./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e12b29ddb474fc17e74c2b71eb245022640b1de10fdbbb130c7f22e13cd3653f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:38:24,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:38:24,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:38:24,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:38:24,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:38:24,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:38:24,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:38:24,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:38:24,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:38:24,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:38:24,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:38:24,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:38:24,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:38:24,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:38:24,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:38:24,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:38:24,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:38:24,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:38:24,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:38:24,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:38:24,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:38:24,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:38:24,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:38:24,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:38:24,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:38:24,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:38:24,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:38:24,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:38:24,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:38:24,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:38:24,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:38:24,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:38:24,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:38:24,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:38:24,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:38:24,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:38:24,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:38:24,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:38:24,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:38:24,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:38:24,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:38:24,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:38:24,350 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:38:24,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:38:24,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:38:24,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:38:24,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:38:24,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:38:24,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:38:24,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:38:24,354 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:38:24,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:38:24,354 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:38:24,355 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:38:24,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:38:24,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:38:24,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:38:24,355 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:38:24,356 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:38:24,356 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:38:24,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:38:24,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:38:24,356 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:38:24,357 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:38:24,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:38:24,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:38:24,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:38:24,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:38:24,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:38:24,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:38:24,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:38:24,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:38:24,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:38:24,359 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:38:24,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:38:24,359 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:38:24,359 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e12b29ddb474fc17e74c2b71eb245022640b1de10fdbbb130c7f22e13cd3653f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:38:24,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:38:24,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:38:24,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:38:24,686 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:38:24,686 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:38:24,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2023-08-31 22:38:25,927 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:38:26,187 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:38:26,192 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2023-08-31 22:38:26,214 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/520a58206/a9729f3706884d95a60eda08b45f0600/FLAG4e1499a7c [2023-08-31 22:38:26,231 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/520a58206/a9729f3706884d95a60eda08b45f0600 [2023-08-31 22:38:26,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:38:26,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:38:26,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:38:26,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:38:26,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:38:26,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd0f27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26, skipping insertion in model container [2023-08-31 22:38:26,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:38:26,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:38:26,561 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i[31166,31179] [2023-08-31 22:38:26,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:38:26,589 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:38:26,628 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i[31166,31179] [2023-08-31 22:38:26,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:38:26,664 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:38:26,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26 WrapperNode [2023-08-31 22:38:26,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:38:26,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:38:26,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:38:26,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:38:26,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,707 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 190 [2023-08-31 22:38:26,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:38:26,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:38:26,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:38:26,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:38:26,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,763 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:38:26,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:38:26,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:38:26,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:38:26,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (1/1) ... [2023-08-31 22:38:26,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:38:26,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:38:26,803 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 22:38:26,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 22:38:26,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:38:26,838 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 22:38:26,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 22:38:26,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:38:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:38:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:38:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:38:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:38:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:38:26,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:38:26,843 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:38:27,009 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:38:27,010 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:38:27,458 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:38:27,615 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:38:27,615 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 22:38:27,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:38:27 BoogieIcfgContainer [2023-08-31 22:38:27,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:38:27,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:38:27,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:38:27,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:38:27,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:38:26" (1/3) ... [2023-08-31 