/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 AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 08:13:17,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 08:13:17,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 08:13:17,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 08:13:17,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 08:13:17,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 08:13:17,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 08:13:17,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 08:13:17,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 08:13:17,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 08:13:17,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 08:13:17,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 08:13:17,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 08:13:17,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 08:13:17,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 08:13:17,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 08:13:17,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 08:13:17,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 08:13:17,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 08:13:17,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 08:13:17,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 08:13:17,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 08:13:17,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 08:13:17,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 08:13:17,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 08:13:17,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 08:13:17,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 08:13:17,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 08:13:17,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 08:13:17,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 08:13:17,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 08:13:17,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 08:13:17,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 08:13:17,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 08:13:17,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 08:13:17,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 08:13:17,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 08:13:17,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 08:13:17,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 08:13:17,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 08:13:17,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 08:13:17,697 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 08:13:17,720 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 08:13:17,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 08:13:17,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 08:13:17,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 08:13:17,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 08:13:17,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 08:13:17,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 08:13:17,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 08:13:17,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 08:13:17,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 08:13:17,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 08:13:17,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 08:13:17,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 08:13:17,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 08:13:17,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 08:13:17,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 08:13:17,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 08:13:17,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 08:13:17,723 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 08:13:17,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 08:13:17,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 08:13:17,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 08:13:17,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 08:13:17,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 08:13:17,902 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 08:13:17,902 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 08:13:17,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-01-28 08:13:18,788 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 08:13:19,096 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 08:13:19,096 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-01-28 08:13:19,111 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c862deeaf/b013e168802d4297aa7946ed722a54b1/FLAG854b7f57a [2023-01-28 08:13:19,125 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c862deeaf/b013e168802d4297aa7946ed722a54b1 [2023-01-28 08:13:19,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 08:13:19,127 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 08:13:19,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 08:13:19,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 08:13:19,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 08:13:19,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd7fbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19, skipping insertion in model container [2023-01-28 08:13:19,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 08:13:19,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 08:13:19,543 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2023-01-28 08:13:19,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 08:13:19,589 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 08:13:19,619 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2023-01-28 08:13:19,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 08:13:19,692 INFO L208 MainTranslator]: Completed translation [2023-01-28 08:13:19,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19 WrapperNode [2023-01-28 08:13:19,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 08:13:19,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 08:13:19,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 08:13:19,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 08:13:19,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,748 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2023-01-28 08:13:19,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 08:13:19,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 08:13:19,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 08:13:19,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 08:13:19,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,775 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 08:13:19,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 08:13:19,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 08:13:19,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 08:13:19,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (1/1) ... [2023-01-28 08:13:19,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 08:13:19,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:13:19,811 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 08:13:19,824 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 08:13:19,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 08:13:19,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-01-28 08:13:19,836 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-01-28 08:13:19,836 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-01-28 08:13:19,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 08:13:19,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 08:13:19,836 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-01-28 08:13:19,836 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-01-28 08:13:19,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 08:13:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 08:13:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 08:13:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 08:13:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-01-28 08:13:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 08:13:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 08:13:19,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 08:13:19,838 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 08:13:19,957 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 08:13:19,973 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 08:13:20,181 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 08:13:20,187 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 08:13:20,187 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-01-28 08:13:20,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:13:20 BoogieIcfgContainer [2023-01-28 08:13:20,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 08:13:20,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 08:13:20,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 08:13:20,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 08:13:20,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 08:13:19" (1/3) ... [2023-01-28 08:13:20,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38abcffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 08:13:20, skipping insertion in model container [2023-01-28 08:13:20,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:13:19" (2/3) ... [2023-01-28 08:13:20,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38abcffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 08:13:20, skipping insertion in model container [2023-01-28 08:13:20,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:13:20" (3/3) ... [2023-01-28 08:13:20,195 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2023-01-28 08:13:20,206 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 08:13:20,206 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 08:13:20,206 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 08:13:20,287 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 08:13:20,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 210 transitions, 442 flow [2023-01-28 08:13:20,396 INFO L130 PetriNetUnfolder]: 52/402 cut-off events. [2023-01-28 08:13:20,396 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-01-28 08:13:20,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 402 events. 