./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/03_incdec.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/03_incdec.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:04:34,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:04:34,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:04:34,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:04:34,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:04:34,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:04:34,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:04:34,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:04:34,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:04:34,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:04:34,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:04:34,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:04:34,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:04:34,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:04:34,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:04:34,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:04:34,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:04:34,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:04:34,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:04:34,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:04:34,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:04:34,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:04:34,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:04:34,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:04:34,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:04:34,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:04:34,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:04:34,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:04:34,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:04:34,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:04:34,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:04:34,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:04:34,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:04:34,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:04:34,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:04:34,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:04:34,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:04:34,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:04:34,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:04:34,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:04:34,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:04:34,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:04:34,903 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:04:34,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:04:34,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:04:34,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:04:34,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:04:34,904 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:04:34,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:04:34,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:04:34,905 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:04:34,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:04:34,905 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:04:34,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:04:34,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:04:34,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:04:34,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:04:34,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:04:34,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:04:34,907 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:04:34,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:04:34,907 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:04:34,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:04:34,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:04:34,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:04:34,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:04:34,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:04:34,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:04:34,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:04:34,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:04:34,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:04:34,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:04:34,909 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:04:34,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:04:34,909 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:04:34,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:04:34,910 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:04:34,910 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:04:35,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:04:35,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:04:35,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:04:35,247 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:04:35,248 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:04:35,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-09-01 09:04:36,479 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:04:36,696 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:04:36,696 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-09-01 09:04:36,706 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/752b7a5d2/2c2e80be871e46c49a93f60c38c5216b/FLAG22c1423e5 [2023-09-01 09:04:36,721 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/752b7a5d2/2c2e80be871e46c49a93f60c38c5216b [2023-09-01 09:04:36,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:04:36,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:04:36,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:04:36,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:04:36,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:04:36,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:04:36" (1/1) ... [2023-09-01 09:04:36,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be0cde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:36, skipping insertion in model container [2023-09-01 09:04:36,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:04:36" (1/1) ... [2023-09-01 09:04:36,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:04:36,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:04:37,104 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/03_incdec.i[30534,30547] [2023-09-01 09:04:37,112 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/03_incdec.i[30928,30941] [2023-09-01 09:04:37,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:04:37,129 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:04:37,168 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/03_incdec.i[30534,30547] [2023-09-01 09:04:37,171 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/03_incdec.i[30928,30941] [2023-09-01 09:04:37,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:04:37,220 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:04:37,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37 WrapperNode [2023-09-01 09:04:37,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:04:37,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:04:37,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:04:37,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:04:37,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,284 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 134 [2023-09-01 09:04:37,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:04:37,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:04:37,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:04:37,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:04:37,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,325 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:04:37,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:04:37,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:04:37,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:04:37,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (1/1) ... [2023-09-01 09:04:37,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:04:37,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:04:37,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 09:04:37,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 09:04:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 09:04:37,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 09:04:37,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:04:37,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:04:37,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:04:37,414 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 09:04:37,545 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:04:37,553 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:04:37,752 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:04:37,861 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:04:37,861 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-09-01 09:04:37,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:04:37 BoogieIcfgContainer [2023-09-01 09:04:37,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:04:37,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:04:37,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:04:37,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:04:37,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:04:36" (1/3) ... [2023-09-01 09:04:37,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a94fef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:04:37, skipping insertion in model container [2023-09-01 09:04:37,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:37" (2/3) ... [2023-09-01 09:04:37,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a94fef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:04:37, skipping insertion in model container [2023-09-01 09:04:37,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:04:37" (3/3) ... [2023-09-01 09:04:37,873 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-09-01 09:04:37,880 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:04:37,888 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:04:37,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 09:04:37,889 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:04:37,968 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:04:38,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 167 flow [2023-09-01 09:04:38,079 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2023-09-01 09:04:38,080 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:04:38,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-09-01 09:04:38,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 81 transitions, 167 flow [2023-09-01 09:04:38,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 81 transitions, 167 flow [2023-09-01 09:04:38,091 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:04:38,103 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 167 flow [2023-09-01 09:04:38,105 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 81 transitions, 167 flow [2023-09-01 09:04:38,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 167 flow [2023-09-01 09:04:38,126 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2023-09-01 09:04:38,126 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:04:38,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-09-01 09:04:38,128 INFO L119 LiptonReduction]: Number of co-enabled transitions 1378 [2023-09-01 09:04:42,830 INFO L134 LiptonReduction]: Checked pairs total: 1359 [2023-09-01 09:04:42,831 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-09-01 09:04:42,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:04:42,847 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:04:42,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:04:42,851 INFO L130 PetriNetUnfolder]: 0/10 cut-off events. [2023-09-01 09:04:42,851 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:04:42,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:04:42,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 09:04:42,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:04:42,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:04:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash -689861676, now seen corresponding path program 1 times [2023-09-01 09:04:42,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:04:42,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755688911] [2023-09-01 09:04:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:04:42,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:04:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:42,952 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:04:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:42,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:04:42,980 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:04:42,981 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:04:42,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:04:42,983 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:04:42,985 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:04:42,986 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:04:42,986 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 09:04:43,011 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:04:43,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 135 transitions, 282 flow [2023-09-01 09:04:43,057 INFO L130 PetriNetUnfolder]: 13/157 cut-off events. [2023-09-01 09:04:43,060 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:04:43,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 474 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 118. Up to 6 conditions per place. [2023-09-01 09:04:43,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 135 transitions, 282 flow [2023-09-01 09:04:43,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 135 transitions, 282 flow [2023-09-01 09:04:43,069 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:04:43,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 135 transitions, 282 flow [2023-09-01 09:04:43,070 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 135 transitions, 282 flow [2023-09-01 09:04:43,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 135 transitions, 282 flow [2023-09-01 09:04:43,104 INFO L130 PetriNetUnfolder]: 13/157 cut-off events. [2023-09-01 09:04:43,104 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:04:43,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 474 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 118. Up to 6 conditions per place. [2023-09-01 09:04:43,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 8480 [2023-09-01 09:04:45,621 INFO L134 LiptonReduction]: Checked pairs total: 31412 [2023-09-01 09:04:45,622 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-09-01 09:04:45,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:04:45,630 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:04:45,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:04:45,645 INFO L130 PetriNetUnfolder]: 3/43 cut-off events. [2023-09-01 09:04:45,645 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:04:45,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:04:45,646 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 09:04:45,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:04:45,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:04:45,647 INFO L85 PathProgramCache]: Analyzing trace with hash 896775523, now seen corresponding path program 1 times [2023-09-01 09:04:45,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:04:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720746217] [2023-09-01 09:04:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:04:45,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:04:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:45,687 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:04:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:45,723 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:04:45,724 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:04:45,724 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:04:45,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:04:45,725 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:04:45,726 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:04:45,726 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:04:45,727 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 09:04:45,767 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:04:45,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 399 flow [2023-09-01 09:04:45,826 INFO L130 PetriNetUnfolder]: 19/223 cut-off events. [2023-09-01 09:04:45,826 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:04:45,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 223 events. 19/223 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 789 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-09-01 09:04:45,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 189 transitions, 399 flow [2023-09-01 09:04:45,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 189 transitions, 399 flow [2023-09-01 09:04:45,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:04:45,835 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 189 transitions, 399 flow [2023-09-01 09:04:45,835 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 189 transitions, 399 flow [2023-09-01 09:04:45,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 399 flow [2023-09-01 09:04:45,879 INFO L130 PetriNetUnfolder]: 19/223 cut-off events. [2023-09-01 09:04:45,879 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:04:45,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 223 events. 19/223 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 789 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-09-01 09:04:45,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 21306 [2023-09-01 09:04:49,098 INFO L134 LiptonReduction]: Checked pairs total: 84912 [2023-09-01 09:04:49,098 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-09-01 09:04:49,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:04:49,101 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:04:49,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:04:49,107 INFO L130 PetriNetUnfolder]: 8/76 cut-off events. [2023-09-01 09:04:49,107 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:04:49,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:04:49,108 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 09:04:49,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:04:49,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:04:49,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1731754208, now seen corresponding path program 1 times [2023-09-01 09:04:49,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:04:49,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706517841] [2023-09-01 09:04:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:04:49,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:04:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:49,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:04:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:49,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:04:49,144 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:04:49,144 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:04:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:04:49,145 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:04:49,145 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:04:49,146 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:04:49,146 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 09:04:49,173 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:04:49,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 243 transitions, 518 flow [2023-09-01 09:04:49,208 INFO L130 PetriNetUnfolder]: 25/289 cut-off events. [2023-09-01 09:04:49,209 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:04:49,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 289 events. 25/289 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1114 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 231. Up to 10 conditions per place. [2023-09-01 09:04:49,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 243 transitions, 518 flow [2023-09-01 09:04:49,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 243 transitions, 518 flow [2023-09-01 09:04:49,215 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:04:49,215 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 243 transitions, 518 flow [2023-09-01 09:04:49,215 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 243 transitions, 518 flow [2023-09-01 09:04:49,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 243 transitions, 518 flow [2023-09-01 09:04:49,254 INFO L130 PetriNetUnfolder]: 25/289 cut-off events. [2023-09-01 09:04:49,254 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:04:49,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 289 events. 25/289 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1114 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 231. Up to 10 conditions per place. [2023-09-01 09:04:49,268 INFO L119 LiptonReduction]: Number of co-enabled transitions 39856 [2023-09-01 09:04:53,231 INFO L134 LiptonReduction]: Checked pairs total: 161119 [2023-09-01 09:04:53,232 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-09-01 09:04:53,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:04:53,237 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:04:53,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:04:53,247 INFO L130 PetriNetUnfolder]: 13/109 cut-off events. [2023-09-01 09:04:53,248 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:04:53,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:04:53,248 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 09:04:53,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:04:53,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:04:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2014054127, now seen corresponding path program 1 times [2023-09-01 09:04:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:04:53,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282806464] [2023-09-01 09:04:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:04:53,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:04:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:53,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:04:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:53,342 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:04:53,346 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:04:53,346 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:04:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:04:53,346 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:04:53,347 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:04:53,347 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:04:53,347 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 09:04:53,389 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:04:53,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 297 transitions, 639 flow [2023-09-01 09:04:53,451 INFO L130 PetriNetUnfolder]: 31/355 cut-off events. [2023-09-01 09:04:53,451 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:04:53,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 355 events. 31/355 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1415 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 302. Up to 12 conditions per place. [2023-09-01 09:04:53,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 297 transitions, 639 flow [2023-09-01 09:04:53,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 297 transitions, 639 flow [2023-09-01 09:04:53,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:04:53,459 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 297 transitions, 639 flow [2023-09-01 09:04:53,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 297 transitions, 639 flow [2023-09-01 09:04:53,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 297 transitions, 639 flow [2023-09-01 09:04:53,507 INFO L130 PetriNetUnfolder]: 31/355 cut-off events. [2023-09-01 09:04:53,507 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:04:53,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 355 events. 31/355 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1415 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 302. Up to 12 conditions per place. [2023-09-01 09:04:53,526 INFO L119 LiptonReduction]: Number of co-enabled transitions 64130 [2023-09-01 09:04:58,152 INFO L134 LiptonReduction]: Checked pairs total: 272528 [2023-09-01 09:04:58,152 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-09-01 09:04:58,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:04:58,154 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:04:58,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:04:58,168 INFO L130 PetriNetUnfolder]: 19/144 cut-off events. [2023-09-01 09:04:58,168 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:04:58,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:04:58,168 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:04:58,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:04:58,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:04:58,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1536550184, now seen corresponding path program 1 times [2023-09-01 09:04:58,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:04:58,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164793791] [2023-09-01 09:04:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:04:58,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:04:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:58,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:04:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:58,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:04:58,206 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:04:58,206 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:04:58,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:04:58,207 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:04:58,207 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:04:58,207 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:04:58,208 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 09:04:58,258 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:04:58,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 351 transitions, 762 flow [2023-09-01 09:04:58,322 INFO L130 PetriNetUnfolder]: 37/421 cut-off events. [2023-09-01 09:04:58,323 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:04:58,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 421 events. 37/421 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1758 event pairs, 0 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 374. Up to 14 conditions per place. [2023-09-01 09:04:58,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 351 transitions, 762 flow [2023-09-01 09:04:58,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 351 transitions, 762 flow [2023-09-01 09:04:58,334 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:04:58,334 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 351 transitions, 762 flow [2023-09-01 09:04:58,334 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 351 transitions, 762 flow [2023-09-01 09:04:58,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 351 transitions, 762 flow [2023-09-01 09:04:58,409 INFO L130 PetriNetUnfolder]: 37/421 cut-off events. [2023-09-01 09:04:58,410 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:04:58,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 421 events. 37/421 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1758 event pairs, 0 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 374. Up to 14 conditions per place. [2023-09-01 09:04:58,436 INFO L119 LiptonReduction]: Number of co-enabled transitions 94128 [2023-09-01 09:05:03,820 INFO L134 LiptonReduction]: Checked pairs total: 389510 [2023-09-01 09:05:03,820 INFO L136 LiptonReduction]: Total number of compositions: 270 [2023-09-01 09:05:03,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:03,822 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:03,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:03,839 INFO L130 PetriNetUnfolder]: 20/169 cut-off events. [2023-09-01 09:05:03,840 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:05:03,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:03,840 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:03,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:03,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1147083698, now seen corresponding path program 1 times [2023-09-01 09:05:03,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:03,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459475007] [2023-09-01 09:05:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:03,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:03,869 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:03,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:03,894 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:03,899 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:03,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:05:03,900 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:03,901 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:03,902 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:03,902 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 09:05:03,961 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:03,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 384 places, 405 transitions, 887 flow [2023-09-01 09:05:04,044 INFO L130 PetriNetUnfolder]: 43/487 cut-off events. [2023-09-01 09:05:04,044 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:05:04,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 487 events. 43/487 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2076 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 449. Up to 16 conditions per place. [2023-09-01 09:05:04,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 384 places, 405 transitions, 887 flow [2023-09-01 09:05:04,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 384 places, 405 transitions, 887 flow [2023-09-01 09:05:04,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:04,058 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 384 places, 405 transitions, 887 flow [2023-09-01 09:05:04,059 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 384 places, 405 transitions, 887 flow [2023-09-01 09:05:04,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 384 places, 405 transitions, 887 flow [2023-09-01 09:05:04,156 INFO L130 PetriNetUnfolder]: 43/487 cut-off events. [2023-09-01 09:05:04,156 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:05:04,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 487 events. 43/487 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2076 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 449. Up to 16 conditions per place. [2023-09-01 09:05:04,187 INFO L119 LiptonReduction]: Number of co-enabled transitions 129850 [2023-09-01 09:05:10,194 INFO L134 LiptonReduction]: Checked pairs total: 546720 [2023-09-01 09:05:10,194 INFO L136 LiptonReduction]: Total number of compositions: 315 [2023-09-01 09:05:10,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:10,196 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:10,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:10,218 INFO L130 PetriNetUnfolder]: 28/208 cut-off events. [2023-09-01 09:05:10,219 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:05:10,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:10,219 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:10,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:10,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:10,220 INFO L85 PathProgramCache]: Analyzing trace with hash 302123598, now seen corresponding path program 1 times [2023-09-01 09:05:10,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:10,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636569797] [2023-09-01 09:05:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:10,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:10,245 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:10,261 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:10,262 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:10,262 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:10,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:05:10,262 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:10,263 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:10,263 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:10,263 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 09:05:10,305 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:10,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 459 transitions, 1014 flow [2023-09-01 09:05:10,414 INFO L130 PetriNetUnfolder]: 49/553 cut-off events. [2023-09-01 09:05:10,414 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:05:10,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 553 events. 49/553 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2391 event pairs, 0 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 525. Up to 18 conditions per place. [2023-09-01 09:05:10,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 435 places, 459 transitions, 1014 flow [2023-09-01 09:05:10,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 435 places, 459 transitions, 1014 flow [2023-09-01 09:05:10,433 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:10,433 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 435 places, 459 transitions, 1014 flow [2023-09-01 09:05:10,433 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 435 places, 459 transitions, 1014 flow [2023-09-01 09:05:10,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 459 transitions, 1014 flow [2023-09-01 09:05:10,558 INFO L130 PetriNetUnfolder]: 49/553 cut-off events. [2023-09-01 09:05:10,559 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:05:10,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 553 events. 49/553 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2391 event pairs, 0 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 525. Up to 18 conditions per place. [2023-09-01 09:05:10,604 INFO L119 LiptonReduction]: Number of co-enabled transitions 171296 [2023-09-01 09:05:17,391 INFO L134 LiptonReduction]: Checked pairs total: 724857 [2023-09-01 09:05:17,391 INFO L136 LiptonReduction]: Total number of compositions: 361 [2023-09-01 09:05:17,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:17,393 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:17,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:17,421 INFO L130 PetriNetUnfolder]: 32/239 cut-off events. [2023-09-01 09:05:17,421 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:05:17,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:17,421 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:17,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:17,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:17,422 INFO L85 PathProgramCache]: Analyzing trace with hash 204788950, now seen corresponding path program 1 times [2023-09-01 09:05:17,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:17,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917315506] [2023-09-01 09:05:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:17,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:17,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:17,456 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:17,456 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:17,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:17,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:05:17,457 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:17,458 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:17,458 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:17,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 09:05:17,501 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:17,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 486 places, 513 transitions, 1143 flow [2023-09-01 09:05:17,669 INFO L130 PetriNetUnfolder]: 55/619 cut-off events. [2023-09-01 09:05:17,670 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:05:17,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 619 events. 55/619 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2723 event pairs, 0 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 602. Up to 20 conditions per place. [2023-09-01 09:05:17,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 486 places, 513 transitions, 1143 flow [2023-09-01 09:05:17,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 486 places, 513 transitions, 1143 flow [2023-09-01 09:05:17,685 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:17,685 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 486 places, 513 transitions, 1143 flow [2023-09-01 09:05:17,685 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 486 places, 513 transitions, 1143 flow [2023-09-01 09:05:17,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 486 places, 513 transitions, 1143 flow [2023-09-01 09:05:17,813 INFO L130 PetriNetUnfolder]: 55/619 cut-off events. [2023-09-01 09:05:17,813 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:05:17,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 619 events. 55/619 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2723 event pairs, 0 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 602. Up to 20 conditions per place. [2023-09-01 09:05:17,857 INFO L119 LiptonReduction]: Number of co-enabled transitions 218466 [2023-09-01 09:05:25,248 INFO L134 LiptonReduction]: Checked pairs total: 941215 [2023-09-01 09:05:25,249 INFO L136 LiptonReduction]: Total number of compositions: 406 [2023-09-01 09:05:25,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:25,251 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:25,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:25,298 INFO L130 PetriNetUnfolder]: 38/274 cut-off events. [2023-09-01 09:05:25,299 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:05:25,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:25,299 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:25,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:25,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1800113142, now seen corresponding path program 1 times [2023-09-01 09:05:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:25,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209989220] [2023-09-01 09:05:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:25,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:25,334 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:25,363 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:25,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:25,363 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:25,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:05:25,364 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:25,366 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:25,367 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:25,367 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 09:05:25,417 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:25,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 537 places, 567 transitions, 1274 flow [2023-09-01 09:05:25,577 INFO L130 PetriNetUnfolder]: 61/685 cut-off events. [2023-09-01 09:05:25,577 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:05:25,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 685 events. 61/685 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3062 event pairs, 0 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 680. Up to 22 conditions per place. [2023-09-01 09:05:25,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 537 places, 567 transitions, 1274 flow [2023-09-01 09:05:25,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 537 places, 567 transitions, 1274 flow [2023-09-01 09:05:25,602 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:25,602 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 537 places, 567 transitions, 1274 flow [2023-09-01 09:05:25,602 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 537 places, 567 transitions, 1274 flow [2023-09-01 09:05:25,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 537 places, 567 transitions, 1274 flow [2023-09-01 09:05:25,776 INFO L130 PetriNetUnfolder]: 61/685 cut-off events. [2023-09-01 09:05:25,776 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:05:25,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 685 events. 61/685 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3062 event pairs, 0 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 680. Up to 22 conditions per place. [2023-09-01 09:05:25,851 INFO L119 LiptonReduction]: Number of co-enabled transitions 271360 [2023-09-01 09:05:34,098 INFO L134 LiptonReduction]: Checked pairs total: 1163148 [2023-09-01 09:05:34,098 INFO L136 LiptonReduction]: Total number of compositions: 444 [2023-09-01 09:05:34,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:34,100 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:34,100 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:34,132 INFO L130 PetriNetUnfolder]: 41/303 cut-off events. [2023-09-01 09:05:34,132 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:05:34,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:34,133 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:34,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:34,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1369158811, now seen corresponding path program 1 times [2023-09-01 09:05:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211155856] [2023-09-01 09:05:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:34,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:34,195 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:34,197 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:34,197 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:34,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:05:34,197 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:34,198 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:34,198 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:34,198 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 09:05:34,253 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:34,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 588 places, 621 transitions, 1407 flow [2023-09-01 09:05:34,461 INFO L130 PetriNetUnfolder]: 67/751 cut-off events. [2023-09-01 09:05:34,461 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:05:34,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 751 events. 67/751 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3386 event pairs, 0 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 759. Up to 24 conditions per place. [2023-09-01 09:05:34,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 588 places, 621 transitions, 1407 flow [2023-09-01 09:05:34,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 588 places, 621 transitions, 1407 flow [2023-09-01 09:05:34,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:34,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 588 places, 621 transitions, 1407 flow [2023-09-01 09:05:34,490 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 588 places, 621 transitions, 1407 flow [2023-09-01 09:05:34,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 588 places, 621 transitions, 1407 flow [2023-09-01 09:05:34,734 INFO L130 PetriNetUnfolder]: 67/751 cut-off events. [2023-09-01 09:05:34,734 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:05:34,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 751 events. 67/751 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3386 event pairs, 0 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 759. Up to 24 conditions per place. [2023-09-01 09:05:34,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 329978 [2023-09-01 09:05:43,935 INFO L134 LiptonReduction]: Checked pairs total: 1421495 [2023-09-01 09:05:43,935 INFO L136 LiptonReduction]: Total number of compositions: 487 [2023-09-01 09:05:43,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:43,937 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:43,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:43,983 INFO L130 PetriNetUnfolder]: 46/336 cut-off events. [2023-09-01 09:05:43,983 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:05:43,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:43,984 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:43,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:43,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1088212543, now seen corresponding path program 1 times [2023-09-01 09:05:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:43,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123803859] [2023-09-01 09:05:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:44,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:44,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:44,031 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:44,031 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:44,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 09:05:44,031 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:44,033 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:44,033 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:44,033 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 09:05:44,106 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:44,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 639 places, 675 transitions, 1542 flow [2023-09-01 09:05:44,288 INFO L130 PetriNetUnfolder]: 73/817 cut-off events. [2023-09-01 09:05:44,288 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:05:44,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 817 events. 73/817 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3705 event pairs, 0 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 839. Up to 26 conditions per place. [2023-09-01 09:05:44,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 639 places, 675 transitions, 1542 flow [2023-09-01 09:05:44,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 639 places, 675 transitions, 1542 flow [2023-09-01 09:05:44,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:44,317 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 639 places, 675 transitions, 1542 flow [2023-09-01 09:05:44,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 639 places, 675 transitions, 1542 flow [2023-09-01 09:05:44,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 639 places, 675 transitions, 1542 flow [2023-09-01 09:05:44,559 INFO L130 PetriNetUnfolder]: 73/817 cut-off events. [2023-09-01 09:05:44,559 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:05:44,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 817 events. 73/817 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3705 event pairs, 0 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 839. Up to 26 conditions per place. [2023-09-01 09:05:44,626 INFO L119 LiptonReduction]: Number of co-enabled transitions 394320 [2023-09-01 09:05:54,753 INFO L134 LiptonReduction]: Checked pairs total: 1736802 [2023-09-01 09:05:54,753 INFO L136 LiptonReduction]: Total number of compositions: 533 [2023-09-01 09:05:54,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:54,755 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:54,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:54,799 INFO L130 PetriNetUnfolder]: 52/371 cut-off events. [2023-09-01 09:05:54,799 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:05:54,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:54,799 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:54,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:54,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1287417228, now seen corresponding path program 1 times [2023-09-01 09:05:54,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:54,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307773369] [2023-09-01 09:05:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:54,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:54,815 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:54,833 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:54,833 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:54,833 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:54,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 09:05:54,834 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:54,834 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:54,834 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:54,835 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 09:05:54,906 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:54,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 690 places, 729 transitions, 1679 flow [2023-09-01 09:05:55,122 INFO L130 PetriNetUnfolder]: 79/883 cut-off events. [2023-09-01 09:05:55,122 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:05:55,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 883 events. 79/883 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4023 event pairs, 0 based on Foata normal form. 0/764 useless extension candidates. Maximal degree in co-relation 920. Up to 28 conditions per place. [2023-09-01 09:05:55,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 690 places, 729 transitions, 1679 flow [2023-09-01 09:05:55,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 690 places, 729 transitions, 1679 flow [2023-09-01 09:05:55,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:55,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 690 places, 729 transitions, 1679 flow [2023-09-01 09:05:55,155 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 690 places, 729 transitions, 1679 flow [2023-09-01 09:05:55,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 690 places, 729 transitions, 1679 flow [2023-09-01 09:05:55,364 INFO L130 PetriNetUnfolder]: 79/883 cut-off events. [2023-09-01 09:05:55,365 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:05:55,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 883 events. 79/883 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4023 event pairs, 0 based on Foata normal form. 0/764 useless extension candidates. Maximal degree in co-relation 920. Up to 28 conditions per place. [2023-09-01 09:05:55,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 464386 [2023-09-01 09:06:06,209 INFO L134 LiptonReduction]: Checked pairs total: 1964245 [2023-09-01 09:06:06,209 INFO L136 LiptonReduction]: Total number of compositions: 558 [2023-09-01 09:06:06,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:06:06,211 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:06:06,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:06:06,259 INFO L130 PetriNetUnfolder]: 52/394 cut-off events. [2023-09-01 09:06:06,260 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:06:06,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:06:06,260 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:06:06,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:06:06,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:06:06,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1271341591, now seen corresponding path program 1 times [2023-09-01 09:06:06,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:06:06,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977363953] [2023-09-01 09:06:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:06:06,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:06:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:06,291 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:06:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:06,334 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:06:06,334 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:06:06,334 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:06:06,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 09:06:06,335 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:06:06,335 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:06:06,335 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:06:06,335 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 09:06:06,404 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:06:06,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 741 places, 783 transitions, 1818 flow [2023-09-01 09:06:06,710 INFO L130 PetriNetUnfolder]: 85/949 cut-off events. [2023-09-01 09:06:06,710 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:06:06,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1097 conditions, 949 events. 85/949 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4392 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 1002. Up to 30 conditions per place. [2023-09-01 09:06:06,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 741 places, 783 transitions, 1818 flow [2023-09-01 09:06:06,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 741 places, 783 transitions, 1818 flow [2023-09-01 09:06:06,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:06:06,736 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 741 places, 783 transitions, 1818 flow [2023-09-01 09:06:06,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 741 places, 783 transitions, 1818 flow [2023-09-01 09:06:06,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 741 places, 783 transitions, 1818 flow [2023-09-01 09:06:06,959 INFO L130 PetriNetUnfolder]: 85/949 cut-off events. [2023-09-01 09:06:06,960 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:06:06,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1097 conditions, 949 events. 85/949 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4392 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 1002. Up to 30 conditions per place. [2023-09-01 09:06:07,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 540176 [2023-09-01 09:06:19,108 INFO L134 LiptonReduction]: Checked pairs total: 2306074 [2023-09-01 09:06:19,108 INFO L136 LiptonReduction]: Total number of compositions: 615 [2023-09-01 09:06:19,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:06:19,109 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:06:19,109 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:06:19,186 INFO L130 PetriNetUnfolder]: 61/435 cut-off events. [2023-09-01 09:06:19,186 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:06:19,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:06:19,186 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:06:19,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:06:19,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:06:19,187 INFO L85 PathProgramCache]: Analyzing trace with hash -761870189, now seen corresponding path program 1 times [2023-09-01 09:06:19,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:06:19,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534628246] [2023-09-01 09:06:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:06:19,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:06:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:19,209 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:06:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:19,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:06:19,233 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:06:19,233 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:06:19,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 09:06:19,233 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:06:19,234 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:06:19,234 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:06:19,234 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 09:06:19,308 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:06:19,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 792 places, 837 transitions, 1959 flow [2023-09-01 09:06:19,662 INFO L130 PetriNetUnfolder]: 91/1015 cut-off events. [2023-09-01 09:06:19,662 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:06:19,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 1015 events. 91/1015 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4669 event pairs, 0 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 1085. Up to 32 conditions per place. [2023-09-01 09:06:19,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 792 places, 837 transitions, 1959 flow [2023-09-01 09:06:19,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 792 places, 837 transitions, 1959 flow [2023-09-01 09:06:19,703 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:06:19,703 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 792 places, 837 transitions, 1959 flow [2023-09-01 09:06:19,704 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 792 places, 837 transitions, 1959 flow [2023-09-01 09:06:19,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 792 places, 837 transitions, 1959 flow [2023-09-01 09:06:20,000 INFO L130 PetriNetUnfolder]: 91/1015 cut-off events. [2023-09-01 09:06:20,000 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:06:20,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 1015 events. 91/1015 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4669 event pairs, 0 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 1085. Up to 32 conditions per place. [2023-09-01 09:06:20,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 621690 [2023-09-01 09:06:32,827 INFO L134 LiptonReduction]: Checked pairs total: 2745292 [2023-09-01 09:06:32,827 INFO L136 LiptonReduction]: Total number of compositions: 660 [2023-09-01 09:06:32,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:06:32,830 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:06:32,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:06:32,897 INFO L130 PetriNetUnfolder]: 68/472 cut-off events. [2023-09-01 09:06:32,898 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:06:32,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:06:32,898 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] [2023-09-01 09:06:32,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:06:32,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:06:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash 711010166, now seen corresponding path program 1 times [2023-09-01 09:06:32,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:06:32,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145408455] [2023-09-01 09:06:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:06:32,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:06:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:32,920 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:06:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:32,946 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:06:32,947 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:06:32,947 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:06:32,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 09:06:32,947 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:06:32,948 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:06:32,948 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:06:32,948 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 09:06:33,025 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:06:33,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 843 places, 891 transitions, 2102 flow [2023-09-01 09:06:33,415 INFO L130 PetriNetUnfolder]: 97/1081 cut-off events. [2023-09-01 09:06:33,415 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:06:33,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 1081 events. 97/1081 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5057 event pairs, 0 based on Foata normal form. 0/935 useless extension candidates. Maximal degree in co-relation 1169. Up to 34 conditions per place. [2023-09-01 09:06:33,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 843 places, 891 transitions, 2102 flow [2023-09-01 09:06:33,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 843 places, 891 transitions, 2102 flow [2023-09-01 09:06:33,458 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:06:33,458 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 843 places, 891 transitions, 2102 flow [2023-09-01 09:06:33,458 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 843 places, 891 transitions, 2102 flow [2023-09-01 09:06:33,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 843 places, 891 transitions, 2102 flow [2023-09-01 09:06:33,791 INFO L130 PetriNetUnfolder]: 97/1081 cut-off events. [2023-09-01 09:06:33,791 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:06:33,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 1081 events. 97/1081 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5057 event pairs, 0 based on Foata normal form. 0/935 useless extension candidates. Maximal degree in co-relation 1169. Up to 34 conditions per place. [2023-09-01 09:06:33,903 INFO L119 LiptonReduction]: Number of co-enabled transitions 708928 [2023-09-01 09:06:47,265 INFO L134 LiptonReduction]: Checked pairs total: 3141824 [2023-09-01 09:06:47,266 INFO L136 LiptonReduction]: Total number of compositions: 696 [2023-09-01 09:06:47,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:06:47,270 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:06:47,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:06:47,345 INFO L130 PetriNetUnfolder]: 70/499 cut-off events. [2023-09-01 09:06:47,345 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:06:47,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:06:47,345 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] [2023-09-01 09:06:47,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:06:47,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:06:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash 316368113, now seen corresponding path program 1 times [2023-09-01 09:06:47,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:06:47,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579606860] [2023-09-01 09:06:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:06:47,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:06:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:47,369 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:06:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:47,396 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:06:47,396 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:06:47,397 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:06:47,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 09:06:47,397 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:06:47,397 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:06:47,397 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:06:47,398 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 09:06:47,475 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:06:47,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 894 places, 945 transitions, 2247 flow [2023-09-01 09:06:47,901 INFO L130 PetriNetUnfolder]: 103/1147 cut-off events. [2023-09-01 09:06:47,901 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:06:47,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 1147 events. 103/1147 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5380 event pairs, 0 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 1254. Up to 36 conditions per place. [2023-09-01 09:06:47,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 894 places, 945 transitions, 2247 flow [2023-09-01 09:06:47,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 894 places, 945 transitions, 2247 flow [2023-09-01 09:06:47,955 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:06:47,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 894 places, 945 transitions, 2247 flow [2023-09-01 09:06:47,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 894 places, 945 transitions, 2247 flow [2023-09-01 09:06:47,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 894 places, 945 transitions, 2247 flow [2023-09-01 09:06:48,319 INFO L130 PetriNetUnfolder]: 103/1147 cut-off events. [2023-09-01 09:06:48,320 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:06:48,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 1147 events. 103/1147 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5380 event pairs, 0 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 1254. Up to 36 conditions per place. [2023-09-01 09:06:48,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 801890 [2023-09-01 09:07:03,297 INFO L134 LiptonReduction]: Checked pairs total: 3368835 [2023-09-01 09:07:03,298 INFO L136 LiptonReduction]: Total number of compositions: 736 [2023-09-01 09:07:03,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:07:03,299 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:07:03,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:07:03,384 INFO L130 PetriNetUnfolder]: 71/524 cut-off events. [2023-09-01 09:07:03,384 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:07:03,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:07:03,384 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] [2023-09-01 09:07:03,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:07:03,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:07:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1669694681, now seen corresponding path program 1 times [2023-09-01 09:07:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:07:03,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755364933] [2023-09-01 09:07:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:07:03,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:07:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:03,406 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:07:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:03,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:07:03,436 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:07:03,436 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:07:03,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 09:07:03,437 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:07:03,437 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:07:03,437 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:07:03,437 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 09:07:03,518 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:07:03,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 999 transitions, 2394 flow [2023-09-01 09:07:03,915 INFO L130 PetriNetUnfolder]: 109/1213 cut-off events. [2023-09-01 09:07:03,915 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:07:03,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 1213 events. 109/1213 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5667 event pairs, 0 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 1340. Up to 38 conditions per place. [2023-09-01 09:07:03,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 945 places, 999 transitions, 2394 flow [2023-09-01 09:07:03,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 945 places, 999 transitions, 2394 flow [2023-09-01 09:07:03,959 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:07:03,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 945 places, 999 transitions, 2394 flow [2023-09-01 09:07:03,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 945 places, 999 transitions, 2394 flow [2023-09-01 09:07:03,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 945 places, 999 transitions, 2394 flow [2023-09-01 09:07:04,329 INFO L130 PetriNetUnfolder]: 109/1213 cut-off events. [2023-09-01 09:07:04,330 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:07:04,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 1213 events. 