22:38:27,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3d08e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:38:27, skipping insertion in model container [2023-08-31 22:38:27,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:38:26" (2/3) ... [2023-08-31 22:38:27,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3d08e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:38:27, skipping insertion in model container [2023-08-31 22:38:27,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:38:27" (3/3) ... [2023-08-31 22:38:27,623 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-1.i [2023-08-31 22:38:27,645 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:38:27,646 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-31 22:38:27,646 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:38:27,735 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:27,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:27,826 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-31 22:38:27,827 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:38:27,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-31 22:38:27,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:27,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:27,839 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:27,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:27,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:27,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:38:27,884 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-31 22:38:27,888 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:38:27,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-31 22:38:27,893 INFO L119 LiptonReduction]: Number of co-enabled transitions 4248 [2023-08-31 22:38:33,114 INFO L134 LiptonReduction]: Checked pairs total: 8906 [2023-08-31 22:38:33,115 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-31 22:38:33,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:33,131 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:33,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:38:33,138 INFO L130 PetriNetUnfolder]: 2/32 cut-off events. [2023-08-31 22:38:33,138 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:38:33,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:38:33,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 22:38:33,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:38:33,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:38:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1466791183, now seen corresponding path program 1 times [2023-08-31 22:38:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:38:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632794089] [2023-08-31 22:38:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:38:33,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:38:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:33,305 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:38:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:33,366 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:38:33,368 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:38:33,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:38:33,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:38:33,371 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:38:33,373 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:38:33,374 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:38:33,374 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 22:38:33,475 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:33,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:33,554 INFO L130 PetriNetUnfolder]: 21/311 cut-off events. [2023-08-31 22:38:33,554 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:38:33,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 311 events. 21/311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 937 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-08-31 22:38:33,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:33,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:33,561 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:33,561 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:33,562 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:33,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:38:33,610 INFO L130 PetriNetUnfolder]: 21/311 cut-off events. [2023-08-31 22:38:33,611 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:38:33,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 311 events. 21/311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 937 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-08-31 22:38:33,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 36580 [2023-08-31 22:38:39,812 INFO L134 LiptonReduction]: Checked pairs total: 126176 [2023-08-31 22:38:39,812 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-31 22:38:39,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:39,815 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:39,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:38:39,824 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2023-08-31 22:38:39,824 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:38:39,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:38:39,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 22:38:39,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:38:39,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:38:39,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1209779092, now seen corresponding path program 1 times [2023-08-31 22:38:39,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:38:39,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850669189] [2023-08-31 22:38:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:38:39,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:38:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:39,868 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:38:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:39,888 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:38:39,888 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:38:39,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:38:39,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:38:39,889 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:38:39,890 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:38:39,890 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:38:39,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 22:38:39,988 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:39,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:38:40,078 INFO L130 PetriNetUnfolder]: 31/447 cut-off events. [2023-08-31 22:38:40,079 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:38:40,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 447 events. 31/447 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1685 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 371. Up to 8 conditions per place. [2023-08-31 22:38:40,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:38:40,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 377 places, 398 transitions, 817 flow [2023-08-31 22:38:40,093 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:40,093 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 377 places, 398 transitions, 817 flow [2023-08-31 22:38:40,093 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 377 places, 398 transitions, 817 flow [2023-08-31 22:38:40,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:38:40,192 INFO L130 PetriNetUnfolder]: 31/447 cut-off events. [2023-08-31 22:38:40,192 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:38:40,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 447 events. 31/447 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1685 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 371. Up to 8 conditions per place. [2023-08-31 22:38:40,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 96996 [2023-08-31 22:38:48,695 INFO L134 LiptonReduction]: Checked pairs total: 339414 [2023-08-31 22:38:48,695 INFO L136 LiptonReduction]: Total number of compositions: 330 [2023-08-31 22:38:48,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:48,698 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:48,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:38:48,710 INFO L130 PetriNetUnfolder]: 7/126 cut-off events. [2023-08-31 22:38:48,710 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:38:48,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:38:48,710 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 22:38:48,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:38:48,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:38:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash 899092402, now seen corresponding path program 1 times [2023-08-31 22:38:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:38:48,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992658783] [2023-08-31 22:38:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:38:48,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:38:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:48,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:38:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:48,750 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:38:48,751 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:38:48,751 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:38:48,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:38:48,751 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:38:48,752 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:38:48,752 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:38:48,752 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 22:38:48,870 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:48,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:38:49,001 INFO L130 PetriNetUnfolder]: 41/583 cut-off events. [2023-08-31 22:38:49,002 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:38:49,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 583 events. 41/583 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2534 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 489. Up to 10 conditions per place. [2023-08-31 22:38:49,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:38:49,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 517 transitions, 1066 flow [2023-08-31 22:38:49,024 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:49,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 489 places, 517 transitions, 1066 flow [2023-08-31 22:38:49,025 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 489 places, 517 transitions, 1066 flow [2023-08-31 22:38:49,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:38:49,174 INFO L130 PetriNetUnfolder]: 41/583 cut-off events. [2023-08-31 22:38:49,175 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:38:49,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 583 events. 41/583 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2534 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 489. Up to 10 conditions per place. [2023-08-31 22:38:49,228 INFO L119 LiptonReduction]: Number of co-enabled transitions 185496 [2023-08-31 22:38:59,979 INFO L134 LiptonReduction]: Checked pairs total: 596813 [2023-08-31 22:38:59,979 INFO L136 LiptonReduction]: Total number of compositions: 419 [2023-08-31 22:38:59,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:59,982 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:59,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:00,006 INFO L130 PetriNetUnfolder]: 14/205 cut-off events. [2023-08-31 22:39:00,006 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:39:00,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:00,006 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 22:39:00,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:00,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1264261348, now seen corresponding path program 1 times [2023-08-31 22:39:00,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:00,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012646739] [2023-08-31 22:39:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:00,030 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:00,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:00,052 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:00,053 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:00,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:39:00,053 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:00,053 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:00,054 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:00,054 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 22:39:00,166 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:00,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:00,373 INFO L130 PetriNetUnfolder]: 51/719 cut-off events. [2023-08-31 22:39:00,373 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:39:00,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 719 events. 51/719 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3422 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 607. Up to 12 conditions per place. [2023-08-31 22:39:00,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:00,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:00,401 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:00,402 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:00,402 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:00,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:39:00,596 INFO L130 PetriNetUnfolder]: 51/719 cut-off events. [2023-08-31 22:39:00,597 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:39:00,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 719 events. 51/719 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3422 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 607. Up to 12 conditions per place. [2023-08-31 22:39:00,679 INFO L119 LiptonReduction]: Number of co-enabled transitions 302080 [2023-08-31 22:39:13,700 INFO L134 LiptonReduction]: Checked pairs total: 936587 [2023-08-31 22:39:13,700 INFO L136 LiptonReduction]: Total number of compositions: 515 [2023-08-31 22:39:13,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:13,702 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:13,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:13,736 INFO L130 PetriNetUnfolder]: 22/282 cut-off events. [2023-08-31 22:39:13,736 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:39:13,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:13,737 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:39:13,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:13,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:13,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1418106041, now seen corresponding path program 1 times [2023-08-31 22:39:13,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:13,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108700840] [2023-08-31 22:39:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:13,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:13,760 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:13,782 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:13,782 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:13,782 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:13,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:39:13,783 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:13,783 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:13,783 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:13,784 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 22:39:13,942 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:13,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:14,291 INFO L130 PetriNetUnfolder]: 61/855 cut-off events. [2023-08-31 22:39:14,291 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:39:14,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 855 events. 61/855 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4325 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 738. Up to 14 conditions per place. [2023-08-31 22:39:14,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:14,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:14,331 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:14,331 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:14,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:14,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:39:14,620 INFO L130 PetriNetUnfolder]: 61/855 cut-off events. [2023-08-31 22:39:14,621 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:39:14,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 855 events. 61/855 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4325 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 738. Up to 14 conditions per place. [2023-08-31 22:39:14,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 446748 [2023-08-31 22:39:29,730 INFO L134 LiptonReduction]: Checked pairs total: 1452909 [2023-08-31 22:39:29,730 INFO L136 LiptonReduction]: Total number of compositions: 616 [2023-08-31 22:39:29,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:29,733 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:29,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:29,786 INFO L130 PetriNetUnfolder]: 28/358 cut-off events. [2023-08-31 22:39:29,786 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:39:29,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:29,787 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:39:29,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:29,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash -306706194, now seen corresponding path program 1 times [2023-08-31 22:39:29,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:29,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357731979] [2023-08-31 22:39:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:29,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:29,810 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:29,832 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:29,832 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:29,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:29,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:39:29,832 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:29,833 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:29,833 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:29,833 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 22:39:30,000 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:30,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:30,366 INFO L130 PetriNetUnfolder]: 71/991 cut-off events. [2023-08-31 22:39:30,366 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:39:30,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 991 events. 71/991 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5271 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 881. Up to 16 conditions per place. [2023-08-31 22:39:30,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:30,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:30,404 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:30,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:30,405 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:30,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:39:30,779 INFO L130 PetriNetUnfolder]: 71/991 cut-off events. [2023-08-31 22:39:30,779 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:39:30,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 991 events. 71/991 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5271 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 881. Up to 16 conditions per place. [2023-08-31 22:39:30,915 INFO L119 LiptonReduction]: Number of co-enabled transitions 619500 [2023-08-31 22:39:47,837 INFO L134 LiptonReduction]: Checked pairs total: 2263952 [2023-08-31 22:39:47,837 INFO L136 LiptonReduction]: Total number of compositions: 694 [2023-08-31 22:39:47,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:47,839 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:47,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:47,913 INFO L130 PetriNetUnfolder]: 35/435 cut-off events. [2023-08-31 22:39:47,913 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:39:47,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:47,913 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:39:47,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:47,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:47,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1672351494, now seen corresponding path program 1 times [2023-08-31 22:39:47,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:47,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17560431] [2023-08-31 22:39:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:47,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:47,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:47,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:47,991 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:47,992 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:47,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:39:47,992 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:47,993 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:47,993 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:47,993 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 22:39:48,140 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:48,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:39:48,572 INFO L130 PetriNetUnfolder]: 81/1127 cut-off events. [2023-08-31 22:39:48,572 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:39:48,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1127 events. 81/1127 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6169 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1025. Up to 18 conditions per place. [2023-08-31 22:39:48,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:39:48,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 937 places, 993 transitions, 2082 flow [2023-08-31 22:39:48,637 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:48,637 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 937 places, 993 transitions, 2082 flow [2023-08-31 22:39:48,637 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 937 places, 993 transitions, 2082 flow [2023-08-31 22:39:48,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:39:49,058 INFO L130 PetriNetUnfolder]: 81/1127 cut-off events. [2023-08-31 22:39:49,059 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:39:49,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1127 events. 81/1127 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6169 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1025. Up to 18 conditions per place. [2023-08-31 22:39:49,235 INFO L119 LiptonReduction]: Number of co-enabled transitions 820336 [2023-08-31 22:40:08,605 INFO L134 LiptonReduction]: Checked pairs total: 2694040 [2023-08-31 22:40:08,605 INFO L136 LiptonReduction]: Total number of compositions: 796 [2023-08-31 22:40:08,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:40:08,607 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:40:08,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:40:08,734 INFO L130 PetriNetUnfolder]: 43/514 cut-off events. [2023-08-31 22:40:08,734 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:40:08,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:40:08,735 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:40:08,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:40:08,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:40:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash 24339606, now seen corresponding path program 1 times [2023-08-31 22:40:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:40:08,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060034751] [2023-08-31 22:40:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:40:08,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:40:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:08,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:40:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:08,811 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:40:08,812 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:40:08,812 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:40:08,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:40:08,812 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:40:08,814 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:40:08,814 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:40:08,814 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 22:40:09,028 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:40:09,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:09,707 INFO L130 PetriNetUnfolder]: 91/1263 cut-off events. [2023-08-31 22:40:09,710 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:40:09,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1263 events. 91/1263 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7146 event pairs, 0 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1170. Up to 20 conditions per place. [2023-08-31 22:40:09,774 INFO L82 GeneralOperation]: Start removeDead. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:09,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:09,788 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:40:09,788 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:09,788 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:09,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:40:10,241 INFO L130 PetriNetUnfolder]: 91/1263 cut-off events. [2023-08-31 22:40:10,241 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:40:10,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1263 events. 91/1263 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7146 event pairs, 0 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1170. Up to 20 conditions per place. [2023-08-31 22:40:10,559 INFO L119 LiptonReduction]: Number of co-enabled transitions 1049256 [2023-08-31 22:40:32,861 INFO L134 LiptonReduction]: Checked pairs total: 3805572 [2023-08-31 22:40:32,861 INFO L136 LiptonReduction]: Total number of compositions: 892 [2023-08-31 22:40:32,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:40:32,864 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:40:32,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:40:32,993 INFO L130 PetriNetUnfolder]: 50/591 cut-off events. [2023-08-31 22:40:32,993 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:40:32,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:40:32,993 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:40:32,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:40:32,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:40:32,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1294917962, now seen corresponding path program 1 times [2023-08-31 22:40:32,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:40:32,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670832741] [2023-08-31 22:40:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:40:32,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:40:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:33,025 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:40:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:33,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:40:33,049 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:40:33,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:40:33,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:40:33,049 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:40:33,052 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:40:33,053 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:40:33,053 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 22:40:33,283 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:40:33,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:33,824 INFO L130 PetriNetUnfolder]: 101/1399 cut-off events. [2023-08-31 22:40:33,825 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:40:33,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1399 events. 101/1399 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8067 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 1316. Up to 22 conditions per place. [2023-08-31 22:40:33,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:33,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:33,922 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:40:33,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:33,922 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:33,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:40:34,455 INFO L130 PetriNetUnfolder]: 101/1399 cut-off events. [2023-08-31 22:40:34,455 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:40:34,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1399 events. 101/1399 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8067 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 1316. Up to 22 conditions per place. [2023-08-31 22:40:34,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 1306260 [2023-08-31 22:41:00,057 INFO L134 LiptonReduction]: Checked pairs total: 4772839 [2023-08-31 22:41:00,057 INFO L136 LiptonReduction]: Total number of compositions: 990 [2023-08-31 22:41:00,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:41:00,059 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:41:00,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:41:00,228 INFO L130 PetriNetUnfolder]: 57/669 cut-off events. [2023-08-31 22:41:00,229 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:41:00,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:41:00,229 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:41:00,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:41:00,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:41:00,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1525356355, now seen corresponding path program 1 times [2023-08-31 22:41:00,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:41:00,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561548872] [2023-08-31 22:41:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:41:00,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:41:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:00,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:41:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:00,275 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:41:00,276 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:41:00,276 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:41:00,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:41:00,276 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:41:00,277 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:41:00,277 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:41:00,277 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 22:41:00,451 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:41:00,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:01,155 INFO L130 PetriNetUnfolder]: 111/1535 cut-off events. [2023-08-31 22:41:01,156 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:41:01,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1535 events. 111/1535 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8995 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 1464. Up to 24 conditions per place. [2023-08-31 22:41:01,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:01,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:01,224 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:41:01,224 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:01,224 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:01,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:41:01,773 INFO L130 PetriNetUnfolder]: 111/1535 cut-off events. [2023-08-31 22:41:01,773 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:41:01,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1535 events. 111/1535 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8995 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 1464. Up to 24 conditions per place. [2023-08-31 22:41:02,256 INFO L119 LiptonReduction]: Number of co-enabled transitions 1591348 [2023-08-31 22:41:30,188 INFO L134 LiptonReduction]: Checked pairs total: 5931490 [2023-08-31 22:41:30,189 INFO L136 LiptonReduction]: Total number of compositions: 1098 [2023-08-31 22:41:30,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:41:30,192 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:41:30,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:41:30,337 INFO L130 PetriNetUnfolder]: 64/744 cut-off events. [2023-08-31 22:41:30,337 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:41:30,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:41:30,338 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:41:30,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:41:30,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:41:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash -864123118, now seen corresponding path program 1 times [2023-08-31 22:41:30,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:41:30,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681290835] [2023-08-31 22:41:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:41:30,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:41:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:30,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:41:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:30,390 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:41:30,390 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:41:30,391 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:41:30,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:41:30,391 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:41:30,391 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:41:30,392 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:41:30,392 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 22:41:30,628 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:41:30,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:31,392 INFO L130 PetriNetUnfolder]: 121/1671 cut-off events. [2023-08-31 22:41:31,393 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:41:31,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 1671 events. 121/1671 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9926 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1614. Up to 26 conditions per place. [2023-08-31 22:41:31,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:31,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:31,506 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:41:31,506 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:31,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:31,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:41:32,244 INFO L130 PetriNetUnfolder]: 121/1671 cut-off events. [2023-08-31 22:41:32,244 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:41:32,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 1671 events. 121/1671 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9926 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1614. Up to 26 conditions per place. [2023-08-31 22:41:32,556 INFO L119 LiptonReduction]: Number of co-enabled transitions 1904520 [2023-08-31 22:42:02,976 INFO L134 LiptonReduction]: Checked pairs total: 6195274 [2023-08-31 22:42:02,976 INFO L136 LiptonReduction]: Total number of compositions: 1171 [2023-08-31 22:42:02,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:42:02,978 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:42:02,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:42:03,312 INFO L130 PetriNetUnfolder]: 70/821 cut-off events. [2023-08-31 22:42:03,312 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:42:03,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:42:03,313 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:42:03,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:42:03,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:42:03,313 INFO L85 PathProgramCache]: Analyzing trace with hash 715230075, now seen corresponding path program 1 times [2023-08-31 22:42:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:42:03,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084610945] [2023-08-31 22:42:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:42:03,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:42:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:03,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:42:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:03,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:42:03,392 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:42:03,393 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:42:03,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:42:03,393 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:42:03,395 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:42:03,395 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:42:03,395 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 22:42:03,783 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:42:03,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:04,620 INFO L130 PetriNetUnfolder]: 131/1807 cut-off events. [2023-08-31 22:42:04,620 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:42:04,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 1807 events. 131/1807 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10880 event pairs, 0 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 1765. Up to 28 conditions per place. [2023-08-31 22:42:04,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:04,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:04,795 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:42:04,795 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:04,795 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:04,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:42:05,559 INFO L130 PetriNetUnfolder]: 131/1807 cut-off events. [2023-08-31 22:42:05,559 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:42:05,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 1807 events. 131/1807 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10880 event pairs, 0 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 1765. Up to 28 conditions per place. [2023-08-31 22:42:06,007 INFO L119 LiptonReduction]: Number of co-enabled transitions 2245776 [2023-08-31 22:42:39,039 INFO L134 LiptonReduction]: Checked pairs total: 8237028 [2023-08-31 22:42:39,040 INFO L136 LiptonReduction]: Total number of compositions: 1257 [2023-08-31 22:42:39,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:42:39,042 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:42:39,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:42:39,236 INFO L130 PetriNetUnfolder]: 78/902 cut-off events. [2023-08-31 22:42:39,236 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:42:39,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:42:39,236 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:42:39,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:42:39,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:42:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash 269357184, now seen corresponding path program 1 times [2023-08-31 22:42:39,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:42:39,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974513520] [2023-08-31 22:42:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:42:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:42:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:39,268 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:42:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:39,303 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:42:39,303 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:42:39,303 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:42:39,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:42:39,304 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:42:39,304 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:42:39,304 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:42:39,304 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 22:42:39,671 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:42:39,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:42:40,786 INFO L130 PetriNetUnfolder]: 141/1943 cut-off events. [2023-08-31 22:42:40,786 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:42:40,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1943 events. 141/1943 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11799 event pairs, 0 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 1917. Up to 30 conditions per place. [2023-08-31 22:42:40,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:42:40,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:42:40,996 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:42:40,996 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:42:40,996 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:42:40,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:42:41,961 INFO L130 PetriNetUnfolder]: 141/1943 cut-off events. [2023-08-31 22:42:41,962 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:42:42,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1943 events. 141/1943 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11799 event pairs, 0 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 1917. Up to 30 conditions per place. [2023-08-31 22:42:42,543 INFO L119 LiptonReduction]: Number of co-enabled transitions 2615116 [2023-08-31 22:43:19,140 INFO L134 LiptonReduction]: Checked pairs total: 9565905 [2023-08-31 22:43:19,140 INFO L136 LiptonReduction]: Total number of compositions: 1354 [2023-08-31 22:43:19,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:19,142 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:19,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:19,438 INFO L130 PetriNetUnfolder]: 84/976 cut-off events. [2023-08-31 22:43:19,439 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:43:19,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:19,439 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:43:19,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:19,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash -576661935, now seen corresponding path program 1 times [2023-08-31 22:43:19,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:19,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137701607] [2023-08-31 22:43:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:19,468 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:19,498 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:19,499 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:19,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:19,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:43:19,499 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:19,500 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:19,500 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:19,500 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 22:43:19,789 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:19,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:21,026 INFO L130 PetriNetUnfolder]: 151/2079 cut-off events. [2023-08-31 22:43:21,026 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:43:21,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 2079 events. 151/2079 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12698 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 2070. Up to 32 conditions per place. [2023-08-31 22:43:21,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:21,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:21,264 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:21,264 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:21,264 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:21,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:43:22,454 INFO L130 PetriNetUnfolder]: 151/2079 cut-off events. [2023-08-31 22:43:22,454 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:43:22,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 2079 events. 151/2079 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12698 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 2070. Up to 32 conditions per place. [2023-08-31 22:43:23,479 INFO L119 LiptonReduction]: Number of co-enabled transitions 3012540 [2023-08-31 22:44:02,907 INFO L134 LiptonReduction]: Checked pairs total: 9837000 [2023-08-31 22:44:02,908 INFO L136 LiptonReduction]: Total number of compositions: 1500 [2023-08-31 22:44:02,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:02,910 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:02,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:03,204 INFO L130 PetriNetUnfolder]: 91/1054 cut-off events. [2023-08-31 22:44:03,204 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:44:03,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:03,204 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:44:03,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:03,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:03,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1987508024, now seen corresponding path program 1 times [2023-08-31 22:44:03,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:03,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458647872] [2023-08-31 22:44:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:03,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:03,234 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:03,268 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:03,268 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:03,268 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:03,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:44:03,268 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:03,269 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:03,269 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:03,269 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 22:44:03,518 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:44:03,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:05,133 INFO L130 PetriNetUnfolder]: 161/2215 cut-off events. [2023-08-31 22:44:05,133 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:44:05,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 2215 events. 161/2215 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 13703 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 2224. Up to 34 conditions per place. [2023-08-31 22:44:05,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:05,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:05,486 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:44:05,487 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:05,487 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:05,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:44:07,461 INFO L130 PetriNetUnfolder]: 161/2215 cut-off events. [2023-08-31 22:44:07,461 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:44:07,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 2215 events. 161/2215 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 13703 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 2224. Up to 34 conditions per place. [2023-08-31 22:44:08,215 INFO L119 LiptonReduction]: Number of co-enabled transitions 3438048 [2023-08-31 22:44:50,585 INFO L134 LiptonReduction]: Checked pairs total: 12466357 [2023-08-31 22:44:50,585 INFO L136 LiptonReduction]: Total number of compositions: 1561 [2023-08-31 22:44:50,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:50,588 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:50,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:50,920 INFO L130 PetriNetUnfolder]: 98/1129 cut-off events. [2023-08-31 22:44:50,920 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:44:50,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:50,921 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:44:50,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:50,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash 983350106, now seen corresponding path program 1 times [2023-08-31 22:44:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:50,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185482587] [2023-08-31 22:44:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:50,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:50,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:50,993 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:50,993 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:50,994 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:50,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:44:50,994 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:50,994 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:50,995 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:50,995 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 22:44:51,262 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:44:51,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:44:53,101 INFO L130 PetriNetUnfolder]: 171/2351 cut-off events. [2023-08-31 22:44:53,101 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:44:53,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2351 events. 171/2351 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 14546 event pairs, 0 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 2379. Up to 36 conditions per place. [2023-08-31 22:44:53,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:44:53,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:44:53,284 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:44:53,284 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:44:53,285 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:44:53,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:44:54,915 INFO L130 PetriNetUnfolder]: 171/2351 cut-off events. [2023-08-31 22:44:54,915 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:44:55,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2351 events. 171/2351 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 14546 event pairs, 0 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 2379. Up to 36 conditions per place. [2023-08-31 22:44:55,737 INFO L119 LiptonReduction]: Number of co-enabled transitions 3891640 [2023-08-31 22:45:40,441 INFO L134 LiptonReduction]: Checked pairs total: 12664229 [2023-08-31 22:45:40,441 INFO L136 LiptonReduction]: Total number of compositions: 1624 [2023-08-31 22:45:40,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:40,444 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:40,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:40,918 INFO L130 PetriNetUnfolder]: 106/1209 cut-off events. [2023-08-31 22:45:40,918 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:45:40,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:40,918 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:40,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:40,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:40,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1990890871, now seen corresponding path program 1 times [2023-08-31 22:45:40,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:40,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228957702] [2023-08-31 22:45:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:40,955 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:40,992 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:40,992 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:40,993 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:40,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:45:40,993 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:40,993 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:40,993 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:40,993 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 22:45:41,364 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:41,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:45:43,286 INFO L130 PetriNetUnfolder]: 181/2487 cut-off events. [2023-08-31 22:45:43,287 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:45:43,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 2487 events. 181/2487 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 15515 event pairs, 0 based on Foata normal form. 0/1528 useless extension candidates. Maximal degree in co-relation 2535. Up to 38 conditions per place. [2023-08-31 22:45:43,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:45:43,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:45:43,507 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:43,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:45:43,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:45:43,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:45:45,287 INFO L130 PetriNetUnfolder]: 181/2487 cut-off events. [2023-08-31 22:45:45,287 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:45:45,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 2487 events. 181/2487 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 15515 event pairs, 0 based on Foata normal form. 0/1528 useless extension candidates. Maximal degree in co-relation 2535. Up to 38 conditions per place. [2023-08-31 22:45:46,200 INFO L119 LiptonReduction]: Number of co-enabled transitions 4373316 [2023-08-31 22:46:36,043 INFO L134 LiptonReduction]: Checked pairs total: 15781083 [2023-08-31 22:46:36,043 INFO L136 LiptonReduction]: Total number of compositions: 1756 [2023-08-31 22:46:36,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:36,045 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:36,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:36,470 INFO L130 PetriNetUnfolder]: 113/1285 cut-off events. [2023-08-31 22:46:36,470 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:46:36,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:36,470 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:46:36,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:36,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash -528127944, now seen corresponding path program 1 times [2023-08-31 22:46:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:36,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513546582] [2023-08-31 22:46:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:36,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:36,566 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:36,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:36,603 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:36,603 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:36,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:46:36,604 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:36,604 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:36,604 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:36,604 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 22:46:36,884 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:36,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:46:38,957 INFO L130 PetriNetUnfolder]: 191/2623 cut-off events. [2023-08-31 22:46:38,957 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:46:39,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 2623 events. 191/2623 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 16501 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 2692. Up to 40 conditions per place. [2023-08-31 22:46:39,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:46:39,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:46:39,221 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:39,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:46:39,221 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:46:39,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:46:41,420 INFO L130 PetriNetUnfolder]: 191/2623 cut-off events. [2023-08-31 22:46:41,420 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:46:41,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 2623 events. 191/2623 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 16501 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 2692. Up to 40 conditions per place. [2023-08-31 22:46:42,450 INFO L119 LiptonReduction]: Number of co-enabled transitions 4883076 [2023-08-31 22:47:35,599 INFO L134 LiptonReduction]: Checked pairs total: 15716525 [2023-08-31 22:47:35,599 INFO L136 LiptonReduction]: Total number of compositions: 1855 [2023-08-31 22:47:35,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:47:35,601 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:47:35,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:47:36,205 INFO L130 PetriNetUnfolder]: 120/1363 cut-off events. [2023-08-31 22:47:36,205 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:47:36,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:47:36,205 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:47:36,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:47:36,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:47:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1617347922, now seen corresponding path program 1 times [2023-08-31 22:47:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:47:36,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344395324] [2023-08-31 22:47:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:47:36,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:47:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:36,248 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:47:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:36,289 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:47:36,289 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:47:36,289 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:47:36,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:47:36,290 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:47:36,290 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:47:36,290 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:47:36,290 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 22:47:36,895 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:47:36,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:47:39,280 INFO L130 PetriNetUnfolder]: 201/2759 cut-off events. [2023-08-31 22:47:39,280 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:47:39,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 2759 events. 201/2759 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 17404 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2850. Up to 42 conditions per place. [2023-08-31 22:47:39,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:47:39,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:47:39,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:47:39,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:47:39,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:47:39,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:47:41,918 INFO L130 PetriNetUnfolder]: 201/2759 cut-off events. [2023-08-31 22:47:41,918 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:47:42,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 2759 events. 201/2759 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 17404 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2850. Up to 42 conditions per place. [2023-08-31 22:47:43,016 INFO L119 LiptonReduction]: Number of co-enabled transitions 5420920 [2023-08-31 22:48:38,782 INFO L134 LiptonReduction]: Checked pairs total: 19338241 [2023-08-31 22:48:38,782 INFO L136 LiptonReduction]: Total number of compositions: 1925 [2023-08-31 22:48:38,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:48:38,785 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:48:38,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:48:39,370 INFO L130 PetriNetUnfolder]: 126/1437 cut-off events. [2023-08-31 22:48:39,370 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:48:39,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:48:39,370 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:48:39,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:48:39,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:48:39,370 INFO L85 PathProgramCache]: Analyzing trace with hash -334844340, now seen corresponding path program 1 times [2023-08-31 22:48:39,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:48:39,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110892028] [2023-08-31 22:48:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:48:39,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:48:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:39,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:48:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:39,449 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:48:39,449 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:48:39,450 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:48:39,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:48:39,450 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:48:39,450 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:48:39,450 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:48:39,451 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 22:48:39,759 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:48:39,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:48:42,413 INFO L130 PetriNetUnfolder]: 211/2895 cut-off events. [2023-08-31 22:48:42,413 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:48:42,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 2895 events. 211/2895 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 18339 event pairs, 0 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3009. Up to 44 conditions per place. [2023-08-31 22:48:42,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:48:42,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:48:42,714 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:48:42,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:48:42,715 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:48:42,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:48:45,276 INFO L130 PetriNetUnfolder]: 211/2895 cut-off events. [2023-08-31 22:48:45,276 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:48:45,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 2895 events. 211/2895 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 18339 event pairs, 0 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3009. Up to 44 conditions per place. [2023-08-31 22:48:46,466 INFO L119 LiptonReduction]: Number of co-enabled transitions 5986848 [2023-08-31 22:49:45,356 INFO L134 LiptonReduction]: Checked pairs total: 19463730 [2023-08-31 22:49:45,356 INFO L136 LiptonReduction]: Total number of compositions: 2019 [2023-08-31 22:49:45,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:49:45,358 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3fdd1c21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:49:45,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:49:46,014 INFO L130 PetriNetUnfolder]: 134/1517 cut-off events. [2023-08-31 22:49:46,014 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:49:46,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:49:46,014 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:49:46,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:49:46,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:49:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1825126112, now seen corresponding path program 1 times [2023-08-31 22:49:46,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:49:46,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836296401] [2023-08-31 22:49:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:49:46,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:49:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:46,061 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:49:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:46,107 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:49:46,107 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:49:46,107 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:49:46,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 22:49:46,108 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:49:46,108 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:49:46,108 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:49:46,108 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 22:49:46,471 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:49:46,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:49:49,417 INFO L130 PetriNetUnfolder]: 221/3031 cut-off events. [2023-08-31 22:49:49,418 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:49:49,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3351 conditions, 3031 events. 221/3031 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 19286 event pairs, 0 based on Foata normal form. 0/1860 useless extension candidates. Maximal degree in co-relation 3169. Up to 46 conditions per place. [2023-08-31 22:49:49,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:49:49,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:49:49,775 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:49:49,776 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:49:49,776 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2505 places, 2659 transitions, 5890 flow [2023-08-31 22:49:49,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2505 places, 2659 transitions, 5890 flow Killed by 15