52/402 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1594 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-01-28 08:13:20,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 210 transitions, 442 flow [2023-01-28 08:13:20,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 207 transitions, 428 flow [2023-01-28 08:13:20,409 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:13:20,414 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 207 transitions, 428 flow [2023-01-28 08:13:20,416 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 207 transitions, 428 flow [2023-01-28 08:13:20,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 207 transitions, 428 flow [2023-01-28 08:13:20,452 INFO L130 PetriNetUnfolder]: 48/389 cut-off events. [2023-01-28 08:13:20,452 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 08:13:20,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 389 events. 48/389 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1505 event pairs, 0 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 194. Up to 8 conditions per place. [2023-01-28 08:13:20,460 INFO L119 LiptonReduction]: Number of co-enabled transitions 12890 [2023-01-28 08:13:25,582 INFO L134 LiptonReduction]: Checked pairs total: 23053 [2023-01-28 08:13:25,583 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-01-28 08:13:25,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:13:25,596 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;@4974cb94, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:13:25,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 08:13:25,601 INFO L130 PetriNetUnfolder]: 7/67 cut-off events. [2023-01-28 08:13:25,601 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:13:25,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:25,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:13:25,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:13:25,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:25,605 INFO L85 PathProgramCache]: Analyzing trace with hash -139620747, now seen corresponding path program 1 times [2023-01-28 08:13:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747084895] [2023-01-28 08:13:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:25,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:25,851 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 08:13:25,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:13:25,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747084895] [2023-01-28 08:13:25,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747084895] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:13:25,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:13:25,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:13:25,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361476187] [2023-01-28 08:13:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:13:25,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:13:25,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:13:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:13:25,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:13:25,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 377 [2023-01-28 08:13:25,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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 08:13:25,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:13:25,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 377 [2023-01-28 08:13:25,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:13:26,250 INFO L130 PetriNetUnfolder]: 2281/3886 cut-off events. [2023-01-28 08:13:26,250 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-01-28 08:13:26,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7523 conditions, 3886 events. 2281/3886 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 21980 event pairs, 1943 based on Foata normal form. 284/3504 useless extension candidates. Maximal degree in co-relation 6827. Up to 3567 conditions per place. [2023-01-28 08:13:26,261 INFO L137 encePairwiseOnDemand]: 363/377 looper letters, 35 selfloop transitions, 2 changer transitions 15/56 dead transitions. [2023-01-28 08:13:26,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 224 flow [2023-01-28 08:13:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:13:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:13:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-01-28 08:13:26,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5313881520778072 [2023-01-28 08:13:26,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-01-28 08:13:26,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-01-28 08:13:26,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:13:26,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-01-28 08:13:26,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 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 08:13:26,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 08:13:26,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 08:13:26,288 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 134 flow. Second operand 3 states and 601 transitions. [2023-01-28 08:13:26,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 224 flow [2023-01-28 08:13:26,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:13:26,294 INFO L231 Difference]: Finished difference. Result has 52 places, 35 transitions, 89 flow [2023-01-28 08:13:26,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=52, PETRI_TRANSITIONS=35} [2023-01-28 08:13:26,298 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-01-28 08:13:26,298 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 35 transitions, 89 flow [2023-01-28 08:13:26,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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 08:13:26,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:26,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:13:26,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 08:13:26,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:13:26,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash 66358163, now seen corresponding path program 1 times [2023-01-28 08:13:26,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:26,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639129973] [2023-01-28 08:13:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:26,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:13:26,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:13:26,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639129973] [2023-01-28 08:13:26,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639129973] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:13:26,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76272543] [2023-01-28 08:13:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:26,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:13:26,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:13:26,430 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 08:13:26,434 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 08:13:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 08:13:26,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:13:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:13:26,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:13:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:13:26,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76272543] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:13:26,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:13:26,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 08:13:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272376346] [2023-01-28 08:13:26,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:13:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 08:13:26,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:13:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 08:13:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 08:13:26,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 377 [2023-01-28 08:13:26,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 35 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 183.14285714285714) internal successors, (1282), 7 states have internal predecessors, (1282), 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 08:13:26,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:13:26,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 377 [2023-01-28 08:13:26,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:13:26,658 INFO L130 PetriNetUnfolder]: 12/37 cut-off events. [2023-01-28 08:13:26,658 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 08:13:26,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 37 events. 