109/1213 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5667 event pairs, 0 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 1340. Up to 38 conditions per place. [2023-09-01 09:07:04,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 900576 [2023-09-01 09:07:19,924 INFO L134 LiptonReduction]: Checked pairs total: 3987271 [2023-09-01 09:07:19,925 INFO L136 LiptonReduction]: Total number of compositions: 782 [2023-09-01 09:07:19,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:07:19,926 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:07:19,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:07:20,019 INFO L130 PetriNetUnfolder]: 81/567 cut-off events. [2023-09-01 09:07:20,019 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:07:20,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:07:20,020 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] [2023-09-01 09:07:20,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:07:20,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:07:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash 842442788, now seen corresponding path program 1 times [2023-09-01 09:07:20,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:07:20,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443134222] [2023-09-01 09:07:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:07:20,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:07:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:20,046 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:07:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:20,077 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:07:20,077 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:07:20,078 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:07:20,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 09:07:20,078 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:07:20,078 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:07:20,078 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:07:20,078 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 09:07:20,166 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:07:20,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 996 places, 1053 transitions, 2543 flow [2023-09-01 09:07:20,593 INFO L130 PetriNetUnfolder]: 115/1279 cut-off events. [2023-09-01 09:07:20,593 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:07:20,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 1279 events. 115/1279 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6019 event pairs, 0 based on Foata normal form. 0/1106 useless extension candidates. Maximal degree in co-relation 1427. Up to 40 conditions per place. [2023-09-01 09:07:20,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 996 places, 1053 transitions, 2543 flow [2023-09-01 09:07:20,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 996 places, 1053 transitions, 2543 flow [2023-09-01 09:07:20,650 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:07:20,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 996 places, 1053 transitions, 2543 flow [2023-09-01 09:07:20,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 996 places, 1053 transitions, 2543 flow [2023-09-01 09:07:20,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 996 places, 1053 transitions, 2543 flow [2023-09-01 09:07:21,056 INFO L130 PetriNetUnfolder]: 115/1279 cut-off events. [2023-09-01 09:07:21,056 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:07:21,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 1279 events. 115/1279 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6019 event pairs, 0 based on Foata normal form. 0/1106 useless extension candidates. Maximal degree in co-relation 1427. Up to 40 conditions per place. [2023-09-01 09:07:21,345 INFO L119 LiptonReduction]: Number of co-enabled transitions 1004986 [2023-09-01 09:07:37,764 INFO L134 LiptonReduction]: Checked pairs total: 4349928 [2023-09-01 09:07:37,764 INFO L136 LiptonReduction]: Total number of compositions: 826 [2023-09-01 09:07:37,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:07:37,765 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:07:37,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:07:37,866 INFO L130 PetriNetUnfolder]: 83/594 cut-off events. [2023-09-01 09:07:37,866 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:07:37,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:07:37,866 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] [2023-09-01 09:07:37,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:07:37,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:07:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash 792882992, now seen corresponding path program 1 times [2023-09-01 09:07:37,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:07:37,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579390122] [2023-09-01 09:07:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:07:37,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:07:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:37,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:07:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:37,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:07:37,925 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:07:37,925 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:07:37,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 09:07:37,926 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:07:37,926 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:07:37,926 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:07:37,926 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 09:07:38,020 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:07:38,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1047 places, 1107 transitions, 2694 flow [2023-09-01 09:07:38,608 INFO L130 PetriNetUnfolder]: 121/1345 cut-off events. [2023-09-01 09:07:38,608 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:07:38,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 1345 events. 121/1345 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6321 event pairs, 0 based on Foata normal form. 0/1163 useless extension candidates. Maximal degree in co-relation 1515. Up to 42 conditions per place. [2023-09-01 09:07:38,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 1047 places, 1107 transitions, 2694 flow [2023-09-01 09:07:38,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1047 places, 1107 transitions, 2694 flow [2023-09-01 09:07:38,673 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:07:38,673 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1047 places, 1107 transitions, 2694 flow [2023-09-01 09:07:38,673 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1047 places, 1107 transitions, 2694 flow [2023-09-01 09:07:38,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1047 places, 1107 transitions, 2694 flow [2023-09-01 09:07:39,113 INFO L130 PetriNetUnfolder]: 121/1345 cut-off events. [2023-09-01 09:07:39,113 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:07:39,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 1345 events. 121/1345 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6321 event pairs, 0 based on Foata normal form. 0/1163 useless extension candidates. Maximal degree in co-relation 1515. Up to 42 conditions per place. [2023-09-01 09:07:39,580 INFO L119 LiptonReduction]: Number of co-enabled transitions 1115120 [2023-09-01 09:07:56,706 INFO L134 LiptonReduction]: Checked pairs total: 4904836 [2023-09-01 09:07:56,706 INFO L136 LiptonReduction]: Total number of compositions: 861 [2023-09-01 09:07:56,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:07:56,709 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:07:56,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:07:56,821 INFO L130 PetriNetUnfolder]: 87/625 cut-off events. [2023-09-01 09:07:56,821 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:07:56,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:07:56,821 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] [2023-09-01 09:07:56,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:07:56,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:07:56,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1955234961, now seen corresponding path program 1 times [2023-09-01 09:07:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:07:56,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240150746] [2023-09-01 09:07:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:07:56,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:07:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:56,863 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:07:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:56,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:07:56,896 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:07:56,897 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:07:56,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 09:07:56,897 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:07:56,897 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:07:56,897 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:07:56,898 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 09:07:56,994 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:07:57,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1098 places, 1161 transitions, 2847 flow [2023-09-01 09:07:57,498 INFO L130 PetriNetUnfolder]: 127/1411 cut-off events. [2023-09-01 09:07:57,498 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:07:57,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1706 conditions, 1411 events. 127/1411 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6662 event pairs, 0 based on Foata normal form. 0/1220 useless extension candidates. Maximal degree in co-relation 1604. Up to 44 conditions per place. [2023-09-01 09:07:57,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 1098 places, 1161 transitions, 2847 flow [2023-09-01 09:07:57,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1098 places, 1161 transitions, 2847 flow [2023-09-01 09:07:57,579 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:07:57,580 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1098 places, 1161 transitions, 2847 flow [2023-09-01 09:07:57,580 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1098 places, 1161 transitions, 2847 flow [2023-09-01 09:07:57,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1098 places, 1161 transitions, 2847 flow [2023-09-01 09:07:58,106 INFO L130 PetriNetUnfolder]: 127/1411 cut-off events. [2023-09-01 09:07:58,107 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:07:58,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1706 conditions, 1411 events. 127/1411 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6662 event pairs, 0 based on Foata normal form. 0/1220 useless extension candidates. Maximal degree in co-relation 1604. Up to 44 conditions per place. [2023-09-01 09:07:58,378 INFO L119 LiptonReduction]: Number of co-enabled transitions 1230978 [2023-09-01 09:08:16,925 INFO L134 LiptonReduction]: Checked pairs total: 5320480 [2023-09-01 09:08:16,926 INFO L136 LiptonReduction]: Total number of compositions: 909 [2023-09-01 09:08:16,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:08:16,928 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:08:16,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:08:17,101 INFO L130 PetriNetUnfolder]: 91/656 cut-off events. [2023-09-01 09:08:17,102 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:08:17,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:08:17,102 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] [2023-09-01 09:08:17,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:08:17,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:08:17,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1042004491, now seen corresponding path program 1 times [2023-09-01 09:08:17,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:08:17,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247101233] [2023-09-01 09:08:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:08:17,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:08:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:08:17,132 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:08:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:08:17,167 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:08:17,167 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:08:17,167 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:08:17,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 09:08:17,168 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:08:17,168 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:08:17,168 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:08:17,168 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 09:08:17,345 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:08:17,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1149 places, 1215 transitions, 3002 flow [2023-09-01 09:08:17,976 INFO L130 PetriNetUnfolder]: 133/1477 cut-off events. [2023-09-01 09:08:17,976 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:08:18,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 1477 events. 133/1477 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7056 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1694. Up to 46 conditions per place. [2023-09-01 09:08:18,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 1149 places, 1215 transitions, 3002 flow [2023-09-01 09:08:18,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1149 places, 1215 transitions, 3002 flow [2023-09-01 09:08:18,069 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:08:18,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1149 places, 1215 transitions, 3002 flow [2023-09-01 09:08:18,069 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1149 places, 1215 transitions, 3002 flow [2023-09-01 09:08:18,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1149 places, 1215 transitions, 3002 flow [2023-09-01 09:08:18,690 INFO L130 PetriNetUnfolder]: 133/1477 cut-off events. [2023-09-01 09:08:18,690 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:08:18,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 1477 events. 133/1477 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7056 event pairs, 0 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 1694. Up to 46 conditions per place. [2023-09-01 09:08:18,922 INFO L119 LiptonReduction]: Number of co-enabled transitions 1352560 [2023-09-01 09:08:38,570 INFO L134 LiptonReduction]: Checked pairs total: 5896490 [2023-09-01 09:08:38,571 INFO L136 LiptonReduction]: Total number of compositions: 952 [2023-09-01 09:08:38,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:08:38,572 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:08:38,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:08:38,743 INFO L130 PetriNetUnfolder]: 97/691 cut-off events. [2023-09-01 09:08:38,743 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:08:38,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:08:38,744 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:08:38,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:08:38,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:08:38,744 INFO L85 PathProgramCache]: Analyzing trace with hash 699729989, now seen corresponding path program 1 times [2023-09-01 09:08:38,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:08:38,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971752623] [2023-09-01 09:08:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:08:38,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:08:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:08:38,783 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:08:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:08:38,819 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:08:38,819 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:08:38,820 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:08:38,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 09:08:38,820 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:08:38,820 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:08:38,821 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:08:38,821 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 09:08:38,923 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:08:38,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1200 places, 1269 transitions, 3159 flow [2023-09-01 09:08:39,598 INFO L130 PetriNetUnfolder]: 139/1543 cut-off events. [2023-09-01 09:08:39,598 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:08:39,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 1543 events. 139/1543 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7336 event pairs, 0 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 1785. Up to 48 conditions per place. [2023-09-01 09:08:39,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 1200 places, 1269 transitions, 3159 flow [2023-09-01 09:08:39,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1200 places, 1269 transitions, 3159 flow [2023-09-01 09:08:39,697 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:08:39,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1200 places, 1269 transitions, 3159 flow [2023-09-01 09:08:39,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1200 places, 1269 transitions, 3159 flow [2023-09-01 09:08:39,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1200 places, 1269 transitions, 3159 flow [2023-09-01 09:08:40,388 INFO L130 PetriNetUnfolder]: 139/1543 cut-off events. [2023-09-01 09:08:40,388 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:08:40,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 1543 events. 139/1543 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7336 event pairs, 0 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 1785. Up to 48 conditions per place. [2023-09-01 09:08:40,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 1479866 [2023-09-01 09:09:01,131 INFO L134 LiptonReduction]: Checked pairs total: 6425027 [2023-09-01 09:09:01,132 INFO L136 LiptonReduction]: Total number of compositions: 997 [2023-09-01 09:09:01,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:09:01,133 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:09:01,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:09:01,286 INFO L130 PetriNetUnfolder]: 102/724 cut-off events. [2023-09-01 09:09:01,286 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:09:01,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:09:01,286 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:09:01,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:09:01,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:09:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2070470009, now seen corresponding path program 1 times [2023-09-01 09:09:01,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:09:01,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446164689] [2023-09-01 09:09:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:09:01,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:09:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:01,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:09:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:01,361 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:09:01,361 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:09:01,362 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:09:01,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 09:09:01,362 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:09:01,362 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:09:01,362 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:09:01,362 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 09:09:01,467 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:09:01,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1251 places, 1323 transitions, 3318 flow [2023-09-01 09:09:02,292 INFO L130 PetriNetUnfolder]: 145/1609 cut-off events. [2023-09-01 09:09:02,292 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:09:02,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1982 conditions, 1609 events. 145/1609 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7651 event pairs, 0 based on Foata normal form. 0/1391 useless extension candidates. Maximal degree in co-relation 1877. Up to 50 conditions per place. [2023-09-01 09:09:02,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 1251 places, 1323 transitions, 3318 flow [2023-09-01 09:09:02,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1251 places, 1323 transitions, 3318 flow [2023-09-01 09:09:02,406 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:09:02,407 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1251 places, 1323 transitions, 3318 flow [2023-09-01 09:09:02,407 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1251 places, 1323 transitions, 3318 flow [2023-09-01 09:09:02,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1251 places, 1323 transitions, 3318 flow [2023-09-01 09:09:03,183 INFO L130 PetriNetUnfolder]: 145/1609 cut-off events. [2023-09-01 09:09:03,184 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:09:03,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1982 conditions, 1609 events. 145/1609 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7651 event pairs, 0 based on Foata normal form. 0/1391 useless extension candidates. Maximal degree in co-relation 1877. Up to 50 conditions per place. [2023-09-01 09:09:03,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 1612896 [2023-09-01 09:09:25,486 INFO L134 LiptonReduction]: Checked pairs total: 6893787 [2023-09-01 09:09:25,487 INFO L136 LiptonReduction]: Total number of compositions: 1024 [2023-09-01 09:09:25,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:09:25,488 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:09:25,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:09:25,646 INFO L130 PetriNetUnfolder]: 105/753 cut-off events. [2023-09-01 09:09:25,647 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:09:25,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:09:25,647 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:09:25,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:09:25,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:09:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash 98462057, now seen corresponding path program 1 times [2023-09-01 09:09:25,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:09:25,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577553194] [2023-09-01 09:09:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:09:25,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:09:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:25,682 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:09:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:25,727 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:09:25,727 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:09:25,727 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:09:25,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 09:09:25,728 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:09:25,728 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:09:25,728 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:09:25,728 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 09:09:25,839 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:09:25,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1302 places, 1377 transitions, 3479 flow [2023-09-01 09:09:26,786 INFO L130 PetriNetUnfolder]: 151/1675 cut-off events. [2023-09-01 09:09:26,787 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:09:26,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1675 events. 151/1675 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7979 event pairs, 0 based on Foata normal form. 0/1448 useless extension candidates. Maximal degree in co-relation 1970. Up to 52 conditions per place. [2023-09-01 09:09:26,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 1302 places, 1377 transitions, 3479 flow [2023-09-01 09:09:26,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1302 places, 1377 transitions, 3479 flow [2023-09-01 09:09:26,863 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:09:26,864 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1302 places, 1377 transitions, 3479 flow [2023-09-01 09:09:26,864 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1302 places, 1377 transitions, 3479 flow [2023-09-01 09:09:26,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1302 places, 1377 transitions, 3479 flow [2023-09-01 09:09:27,587 INFO L130 PetriNetUnfolder]: 151/1675 cut-off events. [2023-09-01 09:09:27,587 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:09:27,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1675 events. 151/1675 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7979 event pairs, 0 based on Foata normal form. 0/1448 useless extension candidates. Maximal degree in co-relation 1970. Up to 52 conditions per place. [2023-09-01 09:09:28,003 INFO L119 LiptonReduction]: Number of co-enabled transitions 1751650 [2023-09-01 09:09:50,920 INFO L134 LiptonReduction]: Checked pairs total: 7649341 [2023-09-01 09:09:50,921 INFO L136 LiptonReduction]: Total number of compositions: 1085 [2023-09-01 09:09:50,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:09:50,923 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:09:50,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:09:51,114 INFO L130 PetriNetUnfolder]: 112/790 cut-off events. [2023-09-01 09:09:51,115 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:09:51,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:09:51,115 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:09:51,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:09:51,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:09:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1137508989, now seen corresponding path program 1 times [2023-09-01 09:09:51,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:09:51,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203961412] [2023-09-01 09:09:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:09:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:09:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:51,151 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:09:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:51,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:09:51,198 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:09:51,198 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:09:51,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 09:09:51,199 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:09:51,199 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:09:51,199 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:09:51,200 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 09:09:51,314 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:09:51,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1353 places, 1431 transitions, 3642 flow [2023-09-01 09:09:52,220 INFO L130 PetriNetUnfolder]: 157/1741 cut-off events. [2023-09-01 09:09:52,221 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:09:52,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2171 conditions, 1741 events. 157/1741 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8330 event pairs, 0 based on Foata normal form. 0/1505 useless extension candidates. Maximal degree in co-relation 2064. Up to 54 conditions per place. [2023-09-01 09:09:52,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 1353 places, 1431 transitions, 3642 flow [2023-09-01 09:09:52,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1353 places, 1431 transitions, 3642 flow [2023-09-01 09:09:52,304 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:09:52,304 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1353 places, 1431 transitions, 3642 flow [2023-09-01 09:09:52,304 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1353 places, 1431 transitions, 3642 flow [2023-09-01 09:09:52,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1353 places, 1431 transitions, 3642 flow [2023-09-01 09:09:53,074 INFO L130 PetriNetUnfolder]: 157/1741 cut-off events. [2023-09-01 09:09:53,074 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:09:53,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2171 conditions, 1741 events. 157/1741 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8330 event pairs, 0 based on Foata normal form. 0/1505 useless extension candidates. Maximal degree in co-relation 2064. Up to 54 conditions per place. [2023-09-01 09:09:53,707 INFO L119 LiptonReduction]: Number of co-enabled transitions 1896128 [2023-09-01 09:10:17,867 INFO L134 LiptonReduction]: Checked pairs total: 8328014 [2023-09-01 09:10:17,867 INFO L136 LiptonReduction]: Total number of compositions: 1136 [2023-09-01 09:10:17,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:10:17,869 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:10:17,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:10:18,062 INFO L130 PetriNetUnfolder]: 119/827 cut-off events. [2023-09-01 09:10:18,062 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:10:18,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:10:18,063 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:10:18,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:10:18,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:10:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash 89884604, now seen corresponding path program 1 times [2023-09-01 09:10:18,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:10:18,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655620446] [2023-09-01 09:10:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:10:18,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:10:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:10:18,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:10:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:10:18,147 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:10:18,147 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:10:18,147 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:10:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 09:10:18,148 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:10:18,148 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:10:18,148 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:10:18,148 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-09-01 09:10:18,266 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:10:18,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1404 places, 1485 transitions, 3807 flow [2023-09-01 09:10:19,184 INFO L130 PetriNetUnfolder]: 163/1807 cut-off events. [2023-09-01 09:10:19,184 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:10:19,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 1807 events. 163/1807 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8592 event pairs, 0 based on Foata normal form. 0/1562 useless extension candidates. Maximal degree in co-relation 2159. Up to 56 conditions per place. [2023-09-01 09:10:19,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 1404 places, 1485 transitions, 3807 flow [2023-09-01 09:10:19,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1404 places, 1485 transitions, 3807 flow [2023-09-01 09:10:19,309 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:10:19,309 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1404 places, 1485 transitions, 3807 flow [2023-09-01 09:10:19,309 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1404 places, 1485 transitions, 3807 flow [2023-09-01 09:10:19,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1404 places, 1485 transitions, 3807 flow [2023-09-01 09:10:20,281 INFO L130 PetriNetUnfolder]: 163/1807 cut-off events. [2023-09-01 09:10:20,281 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:10:20,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 1807 events. 163/1807 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8592 event pairs, 0 based on Foata normal form. 0/1562 useless extension candidates. Maximal degree in co-relation 2159. Up to 56 conditions per place. [2023-09-01 09:10:20,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 2046330 [2023-09-01 09:10:45,501 INFO L134 LiptonReduction]: Checked pairs total: 9076233 [2023-09-01 09:10:45,501 INFO L136 LiptonReduction]: Total number of compositions: 1162 [2023-09-01 09:10:45,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:10:45,503 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:10:45,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:10:45,709 INFO L130 PetriNetUnfolder]: 126/864 cut-off events. [2023-09-01 09:10:45,709 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:10:45,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:10:45,709 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:10:45,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:10:45,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:10:45,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1285741775, now seen corresponding path program 1 times [2023-09-01 09:10:45,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:10:45,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126002724] [2023-09-01 09:10:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:10:45,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:10:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:10:45,744 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:10:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:10:45,798 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:10:45,799 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:10:45,799 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:10:45,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 09:10:45,799 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:10:45,800 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:10:45,800 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:10:45,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-09-01 09:10:45,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:10:45,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1455 places, 1539 transitions, 3974 flow [2023-09-01 09:10:46,986 INFO L130 PetriNetUnfolder]: 169/1873 cut-off events. [2023-09-01 09:10:46,987 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:10:47,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2364 conditions, 1873 events. 169/1873 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8972 event pairs, 0 based on Foata normal form. 0/1619 useless extension candidates. Maximal degree in co-relation 2255. Up to 58 conditions per place. [2023-09-01 09:10:47,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 1455 places, 1539 transitions, 3974 flow [2023-09-01 09:10:47,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1455 places, 1539 transitions, 3974 flow [2023-09-01 09:10:47,089 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:10:47,089 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1455 places, 1539 transitions, 3974 flow [2023-09-01 09:10:47,089 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1455 places, 1539 transitions, 3974 flow [2023-09-01 09:10:47,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1455 places, 1539 transitions, 3974 flow [2023-09-01 09:10:48,158 INFO L130 PetriNetUnfolder]: 169/1873 cut-off events. [2023-09-01 09:10:48,158 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:10:48,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2364 conditions, 1873 events. 169/1873 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8972 event pairs, 0 based on Foata normal form. 0/1619 useless extension candidates. Maximal degree in co-relation 2255. Up to 58 conditions per place. [2023-09-01 09:10:48,518 INFO L119 LiptonReduction]: Number of co-enabled transitions 2202256 [2023-09-01 09:11:14,605 INFO L134 LiptonReduction]: Checked pairs total: 9606495 [2023-09-01 09:11:14,605 INFO L136 LiptonReduction]: Total number of compositions: 1207 [2023-09-01 09:11:14,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:11:14,606 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:11:14,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:11:14,827 INFO L130 PetriNetUnfolder]: 128/891 cut-off events. [2023-09-01 09:11:14,827 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:11:14,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:11:14,828 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:11:14,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:11:14,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:11:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash -502741070, now seen corresponding path program 1 times [2023-09-01 09:11:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:11:14,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794929783] [2023-09-01 09:11:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:11:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:11:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:11:14,861 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:11:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:11:14,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:11:14,915 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:11:14,915 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:11:14,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 09:11:14,916 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:11:14,916 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:11:14,916 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:11:14,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-09-01 09:11:15,040 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:11:15,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1506 places, 1593 transitions, 4143 flow [2023-09-01 09:11:16,198 INFO L130 PetriNetUnfolder]: 175/1939 cut-off events. [2023-09-01 09:11:16,198 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:11:16,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2462 conditions, 1939 events. 175/1939 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9258 event pairs, 0 based on Foata normal form. 0/1676 useless extension candidates. Maximal degree in co-relation 2352. Up to 60 conditions per place. [2023-09-01 09:11:16,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 1506 places, 1593 transitions, 4143 flow [2023-09-01 09:11:16,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1506 places, 1593 transitions, 4143 flow [2023-09-01 09:11:16,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:11:16,373 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1506 places, 1593 transitions, 4143 flow [2023-09-01 09:11:16,373 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1506 places, 1593 transitions, 4143 flow [2023-09-01 09:11:16,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1506 places, 1593 transitions, 4143 flow [2023-09-01 09:11:17,446 INFO L130 PetriNetUnfolder]: 175/1939 cut-off events. [2023-09-01 09:11:17,447 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:11:17,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2462 conditions, 1939 events. 175/1939 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9258 event pairs, 0 based on Foata normal form. 0/1676 useless extension candidates. Maximal degree in co-relation 2352. Up to 60 conditions per place. [2023-09-01 09:11:17,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 2363906 [2023-09-01 09:11:45,027 INFO L134 LiptonReduction]: Checked pairs total: 10308678 [2023-09-01 09:11:45,027 INFO L136 LiptonReduction]: Total number of compositions: 1246 [2023-09-01 09:11:45,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:11:45,029 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:11:45,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:11:45,257 INFO L130 PetriNetUnfolder]: 129/916 cut-off events. [2023-09-01 09:11:45,257 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:11:45,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:11:45,257 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:11:45,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:11:45,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:11:45,258 INFO L85 PathProgramCache]: Analyzing trace with hash -273652268, now seen corresponding path program 1 times [2023-09-01 09:11:45,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:11:45,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139443120] [2023-09-01 09:11:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:11:45,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:11:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:11:45,296 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:11:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:11:45,350 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:11:45,350 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:11:45,350 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:11:45,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-09-01 09:11:45,350 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:11:45,351 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:11:45,351 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:11:45,351 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-09-01 09:11:45,472 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:11:45,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1557 places, 1647 transitions, 4314 flow [2023-09-01 09:11:46,721 INFO L130 PetriNetUnfolder]: 181/2005 cut-off events. [2023-09-01 09:11:46,722 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 09:11:46,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2561 conditions, 2005 events. 181/2005 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9562 event pairs, 0 based on Foata normal form. 0/1733 useless extension candidates. Maximal degree in co-relation 2450. Up to 62 conditions per place. [2023-09-01 09:11:46,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 1557 places, 1647 transitions, 4314 flow [2023-09-01 09:11:46,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1557 places, 1647 transitions, 4314 flow [2023-09-01 09:11:46,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:11:46,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1557 places, 1647 transitions, 4314 flow [2023-09-01 09:11:46,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1557 places, 1647 transitions, 4314 flow [2023-09-01 09:11:46,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1557 places, 1647 transitions, 4314 flow [2023-09-01 09:11:48,065 INFO L130 PetriNetUnfolder]: 181/2005 cut-off events. [2023-09-01 09:11:48,065 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 09:11:48,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2561 conditions, 2005 events. 181/2005 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9562 event pairs, 0 based on Foata normal form. 0/1733 useless extension candidates. Maximal degree in co-relation 2450. Up to 62 conditions per place. [2023-09-01 09:11:49,092 INFO L119 LiptonReduction]: Number of co-enabled transitions 2531280 [2023-09-01 09:12:17,484 INFO L134 LiptonReduction]: Checked pairs total: 10954785 [2023-09-01 09:12:17,484 INFO L136 LiptonReduction]: Total number of compositions: 1278 [2023-09-01 09:12:17,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:12:17,486 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:12:17,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:12:17,802 INFO L130 PetriNetUnfolder]: 130/941 cut-off events. [2023-09-01 09:12:17,802 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 09:12:17,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:12:17,802 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:12:17,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:12:17,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:12:17,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1209971367, now seen corresponding path program 1 times [2023-09-01 09:12:17,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:12:17,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99208474] [2023-09-01 09:12:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:12:17,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:12:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:12:17,841 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:12:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:12:17,897 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:12:17,898 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:12:17,898 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:12:17,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-09-01 09:12:17,898 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:12:17,899 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:12:17,899 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:12:17,899 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-09-01 09:12:18,035 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:12:18,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1608 places, 1701 transitions, 4487 flow [2023-09-01 09:12:19,506 INFO L130 PetriNetUnfolder]: 187/2071 cut-off events. [2023-09-01 09:12:19,506 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 09:12:19,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2661 conditions, 2071 events. 187/2071 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9724 event pairs, 0 based on Foata normal form. 0/1790 useless extension candidates. Maximal degree in co-relation 2549. Up to 64 conditions per place. [2023-09-01 09:12:19,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 1608 places, 1701 transitions, 4487 flow [2023-09-01 09:12:19,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1608 places, 1701 transitions, 4487 flow [2023-09-01 09:12:19,614 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:12:19,614 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1608 places, 1701 transitions, 4487 flow [2023-09-01 09:12:19,614 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1608 places, 1701 transitions, 4487 flow [2023-09-01 09:12:19,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1608 places, 1701 transitions, 4487 flow [2023-09-01 09:12:20,931 INFO L130 PetriNetUnfolder]: 187/2071 cut-off events. [2023-09-01 09:12:20,931 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 09:12:21,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2661 conditions, 2071 events. 187/2071 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9724 event pairs, 0 based on Foata normal form. 0/1790 useless extension candidates. Maximal degree in co-relation 2549. Up to 64 conditions per place. [2023-09-01 09:12:21,657 INFO L119 LiptonReduction]: Number of co-enabled transitions 2704378 [2023-09-01 09:12:50,775 INFO L134 LiptonReduction]: Checked pairs total: 11660863 [2023-09-01 09:12:50,775 INFO L136 LiptonReduction]: Total number of compositions: 1325 [2023-09-01 09:12:50,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:12:50,777 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:12:50,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:12:51,151 INFO L130 PetriNetUnfolder]: 137/978 cut-off events. [2023-09-01 09:12:51,152 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 09:12:51,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:12:51,152 INFO L208 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:12:51,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:12:51,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:12:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1513934118, now seen corresponding path program 1 times [2023-09-01 09:12:51,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:12:51,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106760438] [2023-09-01 09:12:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:12:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:12:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:12:51,194 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:12:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:12:51,255 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:12:51,255 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:12:51,255 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:12:51,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-09-01 09:12:51,256 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:12:51,256 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:12:51,256 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:12:51,256 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-09-01 09:12:51,378 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:12:51,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1659 places, 1755 transitions, 4662 flow [2023-09-01 09:12:52,732 INFO L130 PetriNetUnfolder]: 193/2137 cut-off events. [2023-09-01 09:12:52,733 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 09:12:52,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2762 conditions, 2137 events. 193/2137 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10034 event pairs, 0 based on Foata normal form. 0/1847 useless extension candidates. Maximal degree in co-relation 2649. Up to 66 conditions per place. [2023-09-01 09:12:52,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 1659 places, 1755 transitions, 4662 flow [2023-09-01 09:12:52,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1659 places, 1755 transitions, 4662 flow [2023-09-01 09:12:52,911 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:12:52,911 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1659 places, 1755 transitions, 4662 flow [2023-09-01 09:12:52,911 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1659 places, 1755 transitions, 4662 flow [2023-09-01 09:12:52,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1659 places, 1755 transitions, 4662 flow [2023-09-01 09:12:54,453 INFO L130 PetriNetUnfolder]: 193/2137 cut-off events. [2023-09-01 09:12:54,453 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 09:12:54,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2762 conditions, 2137 events. 193/2137 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10034 event pairs, 0 based on Foata normal form. 0/1847 useless extension candidates. Maximal degree in co-relation 2649. Up to 66 conditions per place. [2023-09-01 09:12:55,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 2883200 [2023-09-01 09:13:25,875 INFO L134 LiptonReduction]: Checked pairs total: 12313339 [2023-09-01 09:13:25,875 INFO L136 LiptonReduction]: Total number of compositions: 1369 [2023-09-01 09:13:25,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:13:25,877 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:13:25,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:13:26,184 INFO L130 PetriNetUnfolder]: 140/1007 cut-off events. [2023-09-01 09:13:26,184 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 09:13:26,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:13:26,185 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:13:26,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:13:26,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:13:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1247655876, now seen corresponding path program 1 times [2023-09-01 09:13:26,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:13:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336319946] [2023-09-01 09:13:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:13:26,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:13:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:13:26,230 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:13:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:13:26,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:13:26,297 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:13:26,297 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:13:26,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-09-01 09:13:26,297 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:13:26,298 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:13:26,298 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:13:26,298 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-09-01 09:13:26,417 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:13:26,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1710 places, 1809 transitions, 4839 flow [2023-09-01 09:13:28,146 INFO L130 PetriNetUnfolder]: 199/2203 cut-off events. [2023-09-01 09:13:28,146 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 09:13:28,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 2203 events. 199/2203 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10355 event pairs, 0 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 2750. Up to 68 conditions per place. [2023-09-01 09:13:28,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 1710 places, 1809 transitions, 4839 flow [2023-09-01 09:13:28,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1710 places, 1809 transitions, 4839 flow [2023-09-01 09:13:28,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:13:28,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1710 places, 1809 transitions, 4839 flow [2023-09-01 09:13:28,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1710 places, 1809 transitions, 4839 flow [2023-09-01 09:13:28,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1710 places, 1809 transitions, 4839 flow [2023-09-01 09:13:29,871 INFO L130 PetriNetUnfolder]: 199/2203 cut-off events. [2023-09-01 09:13:29,872 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 09:13:29,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 2203 events. 199/2203 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10355 event pairs, 0 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 2750. Up to 68 conditions per place. [2023-09-01 09:13:30,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 3067746 [2023-09-01 09:14:02,659 INFO L134 LiptonReduction]: Checked pairs total: 13425529 [2023-09-01 09:14:02,659 INFO L136 LiptonReduction]: Total number of compositions: 1415 [2023-09-01 09:14:02,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:14:02,660 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:14:02,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:14:03,038 INFO L130 PetriNetUnfolder]: 150/1050 cut-off events. [2023-09-01 09:14:03,038 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 09:14:03,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:14:03,039 INFO L208 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:14:03,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:14:03,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:14:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash 49360908, now seen corresponding path program 1 times [2023-09-01 09:14:03,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:14:03,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843312889] [2023-09-01 09:14:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:14:03,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:14:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:14:03,088 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:14:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:14:03,155 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:14:03,155 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:14:03,155 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:14:03,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-09-01 09:14:03,156 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:14:03,156 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:14:03,156 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:14:03,156 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-09-01 09:14:03,278 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:14:03,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1761 places, 1863 transitions, 5018 flow [2023-09-01 09:14:04,800 INFO L130 PetriNetUnfolder]: 205/2269 cut-off events. [2023-09-01 09:14:04,800 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 09:14:04,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2967 conditions, 2269 events. 205/2269 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10671 event pairs, 0 based on Foata normal form. 0/1961 useless extension candidates. Maximal degree in co-relation 2852. Up to 70 conditions per place. [2023-09-01 09:14:04,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 1761 places, 1863 transitions, 5018 flow [2023-09-01 09:14:04,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1761 places, 1863 transitions, 5018 flow [2023-09-01 09:14:04,997 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:14:04,997 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1761 places, 1863 transitions, 5018 flow [2023-09-01 09:14:04,998 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1761 places, 1863 transitions, 5018 flow [2023-09-01 09:14:04,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1761 places, 1863 transitions, 5018 flow [2023-09-01 09:14:06,874 INFO L130 PetriNetUnfolder]: 205/2269 cut-off events. [2023-09-01 09:14:06,875 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 09:14:06,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2967 conditions, 2269 events. 205/2269 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10671 event pairs, 0 based on Foata normal form. 0/1961 useless extension candidates. Maximal degree in co-relation 2852. Up to 70 conditions per place. [2023-09-01 09:14:07,571 INFO L119 LiptonReduction]: Number of co-enabled transitions 3258016 [2023-09-01 09:14:39,945 INFO L134 LiptonReduction]: Checked pairs total: 14239758 [2023-09-01 09:14:39,945 INFO L136 LiptonReduction]: Total number of compositions: 1458 [2023-09-01 09:14:39,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:14:39,946 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:14:39,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:14:40,299 INFO L130 PetriNetUnfolder]: 154/1081 cut-off events. [2023-09-01 09:14:40,299 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 09:14:40,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:14:40,299 INFO L208 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:14:40,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:14:40,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:14:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash 383123699, now seen corresponding path program 1 times [2023-09-01 09:14:40,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:14:40,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719253368] [2023-09-01 09:14:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:14:40,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:14:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:14:40,375 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:14:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:14:40,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:14:40,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:14:40,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:14:40,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-09-01 09:14:40,447 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:14:40,447 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:14:40,447 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:14:40,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-09-01 09:14:40,575 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:14:40,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1812 places, 1917 transitions, 5199 flow [2023-09-01 09:14:42,394 INFO L130 PetriNetUnfolder]: 211/2335 cut-off events. [2023-09-01 09:14:42,394 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 09:14:42,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3071 conditions, 2335 events. 211/2335 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10986 event pairs, 0 based on Foata normal form. 0/2018 useless extension candidates. Maximal degree in co-relation 2955. Up to 72 conditions per place. [2023-09-01 09:14:42,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 1812 places, 1917 transitions, 5199 flow [2023-09-01 09:14:42,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1812 places, 1917 transitions, 5199 flow [2023-09-01 09:14:42,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:14:42,554 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1812 places, 1917 transitions, 5199 flow [2023-09-01 09:14:42,555 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1812 places, 1917 transitions, 5199 flow [2023-09-01 09:14:42,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1812 places, 1917 transitions, 5199 flow [2023-09-01 09:14:44,396 INFO L130 PetriNetUnfolder]: 211/2335 cut-off events. [2023-09-01 09:14:44,397 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 09:14:44,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3071 conditions, 2335 events. 211/2335 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10986 event pairs, 0 based on Foata normal form. 0/2018 useless extension candidates. Maximal degree in co-relation 2955. Up to 72 conditions per place. [2023-09-01 09:14:45,166 INFO L119 LiptonReduction]: Number of co-enabled transitions 3454010 [2023-09-01 09:15:18,548 INFO L134 LiptonReduction]: Checked pairs total: 15045243 [2023-09-01 09:15:18,548 INFO L136 LiptonReduction]: Total number of compositions: 1498 [2023-09-01 09:15:18,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:15:18,550 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:15:18,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:15:18,919 INFO L130 PetriNetUnfolder]: 159/1114 cut-off events. [2023-09-01 09:15:18,919 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 09:15:18,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:15:18,919 INFO L208 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:15:18,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:15:18,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:15:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash 399842463, now seen corresponding path program 1 times [2023-09-01 09:15:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:15:18,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030751387] [2023-09-01 09:15:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:15:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:15:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:18,960 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:15:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:19,038 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:15:19,038 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:15:19,038 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:15:19,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-09-01 09:15:19,039 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:15:19,039 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:15:19,039 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:15:19,039 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-09-01 09:15:19,253 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:15:19,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1863 places, 1971 transitions, 5382 flow [2023-09-01 09:15:21,311 INFO L130 PetriNetUnfolder]: 217/2401 cut-off events. [2023-09-01 09:15:21,312 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 09:15:21,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3176 conditions, 2401 events. 217/2401 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11319 event pairs, 0 based on Foata normal form. 0/2075 useless extension candidates. Maximal degree in co-relation 3059. Up to 74 conditions per place. [2023-09-01 09:15:21,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 1863 places, 1971 transitions, 5382 flow [2023-09-01 09:15:21,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1863 places, 1971 transitions, 5382 flow [2023-09-01 09:15:21,464 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:15:21,464 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1863 places, 1971 transitions, 5382 flow [2023-09-01 09:15:21,464 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1863 places, 1971 transitions, 5382 flow [2023-09-01 09:15:21,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1863 places, 1971 transitions, 5382 flow [2023-09-01 09:15:23,172 INFO L130 PetriNetUnfolder]: 217/2401 cut-off events. [2023-09-01 09:15:23,172 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 09:15:23,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3176 conditions, 2401 events. 217/2401 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11319 event pairs, 0 based on Foata normal form. 0/2075 useless extension candidates. Maximal degree in co-relation 3059. Up to 74 conditions per place. [2023-09-01 09:15:24,334 INFO L119 LiptonReduction]: Number of co-enabled transitions 3655728 [2023-09-01 09:15:58,025 INFO L134 LiptonReduction]: Checked pairs total: 16036296 [2023-09-01 09:15:58,025 INFO L136 LiptonReduction]: Total number of compositions: 1545 [2023-09-01 09:15:58,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:15:58,027 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@150cd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:15:58,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:15:58,535 INFO L130 PetriNetUnfolder]: 163/1145 cut-off events. [2023-09-01 09:15:58,536 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 09:15:58,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:15:58,537 INFO L208 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:15:58,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:15:58,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:15:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1591690686, now seen corresponding path program 1 times [2023-09-01 09:15:58,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:15:58,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865710651] [2023-09-01 09:15:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:15:58,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:15:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:58,592 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:15:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:58,673 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:15:58,674 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:15:58,674 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:15:58,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-09-01 09:15:58,674 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:15:58,674 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:15:58,675 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:15:58,675 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-09-01 09:15:58,855 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:15:58,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1914 places, 2025 transitions, 5567 flow Killed by 15