./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb8c1938cc441082517c5681097f5f6483a36107a8ec46d723b101297930909d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:38:44,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:38:44,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:38:44,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:38:44,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:38:44,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:38:44,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:38:44,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:38:44,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:38:44,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:38:44,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:38:44,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:38:44,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:38:44,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:38:44,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:38:44,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:38:44,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:38:44,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:38:44,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:38:44,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:38:44,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:38:44,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:38:44,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:38:44,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:38:44,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:38:44,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:38:44,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:38:44,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:38:44,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:38:44,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:38:44,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:38:44,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:38:44,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:38:44,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:38:44,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:38:44,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:38:44,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:38:44,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:38:44,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:38:44,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:38:44,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:38:44,815 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:38:44,845 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:38:44,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:38:44,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:38:44,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:38:44,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:38:44,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:38:44,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:38:44,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:38:44,850 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:38:44,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:38:44,850 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:38:44,851 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:38:44,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:38:44,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:38:44,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:38:44,851 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:38:44,852 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:38:44,852 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:38:44,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:38:44,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:38:44,852 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:38:44,853 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:38:44,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:38:44,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:38:44,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:38:44,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:38:44,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:38:44,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:38:44,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:38:44,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:38:44,854 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:38:44,854 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:38:44,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:38:44,855 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:38:44,855 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8c1938cc441082517c5681097f5f6483a36107a8ec46d723b101297930909d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:38:45,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:38:45,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:38:45,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:38:45,193 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:38:45,193 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:38:45,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-08-31 22:38:46,326 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:38:46,581 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:38:46,583 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-08-31 22:38:46,593 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b701b7768/8a740d433dae4725885cb5654db80c25/FLAG0aba3f8f4 [2023-08-31 22:38:46,607 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b701b7768/8a740d433dae4725885cb5654db80c25 [2023-08-31 22:38:46,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:38:46,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:38:46,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:38:46,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:38:46,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:38:46,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:38:46" (1/1) ... [2023-08-31 22:38:46,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11451efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:46, skipping insertion in model container [2023-08-31 22:38:46,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:38:46" (1/1) ... [2023-08-31 22:38:46,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:38:46,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:38:46,972 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-ext/26_stack_cas_longer-2.i[31163,31176] [2023-08-31 22:38:46,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:38:46,998 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:38:47,055 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-ext/26_stack_cas_longer-2.i[31163,31176] [2023-08-31 22:38:47,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:38:47,139 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:38:47,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47 WrapperNode [2023-08-31 22:38:47,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:38:47,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:38:47,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:38:47,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:38:47,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,213 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 190 [2023-08-31 22:38:47,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:38:47,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:38:47,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:38:47,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:38:47,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,268 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:38:47,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:38:47,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:38:47,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:38:47,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (1/1) ... [2023-08-31 22:38:47,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:38:47,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:38:47,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 22:38:47,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 22:38:47,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:38:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 22:38:47,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 22:38:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:38:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:38:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:38:47,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:38:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:38:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:38:47,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:38:47,339 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:38:47,512 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:38:47,514 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:38:47,847 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:38:48,122 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:38:48,122 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 22:38:48,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:38:48 BoogieIcfgContainer [2023-08-31 22:38:48,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:38:48,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:38:48,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:38:48,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:38:48,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:38:46" (1/3) ... [2023-08-31 22:38:48,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204e828e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:38:48, skipping insertion in model container [2023-08-31 22:38:48,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:47" (2/3) ... [2023-08-31 22:38:48,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204e828e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:38:48, skipping insertion in model container [2023-08-31 22:38:48,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:38:48" (3/3) ... [2023-08-31 22:38:48,132 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-2.i [2023-08-31 22:38:48,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:38:48,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-31 22:38:48,147 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:38:48,266 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:48,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:48,388 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-31 22:38:48,392 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:38:48,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-31 22:38:48,400 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:48,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:48,407 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:48,415 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:48,423 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:48,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:48,465 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-31 22:38:48,465 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:38:48,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-31 22:38:48,475 INFO L119 LiptonReduction]: Number of co-enabled transitions 4248 [2023-08-31 22:38:53,778 INFO L134 LiptonReduction]: Checked pairs total: 8906 [2023-08-31 22:38:53,779 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-31 22:38:53,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:53,796 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:53,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:38:53,802 INFO L130 PetriNetUnfolder]: 2/32 cut-off events. [2023-08-31 22:38:53,802 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:38:53,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:38:53,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 22:38:53,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:38:53,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:38:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1466791183, now seen corresponding path program 1 times [2023-08-31 22:38:53,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:38:53,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420823521] [2023-08-31 22:38:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:38:53,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:38:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:53,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:38:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:53,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:38:53,944 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:38:53,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:38:53,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:38:53,947 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:38:53,949 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:38:53,950 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:38:53,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 22:38:54,042 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:54,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:54,123 INFO L130 PetriNetUnfolder]: 21/311 cut-off events. [2023-08-31 22:38:54,123 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:38:54,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 311 events. 21/311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 937 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-08-31 22:38:54,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:54,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:54,131 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:54,131 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:54,131 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:54,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:54,180 INFO L130 PetriNetUnfolder]: 21/311 cut-off events. [2023-08-31 22:38:54,181 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:38:54,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 311 events. 21/311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 937 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-08-31 22:38:54,201 INFO L119 LiptonReduction]: Number of co-enabled transitions 36580 [2023-08-31 22:39:00,230 INFO L134 LiptonReduction]: Checked pairs total: 126176 [2023-08-31 22:39:00,231 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-31 22:39:00,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:00,234 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:00,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:00,240 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2023-08-31 22:39:00,241 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:39:00,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:00,241 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 22:39:00,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:00,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1209779092, now seen corresponding path program 1 times [2023-08-31 22:39:00,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:00,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984920965] [2023-08-31 22:39:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:00,265 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:00,290 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:00,290 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:00,291 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:00,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:39:00,291 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:00,292 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:00,292 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:00,292 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 22:39:00,385 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:00,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:39:00,468 INFO L130 PetriNetUnfolder]: 31/447 cut-off events. [2023-08-31 22:39:00,469 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:39:00,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 447 events. 31/447 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1685 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 371. Up to 8 conditions per place. [2023-08-31 22:39:00,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:39:00,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 377 places, 398 transitions, 817 flow [2023-08-31 22:39:00,481 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:00,481 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 377 places, 398 transitions, 817 flow [2023-08-31 22:39:00,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 377 places, 398 transitions, 817 flow [2023-08-31 22:39:00,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:39:00,580 INFO L130 PetriNetUnfolder]: 31/447 cut-off events. [2023-08-31 22:39:00,580 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:39:00,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 447 events. 31/447 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1685 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 371. Up to 8 conditions per place. [2023-08-31 22:39:00,612 INFO L119 LiptonReduction]: Number of co-enabled transitions 96996 [2023-08-31 22:39:08,831 INFO L134 LiptonReduction]: Checked pairs total: 339414 [2023-08-31 22:39:08,831 INFO L136 LiptonReduction]: Total number of compositions: 330 [2023-08-31 22:39:08,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:08,834 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:08,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:08,846 INFO L130 PetriNetUnfolder]: 7/126 cut-off events. [2023-08-31 22:39:08,846 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:39:08,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:08,847 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 22:39:08,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:08,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:08,847 INFO L85 PathProgramCache]: Analyzing trace with hash 899092402, now seen corresponding path program 1 times [2023-08-31 22:39:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:08,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961802701] [2023-08-31 22:39:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:08,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:08,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:08,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:08,894 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:08,894 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:08,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:39:08,895 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:08,895 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:08,896 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:08,896 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 22:39:09,001 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:09,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:39:09,119 INFO L130 PetriNetUnfolder]: 41/583 cut-off events. [2023-08-31 22:39:09,120 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:39:09,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 583 events. 41/583 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2534 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 489. Up to 10 conditions per place. [2023-08-31 22:39:09,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:39:09,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 517 transitions, 1066 flow [2023-08-31 22:39:09,137 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:09,137 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 489 places, 517 transitions, 1066 flow [2023-08-31 22:39:09,137 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 489 places, 517 transitions, 1066 flow [2023-08-31 22:39:09,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:39:09,278 INFO L130 PetriNetUnfolder]: 41/583 cut-off events. [2023-08-31 22:39:09,279 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:39:09,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 583 events. 41/583 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2534 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 489. Up to 10 conditions per place. [2023-08-31 22:39:09,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 185496 [2023-08-31 22:39:19,683 INFO L134 LiptonReduction]: Checked pairs total: 596813 [2023-08-31 22:39:19,683 INFO L136 LiptonReduction]: Total number of compositions: 419 [2023-08-31 22:39:19,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:19,689 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:19,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:19,719 INFO L130 PetriNetUnfolder]: 14/205 cut-off events. [2023-08-31 22:39:19,720 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:39:19,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:19,720 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 22:39:19,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:19,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1264261348, now seen corresponding path program 1 times [2023-08-31 22:39:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820800059] [2023-08-31 22:39:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:19,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:19,752 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:19,809 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:19,810 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:19,810 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:19,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:39:19,811 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:19,811 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:19,812 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:19,812 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 22:39:19,921 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:19,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:20,158 INFO L130 PetriNetUnfolder]: 51/719 cut-off events. [2023-08-31 22:39:20,158 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:39:20,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 719 events. 51/719 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3422 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 607. Up to 12 conditions per place. [2023-08-31 22:39:20,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:20,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:20,184 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:20,184 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:20,185 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:20,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:20,378 INFO L130 PetriNetUnfolder]: 51/719 cut-off events. [2023-08-31 22:39:20,378 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:39:20,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 719 events. 51/719 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3422 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 607. Up to 12 conditions per place. [2023-08-31 22:39:20,452 INFO L119 LiptonReduction]: Number of co-enabled transitions 302080 [2023-08-31 22:39:33,634 INFO L134 LiptonReduction]: Checked pairs total: 936587 [2023-08-31 22:39:33,635 INFO L136 LiptonReduction]: Total number of compositions: 515 [2023-08-31 22:39:33,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:33,637 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:33,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:33,672 INFO L130 PetriNetUnfolder]: 22/282 cut-off events. [2023-08-31 22:39:33,672 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:39:33,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:33,672 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:39:33,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:33,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1418106041, now seen corresponding path program 1 times [2023-08-31 22:39:33,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:33,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445437766] [2023-08-31 22:39:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:33,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:33,718 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:33,740 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:33,740 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:33,740 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:39:33,740 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:33,741 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:33,741 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:33,741 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 22:39:33,869 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:33,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:34,122 INFO L130 PetriNetUnfolder]: 61/855 cut-off events. [2023-08-31 22:39:34,122 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:39:34,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 855 events. 61/855 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4325 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 738. Up to 14 conditions per place. [2023-08-31 22:39:34,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:34,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:34,148 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:34,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:34,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:34,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:34,424 INFO L130 PetriNetUnfolder]: 61/855 cut-off events. [2023-08-31 22:39:34,425 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:39:34,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 855 events. 61/855 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4325 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 738. Up to 14 conditions per place. [2023-08-31 22:39:34,500 INFO L119 LiptonReduction]: Number of co-enabled transitions 446748 [2023-08-31 22:39:49,485 INFO L134 LiptonReduction]: Checked pairs total: 1452909 [2023-08-31 22:39:49,485 INFO L136 LiptonReduction]: Total number of compositions: 616 [2023-08-31 22:39:49,487 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:49,487 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:49,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:49,541 INFO L130 PetriNetUnfolder]: 28/358 cut-off events. [2023-08-31 22:39:49,541 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:39:49,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:49,542 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:39:49,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:49,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:49,542 INFO L85 PathProgramCache]: Analyzing trace with hash -306706194, now seen corresponding path program 1 times [2023-08-31 22:39:49,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:49,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081822901] [2023-08-31 22:39:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:49,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:49,576 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:49,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:49,606 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:49,606 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:49,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:39:49,606 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:49,607 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:49,607 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:49,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 22:39:49,772 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:49,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:50,090 INFO L130 PetriNetUnfolder]: 71/991 cut-off events. [2023-08-31 22:39:50,090 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:39:50,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 991 events. 71/991 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5271 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 881. Up to 16 conditions per place. [2023-08-31 22:39:50,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:50,141 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:50,141 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:50,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:50,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:50,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:50,516 INFO L130 PetriNetUnfolder]: 71/991 cut-off events. [2023-08-31 22:39:50,516 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:39:50,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 991 events. 71/991 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5271 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 881. Up to 16 conditions per place. [2023-08-31 22:39:50,653 INFO L119 LiptonReduction]: Number of co-enabled transitions 619500 [2023-08-31 22:40:07,691 INFO L134 LiptonReduction]: Checked pairs total: 2263952 [2023-08-31 22:40:07,691 INFO L136 LiptonReduction]: Total number of compositions: 694 [2023-08-31 22:40:07,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:40:07,693 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:40:07,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:40:07,766 INFO L130 PetriNetUnfolder]: 35/435 cut-off events. [2023-08-31 22:40:07,767 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:40:07,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:40:07,767 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:40:07,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:40:07,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:40:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1672351494, now seen corresponding path program 1 times [2023-08-31 22:40:07,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:40:07,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990486627] [2023-08-31 22:40:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:40:07,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:40:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:07,788 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:40:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:07,806 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:40:07,807 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:40:07,807 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:40:07,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:40:07,807 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:40:07,808 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:40:07,808 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:40:07,808 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 22:40:07,973 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:40:07,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:40:08,327 INFO L130 PetriNetUnfolder]: 81/1127 cut-off events. [2023-08-31 22:40:08,327 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:40:08,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1127 events. 81/1127 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6169 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1025. Up to 18 conditions per place. [2023-08-31 22:40:08,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:40:08,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 937 places, 993 transitions, 2082 flow [2023-08-31 22:40:08,381 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:40:08,382 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 937 places, 993 transitions, 2082 flow [2023-08-31 22:40:08,382 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 937 places, 993 transitions, 2082 flow [2023-08-31 22:40:08,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:40:08,774 INFO L130 PetriNetUnfolder]: 81/1127 cut-off events. [2023-08-31 22:40:08,775 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:40:08,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1127 events. 81/1127 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6169 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1025. Up to 18 conditions per place. [2023-08-31 22:40:08,945 INFO L119 LiptonReduction]: Number of co-enabled transitions 820336 [2023-08-31 22:40:28,272 INFO L134 LiptonReduction]: Checked pairs total: 2694040 [2023-08-31 22:40:28,272 INFO L136 LiptonReduction]: Total number of compositions: 796 [2023-08-31 22:40:28,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:40:28,275 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:40:28,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:40:28,435 INFO L130 PetriNetUnfolder]: 43/514 cut-off events. [2023-08-31 22:40:28,435 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:40:28,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:40:28,435 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:40:28,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:40:28,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:40:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash 24339606, now seen corresponding path program 1 times [2023-08-31 22:40:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:40:28,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720609284] [2023-08-31 22:40:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:40:28,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:40:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:28,471 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:40:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:28,499 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:40:28,499 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:40:28,506 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:40:28,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:40:28,506 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:40:28,507 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:40:28,507 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:40:28,507 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 22:40:28,709 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:40:28,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:29,184 INFO L130 PetriNetUnfolder]: 91/1263 cut-off events. [2023-08-31 22:40:29,184 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:40:29,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1263 events. 91/1263 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7146 event pairs, 0 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1170. Up to 20 conditions per place. [2023-08-31 22:40:29,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:29,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:29,243 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:40:29,243 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:29,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:29,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:29,744 INFO L130 PetriNetUnfolder]: 91/1263 cut-off events. [2023-08-31 22:40:29,744 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:40:29,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1263 events. 91/1263 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7146 event pairs, 0 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1170. Up to 20 conditions per place. [2023-08-31 22:40:29,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 1049256 [2023-08-31 22:40:52,473 INFO L134 LiptonReduction]: Checked pairs total: 3805572 [2023-08-31 22:40:52,474 INFO L136 LiptonReduction]: Total number of compositions: 892 [2023-08-31 22:40:52,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:40:52,476 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:40:52,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:40:52,580 INFO L130 PetriNetUnfolder]: 50/591 cut-off events. [2023-08-31 22:40:52,581 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:40:52,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:40:52,581 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:40:52,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:40:52,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:40:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1294917962, now seen corresponding path program 1 times [2023-08-31 22:40:52,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:40:52,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546647910] [2023-08-31 22:40:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:40:52,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:40:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:52,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:40:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:52,631 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:40:52,632 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:40:52,632 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:40:52,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:40:52,632 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:40:52,633 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:40:52,633 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:40:52,633 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 22:40:52,822 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:40:52,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:53,444 INFO L130 PetriNetUnfolder]: 101/1399 cut-off events. [2023-08-31 22:40:53,444 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:40:53,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1399 events. 101/1399 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8067 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 1316. Up to 22 conditions per place. [2023-08-31 22:40:53,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:53,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:53,499 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:40:53,499 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:53,499 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:53,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:54,075 INFO L130 PetriNetUnfolder]: 101/1399 cut-off events. [2023-08-31 22:40:54,075 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:40:54,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1399 events. 101/1399 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8067 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 1316. Up to 22 conditions per place. [2023-08-31 22:40:54,277 INFO L119 LiptonReduction]: Number of co-enabled transitions 1306260 [2023-08-31 22:41:19,735 INFO L134 LiptonReduction]: Checked pairs total: 4772839 [2023-08-31 22:41:19,735 INFO L136 LiptonReduction]: Total number of compositions: 990 [2023-08-31 22:41:19,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:41:19,737 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:41:19,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:41:19,888 INFO L130 PetriNetUnfolder]: 57/669 cut-off events. [2023-08-31 22:41:19,888 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:41:19,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:41:19,888 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:41:19,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:41:19,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:41:19,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1525356355, now seen corresponding path program 1 times [2023-08-31 22:41:19,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:41:19,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383685675] [2023-08-31 22:41:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:41:19,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:41:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:19,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:41:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:19,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:41:19,949 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:41:19,949 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:41:19,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:41:19,950 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:41:19,950 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:41:19,950 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:41:19,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 22:41:20,168 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:41:20,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:20,785 INFO L130 PetriNetUnfolder]: 111/1535 cut-off events. [2023-08-31 22:41:20,785 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:41:20,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1535 events. 111/1535 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8995 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 1464. Up to 24 conditions per place. [2023-08-31 22:41:20,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:20,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:20,895 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:41:20,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:20,896 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:20,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:21,495 INFO L130 PetriNetUnfolder]: 111/1535 cut-off events. [2023-08-31 22:41:21,495 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:41:21,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1535 events. 111/1535 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8995 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 1464. Up to 24 conditions per place. [2023-08-31 22:41:21,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 1591348 [2023-08-31 22:41:50,008 INFO L134 LiptonReduction]: Checked pairs total: 5931490 [2023-08-31 22:41:50,008 INFO L136 LiptonReduction]: Total number of compositions: 1098 [2023-08-31 22:41:50,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:41:50,010 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:41:50,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:41:50,165 INFO L130 PetriNetUnfolder]: 64/744 cut-off events. [2023-08-31 22:41:50,166 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:41:50,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:41:50,166 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:41:50,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:41:50,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:41:50,166 INFO L85 PathProgramCache]: Analyzing trace with hash -864123118, now seen corresponding path program 1 times [2023-08-31 22:41:50,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:41:50,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476870595] [2023-08-31 22:41:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:41:50,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:41:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:50,196 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:41:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:50,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:41:50,226 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:41:50,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:41:50,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:41:50,226 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:41:50,227 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:41:50,227 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:41:50,227 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 22:41:50,420 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:41:50,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:51,218 INFO L130 PetriNetUnfolder]: 121/1671 cut-off events. [2023-08-31 22:41:51,218 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:41:51,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 1671 events. 121/1671 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9926 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1614. Up to 26 conditions per place. [2023-08-31 22:41:51,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:51,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:51,292 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:41:51,292 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:51,292 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:51,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:52,069 INFO L130 PetriNetUnfolder]: 121/1671 cut-off events. [2023-08-31 22:41:52,069 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:41:52,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 1671 events. 121/1671 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9926 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1614. Up to 26 conditions per place. [2023-08-31 22:41:52,367 INFO L119 LiptonReduction]: Number of co-enabled transitions 1904520 [2023-08-31 22:42:22,760 INFO L134 LiptonReduction]: Checked pairs total: 6195274 [2023-08-31 22:42:22,761 INFO L136 LiptonReduction]: Total number of compositions: 1171 [2023-08-31 22:42:22,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:42:22,763 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:42:22,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:42:22,930 INFO L130 PetriNetUnfolder]: 70/821 cut-off events. [2023-08-31 22:42:22,931 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:42:22,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:42:22,931 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:42:22,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:42:22,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:42:22,931 INFO L85 PathProgramCache]: Analyzing trace with hash 715230075, now seen corresponding path program 1 times [2023-08-31 22:42:22,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:42:22,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058797299] [2023-08-31 22:42:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:42:22,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:42:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:22,960 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:42:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:22,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:42:22,991 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:42:22,992 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:42:22,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:42:22,992 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:42:22,992 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:42:22,993 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:42:22,993 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 22:42:23,247 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:42:23,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:24,128 INFO L130 PetriNetUnfolder]: 131/1807 cut-off events. [2023-08-31 22:42:24,128 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:42:24,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 1807 events. 131/1807 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10880 event pairs, 0 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 1765. Up to 28 conditions per place. [2023-08-31 22:42:24,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:24,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:24,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:42:24,261 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:24,261 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:24,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:25,083 INFO L130 PetriNetUnfolder]: 131/1807 cut-off events. [2023-08-31 22:42:25,083 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:42:25,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 1807 events. 131/1807 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10880 event pairs, 0 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 1765. Up to 28 conditions per place. [2023-08-31 22:42:25,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 2245776 [2023-08-31 22:42:58,958 INFO L134 LiptonReduction]: Checked pairs total: 8237028 [2023-08-31 22:42:58,958 INFO L136 LiptonReduction]: Total number of compositions: 1257 [2023-08-31 22:42:58,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:42:58,962 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:42:58,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:42:59,163 INFO L130 PetriNetUnfolder]: 78/902 cut-off events. [2023-08-31 22:42:59,163 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:42:59,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:42:59,163 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:42:59,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:42:59,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:42:59,164 INFO L85 PathProgramCache]: Analyzing trace with hash 269357184, now seen corresponding path program 1 times [2023-08-31 22:42:59,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:42:59,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943837048] [2023-08-31 22:42:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:42:59,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:42:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:59,195 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:42:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:59,230 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:42:59,231 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:42:59,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:42:59,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:42:59,231 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:42:59,232 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:42:59,232 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:42:59,232 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 22:42:59,454 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:42:59,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:43:00,592 INFO L130 PetriNetUnfolder]: 141/1943 cut-off events. [2023-08-31 22:43:00,592 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:43:00,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1943 events. 141/1943 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11799 event pairs, 0 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 1917. Up to 30 conditions per place. [2023-08-31 22:43:00,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:43:00,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:43:00,750 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:00,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:43:00,750 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:43:00,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:43:01,807 INFO L130 PetriNetUnfolder]: 141/1943 cut-off events. [2023-08-31 22:43:01,807 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:43:01,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1943 events. 141/1943 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11799 event pairs, 0 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 1917. Up to 30 conditions per place. [2023-08-31 22:43:02,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 2615116 [2023-08-31 22:43:39,067 INFO L134 LiptonReduction]: Checked pairs total: 9565905 [2023-08-31 22:43:39,067 INFO L136 LiptonReduction]: Total number of compositions: 1354 [2023-08-31 22:43:39,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:39,069 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:39,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:39,317 INFO L130 PetriNetUnfolder]: 84/976 cut-off events. [2023-08-31 22:43:39,317 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:43:39,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:39,317 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:43:39,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:39,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash -576661935, now seen corresponding path program 1 times [2023-08-31 22:43:39,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:39,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578783211] [2023-08-31 22:43:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:39,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:39,358 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:39,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:39,396 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:39,396 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:39,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:43:39,396 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:39,397 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:39,397 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:39,397 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 22:43:39,639 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:39,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:41,018 INFO L130 PetriNetUnfolder]: 151/2079 cut-off events. [2023-08-31 22:43:41,018 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:43:41,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 2079 events. 151/2079 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12698 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 2070. Up to 32 conditions per place. [2023-08-31 22:43:41,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:41,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:41,136 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:41,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:41,136 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:41,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:42,382 INFO L130 PetriNetUnfolder]: 151/2079 cut-off events. [2023-08-31 22:43:42,382 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:43:42,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 2079 events. 151/2079 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12698 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 2070. Up to 32 conditions per place. [2023-08-31 22:43:43,037 INFO L119 LiptonReduction]: Number of co-enabled transitions 3012540 [2023-08-31 22:44:23,018 INFO L134 LiptonReduction]: Checked pairs total: 9837000 [2023-08-31 22:44:23,018 INFO L136 LiptonReduction]: Total number of compositions: 1500 [2023-08-31 22:44:23,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:23,020 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:23,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:23,360 INFO L130 PetriNetUnfolder]: 91/1054 cut-off events. [2023-08-31 22:44:23,360 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:44:23,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:23,360 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:44:23,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:23,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1987508024, now seen corresponding path program 1 times [2023-08-31 22:44:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:23,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416016293] [2023-08-31 22:44:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:23,395 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:23,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:23,431 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:23,431 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:23,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:44:23,432 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:23,432 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:23,432 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:23,432 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 22:44:23,721 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:44:23,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:25,287 INFO L130 PetriNetUnfolder]: 161/2215 cut-off events. [2023-08-31 22:44:25,287 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:44:25,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 2215 events. 161/2215 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 13703 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 2224. Up to 34 conditions per place. [2023-08-31 22:44:25,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:25,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:25,409 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:44:25,409 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:25,410 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:25,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:27,413 INFO L130 PetriNetUnfolder]: 161/2215 cut-off events. [2023-08-31 22:44:27,413 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:44:27,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 2215 events. 161/2215 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 13703 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 2224. Up to 34 conditions per place. [2023-08-31 22:44:28,325 INFO L119 LiptonReduction]: Number of co-enabled transitions 3438048 [2023-08-31 22:45:10,904 INFO L134 LiptonReduction]: Checked pairs total: 12466357 [2023-08-31 22:45:10,904 INFO L136 LiptonReduction]: Total number of compositions: 1561 [2023-08-31 22:45:10,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:10,907 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:10,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:11,291 INFO L130 PetriNetUnfolder]: 98/1129 cut-off events. [2023-08-31 22:45:11,291 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:45:11,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:11,291 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:11,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:11,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash 983350106, now seen corresponding path program 1 times [2023-08-31 22:45:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:11,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20313869] [2023-08-31 22:45:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:11,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:11,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:11,369 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:11,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:11,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:45:11,369 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:11,370 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:11,370 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:11,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 22:45:11,666 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:11,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:45:13,382 INFO L130 PetriNetUnfolder]: 171/2351 cut-off events. [2023-08-31 22:45:13,382 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:45:13,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2351 events. 171/2351 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 14546 event pairs, 0 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 2379. Up to 36 conditions per place. [2023-08-31 22:45:13,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:45:13,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:45:13,522 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:13,522 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:45:13,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:45:13,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:45:15,261 INFO L130 PetriNetUnfolder]: 171/2351 cut-off events. [2023-08-31 22:45:15,261 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:45:15,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2351 events. 171/2351 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 14546 event pairs, 0 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 2379. Up to 36 conditions per place. [2023-08-31 22:45:16,175 INFO L119 LiptonReduction]: Number of co-enabled transitions 3891640 [2023-08-31 22:46:01,127 INFO L134 LiptonReduction]: Checked pairs total: 12664229 [2023-08-31 22:46:01,128 INFO L136 LiptonReduction]: Total number of compositions: 1624 [2023-08-31 22:46:01,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:01,130 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:01,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:01,533 INFO L130 PetriNetUnfolder]: 106/1209 cut-off events. [2023-08-31 22:46:01,533 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:46:01,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:01,534 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:46:01,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:01,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1990890871, now seen corresponding path program 1 times [2023-08-31 22:46:01,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:01,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026104682] [2023-08-31 22:46:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:01,569 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:01,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:01,610 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:01,610 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:01,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:46:01,611 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:01,611 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:01,611 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:01,611 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 22:46:01,939 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:01,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:46:04,041 INFO L130 PetriNetUnfolder]: 181/2487 cut-off events. [2023-08-31 22:46:04,041 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:46:04,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 2487 events. 181/2487 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 15515 event pairs, 0 based on Foata normal form. 0/1528 useless extension candidates. Maximal degree in co-relation 2535. Up to 38 conditions per place. [2023-08-31 22:46:04,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:46:04,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:46:04,205 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:04,206 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:46:04,206 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:46:04,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:46:06,083 INFO L130 PetriNetUnfolder]: 181/2487 cut-off events. [2023-08-31 22:46:06,083 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:46:06,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 2487 events. 181/2487 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 15515 event pairs, 0 based on Foata normal form. 0/1528 useless extension candidates. Maximal degree in co-relation 2535. Up to 38 conditions per place. [2023-08-31 22:46:06,982 INFO L119 LiptonReduction]: Number of co-enabled transitions 4373316 [2023-08-31 22:46:56,982 INFO L134 LiptonReduction]: Checked pairs total: 15781083 [2023-08-31 22:46:56,983 INFO L136 LiptonReduction]: Total number of compositions: 1756 [2023-08-31 22:46:56,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:56,985 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:56,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:57,424 INFO L130 PetriNetUnfolder]: 113/1285 cut-off events. [2023-08-31 22:46:57,424 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:46:57,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:57,424 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:46:57,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:57,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash -528127944, now seen corresponding path program 1 times [2023-08-31 22:46:57,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:57,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2611204] [2023-08-31 22:46:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:57,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:57,481 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:57,524 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:57,527 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:57,527 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:57,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:46:57,528 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:57,528 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:57,529 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:57,530 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 22:46:57,872 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:57,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:47:00,107 INFO L130 PetriNetUnfolder]: 191/2623 cut-off events. [2023-08-31 22:47:00,107 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:47:00,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 2623 events. 191/2623 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 16501 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 2692. Up to 40 conditions per place. [2023-08-31 22:47:00,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:47:00,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:47:00,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:47:00,397 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:47:00,397 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:47:00,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:47:02,482 INFO L130 PetriNetUnfolder]: 191/2623 cut-off events. [2023-08-31 22:47:02,482 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:47:02,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 2623 events. 191/2623 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 16501 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 2692. Up to 40 conditions per place. [2023-08-31 22:47:03,656 INFO L119 LiptonReduction]: Number of co-enabled transitions 4883076 [2023-08-31 22:47:56,934 INFO L134 LiptonReduction]: Checked pairs total: 15716525 [2023-08-31 22:47:56,934 INFO L136 LiptonReduction]: Total number of compositions: 1855 [2023-08-31 22:47:56,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:47:56,937 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:47:56,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:47:57,475 INFO L130 PetriNetUnfolder]: 120/1363 cut-off events. [2023-08-31 22:47:57,475 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:47:57,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:47:57,476 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:47:57,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:47:57,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:47:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1617347922, now seen corresponding path program 1 times [2023-08-31 22:47:57,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:47:57,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131913494] [2023-08-31 22:47:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:47:57,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:47:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:57,517 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:47:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:57,561 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:47:57,562 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:47:57,562 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:47:57,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:47:57,562 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:47:57,563 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:47:57,563 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:47:57,563 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 22:47:58,148 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:47:58,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:48:00,503 INFO L130 PetriNetUnfolder]: 201/2759 cut-off events. [2023-08-31 22:48:00,504 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:48:00,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 2759 events. 201/2759 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 17404 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2850. Up to 42 conditions per place. [2023-08-31 22:48:00,669 INFO L82 GeneralOperation]: Start removeDead. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:48:00,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:48:00,709 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:48:00,709 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:48:00,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:48:00,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:48:03,108 INFO L130 PetriNetUnfolder]: 201/2759 cut-off events. [2023-08-31 22:48:03,108 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:48:03,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 2759 events. 201/2759 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 17404 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2850. Up to 42 conditions per place. [2023-08-31 22:48:04,238 INFO L119 LiptonReduction]: Number of co-enabled transitions 5420920 [2023-08-31 22:49:00,276 INFO L134 LiptonReduction]: Checked pairs total: 19338241 [2023-08-31 22:49:00,276 INFO L136 LiptonReduction]: Total number of compositions: 1925 [2023-08-31 22:49:00,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:49:00,278 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:49:00,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:49:00,961 INFO L130 PetriNetUnfolder]: 126/1437 cut-off events. [2023-08-31 22:49:00,961 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:49:00,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:49:00,961 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:49:00,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:49:00,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:49:00,962 INFO L85 PathProgramCache]: Analyzing trace with hash -334844340, now seen corresponding path program 1 times [2023-08-31 22:49:00,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:49:00,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086301094] [2023-08-31 22:49:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:49:00,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:49:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:01,008 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:49:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:01,058 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:49:01,058 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:49:01,059 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:49:01,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:49:01,059 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:49:01,060 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:49:01,060 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:49:01,060 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 22:49:01,371 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:49:01,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:49:04,132 INFO L130 PetriNetUnfolder]: 211/2895 cut-off events. [2023-08-31 22:49:04,132 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:49:04,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 2895 events. 211/2895 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 18339 event pairs, 0 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3009. Up to 44 conditions per place. [2023-08-31 22:49:04,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:49:04,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:49:04,335 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:49:04,335 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:49:04,335 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:49:04,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:49:06,842 INFO L130 PetriNetUnfolder]: 211/2895 cut-off events. [2023-08-31 22:49:06,842 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:49:07,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 2895 events. 211/2895 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 18339 event pairs, 0 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3009. Up to 44 conditions per place. [2023-08-31 22:49:08,317 INFO L119 LiptonReduction]: Number of co-enabled transitions 5986848 [2023-08-31 22:50:07,574 INFO L134 LiptonReduction]: Checked pairs total: 19463730 [2023-08-31 22:50:07,575 INFO L136 LiptonReduction]: Total number of compositions: 2019 [2023-08-31 22:50:07,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:50:07,577 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=All, 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;@73a07768, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:50:07,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:50:08,224 INFO L130 PetriNetUnfolder]: 134/1517 cut-off events. [2023-08-31 22:50:08,224 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:50:08,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:50:08,224 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:50:08,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:50:08,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:50:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1825126112, now seen corresponding path program 1 times [2023-08-31 22:50:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:50:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639238822] [2023-08-31 22:50:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:50:08,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:50:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:08,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:50:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:08,316 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:50:08,316 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:50:08,316 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:50:08,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 22:50:08,317 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:50:08,317 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:50:08,317 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:50:08,317 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 22:50:08,733 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:50:08,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:50:11,801 INFO L130 PetriNetUnfolder]: 221/3031 cut-off events. [2023-08-31 22:50:11,801 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:50:11,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3351 conditions, 3031 events. 221/3031 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 19286 event pairs, 0 based on Foata normal form. 0/1860 useless extension candidates. Maximal degree in co-relation 3169. Up to 46 conditions per place. [2023-08-31 22:50:11,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:50:12,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:50:12,043 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:50:12,043 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:50:12,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:50:12,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2505 places, 2659 transitions, 5890 flow Killed by 15