12/37 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 1 based on Foata normal form. 7/44 useless extension candidates. Maximal degree in co-relation 88. Up to 26 conditions per place. [2023-01-28 08:13:26,658 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-01-28 08:13:26,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 19 transitions, 80 flow [2023-01-28 08:13:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:13:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:13:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 738 transitions. [2023-01-28 08:13:26,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48938992042440316 [2023-01-28 08:13:26,660 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 738 transitions. [2023-01-28 08:13:26,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 738 transitions. [2023-01-28 08:13:26,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:13:26,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 738 transitions. [2023-01-28 08:13:26,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 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 08:13:26,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 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 08:13:26,664 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 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 08:13:26,664 INFO L175 Difference]: Start difference. First operand has 52 places, 35 transitions, 89 flow. Second operand 4 states and 738 transitions. [2023-01-28 08:13:26,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 19 transitions, 80 flow [2023-01-28 08:13:26,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 19 transitions, 74 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 08:13:26,665 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-01-28 08:13:26,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-01-28 08:13:26,666 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -32 predicate places. [2023-01-28 08:13:26,666 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-01-28 08:13:26,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.14285714285714) internal successors, (1282), 7 states have internal predecessors, (1282), 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 08:13:26,668 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 08:13:26,669 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-28 08:13:26,688 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 08:13:26,869 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 08:13:26,870 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 08:13:26,871 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-01-28 08:13:26,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 210 transitions, 442 flow [2023-01-28 08:13:26,899 INFO L130 PetriNetUnfolder]: 52/402 cut-off events. [2023-01-28 08:13:26,899 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-01-28 08:13:26,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 402 events. 52/402 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1594 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-01-28 08:13:26,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 210 transitions, 442 flow [2023-01-28 08:13:26,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 208 transitions, 432 flow [2023-01-28 08:13:26,902 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:13:26,902 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 208 transitions, 432 flow [2023-01-28 08:13:26,902 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 208 transitions, 432 flow [2023-01-28 08:13:26,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 208 transitions, 432 flow [2023-01-28 08:13:26,922 INFO L130 PetriNetUnfolder]: 48/390 cut-off events. [2023-01-28 08:13:26,922 INFO L131 PetriNetUnfolder]: For 4/7 co-relation queries the response was YES. [2023-01-28 08:13:26,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 390 events. 48/390 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1511 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 194. Up to 8 conditions per place. [2023-01-28 08:13:26,929 INFO L119 LiptonReduction]: Number of co-enabled transitions 12936 [2023-01-28 08:13:31,812 INFO L134 LiptonReduction]: Checked pairs total: 23654 [2023-01-28 08:13:31,813 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-01-28 08:13:31,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 08:13:31,820 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;@4974cb94, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:13:31,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 08:13:31,823 INFO L130 PetriNetUnfolder]: 2/25 cut-off events. [2023-01-28 08:13:31,823 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:13:31,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:31,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 08:13:31,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:13:31,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:31,823 INFO L85 PathProgramCache]: Analyzing trace with hash -713333245, now seen corresponding path program 1 times [2023-01-28 08:13:31,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:31,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460157537] [2023-01-28 08:13:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:31,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:13:31,854 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 08:13:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:13:31,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 08:13:31,891 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 08:13:31,891 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-28 08:13:31,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-01-28 08:13:31,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 08:13:31,892 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 08:13:31,892 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-01-28 08:13:31,892 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 08:13:31,893 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 08:13:31,950 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-01-28 08:13:31,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-01-28 08:13:32,056 INFO L130 PetriNetUnfolder]: 191/1195 cut-off events. [2023-01-28 08:13:32,057 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-01-28 08:13:32,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7398 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-01-28 08:13:32,069 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 327 transitions, 702 flow [2023-01-28 08:13:32,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 326 transitions, 696 flow [2023-01-28 08:13:32,075 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:13:32,075 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 326 transitions, 696 flow [2023-01-28 08:13:32,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 326 transitions, 696 flow [2023-01-28 08:13:32,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 326 transitions, 696 flow [2023-01-28 08:13:32,179 INFO L130 PetriNetUnfolder]: 191/1194 cut-off events. [2023-01-28 08:13:32,180 INFO L131 PetriNetUnfolder]: For 71/99 co-relation queries the response was YES. [2023-01-28 08:13:32,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 1194 events. 191/1194 cut-off events. For 71/99 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7443 event pairs, 2 based on Foata normal form. 0/1004 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-01-28 08:13:32,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 53432 [2023-01-28 08:13:38,168 INFO L134 LiptonReduction]: Checked pairs total: 118012 [2023-01-28 08:13:38,168 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-01-28 08:13:38,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:13:38,192 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;@4974cb94, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:13:38,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 08:13:38,203 INFO L130 PetriNetUnfolder]: 9/86 cut-off events. [2023-01-28 08:13:38,203 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 08:13:38,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:38,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:13:38,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:13:38,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:38,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1838717057, now seen corresponding path program 1 times [2023-01-28 08:13:38,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:38,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278039924] [2023-01-28 08:13:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:38,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:38,261 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 08:13:38,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:13:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278039924] [2023-01-28 08:13:38,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278039924] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:13:38,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:13:38,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:13:38,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843316820] [2023-01-28 08:13:38,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:13:38,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:13:38,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:13:38,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:13:38,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:13:38,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 573 [2023-01-28 08:13:38,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 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 08:13:38,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:13:38,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 573 [2023-01-28 08:13:38,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:14:52,602 INFO L130 PetriNetUnfolder]: 824347/1098855 cut-off events. [2023-01-28 08:14:52,602 INFO L131 PetriNetUnfolder]: For 46792/46792 co-relation queries the response was YES. [2023-01-28 08:14:54,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158756 conditions, 1098855 events. 824347/1098855 cut-off events. For 46792/46792 co-relation queries the response was YES. Maximal size of possible extension queue 22543. Compared 8486996 event pairs, 576024 based on Foata normal form. 74880/1019483 useless extension candidates. Maximal degree in co-relation 341991. Up to 1038244 conditions per place. [2023-01-28 08:14:57,652 INFO L137 encePairwiseOnDemand]: 548/573 looper letters, 82 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-01-28 08:14:57,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 101 transitions, 414 flow [2023-01-28 08:14:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:14:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:14:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 941 transitions. [2023-01-28 08:14:57,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474112856311809 [2023-01-28 08:14:57,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 941 transitions. [2023-01-28 08:14:57,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 941 transitions. [2023-01-28 08:14:57,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:14:57,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 941 transitions. [2023-01-28 08:14:57,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 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 08:14:57,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 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 08:14:57,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 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 08:14:57,661 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 272 flow. Second operand 3 states and 941 transitions. [2023-01-28 08:14:57,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 101 transitions, 414 flow [2023-01-28 08:14:57,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 101 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:14:57,744 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 237 flow [2023-01-28 08:14:57,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2023-01-28 08:14:57,745 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 2 predicate places. [2023-01-28 08:14:57,745 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 237 flow [2023-01-28 08:14:57,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 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 08:14:57,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:14:57,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:14:57,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 08:14:57,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:14:57,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:14:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1165120945, now seen corresponding path program 1 times [2023-01-28 08:14:57,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:14:57,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313326029] [2023-01-28 08:14:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:57,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:14:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:14:57,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:14:57,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313326029] [2023-01-28 08:14:57,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313326029] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:14:57,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720803618] [2023-01-28 08:14:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:57,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:57,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:14:57,804 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 08:14:57,831 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 08:14:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:57,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 08:14:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:14:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:14:57,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:14:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:14:57,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720803618] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:14:57,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:14:57,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 08:14:57,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529821239] [2023-01-28 08:14:57,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:14:57,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 08:14:57,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:14:57,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 08:14:57,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 08:14:57,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 573 [2023-01-28 08:14:57,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 237 flow. Second operand has 7 states, 7 states have (on average 281.14285714285717) internal successors, (1968), 7 states have internal predecessors, (1968), 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 08:14:57,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:14:57,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 573 [2023-01-28 08:14:57,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:14:58,020 INFO L130 PetriNetUnfolder]: 257/477 cut-off events. [2023-01-28 08:14:58,021 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-01-28 08:14:58,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 477 events. 257/477 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1989 event pairs, 8 based on Foata normal form. 64/541 useless extension candidates. Maximal degree in co-relation 1019. Up to 306 conditions per place. [2023-01-28 08:14:58,022 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-01-28 08:14:58,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 187 flow [2023-01-28 08:14:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 08:14:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 08:14:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1433 transitions. [2023-01-28 08:14:58,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500174520069808 [2023-01-28 08:14:58,024 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1433 transitions. [2023-01-28 08:14:58,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1433 transitions. [2023-01-28 08:14:58,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:14:58,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1433 transitions. [2023-01-28 08:14:58,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.6) internal successors, (1433), 5 states have internal predecessors, (1433), 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 08:14:58,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 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 08:14:58,031 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 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 08:14:58,032 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 237 flow. Second operand 5 states and 1433 transitions. [2023-01-28 08:14:58,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 187 flow [2023-01-28 08:14:58,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:14:58,032 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-01-28 08:14:58,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-01-28 08:14:58,038 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -55 predicate places. [2023-01-28 08:14:58,038 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-01-28 08:14:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 281.14285714285717) internal successors, (1968), 7 states have internal predecessors, (1968), 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 08:14:58,039 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 08:14:58,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-28 08:14:58,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-28 08:14:58,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 08:14:58,244 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 08:14:58,244 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 08:14:58,245 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-01-28 08:14:58,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-01-28 08:14:58,353 INFO L130 PetriNetUnfolder]: 191/1195 cut-off events. [2023-01-28 08:14:58,353 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-01-28 08:14:58,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7398 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-01-28 08:14:58,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 327 transitions, 702 flow [2023-01-28 08:14:58,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 327 transitions, 702 flow [2023-01-28 08:14:58,370 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:14:58,370 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 327 transitions, 702 flow [2023-01-28 08:14:58,370 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 327 transitions, 702 flow [2023-01-28 08:14:58,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-01-28 08:14:58,467 INFO L130 PetriNetUnfolder]: 191/1195 cut-off events. [2023-01-28 08:14:58,467 INFO L131 PetriNetUnfolder]: For 72/107 co-relation queries the response was YES. [2023-01-28 08:14:58,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 1195 events. 191/1195 cut-off events. For 72/107 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7398 event pairs, 2 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 755. Up to 32 conditions per place. [2023-01-28 08:14:58,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 53524 [2023-01-28 08:15:04,182 INFO L134 LiptonReduction]: Checked pairs total: 118052 [2023-01-28 08:15:04,184 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-01-28 08:15:04,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 08:15:04,185 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;@4974cb94, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:15:04,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 08:15:04,190 INFO L130 PetriNetUnfolder]: 14/96 cut-off events. [2023-01-28 08:15:04,190 INFO L131 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2023-01-28 08:15:04,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:15:04,191 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 08:15:04,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:15:04,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:15:04,191 INFO L85 PathProgramCache]: Analyzing trace with hash 628762806, now seen corresponding path program 1 times [2023-01-28 08:15:04,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:15:04,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694499112] [2023-01-28 08:15:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:15:04,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:15:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:15:04,222 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 08:15:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:15:04,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 08:15:04,250 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 08:15:04,250 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-28 08:15:04,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-01-28 08:15:04,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 08:15:04,251 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 08:15:04,251 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-01-28 08:15:04,251 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 08:15:04,251 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 08:15:04,328 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-01-28 08:15:04,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 444 transitions, 966 flow [2023-01-28 08:15:04,951 INFO L130 PetriNetUnfolder]: 664/3318 cut-off events. [2023-01-28 08:15:04,951 INFO L131 PetriNetUnfolder]: For 419/494 co-relation queries the response was YES. [2023-01-28 08:15:04,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 3318 events. 664/3318 cut-off events. For 419/494 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 25425 event pairs, 32 based on Foata normal form. 0/2817 useless extension candidates. Maximal degree in co-relation 2178. Up to 192 conditions per place. [2023-01-28 08:15:04,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 444 transitions, 966 flow [2023-01-28 08:15:05,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 395 places, 443 transitions, 958 flow [2023-01-28 08:15:05,018 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:15:05,018 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 395 places, 443 transitions, 958 flow [2023-01-28 08:15:05,018 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 395 places, 443 transitions, 958 flow [2023-01-28 08:15:05,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 443 transitions, 958 flow [2023-01-28 08:15:05,483 INFO L130 PetriNetUnfolder]: 664/3317 cut-off events. [2023-01-28 08:15:05,483 INFO L131 PetriNetUnfolder]: For 416/484 co-relation queries the response was YES. [2023-01-28 08:15:05,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3765 conditions, 3317 events. 664/3317 cut-off events. For 416/484 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 25397 event pairs, 32 based on Foata normal form. 0/2816 useless extension candidates. Maximal degree in co-relation 2178. Up to 192 conditions per place. [2023-01-28 08:15:05,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 120246 [2023-01-28 08:15:11,807 INFO L134 LiptonReduction]: Checked pairs total: 273516 [2023-01-28 08:15:11,807 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-01-28 08:15:11,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:15:11,808 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;@4974cb94, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:15:11,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 08:15:11,812 INFO L130 PetriNetUnfolder]: 9/70 cut-off events. [2023-01-28 08:15:11,812 INFO L131 PetriNetUnfolder]: For 4/5 co-relation queries the response was YES. [2023-01-28 08:15:11,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:15:11,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:15:11,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:15:11,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:15:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash 599552984, now seen corresponding path program 1 times [2023-01-28 08:15:11,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:15:11,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467349077] [2023-01-28 08:15:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:15:11,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:15:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:15:11,859 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 08:15:11,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:15:11,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467349077] [2023-01-28 08:15:11,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467349077] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:15:11,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:15:11,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:15:11,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006160449] [2023-01-28 08:15:11,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:15:11,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:15:11,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:15:11,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:15:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:15:11,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 775 [2023-01-28 08:15:11,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 160 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 379.0) internal successors, (1137), 3 states have internal predecessors, (1137), 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 08:15:11,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:15:11,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 775 [2023-01-28 08:15:11,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand