./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.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/26_stack_cas.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 fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --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 09:15:37,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:15:37,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:15:38,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:15:38,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:15:38,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:15:38,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:15:38,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:15:38,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:15:38,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:15:38,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:15:38,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:15:38,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:15:38,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:15:38,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:15:38,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:15:38,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:15:38,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:15:38,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:15:38,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:15:38,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:15:38,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:15:38,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:15:38,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:15:38,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:15:38,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:15:38,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:15:38,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:15:38,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:15:38,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:15:38,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:15:38,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:15:38,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:15:38,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:15:38,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:15:38,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:15:38,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:15:38,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:15:38,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:15:38,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:15:38,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:15:38,110 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:15:38,144 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:15:38,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:15:38,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:15:38,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:15:38,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:15:38,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:15:38,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:15:38,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:15:38,148 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:15:38,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:15:38,149 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:15:38,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:15:38,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:15:38,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:15:38,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:15:38,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:15:38,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:15:38,151 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:15:38,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:15:38,151 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:15:38,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:15:38,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:15:38,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:15:38,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:15:38,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:15:38,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:15:38,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:15:38,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:15:38,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:15:38,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:15:38,153 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:15:38,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:15:38,154 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:15:38,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:15:38,154 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:15:38,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:15:38,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:15:38,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:15:38,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:15:38,480 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:15:38,480 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:15:38,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-09-01 09:15:39,779 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:15:39,998 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:15:39,998 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-09-01 09:15:40,011 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61328d4fc/c0315926cdd9437d8854dee014736bf8/FLAG2e4764c39 [2023-09-01 09:15:40,023 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61328d4fc/c0315926cdd9437d8854dee014736bf8 [2023-09-01 09:15:40,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:15:40,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:15:40,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:15:40,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:15:40,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:15:40,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20383e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40, skipping insertion in model container [2023-09-01 09:15:40,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:15:40,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:15:40,418 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-09-01 09:15:40,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:15:40,440 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:15:40,492 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-09-01 09:15:40,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:15:40,543 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:15:40,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40 WrapperNode [2023-09-01 09:15:40,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:15:40,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:15:40,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:15:40,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:15:40,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,640 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-09-01 09:15:40,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:15:40,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:15:40,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:15:40,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:15:40,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:15:40,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:15:40,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:15:40,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:15:40,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (1/1) ... [2023-09-01 09:15:40,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:15:40,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:15:40,725 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 09:15:40,744 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 09:15:40,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 09:15:40,760 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 09:15:40,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 09:15:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:15:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:15:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:15:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:15:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:15:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:15:40,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:15:40,763 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 09:15:40,874 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:15:40,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:15:41,171 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:15:41,343 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:15:41,343 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 09:15:41,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:15:41 BoogieIcfgContainer [2023-09-01 09:15:41,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:15:41,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:15:41,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:15:41,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:15:41,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:15:40" (1/3) ... [2023-09-01 09:15:41,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a2db3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:15:41, skipping insertion in model container [2023-09-01 09:15:41,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:15:40" (2/3) ... [2023-09-01 09:15:41,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a2db3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:15:41, skipping insertion in model container [2023-09-01 09:15:41,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:15:41" (3/3) ... [2023-09-01 09:15:41,353 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-09-01 09:15:41,360 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:15:41,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:15:41,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:15:41,369 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:15:41,445 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:15:41,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-09-01 09:15:41,544 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-09-01 09:15:41,545 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:15:41,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-09-01 09:15:41,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-09-01 09:15:41,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-09-01 09:15:41,561 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:15:41,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-09-01 09:15:41,574 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-09-01 09:15:41,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-09-01 09:15:41,600 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-09-01 09:15:41,600 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:15:41,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-09-01 09:15:41,606 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-09-01 09:15:45,334 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-09-01 09:15:45,334 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-09-01 09:15:45,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:15:45,353 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:15:45,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:15:45,357 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-09-01 09:15:45,357 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:15:45,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:15:45,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 09:15:45,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:15:45,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:15:45,362 INFO L85 PathProgramCache]: Analyzing trace with hash 174361225, now seen corresponding path program 1 times [2023-09-01 09:15:45,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:15:45,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849770551] [2023-09-01 09:15:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:15:45,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:15:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:45,468 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:15:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:45,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:15:45,505 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:15:45,507 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:15:45,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:15:45,509 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:15:45,514 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:15:45,515 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:15:45,516 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 09:15:45,580 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:15:45,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-09-01 09:15:45,641 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-09-01 09:15:45,642 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:15:45,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-09-01 09:15:45,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-09-01 09:15:45,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-09-01 09:15:45,649 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:15:45,649 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-09-01 09:15:45,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-09-01 09:15:45,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-09-01 09:15:45,677 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-09-01 09:15:45,677 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:15:45,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-09-01 09:15:45,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-09-01 09:15:50,223 INFO L134 LiptonReduction]: Checked pairs total: 33585 [2023-09-01 09:15:50,223 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-09-01 09:15:50,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:15:50,226 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:15:50,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:15:50,231 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-09-01 09:15:50,231 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:15:50,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:15:50,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 09:15:50,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:15:50,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:15:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1971217253, now seen corresponding path program 1 times [2023-09-01 09:15:50,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:15:50,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091911346] [2023-09-01 09:15:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:15:50,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:15:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:50,263 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:15:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:50,286 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:15:50,287 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:15:50,287 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:15:50,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:15:50,287 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:15:50,288 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:15:50,288 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:15:50,288 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 09:15:50,336 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:15:50,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-09-01 09:15:50,381 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-09-01 09:15:50,381 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:15:50,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-09-01 09:15:50,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 272 transitions, 565 flow [2023-09-01 09:15:50,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 272 transitions, 565 flow [2023-09-01 09:15:50,389 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:15:50,389 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 272 transitions, 565 flow [2023-09-01 09:15:50,390 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 272 transitions, 565 flow [2023-09-01 09:15:50,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-09-01 09:15:50,448 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-09-01 09:15:50,449 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:15:50,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-09-01 09:15:50,464 INFO L119 LiptonReduction]: Number of co-enabled transitions 43056 [2023-09-01 09:15:56,283 INFO L134 LiptonReduction]: Checked pairs total: 78907 [2023-09-01 09:15:56,283 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-09-01 09:15:56,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:15:56,288 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:15:56,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:15:56,319 INFO L130 PetriNetUnfolder]: 7/58 cut-off events. [2023-09-01 09:15:56,327 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:15:56,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:15:56,327 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 09:15:56,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:15:56,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:15:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash -271960691, now seen corresponding path program 1 times [2023-09-01 09:15:56,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:15:56,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154920930] [2023-09-01 09:15:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:15:56,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:15:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:56,406 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:15:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:56,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:15:56,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:15:56,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:15:56,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:15:56,447 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:15:56,447 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:15:56,448 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:15:56,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 09:15:56,509 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:15:56,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-09-01 09:15:56,578 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-09-01 09:15:56,579 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:15:56,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-09-01 09:15:56,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 351 transitions, 734 flow [2023-09-01 09:15:56,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 351 transitions, 734 flow [2023-09-01 09:15:56,588 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:15:56,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 351 transitions, 734 flow [2023-09-01 09:15:56,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 351 transitions, 734 flow [2023-09-01 09:15:56,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-09-01 09:15:56,663 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-09-01 09:15:56,663 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:15:56,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-09-01 09:15:56,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 82056 [2023-09-01 09:16:03,872 INFO L134 LiptonReduction]: Checked pairs total: 163123 [2023-09-01 09:16:03,873 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-09-01 09:16:03,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:03,875 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:03,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:03,898 INFO L130 PetriNetUnfolder]: 14/94 cut-off events. [2023-09-01 09:16:03,904 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:16:03,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:03,905 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 09:16:03,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:03,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1535314522, now seen corresponding path program 1 times [2023-09-01 09:16:03,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:03,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498046569] [2023-09-01 09:16:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:03,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:03,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:03,986 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:03,988 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:03,989 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:03,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:16:03,989 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:03,990 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:03,990 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:03,990 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 09:16:04,062 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:04,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:04,163 INFO L130 PetriNetUnfolder]: 51/488 cut-off events. [2023-09-01 09:16:04,163 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:16:04,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 488 events. 51/488 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1751 event pairs, 0 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 410. Up to 12 conditions per place. [2023-09-01 09:16:04,172 INFO L82 GeneralOperation]: Start removeDead. Operand has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:04,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:04,178 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:04,178 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:04,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:04,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 430 transitions, 905 flow [2023-09-01 09:16:04,285 INFO L130 PetriNetUnfolder]: 51/488 cut-off events. [2023-09-01 09:16:04,286 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:16:04,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 488 events. 51/488 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1751 event pairs, 0 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 410. Up to 12 conditions per place. [2023-09-01 09:16:04,322 INFO L119 LiptonReduction]: Number of co-enabled transitions 133380 [2023-09-01 09:16:12,851 INFO L134 LiptonReduction]: Checked pairs total: 266074 [2023-09-01 09:16:12,851 INFO L136 LiptonReduction]: Total number of compositions: 342 [2023-09-01 09:16:12,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:12,853 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:12,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:12,870 INFO L130 PetriNetUnfolder]: 22/128 cut-off events. [2023-09-01 09:16:12,870 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:16:12,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:12,871 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:16:12,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:12,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:12,871 INFO L85 PathProgramCache]: Analyzing trace with hash -821437459, now seen corresponding path program 1 times [2023-09-01 09:16:12,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:12,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399018572] [2023-09-01 09:16:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:12,894 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:12,913 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:12,913 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:12,913 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:12,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:16:12,914 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:12,914 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:12,915 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:12,915 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 09:16:13,010 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:13,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:13,173 INFO L130 PetriNetUnfolder]: 61/579 cut-off events. [2023-09-01 09:16:13,173 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:16:13,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 579 events. 61/579 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2262 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 507. Up to 14 conditions per place. [2023-09-01 09:16:13,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:13,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:13,197 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:13,197 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:13,197 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:13,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 509 transitions, 1078 flow [2023-09-01 09:16:13,358 INFO L130 PetriNetUnfolder]: 61/579 cut-off events. [2023-09-01 09:16:13,359 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:16:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 579 events. 61/579 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2262 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 507. Up to 14 conditions per place. [2023-09-01 09:16:13,418 INFO L119 LiptonReduction]: Number of co-enabled transitions 197028 [2023-09-01 09:16:23,483 INFO L134 LiptonReduction]: Checked pairs total: 408501 [2023-09-01 09:16:23,483 INFO L136 LiptonReduction]: Total number of compositions: 409 [2023-09-01 09:16:23,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:23,485 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:23,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:23,514 INFO L130 PetriNetUnfolder]: 28/161 cut-off events. [2023-09-01 09:16:23,515 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:16:23,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:23,515 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:16:23,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:23,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash 657747243, now seen corresponding path program 1 times [2023-09-01 09:16:23,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:23,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337026464] [2023-09-01 09:16:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:23,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:23,561 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:23,594 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:23,594 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:23,595 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:23,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:16:23,595 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:23,597 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:23,597 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:23,597 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 09:16:23,683 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:23,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:23,851 INFO L130 PetriNetUnfolder]: 71/670 cut-off events. [2023-09-01 09:16:23,851 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:16:23,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 670 events. 71/670 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2752 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 605. Up to 16 conditions per place. [2023-09-01 09:16:23,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:23,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:23,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:23,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:23,878 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:23,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 539 places, 588 transitions, 1253 flow [2023-09-01 09:16:24,066 INFO L130 PetriNetUnfolder]: 71/670 cut-off events. [2023-09-01 09:16:24,066 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:16:24,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 670 events. 71/670 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2752 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 605. Up to 16 conditions per place. [2023-09-01 09:16:24,145 INFO L119 LiptonReduction]: Number of co-enabled transitions 273000 [2023-09-01 09:16:35,874 INFO L134 LiptonReduction]: Checked pairs total: 601155 [2023-09-01 09:16:35,874 INFO L136 LiptonReduction]: Total number of compositions: 471 [2023-09-01 09:16:35,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:35,876 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:35,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:35,899 INFO L130 PetriNetUnfolder]: 36/196 cut-off events. [2023-09-01 09:16:35,899 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:16:35,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:35,899 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:16:35,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:35,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash 31876957, now seen corresponding path program 1 times [2023-09-01 09:16:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:35,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774773478] [2023-09-01 09:16:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:35,931 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:35,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:35,958 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:35,958 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:35,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:16:35,959 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:35,959 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:35,959 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:35,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 09:16:36,083 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:36,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:36,295 INFO L130 PetriNetUnfolder]: 81/761 cut-off events. [2023-09-01 09:16:36,295 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:16:36,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 761 events. 81/761 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3271 event pairs, 0 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 704. Up to 18 conditions per place. [2023-09-01 09:16:36,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:36,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:36,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:36,333 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:36,333 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:36,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 611 places, 667 transitions, 1430 flow [2023-09-01 09:16:36,569 INFO L130 PetriNetUnfolder]: 81/761 cut-off events. [2023-09-01 09:16:36,569 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:16:36,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 761 events. 81/761 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3271 event pairs, 0 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 704. Up to 18 conditions per place. [2023-09-01 09:16:36,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 361296 [2023-09-01 09:16:49,389 INFO L134 LiptonReduction]: Checked pairs total: 812240 [2023-09-01 09:16:49,389 INFO L136 LiptonReduction]: Total number of compositions: 534 [2023-09-01 09:16:49,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:49,396 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:49,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:49,423 INFO L130 PetriNetUnfolder]: 43/232 cut-off events. [2023-09-01 09:16:49,424 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:16:49,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:49,424 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:16:49,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:49,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:49,425 INFO L85 PathProgramCache]: Analyzing trace with hash -277617304, now seen corresponding path program 1 times [2023-09-01 09:16:49,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:49,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213336845] [2023-09-01 09:16:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:49,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:49,459 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:49,488 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:49,489 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:49,489 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:49,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:16:49,489 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:49,491 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:49,491 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:49,491 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 09:16:49,608 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:49,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 683 places, 746 transitions, 1609 flow [2023-09-01 09:16:49,880 INFO L130 PetriNetUnfolder]: 91/852 cut-off events. [2023-09-01 09:16:49,880 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:16:49,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 852 events. 91/852 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3787 event pairs, 0 based on Foata normal form. 0/742 useless extension candidates. Maximal degree in co-relation 804. Up to 20 conditions per place. [2023-09-01 09:16:49,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 683 places, 746 transitions, 1609 flow [2023-09-01 09:16:49,917 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 683 places, 746 transitions, 1609 flow [2023-09-01 09:16:49,917 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:49,917 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 683 places, 746 transitions, 1609 flow [2023-09-01 09:16:49,918 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 683 places, 746 transitions, 1609 flow [2023-09-01 09:16:49,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 683 places, 746 transitions, 1609 flow [2023-09-01 09:16:50,220 INFO L130 PetriNetUnfolder]: 91/852 cut-off events. [2023-09-01 09:16:50,221 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:16:50,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 852 events. 91/852 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3787 event pairs, 0 based on Foata normal form. 0/742 useless extension candidates. Maximal degree in co-relation 804. Up to 20 conditions per place. [2023-09-01 09:16:50,290 INFO L119 LiptonReduction]: Number of co-enabled transitions 461916 [2023-09-01 09:17:05,065 INFO L134 LiptonReduction]: Checked pairs total: 929047 [2023-09-01 09:17:05,065 INFO L136 LiptonReduction]: Total number of compositions: 598 [2023-09-01 09:17:05,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:05,067 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:05,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:05,095 INFO L130 PetriNetUnfolder]: 50/266 cut-off events. [2023-09-01 09:17:05,095 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:17:05,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:05,096 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:17:05,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:05,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:05,096 INFO L85 PathProgramCache]: Analyzing trace with hash -392173397, now seen corresponding path program 1 times [2023-09-01 09:17:05,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:05,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923666646] [2023-09-01 09:17:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:05,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:05,118 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:05,139 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:05,139 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:05,139 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:05,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:17:05,139 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:05,140 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:05,140 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:05,140 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 09:17:05,251 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:05,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:05,529 INFO L130 PetriNetUnfolder]: 101/943 cut-off events. [2023-09-01 09:17:05,530 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:17:05,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 943 events. 101/943 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4319 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 905. Up to 22 conditions per place. [2023-09-01 09:17:05,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:05,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:05,564 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:05,564 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:05,564 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:05,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 755 places, 825 transitions, 1790 flow [2023-09-01 09:17:05,861 INFO L130 PetriNetUnfolder]: 101/943 cut-off events. [2023-09-01 09:17:05,862 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:17:05,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 943 events. 101/943 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4319 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 905. Up to 22 conditions per place. [2023-09-01 09:17:06,068 INFO L119 LiptonReduction]: Number of co-enabled transitions 574860 [2023-09-01 09:17:22,114 INFO L134 LiptonReduction]: Checked pairs total: 1167442 [2023-09-01 09:17:22,114 INFO L136 LiptonReduction]: Total number of compositions: 663 [2023-09-01 09:17:22,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:22,116 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:22,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:22,158 INFO L130 PetriNetUnfolder]: 57/300 cut-off events. [2023-09-01 09:17:22,158 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:17:22,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:22,158 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:17:22,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:22,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1279378807, now seen corresponding path program 1 times [2023-09-01 09:17:22,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:22,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482606785] [2023-09-01 09:17:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:22,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:22,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:22,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:22,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:22,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:22,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:17:22,235 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:22,236 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:22,236 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:22,236 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 09:17:22,355 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:22,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:22,727 INFO L130 PetriNetUnfolder]: 111/1034 cut-off events. [2023-09-01 09:17:22,727 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:17:22,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 1034 events. 111/1034 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4832 event pairs, 0 based on Foata normal form. 0/900 useless extension candidates. Maximal degree in co-relation 1009. Up to 24 conditions per place. [2023-09-01 09:17:22,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:22,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:22,778 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:22,778 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:22,778 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:22,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 827 places, 904 transitions, 1973 flow [2023-09-01 09:17:23,126 INFO L130 PetriNetUnfolder]: 111/1034 cut-off events. [2023-09-01 09:17:23,126 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:17:23,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 1034 events. 111/1034 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4832 event pairs, 0 based on Foata normal form. 0/900 useless extension candidates. Maximal degree in co-relation 1009. Up to 24 conditions per place. [2023-09-01 09:17:23,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 700128 [2023-09-01 09:17:40,829 INFO L134 LiptonReduction]: Checked pairs total: 1457710 [2023-09-01 09:17:40,830 INFO L136 LiptonReduction]: Total number of compositions: 726 [2023-09-01 09:17:40,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:40,831 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:40,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:40,911 INFO L130 PetriNetUnfolder]: 64/332 cut-off events. [2023-09-01 09:17:40,911 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:17:40,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:40,911 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:17:40,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:40,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:40,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2091456884, now seen corresponding path program 1 times [2023-09-01 09:17:40,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:40,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624062330] [2023-09-01 09:17:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:40,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:40,956 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:40,997 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:40,997 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:40,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:40,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 09:17:40,998 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:40,999 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:40,999 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:40,999 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 09:17:41,149 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:41,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 899 places, 983 transitions, 2158 flow [2023-09-01 09:17:41,596 INFO L130 PetriNetUnfolder]: 121/1125 cut-off events. [2023-09-01 09:17:41,596 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:17:41,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 1125 events. 121/1125 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5341 event pairs, 0 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 1114. Up to 26 conditions per place. [2023-09-01 09:17:41,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 899 places, 983 transitions, 2158 flow [2023-09-01 09:17:41,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 899 places, 983 transitions, 2158 flow [2023-09-01 09:17:41,653 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:41,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 899 places, 983 transitions, 2158 flow [2023-09-01 09:17:41,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 899 places, 983 transitions, 2158 flow [2023-09-01 09:17:41,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 899 places, 983 transitions, 2158 flow [2023-09-01 09:17:42,053 INFO L130 PetriNetUnfolder]: 121/1125 cut-off events. [2023-09-01 09:17:42,053 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:17:42,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 1125 events. 121/1125 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5341 event pairs, 0 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 1114. Up to 26 conditions per place. [2023-09-01 09:17:42,196 INFO L119 LiptonReduction]: Number of co-enabled transitions 837720 [2023-09-01 09:18:01,851 INFO L134 LiptonReduction]: Checked pairs total: 1744929 [2023-09-01 09:18:01,852 INFO L136 LiptonReduction]: Total number of compositions: 788 [2023-09-01 09:18:01,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:01,853 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:01,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:01,899 INFO L130 PetriNetUnfolder]: 70/366 cut-off events. [2023-09-01 09:18:01,899 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:18:01,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:01,900 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 09:18:01,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:01,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:01,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1844041229, now seen corresponding path program 1 times [2023-09-01 09:18:01,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:01,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825790891] [2023-09-01 09:18:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:01,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:01,930 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:01,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:01,956 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:01,957 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:01,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 09:18:01,957 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:01,957 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:01,958 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:01,958 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 09:18:02,100 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:02,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:02,542 INFO L130 PetriNetUnfolder]: 131/1216 cut-off events. [2023-09-01 09:18:02,542 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:18:02,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 1216 events. 131/1216 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5848 event pairs, 0 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 1220. Up to 28 conditions per place. [2023-09-01 09:18:02,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:02,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:02,606 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:02,606 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:02,606 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:02,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:18:03,073 INFO L130 PetriNetUnfolder]: 131/1216 cut-off events. [2023-09-01 09:18:03,073 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:18:03,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 1216 events. 131/1216 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5848 event pairs, 0 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 1220. Up to 28 conditions per place. [2023-09-01 09:18:03,296 INFO L119 LiptonReduction]: Number of co-enabled transitions 987636 [2023-09-01 09:18:24,531 INFO L134 LiptonReduction]: Checked pairs total: 2255991 [2023-09-01 09:18:24,532 INFO L136 LiptonReduction]: Total number of compositions: 848 [2023-09-01 09:18:24,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:24,534 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:24,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:24,585 INFO L130 PetriNetUnfolder]: 78/404 cut-off events. [2023-09-01 09:18:24,585 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:18:24,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:24,585 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 09:18:24,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:24,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash -268375454, now seen corresponding path program 1 times [2023-09-01 09:18:24,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:24,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137858919] [2023-09-01 09:18:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:24,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:24,611 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:24,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:24,639 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:24,640 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:24,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 09:18:24,640 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:24,641 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:24,641 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:24,641 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 09:18:24,786 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:24,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:25,248 INFO L130 PetriNetUnfolder]: 141/1307 cut-off events. [2023-09-01 09:18:25,248 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:18:25,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 1307 events. 141/1307 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6367 event pairs, 0 based on Foata normal form. 0/1137 useless extension candidates. Maximal degree in co-relation 1327. Up to 30 conditions per place. [2023-09-01 09:18:25,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:25,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:25,325 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:25,325 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:25,325 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:25,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:18:25,804 INFO L130 PetriNetUnfolder]: 141/1307 cut-off events. [2023-09-01 09:18:25,804 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:18:25,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 1307 events. 141/1307 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6367 event pairs, 0 based on Foata normal form. 0/1137 useless extension candidates. Maximal degree in co-relation 1327. Up to 30 conditions per place. [2023-09-01 09:18:26,041 INFO L119 LiptonReduction]: Number of co-enabled transitions 1149876 [2023-09-01 09:18:48,917 INFO L134 LiptonReduction]: Checked pairs total: 2617201 [2023-09-01 09:18:48,917 INFO L136 LiptonReduction]: Total number of compositions: 914 [2023-09-01 09:18:48,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:48,918 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:48,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:48,978 INFO L130 PetriNetUnfolder]: 84/437 cut-off events. [2023-09-01 09:18:48,979 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:18:48,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:48,979 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 09:18:48,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:48,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:48,979 INFO L85 PathProgramCache]: Analyzing trace with hash 72312746, now seen corresponding path program 1 times [2023-09-01 09:18:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:48,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615391905] [2023-09-01 09:18:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:48,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:49,008 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:49,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:49,040 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:49,040 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:49,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 09:18:49,041 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:49,041 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:49,041 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:49,041 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 09:18:49,214 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:49,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:18:49,736 INFO L130 PetriNetUnfolder]: 151/1398 cut-off events. [2023-09-01 09:18:49,736 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:18:49,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1398 events. 151/1398 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6913 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1435. Up to 32 conditions per place. [2023-09-01 09:18:49,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:18:49,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:18:49,822 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:49,822 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:18:49,822 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:18:49,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:18:50,332 INFO L130 PetriNetUnfolder]: 151/1398 cut-off events. [2023-09-01 09:18:50,332 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:18:50,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1398 events. 151/1398 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6913 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1435. Up to 32 conditions per place. [2023-09-01 09:18:50,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 1324440 [2023-09-01 09:19:15,281 INFO L134 LiptonReduction]: Checked pairs total: 2975786 [2023-09-01 09:19:15,281 INFO L136 LiptonReduction]: Total number of compositions: 974 [2023-09-01 09:19:15,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:19:15,283 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:19:15,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:19:15,347 INFO L130 PetriNetUnfolder]: 91/468 cut-off events. [2023-09-01 09:19:15,347 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:19:15,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:19:15,347 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 09:19:15,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:19:15,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:19:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash 459114490, now seen corresponding path program 1 times [2023-09-01 09:19:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:19:15,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534195360] [2023-09-01 09:19:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:19:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:19:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:15,385 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:19:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:15,416 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:19:15,416 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:19:15,416 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:19:15,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 09:19:15,416 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:19:15,417 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:19:15,417 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:19:15,417 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 09:19:15,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:19:15,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:16,227 INFO L130 PetriNetUnfolder]: 161/1489 cut-off events. [2023-09-01 09:19:16,227 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:19:16,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 1489 events. 161/1489 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7400 event pairs, 0 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 1544. Up to 34 conditions per place. [2023-09-01 09:19:16,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:16,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:16,302 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:19:16,302 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:16,302 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:16,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:19:16,850 INFO L130 PetriNetUnfolder]: 161/1489 cut-off events. [2023-09-01 09:19:16,850 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:19:16,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 1489 events. 161/1489 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7400 event pairs, 0 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 1544. Up to 34 conditions per place. [2023-09-01 09:19:17,271 INFO L119 LiptonReduction]: Number of co-enabled transitions 1511328 [2023-09-01 09:19:43,450 INFO L134 LiptonReduction]: Checked pairs total: 3418394 [2023-09-01 09:19:43,450 INFO L136 LiptonReduction]: Total number of compositions: 1043 [2023-09-01 09:19:43,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:19:43,452 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:19:43,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:19:43,526 INFO L130 PetriNetUnfolder]: 98/504 cut-off events. [2023-09-01 09:19:43,527 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:19:43,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:19:43,527 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 09:19:43,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:19:43,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:19:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1151175113, now seen corresponding path program 1 times [2023-09-01 09:19:43,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:19:43,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348854478] [2023-09-01 09:19:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:19:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:19:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:43,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:19:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:43,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:19:43,624 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:19:43,624 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:19:43,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 09:19:43,624 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:19:43,624 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:19:43,625 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:19:43,625 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 09:19:43,812 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:19:43,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:19:44,455 INFO L130 PetriNetUnfolder]: 171/1580 cut-off events. [2023-09-01 09:19:44,455 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:19:44,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 1580 events. 171/1580 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7910 event pairs, 0 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 1654. Up to 36 conditions per place. [2023-09-01 09:19:44,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:19:44,549 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:19:44,549 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:19:44,549 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:19:44,549 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:19:44,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:19:45,218 INFO L130 PetriNetUnfolder]: 171/1580 cut-off events. [2023-09-01 09:19:45,218 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:19:45,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 1580 events. 171/1580 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7910 event pairs, 0 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 1654. Up to 36 conditions per place. [2023-09-01 09:19:45,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 1710540 [2023-09-01 09:20:13,664 INFO L134 LiptonReduction]: Checked pairs total: 3860000 [2023-09-01 09:20:13,665 INFO L136 LiptonReduction]: Total number of compositions: 1094 [2023-09-01 09:20:13,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:20:13,667 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:20:13,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:20:13,817 INFO L130 PetriNetUnfolder]: 106/539 cut-off events. [2023-09-01 09:20:13,817 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:20:13,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:20:13,818 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 09:20:13,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:20:13,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:20:13,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2044922245, now seen corresponding path program 1 times [2023-09-01 09:20:13,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:20:13,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388682463] [2023-09-01 09:20:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:20:13,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:20:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:13,861 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:20:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:13,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:20:13,898 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:20:13,898 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:20:13,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 09:20:13,899 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:20:13,899 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:20:13,899 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:20:13,899 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 09:20:14,096 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:20:14,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:14,806 INFO L130 PetriNetUnfolder]: 181/1671 cut-off events. [2023-09-01 09:20:14,806 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:20:14,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 1671 events. 181/1671 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8434 event pairs, 0 based on Foata normal form. 0/1453 useless extension candidates. Maximal degree in co-relation 1765. Up to 38 conditions per place. [2023-09-01 09:20:14,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:14,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:14,937 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:20:14,937 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:14,937 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:14,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:20:15,636 INFO L130 PetriNetUnfolder]: 181/1671 cut-off events. [2023-09-01 09:20:15,637 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:20:15,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 1671 events. 181/1671 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8434 event pairs, 0 based on Foata normal form. 0/1453 useless extension candidates. Maximal degree in co-relation 1765. Up to 38 conditions per place. [2023-09-01 09:20:16,035 INFO L119 LiptonReduction]: Number of co-enabled transitions 1922076 [2023-09-01 09:20:46,156 INFO L134 LiptonReduction]: Checked pairs total: 4368552 [2023-09-01 09:20:46,156 INFO L136 LiptonReduction]: Total number of compositions: 1165 [2023-09-01 09:20:46,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:20:46,158 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:20:46,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:20:46,257 INFO L130 PetriNetUnfolder]: 113/573 cut-off events. [2023-09-01 09:20:46,257 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:20:46,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:20:46,257 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 09:20:46,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:20:46,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:20:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash -28340825, now seen corresponding path program 1 times [2023-09-01 09:20:46,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:20:46,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978224678] [2023-09-01 09:20:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:20:46,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:20:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:46,306 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:20:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:46,441 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:20:46,443 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:20:46,443 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:20:46,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 09:20:46,444 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:20:46,444 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:20:46,444 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:20:46,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 09:20:46,706 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:20:46,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:20:47,617 INFO L130 PetriNetUnfolder]: 191/1762 cut-off events. [2023-09-01 09:20:47,617 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:20:47,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 1762 events. 191/1762 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8943 event pairs, 0 based on Foata normal form. 0/1532 useless extension candidates. Maximal degree in co-relation 1877. Up to 40 conditions per place. [2023-09-01 09:20:47,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:20:47,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:20:47,764 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:20:47,765 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:20:47,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:20:47,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:20:48,687 INFO L130 PetriNetUnfolder]: 191/1762 cut-off events. [2023-09-01 09:20:48,687 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:20:48,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 1762 events. 191/1762 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8943 event pairs, 0 based on Foata normal form. 0/1532 useless extension candidates. Maximal degree in co-relation 1877. Up to 40 conditions per place. [2023-09-01 09:20:49,022 INFO L119 LiptonReduction]: Number of co-enabled transitions 2145936 [2023-09-01 09:21:20,637 INFO L134 LiptonReduction]: Checked pairs total: 4909396 [2023-09-01 09:21:20,637 INFO L136 LiptonReduction]: Total number of compositions: 1227 [2023-09-01 09:21:20,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:21:20,639 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:21:20,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:21:20,749 INFO L130 PetriNetUnfolder]: 120/608 cut-off events. [2023-09-01 09:21:20,749 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:21:20,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:21:20,749 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 09:21:20,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:21:20,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:21:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1576653855, now seen corresponding path program 1 times [2023-09-01 09:21:20,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:21:20,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342998645] [2023-09-01 09:21:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:21:20,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:21:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:20,788 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:21:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:20,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:21:20,827 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:21:20,827 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:21:20,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 09:21:20,828 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:21:20,828 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:21:20,828 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:21:20,828 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 09:21:21,020 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:21:21,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:22,041 INFO L130 PetriNetUnfolder]: 201/1853 cut-off events. [2023-09-01 09:21:22,042 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:21:22,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 1853 events. 201/1853 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9439 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 1990. Up to 42 conditions per place. [2023-09-01 09:21:22,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:22,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:22,144 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:21:22,144 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:22,144 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:22,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:21:23,018 INFO L130 PetriNetUnfolder]: 201/1853 cut-off events. [2023-09-01 09:21:23,018 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:21:23,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 1853 events. 201/1853 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9439 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 1990. Up to 42 conditions per place. [2023-09-01 09:21:23,598 INFO L119 LiptonReduction]: Number of co-enabled transitions 2382120 [2023-09-01 09:21:56,930 INFO L134 LiptonReduction]: Checked pairs total: 5438150 [2023-09-01 09:21:56,930 INFO L136 LiptonReduction]: Total number of compositions: 1292 [2023-09-01 09:21:56,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:21:56,932 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:21:56,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:21:57,054 INFO L130 PetriNetUnfolder]: 126/641 cut-off events. [2023-09-01 09:21:57,054 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:21:57,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:21:57,054 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 09:21:57,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:21:57,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:21:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1517417906, now seen corresponding path program 1 times [2023-09-01 09:21:57,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:21:57,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253440389] [2023-09-01 09:21:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:21:57,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:21:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:57,094 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:21:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:57,137 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:21:57,137 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:21:57,137 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:21:57,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 09:21:57,138 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:21:57,138 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:21:57,138 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:21:57,139 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 09:21:57,357 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:21:57,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:21:58,574 INFO L130 PetriNetUnfolder]: 211/1944 cut-off events. [2023-09-01 09:21:58,574 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:21:58,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 1944 events. 211/1944 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9979 event pairs, 0 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 2104. Up to 44 conditions per place. [2023-09-01 09:21:58,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:21:58,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:21:58,711 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:21:58,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:21:58,711 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:21:58,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:21:59,890 INFO L130 PetriNetUnfolder]: 211/1944 cut-off events. [2023-09-01 09:21:59,891 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:21:59,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 1944 events. 211/1944 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9979 event pairs, 0 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 2104. Up to 44 conditions per place. [2023-09-01 09:22:00,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 2630628 [2023-09-01 09:22:36,255 INFO L134 LiptonReduction]: Checked pairs total: 6023620 [2023-09-01 09:22:36,255 INFO L136 LiptonReduction]: Total number of compositions: 1352 [2023-09-01 09:22:36,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:22:36,257 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:22:36,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:22:36,391 INFO L130 PetriNetUnfolder]: 133/677 cut-off events. [2023-09-01 09:22:36,391 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:22:36,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:22:36,391 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 09:22:36,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:22:36,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:22:36,391 INFO L85 PathProgramCache]: Analyzing trace with hash 487342399, now seen corresponding path program 1 times [2023-09-01 09:22:36,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:22:36,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494021868] [2023-09-01 09:22:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:22:36,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:22:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:22:36,433 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:22:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:22:36,477 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:22:36,477 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:22:36,477 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:22:36,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 09:22:36,477 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:22:36,478 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:22:36,478 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:22:36,478 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 09:22:36,692 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:22:36,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:22:38,004 INFO L130 PetriNetUnfolder]: 221/2035 cut-off events. [2023-09-01 09:22:38,004 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:22:38,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 2035 events. 221/2035 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10464 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2219. Up to 46 conditions per place. [2023-09-01 09:22:38,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:22:38,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:22:38,137 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:22:38,137 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:22:38,137 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:22:38,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:22:39,390 INFO L130 PetriNetUnfolder]: 221/2035 cut-off events. [2023-09-01 09:22:39,390 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:22:39,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 2035 events. 221/2035 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10464 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2219. Up to 46 conditions per place. [2023-09-01 09:22:40,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 2891460 [2023-09-01 09:23:18,203 INFO L134 LiptonReduction]: Checked pairs total: 5961511 [2023-09-01 09:23:18,204 INFO L136 LiptonReduction]: Total number of compositions: 1418 [2023-09-01 09:23:18,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:23:18,205 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:23:18,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:23:18,357 INFO L130 PetriNetUnfolder]: 141/711 cut-off events. [2023-09-01 09:23:18,357 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:23:18,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:23:18,358 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 09:23:18,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:23:18,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:23:18,358 INFO L85 PathProgramCache]: Analyzing trace with hash -232205019, now seen corresponding path program 1 times [2023-09-01 09:23:18,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:23:18,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286949572] [2023-09-01 09:23:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:23:18,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:23:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:18,427 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:23:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:18,481 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:23:18,481 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:23:18,481 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:23:18,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 09:23:18,481 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:23:18,482 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:23:18,482 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:23:18,482 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 09:23:18,696 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:23:18,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:20,120 INFO L130 PetriNetUnfolder]: 231/2126 cut-off events. [2023-09-01 09:23:20,120 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:23:20,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2126 events. 231/2126 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10988 event pairs, 0 based on Foata normal form. 0/1848 useless extension candidates. Maximal degree in co-relation 2335. Up to 48 conditions per place. [2023-09-01 09:23:20,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:20,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:20,254 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:23:20,254 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:20,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:20,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:23:21,672 INFO L130 PetriNetUnfolder]: 231/2126 cut-off events. [2023-09-01 09:23:21,672 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:23:21,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2126 events. 231/2126 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10988 event pairs, 0 based on Foata normal form. 0/1848 useless extension candidates. Maximal degree in co-relation 2335. Up to 48 conditions per place. [2023-09-01 09:23:22,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 3164616 [2023-09-01 09:24:01,899 INFO L134 LiptonReduction]: Checked pairs total: 6441936 [2023-09-01 09:24:01,900 INFO L136 LiptonReduction]: Total number of compositions: 1478 [2023-09-01 09:24:01,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:24:01,901 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:24:01,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:24:02,055 INFO L130 PetriNetUnfolder]: 147/741 cut-off events. [2023-09-01 09:24:02,055 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:24:02,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:24:02,055 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 09:24:02,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:24:02,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:24:02,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1237637143, now seen corresponding path program 1 times [2023-09-01 09:24:02,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:24:02,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895568683] [2023-09-01 09:24:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:24:02,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:24:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:24:02,104 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:24:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:24:02,154 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:24:02,155 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:24:02,155 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:24:02,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 09:24:02,155 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:24:02,156 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:24:02,156 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:24:02,156 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 09:24:02,377 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:24:02,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:03,898 INFO L130 PetriNetUnfolder]: 241/2217 cut-off events. [2023-09-01 09:24:03,899 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:24:04,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 2217 events. 241/2217 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11496 event pairs, 0 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 2452. Up to 50 conditions per place. [2023-09-01 09:24:04,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:04,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:04,046 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:24:04,046 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:04,046 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:04,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:24:06,122 INFO L130 PetriNetUnfolder]: 241/2217 cut-off events. [2023-09-01 09:24:06,123 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:24:06,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 2217 events. 241/2217 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11496 event pairs, 0 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 2452. Up to 50 conditions per place. [2023-09-01 09:24:07,089 INFO L119 LiptonReduction]: Number of co-enabled transitions 3450096 [2023-09-01 09:24:48,043 INFO L134 LiptonReduction]: Checked pairs total: 7116348 [2023-09-01 09:24:48,043 INFO L136 LiptonReduction]: Total number of compositions: 1545 [2023-09-01 09:24:48,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:24:48,045 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:24:48,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:24:48,214 INFO L130 PetriNetUnfolder]: 155/777 cut-off events. [2023-09-01 09:24:48,215 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:24:48,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:24:48,215 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 09:24:48,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:24:48,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:24:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1713990933, now seen corresponding path program 1 times [2023-09-01 09:24:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:24:48,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293631580] [2023-09-01 09:24:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:24:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:24:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:24:48,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:24:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:24:48,328 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:24:48,328 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:24:48,329 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:24:48,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 09:24:48,329 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:24:48,329 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:24:48,329 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:24:48,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 09:24:48,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:24:48,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:24:50,346 INFO L130 PetriNetUnfolder]: 251/2308 cut-off events. [2023-09-01 09:24:50,346 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:24:50,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 2308 events. 251/2308 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11993 event pairs, 0 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 2570. Up to 52 conditions per place. [2023-09-01 09:24:50,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:24:50,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:24:50,513 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:24:50,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:24:50,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:24:50,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:24:52,259 INFO L130 PetriNetUnfolder]: 251/2308 cut-off events. [2023-09-01 09:24:52,259 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:24:52,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 2308 events. 251/2308 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11993 event pairs, 0 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 2570. Up to 52 conditions per place. [2023-09-01 09:24:53,154 INFO L119 LiptonReduction]: Number of co-enabled transitions 3747900 [2023-09-01 09:25:36,931 INFO L134 LiptonReduction]: Checked pairs total: 7669208 [2023-09-01 09:25:36,931 INFO L136 LiptonReduction]: Total number of compositions: 1604 [2023-09-01 09:25:36,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:25:36,933 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:25:36,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:25:37,125 INFO L130 PetriNetUnfolder]: 161/811 cut-off events. [2023-09-01 09:25:37,125 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:25:37,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:25:37,126 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 09:25:37,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:25:37,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:25:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash 782955840, now seen corresponding path program 1 times [2023-09-01 09:25:37,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:25:37,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793065681] [2023-09-01 09:25:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:25:37,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:25:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:25:37,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:25:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:25:37,267 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:25:37,268 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:25:37,268 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:25:37,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 09:25:37,268 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:25:37,269 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:25:37,269 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:25:37,269 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 09:25:37,562 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:25:37,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:25:39,534 INFO L130 PetriNetUnfolder]: 261/2399 cut-off events. [2023-09-01 09:25:39,534 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:25:39,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2829 conditions, 2399 events. 261/2399 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12492 event pairs, 0 based on Foata normal form. 0/2085 useless extension candidates. Maximal degree in co-relation 2689. Up to 54 conditions per place. [2023-09-01 09:25:39,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:25:39,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:25:39,702 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:25:39,703 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:25:39,703 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:25:39,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:25:41,588 INFO L130 PetriNetUnfolder]: 261/2399 cut-off events. [2023-09-01 09:25:41,588 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:25:41,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2829 conditions, 2399 events. 261/2399 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12492 event pairs, 0 based on Foata normal form. 0/2085 useless extension candidates. Maximal degree in co-relation 2689. Up to 54 conditions per place. [2023-09-01 09:25:42,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 4058028 [2023-09-01 09:26:28,712 INFO L134 LiptonReduction]: Checked pairs total: 9032144 [2023-09-01 09:26:28,712 INFO L136 LiptonReduction]: Total number of compositions: 1674 [2023-09-01 09:26:28,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:26:28,715 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;@3fe817e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:26:28,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:26:28,918 INFO L130 PetriNetUnfolder]: 168/844 cut-off events. [2023-09-01 09:26:28,919 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:26:28,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:26:28,919 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 09:26:28,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:26:28,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:26:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash -376605358, now seen corresponding path program 1 times [2023-09-01 09:26:28,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:26:28,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135302265] [2023-09-01 09:26:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:26:28,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:26:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:26:28,988 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:26:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:26:29,049 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:26:29,049 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:26:29,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:26:29,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 09:26:29,049 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:26:29,050 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:26:29,050 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:26:29,050 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-09-01 09:26:29,351 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:26:29,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:31,338 INFO L130 PetriNetUnfolder]: 271/2490 cut-off events. [2023-09-01 09:26:31,338 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:26:31,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 2490 events. 271/2490 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13032 event pairs, 0 based on Foata normal form. 0/2164 useless extension candidates. Maximal degree in co-relation 2809. Up to 56 conditions per place. [2023-09-01 09:26:31,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:31,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:31,559 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:26:31,559 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:31,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:31,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:26:33,582 INFO L130 PetriNetUnfolder]: 271/2490 cut-off events. [2023-09-01 09:26:33,582 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:26:33,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 2490 events. 271/2490 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13032 event pairs, 0 based on Foata normal form. 0/2164 useless extension candidates. Maximal degree in co-relation 2809. Up to 56 conditions per place. [2023-09-01 09:26:34,548 INFO L119 LiptonReduction]: Number of co-enabled transitions 4380480 Killed by 15