 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:51:27,772 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:51:27,772 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 00:51:27,836 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 00:51:27,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 578 transitions, 1186 flow [2023-01-28 00:51:28,027 INFO L130 PetriNetUnfolder]: 58/691 cut-off events. [2023-01-28 00:51:28,028 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 00:51:28,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 691 events. 58/691 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2904 event pairs, 1 based on Foata normal form. 0/626 useless extension candidates. Maximal degree in co-relation 549. Up to 16 conditions per place. [2023-01-28 00:51:28,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 542 places, 578 transitions, 1186 flow [2023-01-28 00:51:28,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 542 places, 578 transitions, 1186 flow [2023-01-28 00:51:28,042 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:51:28,042 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 542 places, 578 transitions, 1186 flow [2023-01-28 00:51:28,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 542 places, 578 transitions, 1186 flow [2023-01-28 00:51:28,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 578 transitions, 1186 flow [2023-01-28 00:51:28,191 INFO L130 PetriNetUnfolder]: 58/691 cut-off events. [2023-01-28 00:51:28,192 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 00:51:28,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 691 events. 58/691 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2904 event pairs, 1 based on Foata normal form. 0/626 useless extension candidates. Maximal degree in co-relation 549. Up to 16 conditions per place. [2023-01-28 00:51:28,256 INFO L119 LiptonReduction]: Number of co-enabled transitions 185820 [2023-01-28 00:51:39,058 INFO L134 LiptonReduction]: Checked pairs total: 211500 [2023-01-28 00:51:39,058 INFO L136 LiptonReduction]: Total number of compositions: 551 [2023-01-28 00:51:39,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:51:39,060 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;@b2e8c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:51:39,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:51:39,068 INFO L130 PetriNetUnfolder]: 17/94 cut-off events. [2023-01-28 00:51:39,068 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 00:51:39,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:51:39,068 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 00:51:39,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:51:39,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:51:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 698955491, now seen corresponding path program 1 times [2023-01-28 00:51:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:51:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521262921] [2023-01-28 00:51:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:51:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:51:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:51:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 00:51:39,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:51:39,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521262921] [2023-01-28 00:51:39,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521262921] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 00:51:39,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 00:51:39,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 00:51:39,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842369161] [2023-01-28 00:51:39,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 00:51:39,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 00:51:39,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:51:39,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 00:51:39,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 00:51:39,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 519 out of 1129 [2023-01-28 00:51:39,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 521.3333333333334) internal successors, (1564), 3 states have internal predecessors, (1564), 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) [2023-01-28 00:51:39,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:51:39,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 519 of 1129 [2023-01-28 00:51:39,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:52:07,614 INFO L130 PetriNetUnfolder]: 332985/433383 cut-off events. [2023-01-28 00:52:07,614 INFO L131 PetriNetUnfolder]: For 9466/9466 co-relation queries the response was YES. [2023-01-28 00:52:08,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870690 conditions, 433383 events. 332985/433383 cut-off events. For 9466/9466 co-relation queries the response was YES. Maximal size of possible extension queue 7295. Compared 2708991 event pairs, 262039 based on Foata normal form. 0/318877 useless extension candidates. Maximal degree in co-relation 188798. Up to 432539 conditions per place. [2023-01-28 00:52:09,264 INFO L137 encePairwiseOnDemand]: 1117/1129 looper letters, 96 selfloop transitions, 2 changer transitions 8/108 dead transitions. [2023-01-28 00:52:09,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 108 transitions, 456 flow [2023-01-28 00:52:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 00:52:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 00:52:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1672 transitions. [2023-01-28 00:52:09,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49365219958665485 [2023-01-28 00:52:09,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1672 transitions. [2023-01-28 00:52:09,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1672 transitions. [2023-01-28 00:52:09,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:52:09,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1672 transitions. [2023-01-28 00:52:09,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 557.3333333333334) internal successors, (1672), 3 states have internal predecessors, (1672), 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) [2023-01-28 00:52:09,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-01-28 00:52:09,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 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) [2023-01-28 00:52:09,282 INFO L175 Difference]: Start difference. First operand has 92 places, 116 transitions, 262 flow. Second operand 3 states and 1672 transitions. [2023-01-28 00:52:09,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 108 transitions, 456 flow [2023-01-28 00:52:09,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 108 transitions, 456 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 00:52:09,289 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 231 flow [2023-01-28 00:52:09,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2023-01-28 00:52:09,291 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2023-01-28 00:52:09,291 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 231 flow [2023-01-28 00:52:09,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 521.3333333333334) internal successors, (1564), 3 states have internal predecessors, (1564), 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) [2023-01-28 00:52:09,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:52:09,292 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:52:09,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 00:52:09,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:52:09,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:52:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1296553055, now seen corresponding path program 1 times [2023-01-28 00:52:09,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:52:09,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272863277] [2023-01-28 00:52:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:52:09,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:52:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:52:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 00:52:09,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:52:09,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272863277] [2023-01-28 00:52:09,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272863277] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 00:52:09,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217805847] [2023-01-28 00:52:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:52:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:52:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:52:09,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 00:52:09,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 00:52:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:52:09,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 00:52:09,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 00:52:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 00:52:09,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 00:52:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 00:52:09,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217805847] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 00:52:09,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 00:52:09,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 00:52:09,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498428875] [2023-01-28 00:52:09,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 00:52:09,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 00:52:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:52:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 00:52:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-01-28 00:52:09,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 519 out of 1129 [2023-01-28 00:52:09,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 231 flow. Second operand has 7 states, 7 states have (on average 520.8571428571429) internal successors, (3646), 7 states have internal predecessors, (3646), 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) [2023-01-28 00:52:09,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:52:09,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 519 of 1129 [2023-01-28 00:52:09,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:52:22,363 INFO L130 PetriNetUnfolder]: 151967/199068 cut-off events. [2023-01-28 00:52:22,363 INFO L131 PetriNetUnfolder]: For 4018/4018 co-relation queries the response was YES. [2023-01-28 00:52:22,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400790 conditions, 199068 events. 151967/199068 cut-off events. For 4018/4018 co-relation queries the response was YES. Maximal size of possible extension queue 3866. Compared 1191619 event pairs, 118198 based on Foata normal form. 0/159670 useless extension candidates. Maximal degree in co-relation 400776. Up to 198921 conditions per place. [2023-01-28 00:52:23,326 INFO L137 encePairwiseOnDemand]: 1126/1129 looper letters, 96 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2023-01-28 00:52:23,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 101 transitions, 433 flow [2023-01-28 00:52:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 00:52:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 00:52:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2176 transitions. [2023-01-28 00:52:23,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818423383525244 [2023-01-28 00:52:23,332 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2176 transitions. [2023-01-28 00:52:23,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2176 transitions. [2023-01-28 00:52:23,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:52:23,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2176 transitions. [2023-01-28 00:52:23,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 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) [2023-01-28 00:52:23,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1129.0) internal successors, (5645), 5 states have internal predecessors, (5645), 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) [2023-01-28 00:52:23,344 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1129.0) internal successors, (5645), 5 states have internal predecessors, (5645), 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) [2023-01-28 00:52:23,344 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 231 flow. Second operand 4 states and 2176 transitions. [2023-01-28 00:52:23,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 101 transitions, 433 flow [2023-01-28 00:52:23,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 423 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 00:52:23,349 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 237 flow [2023-01-28 00:52:23,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2023-01-28 00:52:23,350 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 1 predicate places. [2023-01-28 00:52:23,350 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 237 flow [2023-01-28 00:52:23,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 520.8571428571429) internal successors, (3646), 7 states have internal predecessors, (3646), 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) [2023-01-28 00:52:23,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:52:23,351 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 00:52:23,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 00:52:23,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:52:23,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:52:23,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:52:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1652758941, now seen corresponding path program 2 times [2023-01-28 00:52:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:52:23,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730507953] [2023-01-28 00:52:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:52:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:52:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:52:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 00:52:23,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:52:23,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730507953] [2023-01-28 00:52:23,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730507953] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 00:52:23,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440442558] [2023-01-28 00:52:23,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 00:52:23,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:52:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:52:23,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 00:52:23,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 00:52:23,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 00:52:23,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 00:52:23,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 00:52:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 00:52:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 00:52:23,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 00:52:23,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440442558] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 00:52:23,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 00:52:23,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-01-28 00:52:23,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552813384] [2023-01-28 00:52:23,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 00:52:23,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 00:52:23,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:52:23,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 00:52:23,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-01-28 00:52:23,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 516 out of 1129 [2023-01-28 00:52:23,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 518.1666666666666) internal successors, (3109), 6 states have internal predecessors, (3109), 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) [2023-01-28 00:52:23,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:52:23,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 516 of 1129 [2023-01-28 00:52:23,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 00:52:31,194 INFO L130 PetriNetUnfolder]: 97842/130448 cut-off events. [2023-01-28 00:52:31,194 INFO L131 PetriNetUnfolder]: For 650/650 co-relation queries the response was YES. [2023-01-28 00:52:31,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262215 conditions, 130448 events. 97842/130448 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 2914. Compared 768574 event pairs, 0 based on Foata normal form. 15000/118825 useless extension candidates. Maximal degree in co-relation 262195. Up to 69125 conditions per place. [2023-01-28 00:52:31,582 INFO L137 encePairwiseOnDemand]: 1126/1129 looper letters, 0 selfloop transitions, 0 changer transitions 283/283 dead transitions. [2023-01-28 00:52:31,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 283 transitions, 1163 flow [2023-01-28 00:52:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 00:52:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 00:52:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3377 transitions. [2023-01-28 00:52:31,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49852376734573367 [2023-01-28 00:52:31,589 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3377 transitions. [2023-01-28 00:52:31,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3377 transitions. [2023-01-28 00:52:31,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 00:52:31,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3377 transitions. [2023-01-28 00:52:31,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 562.8333333333334) internal successors, (3377), 6 states have internal predecessors, (3377), 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) [2023-01-28 00:52:31,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1129.0) internal successors, (7903), 7 states have internal predecessors, (7903), 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) [2023-01-28 00:52:31,606 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1129.0) internal successors, (7903), 7 states have internal predecessors, (7903), 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) [2023-01-28 00:52:31,606 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 237 flow. Second operand 6 states and 3377 transitions. [2023-01-28 00:52:31,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 283 transitions, 1163 flow [2023-01-28 00:52:31,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 283 transitions, 1154 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-28 00:52:31,702 INFO L231 Difference]: Finished difference. Result has 94 places, 0 transitions, 0 flow [2023-01-28 00:52:31,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=94, PETRI_TRANSITIONS=0} [2023-01-28 00:52:31,703 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2023-01-28 00:52:31,703 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 0 transitions, 0 flow [2023-01-28 00:52:31,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 518.1666666666666) internal successors, (3109), 6 states have internal predecessors, (3109), 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) [2023-01-28 00:52:31,704 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:52:31,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 00:52:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 00:52:31,910 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-01-28 00:52:31,910 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-01-28 00:52:31,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 578 transitions, 1186 flow [2023-01-28 00:52:32,063 INFO L130 PetriNetUnfolder]: 58/691 cut-off events. [2023-01-28 00:52:32,063 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 00:52:32,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 691 events. 58/691 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2904 event pairs, 1 based on Foata normal form. 0/626 useless extension candidates. Maximal degree in co-relation 549. Up to 16 conditions per place. [2023-01-28 00:52:32,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 542 places, 578 transitions, 1186 flow [2023-01-28 00:52:32,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 542 places, 578 transitions, 1186 flow [2023-01-28 00:52:32,083 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:52:32,083 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 542 places, 578 transitions, 1186 flow [2023-01-28 00:52:32,083 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 542 places, 578 transitions, 1186 flow [2023-01-28 00:52:32,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 578 transitions, 1186 flow [2023-01-28 00:52:32,234 INFO L130 PetriNetUnfolder]: 58/691 cut-off events. [2023-01-28 00:52:32,234 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 00:52:32,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 691 events. 58/691 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2904 event pairs, 1 based on Foata normal form. 0/626 useless extension candidates. Maximal degree in co-relation 549. Up to 16 conditions per place. [2023-01-28 00:52:32,297 INFO L119 LiptonReduction]: Number of co-enabled transitions 185820 [2023-01-28 00:52:43,639 INFO L134 LiptonReduction]: Checked pairs total: 200067 [2023-01-28 00:52:43,640 INFO L136 LiptonReduction]: Total number of compositions: 544 [2023-01-28 00:52:43,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 00:52:43,641 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;@b2e8c8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:52:43,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 00:52:43,643 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2023-01-28 00:52:43,643 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 00:52:43,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:52:43,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:52:43,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 00:52:43,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:52:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1517659047, now seen corresponding path program 1 times [2023-01-28 00:52:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:52:43,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380828466] [2023-01-28 00:52:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:52:43,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:52:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 00:52:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 00:52:43,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 00:52:43,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380828466] [2023-01-28 00:52:43,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380828466] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 00:52:43,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 00:52:43,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 00:52:43,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646042326] [2023-01-28 00:52:43,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 00:52:43,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 00:52:43,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 00:52:43,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 00:52:43,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 00:52:43,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 519 out of 1122 [2023-01-28 00:52:43,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 118 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 521.6666666666666) internal successors, (1565), 3 states have internal predecessors, (1565), 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) [2023-01-28 00:52:43,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 00:52:43,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 519 of 1122 [2023-01-28 00:52:43,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand