./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:27:54,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:27:54,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:27:54,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:27:54,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:27:54,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:27:54,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:27:54,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:27:54,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:27:54,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:27:54,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:27:54,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:27:54,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:27:54,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:27:54,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:27:54,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:27:54,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:27:54,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:27:54,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:27:54,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:27:54,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:27:54,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:27:54,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:27:54,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:27:54,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:27:54,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:27:54,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:27:54,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:27:54,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:27:54,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:27:54,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:27:54,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:27:54,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:27:54,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:27:54,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:27:54,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:27:54,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:27:54,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:27:54,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:27:54,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:27:54,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:27:54,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:27:54,908 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:27:54,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:27:54,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:27:54,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:27:54,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:27:54,911 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:27:54,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:27:54,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:27:54,911 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:27:54,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:27:54,912 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:27:54,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:27:54,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:27:54,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:27:54,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:27:54,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:27:54,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:27:54,914 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:27:54,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:27:54,914 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:27:54,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:27:54,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:27:54,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:27:54,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:27:54,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:27:54,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:27:54,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:27:54,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:27:54,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:27:54,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:27:54,916 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:27:54,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:27:54,916 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:27:54,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:27:54,917 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:27:54,917 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:27:55,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:27:55,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:27:55,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:27:55,255 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:27:55,255 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:27:55,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-09-01 09:27:56,317 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:27:56,573 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:27:56,574 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-09-01 09:27:56,583 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a7b02527/926bb3e20ceb46a08e8226a346efbb36/FLAG05019e59c [2023-09-01 09:27:56,596 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a7b02527/926bb3e20ceb46a08e8226a346efbb36 [2023-09-01 09:27:56,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:27:56,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:27:56,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:27:56,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:27:56,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:27:56,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:27:56" (1/1) ... [2023-09-01 09:27:56,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d994925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:56, skipping insertion in model container [2023-09-01 09:27:56,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:27:56" (1/1) ... [2023-09-01 09:27:56,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:27:56,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:27:56,997 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/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-09-01 09:27:57,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:27:57,014 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:27:57,057 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/37_stack_lock_p0_vs_concur.i[30726,30739] [2023-09-01 09:27:57,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:27:57,102 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:27:57,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57 WrapperNode [2023-09-01 09:27:57,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:27:57,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:27:57,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:27:57,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:27:57,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,163 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 83 [2023-09-01 09:27:57,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:27:57,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:27:57,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:27:57,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:27:57,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,203 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:27:57,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:27:57,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:27:57,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:27:57,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (1/1) ... [2023-09-01 09:27:57,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:27:57,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:27:57,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 09:27:57,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 09:27:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 09:27:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 09:27:57,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 09:27:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:27:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:27:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:27:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:27:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:27:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:27:57,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:27:57,286 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 09:27:57,428 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:27:57,430 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:27:57,565 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:27:57,625 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:27:57,626 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 09:27:57,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:27:57 BoogieIcfgContainer [2023-09-01 09:27:57,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:27:57,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:27:57,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:27:57,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:27:57,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:27:56" (1/3) ... [2023-09-01 09:27:57,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4070988a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:27:57, skipping insertion in model container [2023-09-01 09:27:57,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:27:57" (2/3) ... [2023-09-01 09:27:57,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4070988a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:27:57, skipping insertion in model container [2023-09-01 09:27:57,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:27:57" (3/3) ... [2023-09-01 09:27:57,640 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-09-01 09:27:57,646 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:27:57,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:27:57,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:27:57,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:27:57,711 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:57,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 73 transitions, 151 flow [2023-09-01 09:27:57,769 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2023-09-01 09:27:57,770 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:27:57,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2023-09-01 09:27:57,774 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 73 transitions, 151 flow [2023-09-01 09:27:57,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 73 transitions, 151 flow [2023-09-01 09:27:57,780 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:57,793 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 73 transitions, 151 flow [2023-09-01 09:27:57,796 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 73 transitions, 151 flow [2023-09-01 09:27:57,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 73 transitions, 151 flow [2023-09-01 09:27:57,822 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2023-09-01 09:27:57,823 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:27:57,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2023-09-01 09:27:57,824 INFO L119 LiptonReduction]: Number of co-enabled transitions 1170 [2023-09-01 09:27:59,051 INFO L134 LiptonReduction]: Checked pairs total: 1376 [2023-09-01 09:27:59,052 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-09-01 09:27:59,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:59,082 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:59,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:59,086 INFO L130 PetriNetUnfolder]: 0/11 cut-off events. [2023-09-01 09:27:59,087 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:27:59,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:59,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 09:27:59,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:59,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1806875465, now seen corresponding path program 1 times [2023-09-01 09:27:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:59,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651735114] [2023-09-01 09:27:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:59,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:59,183 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:59,209 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:59,211 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:59,212 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:59,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:27:59,219 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:59,223 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:59,223 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:59,224 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 09:27:59,272 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:59,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 119 transitions, 250 flow [2023-09-01 09:27:59,331 INFO L130 PetriNetUnfolder]: 13/141 cut-off events. [2023-09-01 09:27:59,331 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:27:59,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 141 events. 13/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 301 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2023-09-01 09:27:59,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 119 transitions, 250 flow [2023-09-01 09:27:59,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 119 transitions, 250 flow [2023-09-01 09:27:59,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:59,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 119 transitions, 250 flow [2023-09-01 09:27:59,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 119 transitions, 250 flow [2023-09-01 09:27:59,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 119 transitions, 250 flow [2023-09-01 09:27:59,368 INFO L130 PetriNetUnfolder]: 13/141 cut-off events. [2023-09-01 09:27:59,368 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:27:59,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 141 events. 13/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 301 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2023-09-01 09:27:59,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 6480 [2023-09-01 09:28:00,651 INFO L134 LiptonReduction]: Checked pairs total: 15960 [2023-09-01 09:28:00,651 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-09-01 09:28:00,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:00,654 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:00,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:00,659 INFO L130 PetriNetUnfolder]: 1/32 cut-off events. [2023-09-01 09:28:00,659 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:28:00,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:00,659 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 09:28:00,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:00,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:00,660 INFO L85 PathProgramCache]: Analyzing trace with hash 217247913, now seen corresponding path program 1 times [2023-09-01 09:28:00,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:00,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392273714] [2023-09-01 09:28:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:00,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:00,681 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:00,699 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:00,699 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:00,699 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:00,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:28:00,700 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:00,700 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:00,700 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:00,701 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 09:28:00,727 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:00,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 165 transitions, 351 flow [2023-09-01 09:28:00,764 INFO L130 PetriNetUnfolder]: 19/199 cut-off events. [2023-09-01 09:28:00,764 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:28:00,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 199 events. 19/199 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 558 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-09-01 09:28:00,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 165 transitions, 351 flow [2023-09-01 09:28:00,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 165 transitions, 351 flow [2023-09-01 09:28:00,770 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:00,775 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 165 transitions, 351 flow [2023-09-01 09:28:00,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 165 transitions, 351 flow [2023-09-01 09:28:00,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 165 transitions, 351 flow [2023-09-01 09:28:00,795 INFO L130 PetriNetUnfolder]: 19/199 cut-off events. [2023-09-01 09:28:00,795 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:28:00,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 199 events. 19/199 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 558 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-09-01 09:28:00,803 INFO L119 LiptonReduction]: Number of co-enabled transitions 15930 [2023-09-01 09:28:02,328 INFO L134 LiptonReduction]: Checked pairs total: 41600 [2023-09-01 09:28:02,328 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-09-01 09:28:02,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:02,331 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:02,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:02,335 INFO L130 PetriNetUnfolder]: 2/50 cut-off events. [2023-09-01 09:28:02,336 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:28:02,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:02,336 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 09:28:02,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:02,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1105505255, now seen corresponding path program 1 times [2023-09-01 09:28:02,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:02,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488839521] [2023-09-01 09:28:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:02,356 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:02,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:02,383 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:02,383 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:02,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:28:02,383 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:02,384 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:02,384 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:02,384 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 09:28:02,417 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:02,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 211 transitions, 454 flow [2023-09-01 09:28:02,471 INFO L130 PetriNetUnfolder]: 25/257 cut-off events. [2023-09-01 09:28:02,471 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:28:02,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 257 events. 25/257 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 207. Up to 10 conditions per place. [2023-09-01 09:28:02,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 211 transitions, 454 flow [2023-09-01 09:28:02,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 211 transitions, 454 flow [2023-09-01 09:28:02,475 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:02,475 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 211 transitions, 454 flow [2023-09-01 09:28:02,476 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 211 transitions, 454 flow [2023-09-01 09:28:02,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 211 transitions, 454 flow [2023-09-01 09:28:02,502 INFO L130 PetriNetUnfolder]: 25/257 cut-off events. [2023-09-01 09:28:02,502 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:28:02,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 257 events. 25/257 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 815 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 207. Up to 10 conditions per place. [2023-09-01 09:28:02,517 INFO L119 LiptonReduction]: Number of co-enabled transitions 29520 [2023-09-01 09:28:04,350 INFO L134 LiptonReduction]: Checked pairs total: 76824 [2023-09-01 09:28:04,350 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-09-01 09:28:04,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:04,352 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:04,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:04,359 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2023-09-01 09:28:04,360 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:28:04,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:04,360 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:04,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:04,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2141982002, now seen corresponding path program 1 times [2023-09-01 09:28:04,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:04,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26469505] [2023-09-01 09:28:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:04,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:04,397 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:04,413 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:04,414 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:04,414 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:04,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:28:04,414 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:04,415 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:04,415 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:04,415 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 09:28:04,445 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:04,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 257 transitions, 559 flow [2023-09-01 09:28:04,484 INFO L130 PetriNetUnfolder]: 31/315 cut-off events. [2023-09-01 09:28:04,484 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:28:04,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 315 events. 31/315 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1058 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-09-01 09:28:04,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 257 transitions, 559 flow [2023-09-01 09:28:04,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 257 transitions, 559 flow [2023-09-01 09:28:04,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:04,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 257 transitions, 559 flow [2023-09-01 09:28:04,491 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 257 transitions, 559 flow [2023-09-01 09:28:04,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 257 transitions, 559 flow [2023-09-01 09:28:04,530 INFO L130 PetriNetUnfolder]: 31/315 cut-off events. [2023-09-01 09:28:04,530 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:28:04,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 315 events. 31/315 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1058 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-09-01 09:28:04,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 47250 [2023-09-01 09:28:06,686 INFO L134 LiptonReduction]: Checked pairs total: 127905 [2023-09-01 09:28:06,687 INFO L136 LiptonReduction]: Total number of compositions: 197 [2023-09-01 09:28:06,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:06,689 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:06,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:06,700 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2023-09-01 09:28:06,700 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:28:06,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:06,700 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:06,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:06,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2128711539, now seen corresponding path program 1 times [2023-09-01 09:28:06,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:06,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481305277] [2023-09-01 09:28:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:06,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:06,755 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:06,783 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:06,786 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:06,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:06,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:28:06,787 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:06,788 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:06,788 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:06,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 09:28:06,826 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:06,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 303 transitions, 666 flow [2023-09-01 09:28:06,899 INFO L130 PetriNetUnfolder]: 37/373 cut-off events. [2023-09-01 09:28:06,900 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:28:06,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 373 events. 37/373 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1324 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 334. Up to 14 conditions per place. [2023-09-01 09:28:06,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 285 places, 303 transitions, 666 flow [2023-09-01 09:28:06,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 285 places, 303 transitions, 666 flow [2023-09-01 09:28:06,909 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:06,909 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 285 places, 303 transitions, 666 flow [2023-09-01 09:28:06,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 285 places, 303 transitions, 666 flow [2023-09-01 09:28:06,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 285 places, 303 transitions, 666 flow [2023-09-01 09:28:06,982 INFO L130 PetriNetUnfolder]: 37/373 cut-off events. [2023-09-01 09:28:06,983 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:28:06,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 373 events. 37/373 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1324 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 334. Up to 14 conditions per place. [2023-09-01 09:28:07,003 INFO L119 LiptonReduction]: Number of co-enabled transitions 69120 [2023-09-01 09:28:09,112 INFO L134 LiptonReduction]: Checked pairs total: 189206 [2023-09-01 09:28:09,112 INFO L136 LiptonReduction]: Total number of compositions: 224 [2023-09-01 09:28:09,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:09,114 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:09,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:09,127 INFO L130 PetriNetUnfolder]: 10/130 cut-off events. [2023-09-01 09:28:09,127 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:28:09,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:09,128 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:09,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:09,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash -761070409, now seen corresponding path program 1 times [2023-09-01 09:28:09,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:09,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680182864] [2023-09-01 09:28:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:09,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:09,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:09,199 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:09,203 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:09,203 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:09,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:28:09,203 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:09,204 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:09,206 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:09,206 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 09:28:09,247 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:09,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 349 transitions, 775 flow [2023-09-01 09:28:09,316 INFO L130 PetriNetUnfolder]: 43/431 cut-off events. [2023-09-01 09:28:09,316 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:28:09,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 431 events. 43/431 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1559 event pairs, 0 based on Foata normal form. 0/373 useless extension candidates. Maximal degree in co-relation 401. Up to 16 conditions per place. [2023-09-01 09:28:09,324 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 349 transitions, 775 flow [2023-09-01 09:28:09,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 328 places, 349 transitions, 775 flow [2023-09-01 09:28:09,328 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:09,328 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 328 places, 349 transitions, 775 flow [2023-09-01 09:28:09,329 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 328 places, 349 transitions, 775 flow [2023-09-01 09:28:09,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 349 transitions, 775 flow [2023-09-01 09:28:09,394 INFO L130 PetriNetUnfolder]: 43/431 cut-off events. [2023-09-01 09:28:09,395 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:28:09,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 431 events. 43/431 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1559 event pairs, 0 based on Foata normal form. 0/373 useless extension candidates. Maximal degree in co-relation 401. Up to 16 conditions per place. [2023-09-01 09:28:09,446 INFO L119 LiptonReduction]: Number of co-enabled transitions 95130 [2023-09-01 09:28:11,878 INFO L134 LiptonReduction]: Checked pairs total: 261442 [2023-09-01 09:28:11,878 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-09-01 09:28:11,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:11,880 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:11,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:11,899 INFO L130 PetriNetUnfolder]: 12/154 cut-off events. [2023-09-01 09:28:11,899 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:28:11,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:11,899 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:11,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:11,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:11,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1742793184, now seen corresponding path program 1 times [2023-09-01 09:28:11,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:11,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966119152] [2023-09-01 09:28:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:11,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:11,934 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:11,968 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:11,970 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:11,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:11,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:28:11,971 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:11,972 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:11,972 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:11,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 09:28:12,015 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:12,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 371 places, 395 transitions, 886 flow [2023-09-01 09:28:12,123 INFO L130 PetriNetUnfolder]: 49/489 cut-off events. [2023-09-01 09:28:12,124 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:28:12,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 489 events. 49/489 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1838 event pairs, 0 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 469. Up to 18 conditions per place. [2023-09-01 09:28:12,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 371 places, 395 transitions, 886 flow [2023-09-01 09:28:12,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 371 places, 395 transitions, 886 flow [2023-09-01 09:28:12,139 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:12,139 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 371 places, 395 transitions, 886 flow [2023-09-01 09:28:12,139 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 371 places, 395 transitions, 886 flow [2023-09-01 09:28:12,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 371 places, 395 transitions, 886 flow [2023-09-01 09:28:12,236 INFO L130 PetriNetUnfolder]: 49/489 cut-off events. [2023-09-01 09:28:12,236 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:28:12,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 489 events. 49/489 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1838 event pairs, 0 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 469. Up to 18 conditions per place. [2023-09-01 09:28:12,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 125280 [2023-09-01 09:28:15,145 INFO L134 LiptonReduction]: Checked pairs total: 341667 [2023-09-01 09:28:15,145 INFO L136 LiptonReduction]: Total number of compositions: 296 [2023-09-01 09:28:15,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:15,149 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:15,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:15,169 INFO L130 PetriNetUnfolder]: 15/182 cut-off events. [2023-09-01 09:28:15,170 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:28:15,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:15,170 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:15,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:15,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:15,171 INFO L85 PathProgramCache]: Analyzing trace with hash 359258469, now seen corresponding path program 1 times [2023-09-01 09:28:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:15,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000349667] [2023-09-01 09:28:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:15,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:15,193 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:15,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:15,215 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:15,215 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:15,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:28:15,215 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:15,216 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:15,216 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:15,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 09:28:15,263 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:15,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 441 transitions, 999 flow [2023-09-01 09:28:15,404 INFO L130 PetriNetUnfolder]: 55/547 cut-off events. [2023-09-01 09:28:15,404 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:28:15,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 547 events. 55/547 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2069 event pairs, 0 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 538. Up to 20 conditions per place. [2023-09-01 09:28:15,414 INFO L82 GeneralOperation]: Start removeDead. Operand has 414 places, 441 transitions, 999 flow [2023-09-01 09:28:15,421 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 441 transitions, 999 flow [2023-09-01 09:28:15,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:15,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 414 places, 441 transitions, 999 flow [2023-09-01 09:28:15,422 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 414 places, 441 transitions, 999 flow [2023-09-01 09:28:15,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 414 places, 441 transitions, 999 flow [2023-09-01 09:28:15,528 INFO L130 PetriNetUnfolder]: 55/547 cut-off events. [2023-09-01 09:28:15,528 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:28:15,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 547 events. 55/547 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2069 event pairs, 0 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 538. Up to 20 conditions per place. [2023-09-01 09:28:15,610 INFO L119 LiptonReduction]: Number of co-enabled transitions 159570 [2023-09-01 09:28:18,510 INFO L134 LiptonReduction]: Checked pairs total: 428795 [2023-09-01 09:28:18,511 INFO L136 LiptonReduction]: Total number of compositions: 329 [2023-09-01 09:28:18,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:18,513 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:18,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:18,535 INFO L130 PetriNetUnfolder]: 17/207 cut-off events. [2023-09-01 09:28:18,535 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:28:18,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:18,536 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:18,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:18,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1863124865, now seen corresponding path program 1 times [2023-09-01 09:28:18,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:18,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889983117] [2023-09-01 09:28:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:18,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:18,564 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:18,583 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:18,583 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:18,584 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:18,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:28:18,584 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:18,587 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:18,587 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:18,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 09:28:18,637 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:18,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 457 places, 487 transitions, 1114 flow [2023-09-01 09:28:18,792 INFO L130 PetriNetUnfolder]: 61/605 cut-off events. [2023-09-01 09:28:18,792 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:28:18,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 605 events. 61/605 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2341 event pairs, 0 based on Foata normal form. 0/523 useless extension candidates. Maximal degree in co-relation 608. Up to 22 conditions per place. [2023-09-01 09:28:18,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 457 places, 487 transitions, 1114 flow [2023-09-01 09:28:18,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 457 places, 487 transitions, 1114 flow [2023-09-01 09:28:18,810 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:18,810 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 457 places, 487 transitions, 1114 flow [2023-09-01 09:28:18,810 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 457 places, 487 transitions, 1114 flow [2023-09-01 09:28:18,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 457 places, 487 transitions, 1114 flow [2023-09-01 09:28:18,972 INFO L130 PetriNetUnfolder]: 61/605 cut-off events. [2023-09-01 09:28:18,973 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:28:18,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 605 events. 61/605 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2341 event pairs, 0 based on Foata normal form. 0/523 useless extension candidates. Maximal degree in co-relation 608. Up to 22 conditions per place. [2023-09-01 09:28:19,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 198000 [2023-09-01 09:28:22,255 INFO L134 LiptonReduction]: Checked pairs total: 524432 [2023-09-01 09:28:22,255 INFO L136 LiptonReduction]: Total number of compositions: 353 [2023-09-01 09:28:22,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:22,257 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:22,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:22,283 INFO L130 PetriNetUnfolder]: 16/229 cut-off events. [2023-09-01 09:28:22,283 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:28:22,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:22,283 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:22,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:22,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2055235355, now seen corresponding path program 1 times [2023-09-01 09:28:22,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:22,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854431491] [2023-09-01 09:28:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:22,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:22,301 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:22,316 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:22,316 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:22,316 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:22,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:28:22,316 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:22,317 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:22,317 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:22,317 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 09:28:22,377 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:22,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 533 transitions, 1231 flow [2023-09-01 09:28:22,524 INFO L130 PetriNetUnfolder]: 67/663 cut-off events. [2023-09-01 09:28:22,524 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:28:22,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 663 events. 67/663 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2600 event pairs, 0 based on Foata normal form. 0/573 useless extension candidates. Maximal degree in co-relation 679. Up to 24 conditions per place. [2023-09-01 09:28:22,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 500 places, 533 transitions, 1231 flow [2023-09-01 09:28:22,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 500 places, 533 transitions, 1231 flow [2023-09-01 09:28:22,542 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:22,542 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 500 places, 533 transitions, 1231 flow [2023-09-01 09:28:22,543 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 500 places, 533 transitions, 1231 flow [2023-09-01 09:28:22,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 533 transitions, 1231 flow [2023-09-01 09:28:22,697 INFO L130 PetriNetUnfolder]: 67/663 cut-off events. [2023-09-01 09:28:22,697 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:28:22,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 663 events. 67/663 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2600 event pairs, 0 based on Foata normal form. 0/573 useless extension candidates. Maximal degree in co-relation 679. Up to 24 conditions per place. [2023-09-01 09:28:22,780 INFO L119 LiptonReduction]: Number of co-enabled transitions 240570 [2023-09-01 09:28:26,413 INFO L134 LiptonReduction]: Checked pairs total: 654070 [2023-09-01 09:28:26,414 INFO L136 LiptonReduction]: Total number of compositions: 391 [2023-09-01 09:28:26,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:26,415 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:26,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:26,440 INFO L130 PetriNetUnfolder]: 21/257 cut-off events. [2023-09-01 09:28:26,440 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:28:26,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:26,441 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:26,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:26,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash -539412961, now seen corresponding path program 1 times [2023-09-01 09:28:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:26,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902571933] [2023-09-01 09:28:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:26,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:26,486 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:26,512 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:26,512 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:26,513 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:26,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 09:28:26,513 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:26,514 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:26,514 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:26,514 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 09:28:26,575 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:26,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 543 places, 579 transitions, 1350 flow [2023-09-01 09:28:26,780 INFO L130 PetriNetUnfolder]: 73/721 cut-off events. [2023-09-01 09:28:26,781 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:28:26,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 721 events. 73/721 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2840 event pairs, 0 based on Foata normal form. 0/623 useless extension candidates. Maximal degree in co-relation 751. Up to 26 conditions per place. [2023-09-01 09:28:26,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 543 places, 579 transitions, 1350 flow [2023-09-01 09:28:26,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 543 places, 579 transitions, 1350 flow [2023-09-01 09:28:26,802 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:26,802 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 543 places, 579 transitions, 1350 flow [2023-09-01 09:28:26,802 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 543 places, 579 transitions, 1350 flow [2023-09-01 09:28:26,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 543 places, 579 transitions, 1350 flow [2023-09-01 09:28:26,985 INFO L130 PetriNetUnfolder]: 73/721 cut-off events. [2023-09-01 09:28:26,985 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:28:27,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 721 events. 73/721 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2840 event pairs, 0 based on Foata normal form. 0/623 useless extension candidates. Maximal degree in co-relation 751. Up to 26 conditions per place. [2023-09-01 09:28:27,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 287280 [2023-09-01 09:28:30,747 INFO L134 LiptonReduction]: Checked pairs total: 779067 [2023-09-01 09:28:30,748 INFO L136 LiptonReduction]: Total number of compositions: 422 [2023-09-01 09:28:30,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:30,753 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:30,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:30,787 INFO L130 PetriNetUnfolder]: 22/279 cut-off events. [2023-09-01 09:28:30,787 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:28:30,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:30,788 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:30,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:30,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:30,788 INFO L85 PathProgramCache]: Analyzing trace with hash -599785084, now seen corresponding path program 1 times [2023-09-01 09:28:30,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:30,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867241173] [2023-09-01 09:28:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:30,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:30,809 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:30,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:30,863 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:30,864 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:30,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 09:28:30,864 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:30,865 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:30,865 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:30,865 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 09:28:30,924 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:30,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 586 places, 625 transitions, 1471 flow [2023-09-01 09:28:31,129 INFO L130 PetriNetUnfolder]: 79/779 cut-off events. [2023-09-01 09:28:31,129 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:28:31,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 779 events. 79/779 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 3085 event pairs, 0 based on Foata normal form. 0/673 useless extension candidates. Maximal degree in co-relation 824. Up to 28 conditions per place. [2023-09-01 09:28:31,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 586 places, 625 transitions, 1471 flow [2023-09-01 09:28:31,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 586 places, 625 transitions, 1471 flow [2023-09-01 09:28:31,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:31,163 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 586 places, 625 transitions, 1471 flow [2023-09-01 09:28:31,164 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 586 places, 625 transitions, 1471 flow [2023-09-01 09:28:31,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 586 places, 625 transitions, 1471 flow [2023-09-01 09:28:31,392 INFO L130 PetriNetUnfolder]: 79/779 cut-off events. [2023-09-01 09:28:31,392 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:28:31,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 779 events. 79/779 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 3085 event pairs, 0 based on Foata normal form. 0/673 useless extension candidates. Maximal degree in co-relation 824. Up to 28 conditions per place. [2023-09-01 09:28:31,452 INFO L119 LiptonReduction]: Number of co-enabled transitions 338130 [2023-09-01 09:28:35,714 INFO L134 LiptonReduction]: Checked pairs total: 942902 [2023-09-01 09:28:35,715 INFO L136 LiptonReduction]: Total number of compositions: 462 [2023-09-01 09:28:35,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:35,716 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:35,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:35,764 INFO L130 PetriNetUnfolder]: 29/317 cut-off events. [2023-09-01 09:28:35,764 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:28:35,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:35,764 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:35,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:35,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:35,765 INFO L85 PathProgramCache]: Analyzing trace with hash 228926403, now seen corresponding path program 1 times [2023-09-01 09:28:35,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:35,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247257290] [2023-09-01 09:28:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:35,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:35,795 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:35,819 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:35,819 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:35,819 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:35,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 09:28:35,820 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:35,820 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:35,821 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:35,821 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 09:28:35,889 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:35,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 629 places, 671 transitions, 1594 flow [2023-09-01 09:28:36,149 INFO L130 PetriNetUnfolder]: 85/837 cut-off events. [2023-09-01 09:28:36,149 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:28:36,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 837 events. 85/837 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 3345 event pairs, 0 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 898. Up to 30 conditions per place. [2023-09-01 09:28:36,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 629 places, 671 transitions, 1594 flow [2023-09-01 09:28:36,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 629 places, 671 transitions, 1594 flow [2023-09-01 09:28:36,171 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:36,171 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 629 places, 671 transitions, 1594 flow [2023-09-01 09:28:36,171 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 629 places, 671 transitions, 1594 flow [2023-09-01 09:28:36,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 629 places, 671 transitions, 1594 flow [2023-09-01 09:28:36,425 INFO L130 PetriNetUnfolder]: 85/837 cut-off events. [2023-09-01 09:28:36,426 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:28:36,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 837 events. 85/837 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 3345 event pairs, 0 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 898. Up to 30 conditions per place. [2023-09-01 09:28:36,547 INFO L119 LiptonReduction]: Number of co-enabled transitions 393120 [2023-09-01 09:28:41,273 INFO L134 LiptonReduction]: Checked pairs total: 1073781 [2023-09-01 09:28:41,273 INFO L136 LiptonReduction]: Total number of compositions: 495 [2023-09-01 09:28:41,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:41,274 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:41,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:41,311 INFO L130 PetriNetUnfolder]: 30/339 cut-off events. [2023-09-01 09:28:41,311 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:28:41,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:41,312 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:41,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:41,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1941038892, now seen corresponding path program 1 times [2023-09-01 09:28:41,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:41,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113462260] [2023-09-01 09:28:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:41,334 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:41,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:41,356 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:41,356 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 09:28:41,356 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:41,357 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:41,357 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:41,357 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 09:28:41,426 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:41,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 717 transitions, 1719 flow [2023-09-01 09:28:41,724 INFO L130 PetriNetUnfolder]: 91/895 cut-off events. [2023-09-01 09:28:41,724 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:28:41,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 895 events. 91/895 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 3599 event pairs, 0 based on Foata normal form. 0/773 useless extension candidates. Maximal degree in co-relation 973. Up to 32 conditions per place. [2023-09-01 09:28:41,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 672 places, 717 transitions, 1719 flow [2023-09-01 09:28:41,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 672 places, 717 transitions, 1719 flow [2023-09-01 09:28:41,769 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:41,769 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 672 places, 717 transitions, 1719 flow [2023-09-01 09:28:41,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 672 places, 717 transitions, 1719 flow [2023-09-01 09:28:41,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 672 places, 717 transitions, 1719 flow [2023-09-01 09:28:42,079 INFO L130 PetriNetUnfolder]: 91/895 cut-off events. [2023-09-01 09:28:42,079 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:28:42,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 895 events. 91/895 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 3599 event pairs, 0 based on Foata normal form. 0/773 useless extension candidates. Maximal degree in co-relation 973. Up to 32 conditions per place. [2023-09-01 09:28:42,172 INFO L119 LiptonReduction]: Number of co-enabled transitions 452250 [2023-09-01 09:28:46,890 INFO L134 LiptonReduction]: Checked pairs total: 1237808 [2023-09-01 09:28:46,890 INFO L136 LiptonReduction]: Total number of compositions: 532 [2023-09-01 09:28:46,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:46,892 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:46,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:46,984 INFO L130 PetriNetUnfolder]: 30/360 cut-off events. [2023-09-01 09:28:46,984 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:28:46,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:46,984 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:46,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:46,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:46,985 INFO L85 PathProgramCache]: Analyzing trace with hash -49390429, now seen corresponding path program 1 times [2023-09-01 09:28:46,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:46,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822980082] [2023-09-01 09:28:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:46,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:47,008 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:47,038 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:47,038 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:47,039 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:47,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 09:28:47,039 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:47,039 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:47,040 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:47,040 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 09:28:47,115 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:47,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 715 places, 763 transitions, 1846 flow [2023-09-01 09:28:47,361 INFO L130 PetriNetUnfolder]: 97/953 cut-off events. [2023-09-01 09:28:47,361 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:28:47,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 953 events. 97/953 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 3856 event pairs, 0 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 1049. Up to 34 conditions per place. [2023-09-01 09:28:47,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 715 places, 763 transitions, 1846 flow [2023-09-01 09:28:47,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 715 places, 763 transitions, 1846 flow [2023-09-01 09:28:47,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:47,397 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 715 places, 763 transitions, 1846 flow [2023-09-01 09:28:47,398 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 715 places, 763 transitions, 1846 flow [2023-09-01 09:28:47,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 715 places, 763 transitions, 1846 flow [2023-09-01 09:28:47,719 INFO L130 PetriNetUnfolder]: 97/953 cut-off events. [2023-09-01 09:28:47,719 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:28:47,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 953 events. 97/953 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 3856 event pairs, 0 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 1049. Up to 34 conditions per place. [2023-09-01 09:28:47,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 515520 [2023-09-01 09:28:52,877 INFO L134 LiptonReduction]: Checked pairs total: 1414510 [2023-09-01 09:28:52,877 INFO L136 LiptonReduction]: Total number of compositions: 555 [2023-09-01 09:28:52,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:52,879 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:52,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:52,934 INFO L130 PetriNetUnfolder]: 32/387 cut-off events. [2023-09-01 09:28:52,934 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:28:52,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:52,935 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:52,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:52,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:52,935 INFO L85 PathProgramCache]: Analyzing trace with hash 246924338, now seen corresponding path program 1 times [2023-09-01 09:28:52,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:52,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668250] [2023-09-01 09:28:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:52,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:52,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:52,983 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:52,984 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:52,984 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:52,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 09:28:52,984 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:52,985 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:52,985 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:52,985 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 09:28:53,067 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:53,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 758 places, 809 transitions, 1975 flow [2023-09-01 09:28:53,438 INFO L130 PetriNetUnfolder]: 103/1011 cut-off events. [2023-09-01 09:28:53,438 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:28:53,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1216 conditions, 1011 events. 103/1011 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4075 event pairs, 0 based on Foata normal form. 0/873 useless extension candidates. Maximal degree in co-relation 1126. Up to 36 conditions per place. [2023-09-01 09:28:53,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 758 places, 809 transitions, 1975 flow [2023-09-01 09:28:53,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 758 places, 809 transitions, 1975 flow [2023-09-01 09:28:53,499 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:53,499 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 758 places, 809 transitions, 1975 flow [2023-09-01 09:28:53,499 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 758 places, 809 transitions, 1975 flow [2023-09-01 09:28:53,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 758 places, 809 transitions, 1975 flow [2023-09-01 09:28:53,804 INFO L130 PetriNetUnfolder]: 103/1011 cut-off events. [2023-09-01 09:28:53,804 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:28:53,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1216 conditions, 1011 events. 103/1011 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4075 event pairs, 0 based on Foata normal form. 0/873 useless extension candidates. Maximal degree in co-relation 1126. Up to 36 conditions per place. [2023-09-01 09:28:53,919 INFO L119 LiptonReduction]: Number of co-enabled transitions 582930 [2023-09-01 09:28:59,345 INFO L134 LiptonReduction]: Checked pairs total: 1622641 [2023-09-01 09:28:59,346 INFO L136 LiptonReduction]: Total number of compositions: 587 [2023-09-01 09:28:59,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:59,347 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:59,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:59,404 INFO L130 PetriNetUnfolder]: 38/418 cut-off events. [2023-09-01 09:28:59,404 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:28:59,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:59,404 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:59,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:59,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash 123352013, now seen corresponding path program 1 times [2023-09-01 09:28:59,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:59,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881601252] [2023-09-01 09:28:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:59,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:59,428 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:59,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:59,455 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:59,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:59,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 09:28:59,455 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:59,456 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:59,456 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:59,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 09:28:59,530 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:59,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 801 places, 855 transitions, 2106 flow [2023-09-01 09:28:59,836 INFO L130 PetriNetUnfolder]: 109/1069 cut-off events. [2023-09-01 09:28:59,837 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:28:59,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 1069 events. 109/1069 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4364 event pairs, 0 based on Foata normal form. 0/923 useless extension candidates. Maximal degree in co-relation 1204. Up to 38 conditions per place. [2023-09-01 09:28:59,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 801 places, 855 transitions, 2106 flow [2023-09-01 09:28:59,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 801 places, 855 transitions, 2106 flow [2023-09-01 09:28:59,886 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:59,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 801 places, 855 transitions, 2106 flow [2023-09-01 09:28:59,887 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 801 places, 855 transitions, 2106 flow [2023-09-01 09:28:59,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 801 places, 855 transitions, 2106 flow [2023-09-01 09:29:00,264 INFO L130 PetriNetUnfolder]: 109/1069 cut-off events. [2023-09-01 09:29:00,264 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:29:00,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 1069 events. 109/1069 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4364 event pairs, 0 based on Foata normal form. 0/923 useless extension candidates. Maximal degree in co-relation 1204. Up to 38 conditions per place. [2023-09-01 09:29:00,412 INFO L119 LiptonReduction]: Number of co-enabled transitions 654480 [2023-09-01 09:29:05,989 INFO L134 LiptonReduction]: Checked pairs total: 1785816 [2023-09-01 09:29:05,989 INFO L136 LiptonReduction]: Total number of compositions: 616 [2023-09-01 09:29:05,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:05,991 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:05,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:06,079 INFO L130 PetriNetUnfolder]: 36/436 cut-off events. [2023-09-01 09:29:06,079 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:29:06,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:06,079 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:29:06,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:06,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:06,080 INFO L85 PathProgramCache]: Analyzing trace with hash -532437852, now seen corresponding path program 1 times [2023-09-01 09:29:06,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:06,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296288040] [2023-09-01 09:29:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:06,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:06,138 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:06,139 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:06,139 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 09:29:06,139 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:06,140 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:06,140 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:06,140 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 09:29:06,235 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:06,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 844 places, 901 transitions, 2239 flow [2023-09-01 09:29:06,575 INFO L130 PetriNetUnfolder]: 115/1127 cut-off events. [2023-09-01 09:29:06,575 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:29:06,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 1127 events. 115/1127 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4664 event pairs, 0 based on Foata normal form. 0/973 useless extension candidates. Maximal degree in co-relation 1283. Up to 40 conditions per place. [2023-09-01 09:29:06,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 844 places, 901 transitions, 2239 flow [2023-09-01 09:29:06,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 844 places, 901 transitions, 2239 flow [2023-09-01 09:29:06,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:06,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 844 places, 901 transitions, 2239 flow [2023-09-01 09:29:06,627 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 844 places, 901 transitions, 2239 flow [2023-09-01 09:29:06,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 844 places, 901 transitions, 2239 flow [2023-09-01 09:29:06,991 INFO L130 PetriNetUnfolder]: 115/1127 cut-off events. [2023-09-01 09:29:06,991 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:29:07,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 1127 events. 115/1127 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4664 event pairs, 0 based on Foata normal form. 0/973 useless extension candidates. Maximal degree in co-relation 1283. Up to 40 conditions per place. [2023-09-01 09:29:07,130 INFO L119 LiptonReduction]: Number of co-enabled transitions 730170 [2023-09-01 09:29:13,259 INFO L134 LiptonReduction]: Checked pairs total: 1993110 [2023-09-01 09:29:13,260 INFO L136 LiptonReduction]: Total number of compositions: 654 [2023-09-01 09:29:13,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:13,261 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:13,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:13,332 INFO L130 PetriNetUnfolder]: 39/464 cut-off events. [2023-09-01 09:29:13,333 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:29:13,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:13,333 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:29:13,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:13,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:13,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1785299360, now seen corresponding path program 1 times [2023-09-01 09:29:13,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:13,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995878045] [2023-09-01 09:29:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:13,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:13,372 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:13,429 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:13,430 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:13,430 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:13,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 09:29:13,430 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:13,432 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:13,432 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:13,432 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 09:29:13,515 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:13,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 887 places, 947 transitions, 2374 flow [2023-09-01 09:29:14,007 INFO L130 PetriNetUnfolder]: 121/1185 cut-off events. [2023-09-01 09:29:14,007 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:29:14,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 1185 events. 121/1185 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4909 event pairs, 0 based on Foata normal form. 0/1023 useless extension candidates. Maximal degree in co-relation 1363. Up to 42 conditions per place. [2023-09-01 09:29:14,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 887 places, 947 transitions, 2374 flow [2023-09-01 09:29:14,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 887 places, 947 transitions, 2374 flow [2023-09-01 09:29:14,071 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:14,071 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 887 places, 947 transitions, 2374 flow [2023-09-01 09:29:14,072 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 887 places, 947 transitions, 2374 flow [2023-09-01 09:29:14,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 887 places, 947 transitions, 2374 flow [2023-09-01 09:29:14,435 INFO L130 PetriNetUnfolder]: 121/1185 cut-off events. [2023-09-01 09:29:14,435 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:29:14,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 1185 events. 121/1185 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 4909 event pairs, 0 based on Foata normal form. 0/1023 useless extension candidates. Maximal degree in co-relation 1363. Up to 42 conditions per place. [2023-09-01 09:29:14,735 INFO L119 LiptonReduction]: Number of co-enabled transitions 810000 [2023-09-01 09:29:20,972 INFO L134 LiptonReduction]: Checked pairs total: 2205299 [2023-09-01 09:29:20,972 INFO L136 LiptonReduction]: Total number of compositions: 685 [2023-09-01 09:29:20,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:20,974 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:20,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:21,052 INFO L130 PetriNetUnfolder]: 39/485 cut-off events. [2023-09-01 09:29:21,052 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:29:21,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:21,053 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:29:21,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:21,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1983978963, now seen corresponding path program 1 times [2023-09-01 09:29:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:21,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383654173] [2023-09-01 09:29:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:21,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:21,082 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:21,129 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:21,130 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:21,130 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:21,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 09:29:21,130 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:21,131 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:21,131 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:21,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 09:29:21,217 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:21,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 930 places, 993 transitions, 2511 flow [2023-09-01 09:29:21,742 INFO L130 PetriNetUnfolder]: 127/1243 cut-off events. [2023-09-01 09:29:21,742 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:29:21,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 1243 events. 127/1243 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5168 event pairs, 0 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 1444. Up to 44 conditions per place. [2023-09-01 09:29:21,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 930 places, 993 transitions, 2511 flow [2023-09-01 09:29:21,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 930 places, 993 transitions, 2511 flow [2023-09-01 09:29:21,798 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:21,799 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 930 places, 993 transitions, 2511 flow [2023-09-01 09:29:21,799 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 930 places, 993 transitions, 2511 flow [2023-09-01 09:29:21,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 930 places, 993 transitions, 2511 flow [2023-09-01 09:29:22,242 INFO L130 PetriNetUnfolder]: 127/1243 cut-off events. [2023-09-01 09:29:22,242 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:29:22,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 1243 events. 127/1243 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5168 event pairs, 0 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 1444. Up to 44 conditions per place. [2023-09-01 09:29:22,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 893970 [2023-09-01 09:29:29,451 INFO L134 LiptonReduction]: Checked pairs total: 2452679 [2023-09-01 09:29:29,451 INFO L136 LiptonReduction]: Total number of compositions: 725 [2023-09-01 09:29:29,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:29,453 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:29,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:29,541 INFO L130 PetriNetUnfolder]: 44/515 cut-off events. [2023-09-01 09:29:29,541 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:29:29,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:29,541 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:29:29,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:29,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:29,542 INFO L85 PathProgramCache]: Analyzing trace with hash 539297314, now seen corresponding path program 1 times [2023-09-01 09:29:29,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:29,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95643239] [2023-09-01 09:29:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:29,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:29,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:29,608 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:29,608 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:29,608 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:29,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 09:29:29,609 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:29,609 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:29,609 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:29,609 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 09:29:29,698 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:29,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 973 places, 1039 transitions, 2650 flow [2023-09-01 09:29:30,216 INFO L130 PetriNetUnfolder]: 133/1301 cut-off events. [2023-09-01 09:29:30,217 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:29:30,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 1301 events. 133/1301 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5444 event pairs, 0 based on Foata normal form. 0/1123 useless extension candidates. Maximal degree in co-relation 1526. Up to 46 conditions per place. [2023-09-01 09:29:30,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 973 places, 1039 transitions, 2650 flow [2023-09-01 09:29:30,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 973 places, 1039 transitions, 2650 flow [2023-09-01 09:29:30,292 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:30,292 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 973 places, 1039 transitions, 2650 flow [2023-09-01 09:29:30,293 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 973 places, 1039 transitions, 2650 flow [2023-09-01 09:29:30,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 973 places, 1039 transitions, 2650 flow [2023-09-01 09:29:30,775 INFO L130 PetriNetUnfolder]: 133/1301 cut-off events. [2023-09-01 09:29:30,775 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:29:30,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 1301 events. 133/1301 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5444 event pairs, 0 based on Foata normal form. 0/1123 useless extension candidates. Maximal degree in co-relation 1526. Up to 46 conditions per place. [2023-09-01 09:29:30,969 INFO L119 LiptonReduction]: Number of co-enabled transitions 982080 [2023-09-01 09:29:38,168 INFO L134 LiptonReduction]: Checked pairs total: 2707133 [2023-09-01 09:29:38,168 INFO L136 LiptonReduction]: Total number of compositions: 765 [2023-09-01 09:29:38,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:38,170 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:38,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:38,270 INFO L130 PetriNetUnfolder]: 44/536 cut-off events. [2023-09-01 09:29:38,270 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:29:38,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:38,271 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:29:38,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:38,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:38,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1747739106, now seen corresponding path program 1 times [2023-09-01 09:29:38,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:38,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234533451] [2023-09-01 09:29:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:38,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:38,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:38,422 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:38,422 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:38,422 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:38,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 09:29:38,423 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:38,423 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:38,423 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:38,423 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 09:29:38,527 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:38,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1016 places, 1085 transitions, 2791 flow [2023-09-01 09:29:39,071 INFO L130 PetriNetUnfolder]: 139/1359 cut-off events. [2023-09-01 09:29:39,071 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:29:39,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 1359 events. 139/1359 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5692 event pairs, 0 based on Foata normal form. 0/1173 useless extension candidates. Maximal degree in co-relation 1609. Up to 48 conditions per place. [2023-09-01 09:29:39,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 1016 places, 1085 transitions, 2791 flow [2023-09-01 09:29:39,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1016 places, 1085 transitions, 2791 flow [2023-09-01 09:29:39,148 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:39,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1016 places, 1085 transitions, 2791 flow [2023-09-01 09:29:39,148 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1016 places, 1085 transitions, 2791 flow [2023-09-01 09:29:39,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1016 places, 1085 transitions, 2791 flow [2023-09-01 09:29:39,663 INFO L130 PetriNetUnfolder]: 139/1359 cut-off events. [2023-09-01 09:29:39,663 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:29:39,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 1359 events. 139/1359 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5692 event pairs, 0 based on Foata normal form. 0/1173 useless extension candidates. Maximal degree in co-relation 1609. Up to 48 conditions per place. [2023-09-01 09:29:39,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 1074330 [2023-09-01 09:29:47,895 INFO L134 LiptonReduction]: Checked pairs total: 2900024 [2023-09-01 09:29:47,895 INFO L136 LiptonReduction]: Total number of compositions: 781 [2023-09-01 09:29:47,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:47,897 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:47,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:48,043 INFO L130 PetriNetUnfolder]: 48/564 cut-off events. [2023-09-01 09:29:48,043 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:29:48,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:48,043 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:29:48,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:48,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:48,044 INFO L85 PathProgramCache]: Analyzing trace with hash 12654648, now seen corresponding path program 1 times [2023-09-01 09:29:48,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:48,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870817579] [2023-09-01 09:29:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:48,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:48,078 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:48,123 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:48,123 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:48,123 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:48,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 09:29:48,124 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:48,124 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:48,124 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:48,124 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 09:29:48,220 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:48,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1059 places, 1131 transitions, 2934 flow [2023-09-01 09:29:48,813 INFO L130 PetriNetUnfolder]: 145/1417 cut-off events. [2023-09-01 09:29:48,813 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:29:48,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1790 conditions, 1417 events. 145/1417 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5924 event pairs, 0 based on Foata normal form. 0/1223 useless extension candidates. Maximal degree in co-relation 1693. Up to 50 conditions per place. [2023-09-01 09:29:48,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 1059 places, 1131 transitions, 2934 flow [2023-09-01 09:29:48,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1059 places, 1131 transitions, 2934 flow [2023-09-01 09:29:48,904 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:48,905 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1059 places, 1131 transitions, 2934 flow [2023-09-01 09:29:48,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1059 places, 1131 transitions, 2934 flow [2023-09-01 09:29:48,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1059 places, 1131 transitions, 2934 flow [2023-09-01 09:29:49,461 INFO L130 PetriNetUnfolder]: 145/1417 cut-off events. [2023-09-01 09:29:49,461 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:29:49,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1790 conditions, 1417 events. 145/1417 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5924 event pairs, 0 based on Foata normal form. 0/1223 useless extension candidates. Maximal degree in co-relation 1693. Up to 50 conditions per place. [2023-09-01 09:29:49,706 INFO L119 LiptonReduction]: Number of co-enabled transitions 1170720 [2023-09-01 09:29:57,573 INFO L134 LiptonReduction]: Checked pairs total: 3302306 [2023-09-01 09:29:57,574 INFO L136 LiptonReduction]: Total number of compositions: 832 [2023-09-01 09:29:57,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:29:57,575 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:29:57,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:29:57,692 INFO L130 PetriNetUnfolder]: 54/599 cut-off events. [2023-09-01 09:29:57,692 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:29:57,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:29:57,693 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:29:57,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:29:57,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:29:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash 46027648, now seen corresponding path program 1 times [2023-09-01 09:29:57,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:29:57,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315102859] [2023-09-01 09:29:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:29:57,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:29:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:57,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:29:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:29:57,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:29:57,774 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:29:57,775 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:29:57,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 09:29:57,775 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:29:57,775 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:29:57,775 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:29:57,776 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 09:29:57,878 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:29:57,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1102 places, 1177 transitions, 3079 flow [2023-09-01 09:29:58,608 INFO L130 PetriNetUnfolder]: 151/1475 cut-off events. [2023-09-01 09:29:58,608 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:29:58,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 1475 events. 151/1475 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6215 event pairs, 0 based on Foata normal form. 0/1273 useless extension candidates. Maximal degree in co-relation 1778. Up to 52 conditions per place. [2023-09-01 09:29:58,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 1102 places, 1177 transitions, 3079 flow [2023-09-01 09:29:58,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1102 places, 1177 transitions, 3079 flow [2023-09-01 09:29:58,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:58,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1102 places, 1177 transitions, 3079 flow [2023-09-01 09:29:58,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1102 places, 1177 transitions, 3079 flow [2023-09-01 09:29:58,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1102 places, 1177 transitions, 3079 flow [2023-09-01 09:29:59,275 INFO L130 PetriNetUnfolder]: 151/1475 cut-off events. [2023-09-01 09:29:59,275 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:29:59,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 1475 events. 151/1475 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6215 event pairs, 0 based on Foata normal form. 0/1273 useless extension candidates. Maximal degree in co-relation 1778. Up to 52 conditions per place. [2023-09-01 09:29:59,639 INFO L119 LiptonReduction]: Number of co-enabled transitions 1271250 [2023-09-01 09:30:08,120 INFO L134 LiptonReduction]: Checked pairs total: 3521904 [2023-09-01 09:30:08,120 INFO L136 LiptonReduction]: Total number of compositions: 857 [2023-09-01 09:30:08,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:30:08,122 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:30:08,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:30:08,272 INFO L130 PetriNetUnfolder]: 53/617 cut-off events. [2023-09-01 09:30:08,272 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:30:08,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:30:08,272 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:30:08,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:30:08,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:30:08,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1989775499, now seen corresponding path program 1 times [2023-09-01 09:30:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:30:08,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040753347] [2023-09-01 09:30:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:30:08,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:30:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:08,312 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:30:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:08,359 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:30:08,359 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:30:08,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:30:08,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 09:30:08,360 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:30:08,360 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:30:08,360 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:30:08,360 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 09:30:08,466 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:30:08,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1145 places, 1223 transitions, 3226 flow [2023-09-01 09:30:09,115 INFO L130 PetriNetUnfolder]: 157/1533 cut-off events. [2023-09-01 09:30:09,116 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:30:09,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 1533 events. 157/1533 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6459 event pairs, 0 based on Foata normal form. 0/1323 useless extension candidates. Maximal degree in co-relation 1864. Up to 54 conditions per place. [2023-09-01 09:30:09,196 INFO L82 GeneralOperation]: Start removeDead. Operand has 1145 places, 1223 transitions, 3226 flow [2023-09-01 09:30:09,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1145 places, 1223 transitions, 3226 flow [2023-09-01 09:30:09,221 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:30:09,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1145 places, 1223 transitions, 3226 flow [2023-09-01 09:30:09,222 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1145 places, 1223 transitions, 3226 flow [2023-09-01 09:30:09,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1145 places, 1223 transitions, 3226 flow [2023-09-01 09:30:09,842 INFO L130 PetriNetUnfolder]: 157/1533 cut-off events. [2023-09-01 09:30:09,842 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:30:09,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 1533 events. 157/1533 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6459 event pairs, 0 based on Foata normal form. 0/1323 useless extension candidates. Maximal degree in co-relation 1864. Up to 54 conditions per place. [2023-09-01 09:30:10,268 INFO L119 LiptonReduction]: Number of co-enabled transitions 1375920 [2023-09-01 09:30:18,993 INFO L134 LiptonReduction]: Checked pairs total: 3877657 [2023-09-01 09:30:18,993 INFO L136 LiptonReduction]: Total number of compositions: 905 [2023-09-01 09:30:18,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:30:18,995 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:30:18,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:30:19,136 INFO L130 PetriNetUnfolder]: 61/653 cut-off events. [2023-09-01 09:30:19,136 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:30:19,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:30:19,136 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:30:19,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:30:19,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:30:19,137 INFO L85 PathProgramCache]: Analyzing trace with hash 314528974, now seen corresponding path program 1 times [2023-09-01 09:30:19,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:30:19,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983371933] [2023-09-01 09:30:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:30:19,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:30:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:19,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:30:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:19,223 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:30:19,223 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:30:19,224 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:30:19,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 09:30:19,224 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:30:19,224 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:30:19,224 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:30:19,225 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-09-01 09:30:19,332 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:30:19,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1188 places, 1269 transitions, 3375 flow [2023-09-01 09:30:20,263 INFO L130 PetriNetUnfolder]: 163/1591 cut-off events. [2023-09-01 09:30:20,263 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:30:20,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 1591 events. 163/1591 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6713 event pairs, 0 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 1951. Up to 56 conditions per place. [2023-09-01 09:30:20,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 1188 places, 1269 transitions, 3375 flow [2023-09-01 09:30:20,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1188 places, 1269 transitions, 3375 flow [2023-09-01 09:30:20,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:30:20,332 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1188 places, 1269 transitions, 3375 flow [2023-09-01 09:30:20,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1188 places, 1269 transitions, 3375 flow [2023-09-01 09:30:20,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1188 places, 1269 transitions, 3375 flow [2023-09-01 09:30:21,034 INFO L130 PetriNetUnfolder]: 163/1591 cut-off events. [2023-09-01 09:30:21,034 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:30:21,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 1591 events. 163/1591 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6713 event pairs, 0 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 1951. Up to 56 conditions per place. [2023-09-01 09:30:21,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 1484730 [2023-09-01 09:30:30,567 INFO L134 LiptonReduction]: Checked pairs total: 4170777 [2023-09-01 09:30:30,567 INFO L136 LiptonReduction]: Total number of compositions: 933 [2023-09-01 09:30:30,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:30:30,569 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:30:30,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:30:30,714 INFO L130 PetriNetUnfolder]: 62/677 cut-off events. [2023-09-01 09:30:30,714 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:30:30,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:30:30,714 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:30:30,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:30:30,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:30:30,715 INFO L85 PathProgramCache]: Analyzing trace with hash 246226082, now seen corresponding path program 1 times [2023-09-01 09:30:30,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:30:30,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046279841] [2023-09-01 09:30:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:30:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:30:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:30,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:30:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:30,802 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:30:30,803 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:30:30,803 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:30:30,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 09:30:30,803 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:30:30,804 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:30:30,804 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:30:30,804 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-09-01 09:30:30,931 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:30:30,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1231 places, 1315 transitions, 3526 flow [2023-09-01 09:30:31,719 INFO L130 PetriNetUnfolder]: 169/1649 cut-off events. [2023-09-01 09:30:31,720 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:30:31,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 1649 events. 169/1649 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6953 event pairs, 0 based on Foata normal form. 0/1423 useless extension candidates. Maximal degree in co-relation 2039. Up to 58 conditions per place. [2023-09-01 09:30:31,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 1231 places, 1315 transitions, 3526 flow [2023-09-01 09:30:31,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1231 places, 1315 transitions, 3526 flow [2023-09-01 09:30:31,848 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:30:31,848 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1231 places, 1315 transitions, 3526 flow [2023-09-01 09:30:31,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1231 places, 1315 transitions, 3526 flow [2023-09-01 09:30:31,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1231 places, 1315 transitions, 3526 flow [2023-09-01 09:30:32,637 INFO L130 PetriNetUnfolder]: 169/1649 cut-off events. [2023-09-01 09:30:32,637 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:30:32,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 1649 events. 169/1649 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6953 event pairs, 0 based on Foata normal form. 0/1423 useless extension candidates. Maximal degree in co-relation 2039. Up to 58 conditions per place. [2023-09-01 09:30:32,973 INFO L119 LiptonReduction]: Number of co-enabled transitions 1597680 [2023-09-01 09:30:42,869 INFO L134 LiptonReduction]: Checked pairs total: 4415232 [2023-09-01 09:30:42,869 INFO L136 LiptonReduction]: Total number of compositions: 958 [2023-09-01 09:30:42,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:30:42,871 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:30:42,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:30:43,029 INFO L130 PetriNetUnfolder]: 63/699 cut-off events. [2023-09-01 09:30:43,030 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:30:43,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:30:43,030 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:30:43,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:30:43,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:30:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash 491797925, now seen corresponding path program 1 times [2023-09-01 09:30:43,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:30:43,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602452184] [2023-09-01 09:30:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:30:43,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:30:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:43,071 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:30:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:43,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:30:43,124 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:30:43,124 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:30:43,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 09:30:43,125 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:30:43,125 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:30:43,125 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:30:43,125 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-09-01 09:30:43,249 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:30:43,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1274 places, 1361 transitions, 3679 flow [2023-09-01 09:30:44,183 INFO L130 PetriNetUnfolder]: 175/1707 cut-off events. [2023-09-01 09:30:44,184 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:30:44,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2230 conditions, 1707 events. 175/1707 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7227 event pairs, 0 based on Foata normal form. 0/1473 useless extension candidates. Maximal degree in co-relation 2128. Up to 60 conditions per place. [2023-09-01 09:30:44,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 1274 places, 1361 transitions, 3679 flow [2023-09-01 09:30:44,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1274 places, 1361 transitions, 3679 flow [2023-09-01 09:30:44,289 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:30:44,289 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1274 places, 1361 transitions, 3679 flow [2023-09-01 09:30:44,289 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1274 places, 1361 transitions, 3679 flow [2023-09-01 09:30:44,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1274 places, 1361 transitions, 3679 flow [2023-09-01 09:30:45,064 INFO L130 PetriNetUnfolder]: 175/1707 cut-off events. [2023-09-01 09:30:45,065 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:30:45,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2230 conditions, 1707 events. 175/1707 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7227 event pairs, 0 based on Foata normal form. 0/1473 useless extension candidates. Maximal degree in co-relation 2128. Up to 60 conditions per place. [2023-09-01 09:30:45,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 1714770 [2023-09-01 09:30:55,912 INFO L134 LiptonReduction]: Checked pairs total: 4746806 [2023-09-01 09:30:55,913 INFO L136 LiptonReduction]: Total number of compositions: 995 [2023-09-01 09:30:55,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:30:55,914 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:30:55,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:30:56,086 INFO L130 PetriNetUnfolder]: 66/726 cut-off events. [2023-09-01 09:30:56,086 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:30:56,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:30:56,087 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:30:56,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:30:56,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:30:56,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1702613276, now seen corresponding path program 1 times [2023-09-01 09:30:56,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:30:56,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617255086] [2023-09-01 09:30:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:30:56,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:30:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:56,126 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:30:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:30:56,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:30:56,187 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:30:56,187 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:30:56,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-09-01 09:30:56,188 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:30:56,188 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:30:56,188 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:30:56,188 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-09-01 09:30:56,308 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:30:56,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1317 places, 1407 transitions, 3834 flow [2023-09-01 09:30:57,200 INFO L130 PetriNetUnfolder]: 181/1765 cut-off events. [2023-09-01 09:30:57,200 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 09:30:57,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2321 conditions, 1765 events. 181/1765 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7484 event pairs, 0 based on Foata normal form. 0/1523 useless extension candidates. Maximal degree in co-relation 2218. Up to 62 conditions per place. [2023-09-01 09:30:57,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 1317 places, 1407 transitions, 3834 flow [2023-09-01 09:30:57,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1317 places, 1407 transitions, 3834 flow [2023-09-01 09:30:57,356 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:30:57,356 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1317 places, 1407 transitions, 3834 flow [2023-09-01 09:30:57,356 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1317 places, 1407 transitions, 3834 flow [2023-09-01 09:30:57,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1317 places, 1407 transitions, 3834 flow [2023-09-01 09:30:58,258 INFO L130 PetriNetUnfolder]: 181/1765 cut-off events. [2023-09-01 09:30:58,258 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 09:30:58,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2321 conditions, 1765 events. 181/1765 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7484 event pairs, 0 based on Foata normal form. 0/1523 useless extension candidates. Maximal degree in co-relation 2218. Up to 62 conditions per place. [2023-09-01 09:30:58,701 INFO L119 LiptonReduction]: Number of co-enabled transitions 1836000 [2023-09-01 09:31:09,174 INFO L134 LiptonReduction]: Checked pairs total: 5099289 [2023-09-01 09:31:09,174 INFO L136 LiptonReduction]: Total number of compositions: 1038 [2023-09-01 09:31:09,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:31:09,176 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:31:09,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:31:09,351 INFO L130 PetriNetUnfolder]: 65/744 cut-off events. [2023-09-01 09:31:09,352 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-09-01 09:31:09,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:31:09,352 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:31:09,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:31:09,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:31:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -279460553, now seen corresponding path program 1 times [2023-09-01 09:31:09,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:31:09,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027049618] [2023-09-01 09:31:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:31:09,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:31:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:09,414 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:31:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:09,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:31:09,484 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:31:09,484 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:31:09,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-09-01 09:31:09,484 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:31:09,484 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:31:09,485 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:31:09,485 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-09-01 09:31:09,617 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:31:09,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1360 places, 1453 transitions, 3991 flow [2023-09-01 09:31:10,582 INFO L130 PetriNetUnfolder]: 187/1823 cut-off events. [2023-09-01 09:31:10,582 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 09:31:10,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 1823 events. 187/1823 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7721 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 2309. Up to 64 conditions per place. [2023-09-01 09:31:10,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 1360 places, 1453 transitions, 3991 flow [2023-09-01 09:31:10,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1360 places, 1453 transitions, 3991 flow [2023-09-01 09:31:10,725 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:31:10,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1360 places, 1453 transitions, 3991 flow [2023-09-01 09:31:10,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1360 places, 1453 transitions, 3991 flow [2023-09-01 09:31:10,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1360 places, 1453 transitions, 3991 flow [2023-09-01 09:31:11,624 INFO L130 PetriNetUnfolder]: 187/1823 cut-off events. [2023-09-01 09:31:11,624 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 09:31:11,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 1823 events. 187/1823 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7721 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 2309. Up to 64 conditions per place. [2023-09-01 09:31:12,312 INFO L119 LiptonReduction]: Number of co-enabled transitions 1961370 [2023-09-01 09:31:23,087 INFO L134 LiptonReduction]: Checked pairs total: 5323805 [2023-09-01 09:31:23,088 INFO L136 LiptonReduction]: Total number of compositions: 1048 [2023-09-01 09:31:23,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:31:23,089 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:31:23,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:31:23,271 INFO L130 PetriNetUnfolder]: 66/769 cut-off events. [2023-09-01 09:31:23,271 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-09-01 09:31:23,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:31:23,271 INFO L208 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:31:23,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:31:23,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:31:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1283237776, now seen corresponding path program 1 times [2023-09-01 09:31:23,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:31:23,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068885704] [2023-09-01 09:31:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:31:23,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:31:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:23,334 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:31:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:23,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:31:23,404 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:31:23,404 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:31:23,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-09-01 09:31:23,405 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:31:23,405 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:31:23,405 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:31:23,405 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-09-01 09:31:23,539 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:31:23,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1403 places, 1499 transitions, 4150 flow [2023-09-01 09:31:24,591 INFO L130 PetriNetUnfolder]: 193/1881 cut-off events. [2023-09-01 09:31:24,591 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 09:31:24,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2506 conditions, 1881 events. 193/1881 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7985 event pairs, 0 based on Foata normal form. 0/1623 useless extension candidates. Maximal degree in co-relation 2401. Up to 66 conditions per place. [2023-09-01 09:31:24,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 1403 places, 1499 transitions, 4150 flow [2023-09-01 09:31:24,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1403 places, 1499 transitions, 4150 flow [2023-09-01 09:31:24,711 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:31:24,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1403 places, 1499 transitions, 4150 flow [2023-09-01 09:31:24,711 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1403 places, 1499 transitions, 4150 flow [2023-09-01 09:31:24,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1403 places, 1499 transitions, 4150 flow [2023-09-01 09:31:25,723 INFO L130 PetriNetUnfolder]: 193/1881 cut-off events. [2023-09-01 09:31:25,724 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 09:31:25,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2506 conditions, 1881 events. 193/1881 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7985 event pairs, 0 based on Foata normal form. 0/1623 useless extension candidates. Maximal degree in co-relation 2401. Up to 66 conditions per place. [2023-09-01 09:31:26,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 2090880 [2023-09-01 09:31:37,976 INFO L134 LiptonReduction]: Checked pairs total: 5815606 [2023-09-01 09:31:37,976 INFO L136 LiptonReduction]: Total number of compositions: 1082 [2023-09-01 09:31:37,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:31:37,978 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:31:37,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:31:38,174 INFO L130 PetriNetUnfolder]: 73/804 cut-off events. [2023-09-01 09:31:38,174 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-09-01 09:31:38,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:31:38,174 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:31:38,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:31:38,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:31:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash 840405020, now seen corresponding path program 1 times [2023-09-01 09:31:38,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:31:38,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763882812] [2023-09-01 09:31:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:31:38,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:31:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:38,219 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:31:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:38,269 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:31:38,269 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:31:38,270 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:31:38,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-09-01 09:31:38,270 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:31:38,270 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:31:38,271 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:31:38,271 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-09-01 09:31:38,398 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:31:38,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1446 places, 1545 transitions, 4311 flow [2023-09-01 09:31:39,571 INFO L130 PetriNetUnfolder]: 199/1939 cut-off events. [2023-09-01 09:31:39,571 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 09:31:39,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2600 conditions, 1939 events. 199/1939 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 8227 event pairs, 0 based on Foata normal form. 0/1673 useless extension candidates. Maximal degree in co-relation 2494. Up to 68 conditions per place. [2023-09-01 09:31:39,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 1446 places, 1545 transitions, 4311 flow [2023-09-01 09:31:39,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1446 places, 1545 transitions, 4311 flow [2023-09-01 09:31:39,689 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:31:39,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1446 places, 1545 transitions, 4311 flow [2023-09-01 09:31:39,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1446 places, 1545 transitions, 4311 flow [2023-09-01 09:31:39,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1446 places, 1545 transitions, 4311 flow [2023-09-01 09:31:40,701 INFO L130 PetriNetUnfolder]: 199/1939 cut-off events. [2023-09-01 09:31:40,701 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 09:31:40,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2600 conditions, 1939 events. 199/1939 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 8227 event pairs, 0 based on Foata normal form. 0/1673 useless extension candidates. Maximal degree in co-relation 2494. Up to 68 conditions per place. [2023-09-01 09:31:41,555 INFO L119 LiptonReduction]: Number of co-enabled transitions 2224530 [2023-09-01 09:31:53,282 INFO L134 LiptonReduction]: Checked pairs total: 6202397 [2023-09-01 09:31:53,282 INFO L136 LiptonReduction]: Total number of compositions: 1129 [2023-09-01 09:31:53,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:31:53,284 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:31:53,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:31:53,485 INFO L130 PetriNetUnfolder]: 74/826 cut-off events. [2023-09-01 09:31:53,486 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-09-01 09:31:53,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:31:53,486 INFO L208 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:31:53,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:31:53,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:31:53,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2028726009, now seen corresponding path program 1 times [2023-09-01 09:31:53,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:31:53,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122778638] [2023-09-01 09:31:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:31:53,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:31:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:53,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:31:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:31:53,601 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:31:53,602 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:31:53,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:31:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-09-01 09:31:53,602 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:31:53,603 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:31:53,603 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:31:53,603 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-09-01 09:31:53,779 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:31:53,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1489 places, 1591 transitions, 4474 flow [2023-09-01 09:31:54,883 INFO L130 PetriNetUnfolder]: 205/1997 cut-off events. [2023-09-01 09:31:54,883 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 09:31:55,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 1997 events. 205/1997 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 8512 event pairs, 0 based on Foata normal form. 0/1723 useless extension candidates. Maximal degree in co-relation 2588. Up to 70 conditions per place. [2023-09-01 09:31:55,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 1489 places, 1591 transitions, 4474 flow [2023-09-01 09:31:55,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1489 places, 1591 transitions, 4474 flow [2023-09-01 09:31:55,072 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:31:55,072 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1489 places, 1591 transitions, 4474 flow [2023-09-01 09:31:55,072 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1489 places, 1591 transitions, 4474 flow [2023-09-01 09:31:55,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1489 places, 1591 transitions, 4474 flow [2023-09-01 09:31:56,226 INFO L130 PetriNetUnfolder]: 205/1997 cut-off events. [2023-09-01 09:31:56,226 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 09:31:56,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 1997 events. 205/1997 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 8512 event pairs, 0 based on Foata normal form. 0/1723 useless extension candidates. Maximal degree in co-relation 2588. Up to 70 conditions per place. [2023-09-01 09:31:56,793 INFO L119 LiptonReduction]: Number of co-enabled transitions 2362320 [2023-09-01 09:32:08,808 INFO L134 LiptonReduction]: Checked pairs total: 6512794 [2023-09-01 09:32:08,809 INFO L136 LiptonReduction]: Total number of compositions: 1165 [2023-09-01 09:32:08,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:32:08,810 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:32:08,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:32:09,034 INFO L130 PetriNetUnfolder]: 76/852 cut-off events. [2023-09-01 09:32:09,034 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-09-01 09:32:09,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:32:09,034 INFO L208 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:32:09,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:32:09,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:32:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash 308116783, now seen corresponding path program 1 times [2023-09-01 09:32:09,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:32:09,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738984588] [2023-09-01 09:32:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:32:09,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:32:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:09,088 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:32:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:09,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:32:09,152 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:32:09,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:32:09,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-09-01 09:32:09,153 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:32:09,153 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:32:09,153 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:32:09,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-09-01 09:32:09,300 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:32:09,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1532 places, 1637 transitions, 4639 flow [2023-09-01 09:32:10,725 INFO L130 PetriNetUnfolder]: 211/2055 cut-off events. [2023-09-01 09:32:10,725 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 09:32:10,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 2055 events. 211/2055 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 8759 event pairs, 0 based on Foata normal form. 0/1773 useless extension candidates. Maximal degree in co-relation 2683. Up to 72 conditions per place. [2023-09-01 09:32:10,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 1532 places, 1637 transitions, 4639 flow [2023-09-01 09:32:10,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1532 places, 1637 transitions, 4639 flow [2023-09-01 09:32:10,848 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:32:10,848 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1532 places, 1637 transitions, 4639 flow [2023-09-01 09:32:10,848 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1532 places, 1637 transitions, 4639 flow [2023-09-01 09:32:10,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1532 places, 1637 transitions, 4639 flow [2023-09-01 09:32:12,094 INFO L130 PetriNetUnfolder]: 211/2055 cut-off events. [2023-09-01 09:32:12,094 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 09:32:12,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 2055 events. 211/2055 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 8759 event pairs, 0 based on Foata normal form. 0/1773 useless extension candidates. Maximal degree in co-relation 2683. Up to 72 conditions per place. [2023-09-01 09:32:12,856 INFO L119 LiptonReduction]: Number of co-enabled transitions 2504250 [2023-09-01 09:32:25,423 INFO L134 LiptonReduction]: Checked pairs total: 6904396 [2023-09-01 09:32:25,423 INFO L136 LiptonReduction]: Total number of compositions: 1188 [2023-09-01 09:32:25,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:32:25,425 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:32:25,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:32:25,653 INFO L130 PetriNetUnfolder]: 74/868 cut-off events. [2023-09-01 09:32:25,654 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-09-01 09:32:25,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:32:25,654 INFO L208 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:32:25,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:32:25,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:32:25,654 INFO L85 PathProgramCache]: Analyzing trace with hash -579765871, now seen corresponding path program 1 times [2023-09-01 09:32:25,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:32:25,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205930693] [2023-09-01 09:32:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:32:25,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:32:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:25,697 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:32:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:25,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:32:25,804 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:32:25,804 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:32:25,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-09-01 09:32:25,804 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:32:25,805 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:32:25,805 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:32:25,805 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-09-01 09:32:25,945 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:32:25,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1575 places, 1683 transitions, 4806 flow [2023-09-01 09:32:27,544 INFO L130 PetriNetUnfolder]: 217/2113 cut-off events. [2023-09-01 09:32:27,544 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 09:32:27,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 2113 events. 217/2113 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9022 event pairs, 0 based on Foata normal form. 0/1823 useless extension candidates. Maximal degree in co-relation 2779. Up to 74 conditions per place. [2023-09-01 09:32:27,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 1575 places, 1683 transitions, 4806 flow [2023-09-01 09:32:27,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1575 places, 1683 transitions, 4806 flow [2023-09-01 09:32:27,674 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:32:27,674 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1575 places, 1683 transitions, 4806 flow [2023-09-01 09:32:27,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1575 places, 1683 transitions, 4806 flow [2023-09-01 09:32:27,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1575 places, 1683 transitions, 4806 flow [2023-09-01 09:32:29,071 INFO L130 PetriNetUnfolder]: 217/2113 cut-off events. [2023-09-01 09:32:29,072 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 09:32:29,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 2113 events. 217/2113 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9022 event pairs, 0 based on Foata normal form. 0/1823 useless extension candidates. Maximal degree in co-relation 2779. Up to 74 conditions per place. [2023-09-01 09:32:29,742 INFO L119 LiptonReduction]: Number of co-enabled transitions 2650320 [2023-09-01 09:32:42,941 INFO L134 LiptonReduction]: Checked pairs total: 7318389 [2023-09-01 09:32:42,941 INFO L136 LiptonReduction]: Total number of compositions: 1229 [2023-09-01 09:32:42,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:32:42,943 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:32:42,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:32:43,257 INFO L130 PetriNetUnfolder]: 83/908 cut-off events. [2023-09-01 09:32:43,257 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-09-01 09:32:43,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:32:43,257 INFO L208 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:32:43,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:32:43,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:32:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash -139952723, now seen corresponding path program 1 times [2023-09-01 09:32:43,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:32:43,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829316988] [2023-09-01 09:32:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:32:43,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:32:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:43,303 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:32:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:32:43,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:32:43,366 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:32:43,366 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:32:43,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-09-01 09:32:43,366 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:32:43,367 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:32:43,367 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:32:43,367 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-09-01 09:32:43,512 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:32:43,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1618 places, 1729 transitions, 4975 flow [2023-09-01 09:32:45,028 INFO L130 PetriNetUnfolder]: 223/2171 cut-off events. [2023-09-01 09:32:45,028 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-09-01 09:32:45,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2986 conditions, 2171 events. 223/2171 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9128 event pairs, 0 based on Foata normal form. 0/1873 useless extension candidates. Maximal degree in co-relation 2876. Up to 76 conditions per place. [2023-09-01 09:32:45,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 1618 places, 1729 transitions, 4975 flow [2023-09-01 09:32:45,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1618 places, 1729 transitions, 4975 flow [2023-09-01 09:32:45,189 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:32:45,189 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1618 places, 1729 transitions, 4975 flow [2023-09-01 09:32:45,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1618 places, 1729 transitions, 4975 flow [2023-09-01 09:32:45,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1618 places, 1729 transitions, 4975 flow [2023-09-01 09:32:46,802 INFO L130 PetriNetUnfolder]: 223/2171 cut-off events. [2023-09-01 09:32:46,802 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-09-01 09:32:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2986 conditions, 2171 events. 223/2171 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9128 event pairs, 0 based on Foata normal form. 0/1873 useless extension candidates. Maximal degree in co-relation 2876. Up to 76 conditions per place. [2023-09-01 09:32:47,553 INFO L119 LiptonReduction]: Number of co-enabled transitions 2800530 [2023-09-01 09:33:01,364 INFO L134 LiptonReduction]: Checked pairs total: 7746883 [2023-09-01 09:33:01,364 INFO L136 LiptonReduction]: Total number of compositions: 1262 [2023-09-01 09:33:01,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:33:01,366 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:33:01,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:33:01,637 INFO L130 PetriNetUnfolder]: 83/929 cut-off events. [2023-09-01 09:33:01,637 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-09-01 09:33:01,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:33:01,637 INFO L208 CegarLoopForPetriNet]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:33:01,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:33:01,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:33:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash 690659698, now seen corresponding path program 1 times [2023-09-01 09:33:01,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:33:01,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751542550] [2023-09-01 09:33:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:33:01,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:33:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:01,697 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:33:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:01,766 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:33:01,766 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:33:01,767 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:33:01,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-09-01 09:33:01,767 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:33:01,768 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:33:01,768 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:33:01,768 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-09-01 09:33:01,915 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:33:01,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1661 places, 1775 transitions, 5146 flow [2023-09-01 09:33:03,430 INFO L130 PetriNetUnfolder]: 229/2229 cut-off events. [2023-09-01 09:33:03,430 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-09-01 09:33:03,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3085 conditions, 2229 events. 229/2229 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9374 event pairs, 0 based on Foata normal form. 0/1923 useless extension candidates. Maximal degree in co-relation 2974. Up to 78 conditions per place. [2023-09-01 09:33:03,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 1661 places, 1775 transitions, 5146 flow [2023-09-01 09:33:03,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1661 places, 1775 transitions, 5146 flow [2023-09-01 09:33:03,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:33:03,595 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1661 places, 1775 transitions, 5146 flow [2023-09-01 09:33:03,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1661 places, 1775 transitions, 5146 flow [2023-09-01 09:33:03,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1661 places, 1775 transitions, 5146 flow [2023-09-01 09:33:05,138 INFO L130 PetriNetUnfolder]: 229/2229 cut-off events. [2023-09-01 09:33:05,138 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-09-01 09:33:05,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3085 conditions, 2229 events. 229/2229 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9374 event pairs, 0 based on Foata normal form. 0/1923 useless extension candidates. Maximal degree in co-relation 2974. Up to 78 conditions per place. [2023-09-01 09:33:06,020 INFO L119 LiptonReduction]: Number of co-enabled transitions 2954880 [2023-09-01 09:33:20,141 INFO L134 LiptonReduction]: Checked pairs total: 8056401 [2023-09-01 09:33:20,141 INFO L136 LiptonReduction]: Total number of compositions: 1276 [2023-09-01 09:33:20,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:33:20,142 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:33:20,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:33:20,430 INFO L130 PetriNetUnfolder]: 83/949 cut-off events. [2023-09-01 09:33:20,430 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-09-01 09:33:20,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:33:20,431 INFO L208 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:33:20,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:33:20,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:33:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash 585910631, now seen corresponding path program 1 times [2023-09-01 09:33:20,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:33:20,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127749280] [2023-09-01 09:33:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:33:20,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:33:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:20,486 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:33:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:20,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:33:20,555 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:33:20,555 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:33:20,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-09-01 09:33:20,555 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:33:20,556 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:33:20,556 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:33:20,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-09-01 09:33:20,717 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:33:20,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1704 places, 1821 transitions, 5319 flow [2023-09-01 09:33:22,545 INFO L130 PetriNetUnfolder]: 235/2287 cut-off events. [2023-09-01 09:33:22,545 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-09-01 09:33:22,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 2287 events. 235/2287 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9651 event pairs, 0 based on Foata normal form. 0/1973 useless extension candidates. Maximal degree in co-relation 3073. Up to 80 conditions per place. [2023-09-01 09:33:22,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 1704 places, 1821 transitions, 5319 flow [2023-09-01 09:33:22,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1704 places, 1821 transitions, 5319 flow [2023-09-01 09:33:22,719 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:33:22,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1704 places, 1821 transitions, 5319 flow [2023-09-01 09:33:22,720 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1704 places, 1821 transitions, 5319 flow [2023-09-01 09:33:22,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1704 places, 1821 transitions, 5319 flow [2023-09-01 09:33:24,516 INFO L130 PetriNetUnfolder]: 235/2287 cut-off events. [2023-09-01 09:33:24,517 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-09-01 09:33:24,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 2287 events. 235/2287 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9651 event pairs, 0 based on Foata normal form. 0/1973 useless extension candidates. Maximal degree in co-relation 3073. Up to 80 conditions per place. [2023-09-01 09:33:25,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 3113370 [2023-09-01 09:33:40,444 INFO L134 LiptonReduction]: Checked pairs total: 8564240 [2023-09-01 09:33:40,444 INFO L136 LiptonReduction]: Total number of compositions: 1322 [2023-09-01 09:33:40,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:33:40,446 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:33:40,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:33:40,853 INFO L130 PetriNetUnfolder]: 84/973 cut-off events. [2023-09-01 09:33:40,853 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-09-01 09:33:40,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:33:40,853 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:33:40,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:33:40,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:33:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1276077987, now seen corresponding path program 1 times [2023-09-01 09:33:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:33:40,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255730416] [2023-09-01 09:33:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:33:40,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:33:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:40,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:33:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:33:40,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:33:40,985 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:33:40,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:33:40,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-09-01 09:33:40,986 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:33:40,987 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:33:40,987 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:33:40,987 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2023-09-01 09:33:41,214 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:33:41,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1747 places, 1867 transitions, 5494 flow [2023-09-01 09:33:43,053 INFO L130 PetriNetUnfolder]: 241/2345 cut-off events. [2023-09-01 09:33:43,053 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-09-01 09:33:43,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3286 conditions, 2345 events. 241/2345 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9889 event pairs, 0 based on Foata normal form. 0/2023 useless extension candidates. Maximal degree in co-relation 3173. Up to 82 conditions per place. [2023-09-01 09:33:43,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 1747 places, 1867 transitions, 5494 flow [2023-09-01 09:33:43,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1747 places, 1867 transitions, 5494 flow [2023-09-01 09:33:43,218 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:33:43,219 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1747 places, 1867 transitions, 5494 flow [2023-09-01 09:33:43,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1747 places, 1867 transitions, 5494 flow [2023-09-01 09:33:43,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1747 places, 1867 transitions, 5494 flow [2023-09-01 09:33:44,985 INFO L130 PetriNetUnfolder]: 241/2345 cut-off events. [2023-09-01 09:33:44,985 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-09-01 09:33:45,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3286 conditions, 2345 events. 241/2345 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9889 event pairs, 0 based on Foata normal form. 0/2023 useless extension candidates. Maximal degree in co-relation 3173. Up to 82 conditions per place. [2023-09-01 09:33:45,836 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276000 [2023-09-01 09:34:01,071 INFO L134 LiptonReduction]: Checked pairs total: 9101800 [2023-09-01 09:34:01,071 INFO L136 LiptonReduction]: Total number of compositions: 1361 [2023-09-01 09:34:01,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:34:01,073 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:34:01,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:34:01,437 INFO L130 PetriNetUnfolder]: 87/999 cut-off events. [2023-09-01 09:34:01,437 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-09-01 09:34:01,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:34:01,438 INFO L208 CegarLoopForPetriNet]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:34:01,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:34:01,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:34:01,438 INFO L85 PathProgramCache]: Analyzing trace with hash 972924042, now seen corresponding path program 1 times [2023-09-01 09:34:01,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:34:01,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774917411] [2023-09-01 09:34:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:34:01,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:34:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:01,501 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:34:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:01,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:34:01,568 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:34:01,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:34:01,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-09-01 09:34:01,569 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:34:01,569 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:34:01,569 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:34:01,569 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2023-09-01 09:34:01,719 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:34:01,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1790 places, 1913 transitions, 5671 flow [2023-09-01 09:34:03,523 INFO L130 PetriNetUnfolder]: 247/2403 cut-off events. [2023-09-01 09:34:03,523 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-09-01 09:34:03,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 2403 events. 247/2403 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10144 event pairs, 0 based on Foata normal form. 0/2073 useless extension candidates. Maximal degree in co-relation 3274. Up to 84 conditions per place. [2023-09-01 09:34:03,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 1790 places, 1913 transitions, 5671 flow [2023-09-01 09:34:03,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1790 places, 1913 transitions, 5671 flow [2023-09-01 09:34:03,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:34:03,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1790 places, 1913 transitions, 5671 flow [2023-09-01 09:34:03,714 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1790 places, 1913 transitions, 5671 flow [2023-09-01 09:34:03,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1790 places, 1913 transitions, 5671 flow [2023-09-01 09:34:05,707 INFO L130 PetriNetUnfolder]: 247/2403 cut-off events. [2023-09-01 09:34:05,707 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-09-01 09:34:05,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 2403 events. 247/2403 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10144 event pairs, 0 based on Foata normal form. 0/2073 useless extension candidates. Maximal degree in co-relation 3274. Up to 84 conditions per place. [2023-09-01 09:34:06,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 3442770 [2023-09-01 09:34:21,799 INFO L134 LiptonReduction]: Checked pairs total: 9529802 [2023-09-01 09:34:21,799 INFO L136 LiptonReduction]: Total number of compositions: 1400 [2023-09-01 09:34:21,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:34:21,801 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:34:21,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:34:22,231 INFO L130 PetriNetUnfolder]: 90/1027 cut-off events. [2023-09-01 09:34:22,231 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-09-01 09:34:22,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:34:22,231 INFO L208 CegarLoopForPetriNet]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:34:22,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:34:22,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:34:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2125548728, now seen corresponding path program 1 times [2023-09-01 09:34:22,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:34:22,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714376478] [2023-09-01 09:34:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:34:22,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:34:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:22,293 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:34:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:22,362 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:34:22,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:34:22,363 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:34:22,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-09-01 09:34:22,363 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:34:22,363 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:34:22,364 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:34:22,364 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2023-09-01 09:34:22,535 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:34:22,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1959 transitions, 5850 flow [2023-09-01 09:34:24,573 INFO L130 PetriNetUnfolder]: 253/2461 cut-off events. [2023-09-01 09:34:24,573 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-09-01 09:34:24,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3491 conditions, 2461 events. 253/2461 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10407 event pairs, 0 based on Foata normal form. 0/2123 useless extension candidates. Maximal degree in co-relation 3376. Up to 86 conditions per place. [2023-09-01 09:34:24,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 1833 places, 1959 transitions, 5850 flow [2023-09-01 09:34:24,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1833 places, 1959 transitions, 5850 flow [2023-09-01 09:34:24,754 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:34:24,754 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1833 places, 1959 transitions, 5850 flow [2023-09-01 09:34:24,754 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1833 places, 1959 transitions, 5850 flow [2023-09-01 09:34:24,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1959 transitions, 5850 flow [2023-09-01 09:34:26,697 INFO L130 PetriNetUnfolder]: 253/2461 cut-off events. [2023-09-01 09:34:26,697 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-09-01 09:34:26,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3491 conditions, 2461 events. 253/2461 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10407 event pairs, 0 based on Foata normal form. 0/2123 useless extension candidates. Maximal degree in co-relation 3376. Up to 86 conditions per place. [2023-09-01 09:34:27,663 INFO L119 LiptonReduction]: Number of co-enabled transitions 3613680 [2023-09-01 09:34:43,513 INFO L134 LiptonReduction]: Checked pairs total: 10069015 [2023-09-01 09:34:43,513 INFO L136 LiptonReduction]: Total number of compositions: 1431 [2023-09-01 09:34:43,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:34:43,515 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:34:43,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:34:43,976 INFO L130 PetriNetUnfolder]: 92/1053 cut-off events. [2023-09-01 09:34:43,976 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-09-01 09:34:43,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:34:43,977 INFO L208 CegarLoopForPetriNet]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:34:43,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:34:43,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:34:43,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1226174156, now seen corresponding path program 1 times [2023-09-01 09:34:43,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:34:43,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2482150] [2023-09-01 09:34:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:34:43,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:34:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:44,035 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:34:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:34:44,107 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:34:44,107 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:34:44,107 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:34:44,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-09-01 09:34:44,107 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:34:44,108 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:34:44,108 WARN L233 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:34:44,108 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2023-09-01 09:34:44,287 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:34:44,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1876 places, 2005 transitions, 6031 flow [2023-09-01 09:34:46,311 INFO L130 PetriNetUnfolder]: 259/2519 cut-off events. [2023-09-01 09:34:46,311 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-09-01 09:34:46,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 2519 events. 259/2519 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 10674 event pairs, 0 based on Foata normal form. 0/2173 useless extension candidates. Maximal degree in co-relation 3479. Up to 88 conditions per place. [2023-09-01 09:34:46,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 1876 places, 2005 transitions, 6031 flow [2023-09-01 09:34:46,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1876 places, 2005 transitions, 6031 flow [2023-09-01 09:34:46,523 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:34:46,523 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1876 places, 2005 transitions, 6031 flow [2023-09-01 09:34:46,523 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1876 places, 2005 transitions, 6031 flow [2023-09-01 09:34:46,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1876 places, 2005 transitions, 6031 flow [2023-09-01 09:34:48,663 INFO L130 PetriNetUnfolder]: 259/2519 cut-off events. [2023-09-01 09:34:48,663 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-09-01 09:34:48,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 2519 events. 259/2519 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 10674 event pairs, 0 based on Foata normal form. 0/2173 useless extension candidates. Maximal degree in co-relation 3479. Up to 88 conditions per place. [2023-09-01 09:34:49,639 INFO L119 LiptonReduction]: Number of co-enabled transitions 3788730 [2023-09-01 09:35:06,186 INFO L134 LiptonReduction]: Checked pairs total: 10490213 [2023-09-01 09:35:06,186 INFO L136 LiptonReduction]: Total number of compositions: 1467 [2023-09-01 09:35:06,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:35:06,188 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:35:06,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:35:06,631 INFO L130 PetriNetUnfolder]: 95/1079 cut-off events. [2023-09-01 09:35:06,631 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-09-01 09:35:06,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:35:06,631 INFO L208 CegarLoopForPetriNet]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:35:06,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:35:06,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:35:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash -992362516, now seen corresponding path program 1 times [2023-09-01 09:35:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:35:06,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988969485] [2023-09-01 09:35:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:35:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:35:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:06,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:35:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:06,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:35:06,778 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:35:06,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:35:06,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-09-01 09:35:06,779 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:35:06,779 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:35:06,779 WARN L233 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:35:06,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2023-09-01 09:35:06,962 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:35:06,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1919 places, 2051 transitions, 6214 flow [2023-09-01 09:35:09,139 INFO L130 PetriNetUnfolder]: 265/2577 cut-off events. [2023-09-01 09:35:09,139 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-09-01 09:35:09,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 2577 events. 265/2577 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 10906 event pairs, 0 based on Foata normal form. 0/2223 useless extension candidates. Maximal degree in co-relation 3583. Up to 90 conditions per place. [2023-09-01 09:35:09,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 1919 places, 2051 transitions, 6214 flow [2023-09-01 09:35:09,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1919 places, 2051 transitions, 6214 flow [2023-09-01 09:35:09,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:35:09,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1919 places, 2051 transitions, 6214 flow [2023-09-01 09:35:09,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1919 places, 2051 transitions, 6214 flow [2023-09-01 09:35:09,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1919 places, 2051 transitions, 6214 flow [2023-09-01 09:35:11,465 INFO L130 PetriNetUnfolder]: 265/2577 cut-off events. [2023-09-01 09:35:11,465 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-09-01 09:35:11,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 2577 events. 265/2577 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 10906 event pairs, 0 based on Foata normal form. 0/2223 useless extension candidates. Maximal degree in co-relation 3583. Up to 90 conditions per place. [2023-09-01 09:35:12,447 INFO L119 LiptonReduction]: Number of co-enabled transitions 3967920 [2023-09-01 09:35:29,997 INFO L134 LiptonReduction]: Checked pairs total: 11033405 [2023-09-01 09:35:29,997 INFO L136 LiptonReduction]: Total number of compositions: 1503 [2023-09-01 09:35:29,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:35:29,999 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:35:29,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:35:30,446 INFO L130 PetriNetUnfolder]: 98/1105 cut-off events. [2023-09-01 09:35:30,446 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-09-01 09:35:30,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:35:30,447 INFO L208 CegarLoopForPetriNet]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:35:30,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:35:30,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:35:30,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2020530512, now seen corresponding path program 1 times [2023-09-01 09:35:30,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:35:30,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531170621] [2023-09-01 09:35:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:35:30,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:35:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:30,512 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:35:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:30,592 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:35:30,593 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:35:30,593 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:35:30,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-09-01 09:35:30,593 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:35:30,594 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:35:30,594 WARN L233 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:35:30,594 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2023-09-01 09:35:30,742 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:35:30,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1962 places, 2097 transitions, 6399 flow [2023-09-01 09:35:33,041 INFO L130 PetriNetUnfolder]: 271/2635 cut-off events. [2023-09-01 09:35:33,042 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-09-01 09:35:33,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3806 conditions, 2635 events. 271/2635 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 11154 event pairs, 0 based on Foata normal form. 0/2273 useless extension candidates. Maximal degree in co-relation 3688. Up to 92 conditions per place. [2023-09-01 09:35:33,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 1962 places, 2097 transitions, 6399 flow [2023-09-01 09:35:33,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1962 places, 2097 transitions, 6399 flow [2023-09-01 09:35:33,254 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:35:33,254 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1962 places, 2097 transitions, 6399 flow [2023-09-01 09:35:33,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1962 places, 2097 transitions, 6399 flow [2023-09-01 09:35:33,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1962 places, 2097 transitions, 6399 flow [2023-09-01 09:35:35,443 INFO L130 PetriNetUnfolder]: 271/2635 cut-off events. [2023-09-01 09:35:35,443 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-09-01 09:35:35,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3806 conditions, 2635 events. 271/2635 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 11154 event pairs, 0 based on Foata normal form. 0/2273 useless extension candidates. Maximal degree in co-relation 3688. Up to 92 conditions per place. [2023-09-01 09:35:36,511 INFO L119 LiptonReduction]: Number of co-enabled transitions 4151250 [2023-09-01 09:35:54,322 INFO L134 LiptonReduction]: Checked pairs total: 11461579 [2023-09-01 09:35:54,322 INFO L136 LiptonReduction]: Total number of compositions: 1532 [2023-09-01 09:35:54,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:35:54,324 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:35:54,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:35:54,759 INFO L130 PetriNetUnfolder]: 99/1129 cut-off events. [2023-09-01 09:35:54,759 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-09-01 09:35:54,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:35:54,759 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:35:54,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:35:54,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:35:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash 383678792, now seen corresponding path program 1 times [2023-09-01 09:35:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:35:54,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102187636] [2023-09-01 09:35:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:35:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:35:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:54,832 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:35:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:35:54,916 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:35:54,916 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:35:54,916 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:35:54,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-09-01 09:35:54,917 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:35:54,917 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:35:54,917 WARN L233 ceAbstractionStarter]: 45 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:35:54,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 46 thread instances. [2023-09-01 09:35:55,161 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:35:55,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2005 places, 2143 transitions, 6586 flow [2023-09-01 09:35:57,567 INFO L130 PetriNetUnfolder]: 277/2693 cut-off events. [2023-09-01 09:35:57,567 INFO L131 PetriNetUnfolder]: For 17250/17250 co-relation queries the response was YES. [2023-09-01 09:35:57,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 2693 events. 277/2693 cut-off events. For 17250/17250 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 11431 event pairs, 0 based on Foata normal form. 0/2323 useless extension candidates. Maximal degree in co-relation 3794. Up to 94 conditions per place. [2023-09-01 09:35:57,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 2005 places, 2143 transitions, 6586 flow [2023-09-01 09:35:57,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2005 places, 2143 transitions, 6586 flow [2023-09-01 09:35:57,803 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:35:57,803 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2005 places, 2143 transitions, 6586 flow [2023-09-01 09:35:57,803 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2005 places, 2143 transitions, 6586 flow [2023-09-01 09:35:57,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2005 places, 2143 transitions, 6586 flow [2023-09-01 09:36:00,141 INFO L130 PetriNetUnfolder]: 277/2693 cut-off events. [2023-09-01 09:36:00,141 INFO L131 PetriNetUnfolder]: For 17250/17250 co-relation queries the response was YES. [2023-09-01 09:36:00,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 2693 events. 277/2693 cut-off events. For 17250/17250 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 11431 event pairs, 0 based on Foata normal form. 0/2323 useless extension candidates. Maximal degree in co-relation 3794. Up to 94 conditions per place. [2023-09-01 09:36:01,219 INFO L119 LiptonReduction]: Number of co-enabled transitions 4338720 [2023-09-01 09:36:19,597 INFO L134 LiptonReduction]: Checked pairs total: 12075571 [2023-09-01 09:36:19,597 INFO L136 LiptonReduction]: Total number of compositions: 1583 [2023-09-01 09:36:19,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:36:19,598 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:36:19,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:36:20,118 INFO L130 PetriNetUnfolder]: 102/1156 cut-off events. [2023-09-01 09:36:20,118 INFO L131 PetriNetUnfolder]: For 17250/17250 co-relation queries the response was YES. [2023-09-01 09:36:20,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:36:20,118 INFO L208 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:36:20,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:36:20,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:36:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash -175844291, now seen corresponding path program 1 times [2023-09-01 09:36:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:36:20,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683152311] [2023-09-01 09:36:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:36:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:36:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:36:20,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:36:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:36:20,275 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:36:20,275 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:36:20,275 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:36:20,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-09-01 09:36:20,276 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:36:20,276 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:36:20,276 WARN L233 ceAbstractionStarter]: 46 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:36:20,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 47 thread instances. [2023-09-01 09:36:20,466 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:36:20,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2048 places, 2189 transitions, 6775 flow [2023-09-01 09:36:22,904 INFO L130 PetriNetUnfolder]: 283/2751 cut-off events. [2023-09-01 09:36:22,904 INFO L131 PetriNetUnfolder]: For 18377/18377 co-relation queries the response was YES. [2023-09-01 09:36:23,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4021 conditions, 2751 events. 283/2751 cut-off events. For 18377/18377 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 11627 event pairs, 0 based on Foata normal form. 0/2373 useless extension candidates. Maximal degree in co-relation 3901. Up to 96 conditions per place. [2023-09-01 09:36:23,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 2048 places, 2189 transitions, 6775 flow [2023-09-01 09:36:23,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2048 places, 2189 transitions, 6775 flow [2023-09-01 09:36:23,148 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:36:23,148 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2048 places, 2189 transitions, 6775 flow [2023-09-01 09:36:23,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2048 places, 2189 transitions, 6775 flow [2023-09-01 09:36:23,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2048 places, 2189 transitions, 6775 flow [2023-09-01 09:36:25,579 INFO L130 PetriNetUnfolder]: 283/2751 cut-off events. [2023-09-01 09:36:25,579 INFO L131 PetriNetUnfolder]: For 18377/18377 co-relation queries the response was YES. [2023-09-01 09:36:25,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4021 conditions, 2751 events. 283/2751 cut-off events. For 18377/18377 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 11627 event pairs, 0 based on Foata normal form. 0/2373 useless extension candidates. Maximal degree in co-relation 3901. Up to 96 conditions per place. [2023-09-01 09:36:26,726 INFO L119 LiptonReduction]: Number of co-enabled transitions 4530330 [2023-09-01 09:36:45,847 INFO L134 LiptonReduction]: Checked pairs total: 12547179 [2023-09-01 09:36:45,847 INFO L136 LiptonReduction]: Total number of compositions: 1626 [2023-09-01 09:36:45,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:36:45,849 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:36:45,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:36:46,432 INFO L130 PetriNetUnfolder]: 104/1180 cut-off events. [2023-09-01 09:36:46,433 INFO L131 PetriNetUnfolder]: For 18377/18377 co-relation queries the response was YES. [2023-09-01 09:36:46,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:36:46,433 INFO L208 CegarLoopForPetriNet]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:36:46,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:36:46,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:36:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash 12337259, now seen corresponding path program 1 times [2023-09-01 09:36:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:36:46,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97768835] [2023-09-01 09:36:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:36:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:36:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:36:46,514 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:36:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:36:46,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:36:46,605 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:36:46,605 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:36:46,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-09-01 09:36:46,606 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:36:46,606 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:36:46,606 WARN L233 ceAbstractionStarter]: 47 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:36:46,606 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 48 thread instances. [2023-09-01 09:36:46,769 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:36:46,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2091 places, 2235 transitions, 6966 flow [2023-09-01 09:36:49,348 INFO L130 PetriNetUnfolder]: 289/2809 cut-off events. [2023-09-01 09:36:49,348 INFO L131 PetriNetUnfolder]: For 19552/19552 co-relation queries the response was YES. [2023-09-01 09:36:49,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 2809 events. 289/2809 cut-off events. For 19552/19552 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 11917 event pairs, 0 based on Foata normal form. 0/2423 useless extension candidates. Maximal degree in co-relation 4009. Up to 98 conditions per place. [2023-09-01 09:36:49,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 2091 places, 2235 transitions, 6966 flow [2023-09-01 09:36:49,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2091 places, 2235 transitions, 6966 flow [2023-09-01 09:36:49,623 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:36:49,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2091 places, 2235 transitions, 6966 flow [2023-09-01 09:36:49,623 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2091 places, 2235 transitions, 6966 flow [2023-09-01 09:36:49,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2091 places, 2235 transitions, 6966 flow [2023-09-01 09:36:52,454 INFO L130 PetriNetUnfolder]: 289/2809 cut-off events. [2023-09-01 09:36:52,454 INFO L131 PetriNetUnfolder]: For 19552/19552 co-relation queries the response was YES. [2023-09-01 09:36:52,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 2809 events. 289/2809 cut-off events. For 19552/19552 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 11917 event pairs, 0 based on Foata normal form. 0/2423 useless extension candidates. Maximal degree in co-relation 4009. Up to 98 conditions per place. [2023-09-01 09:36:53,743 INFO L119 LiptonReduction]: Number of co-enabled transitions 4726080 [2023-09-01 09:37:14,078 INFO L134 LiptonReduction]: Checked pairs total: 12917930 [2023-09-01 09:37:14,078 INFO L136 LiptonReduction]: Total number of compositions: 1621 [2023-09-01 09:37:14,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:37:14,080 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:37:14,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:37:14,653 INFO L130 PetriNetUnfolder]: 108/1210 cut-off events. [2023-09-01 09:37:14,653 INFO L131 PetriNetUnfolder]: For 19552/19552 co-relation queries the response was YES. [2023-09-01 09:37:14,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:37:14,654 INFO L208 CegarLoopForPetriNet]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:37:14,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:37:14,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:37:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash -99280816, now seen corresponding path program 1 times [2023-09-01 09:37:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:37:14,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333981352] [2023-09-01 09:37:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:37:14,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:37:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:37:14,732 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:37:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:37:14,817 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:37:14,818 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:37:14,818 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:37:14,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-09-01 09:37:14,818 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:37:14,818 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:37:14,818 WARN L233 ceAbstractionStarter]: 48 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:37:14,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 49 thread instances. [2023-09-01 09:37:14,984 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:37:14,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2134 places, 2281 transitions, 7159 flow [2023-09-01 09:37:17,649 INFO L130 PetriNetUnfolder]: 295/2867 cut-off events. [2023-09-01 09:37:17,649 INFO L131 PetriNetUnfolder]: For 20776/20776 co-relation queries the response was YES. [2023-09-01 09:37:17,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4240 conditions, 2867 events. 295/2867 cut-off events. For 20776/20776 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 12153 event pairs, 0 based on Foata normal form. 0/2473 useless extension candidates. Maximal degree in co-relation 4118. Up to 100 conditions per place. [2023-09-01 09:37:17,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 2134 places, 2281 transitions, 7159 flow [2023-09-01 09:37:17,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2134 places, 2281 transitions, 7159 flow [2023-09-01 09:37:17,941 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:37:17,941 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2134 places, 2281 transitions, 7159 flow [2023-09-01 09:37:17,941 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2134 places, 2281 transitions, 7159 flow [2023-09-01 09:37:17,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2134 places, 2281 transitions, 7159 flow [2023-09-01 09:37:21,416 INFO L130 PetriNetUnfolder]: 295/2867 cut-off events. [2023-09-01 09:37:21,416 INFO L131 PetriNetUnfolder]: For 20776/20776 co-relation queries the response was YES. [2023-09-01 09:37:21,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4240 conditions, 2867 events. 295/2867 cut-off events. For 20776/20776 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 12153 event pairs, 0 based on Foata normal form. 0/2473 useless extension candidates. Maximal degree in co-relation 4118. Up to 100 conditions per place. [2023-09-01 09:37:23,258 INFO L119 LiptonReduction]: Number of co-enabled transitions 4925970 [2023-09-01 09:37:44,282 INFO L134 LiptonReduction]: Checked pairs total: 13544624 [2023-09-01 09:37:44,282 INFO L136 LiptonReduction]: Total number of compositions: 1674 [2023-09-01 09:37:44,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:37:44,284 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:37:44,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:37:44,878 INFO L130 PetriNetUnfolder]: 109/1233 cut-off events. [2023-09-01 09:37:44,879 INFO L131 PetriNetUnfolder]: For 20776/20776 co-relation queries the response was YES. [2023-09-01 09:37:44,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:37:44,879 INFO L208 CegarLoopForPetriNet]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:37:44,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:37:44,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:37:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash -952636043, now seen corresponding path program 1 times [2023-09-01 09:37:44,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:37:44,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451638818] [2023-09-01 09:37:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:37:44,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:37:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:37:44,956 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:37:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:37:45,058 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:37:45,058 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:37:45,058 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:37:45,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-09-01 09:37:45,059 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:37:45,059 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:37:45,059 WARN L233 ceAbstractionStarter]: 49 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:37:45,059 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 50 thread instances. [2023-09-01 09:37:45,228 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:37:45,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2177 places, 2327 transitions, 7354 flow [2023-09-01 09:37:48,143 INFO L130 PetriNetUnfolder]: 301/2925 cut-off events. [2023-09-01 09:37:48,143 INFO L131 PetriNetUnfolder]: For 22050/22050 co-relation queries the response was YES. [2023-09-01 09:37:48,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 2925 events. 301/2925 cut-off events. For 22050/22050 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 12414 event pairs, 0 based on Foata normal form. 0/2523 useless extension candidates. Maximal degree in co-relation 4228. Up to 102 conditions per place. [2023-09-01 09:37:48,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 2177 places, 2327 transitions, 7354 flow [2023-09-01 09:37:48,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2177 places, 2327 transitions, 7354 flow [2023-09-01 09:37:48,390 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:37:48,390 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2177 places, 2327 transitions, 7354 flow [2023-09-01 09:37:48,390 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2177 places, 2327 transitions, 7354 flow [2023-09-01 09:37:48,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2177 places, 2327 transitions, 7354 flow [2023-09-01 09:37:51,500 INFO L130 PetriNetUnfolder]: 301/2925 cut-off events. [2023-09-01 09:37:51,501 INFO L131 PetriNetUnfolder]: For 22050/22050 co-relation queries the response was YES. [2023-09-01 09:37:51,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 2925 events. 301/2925 cut-off events. For 22050/22050 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 12414 event pairs, 0 based on Foata normal form. 0/2523 useless extension candidates. Maximal degree in co-relation 4228. Up to 102 conditions per place. [2023-09-01 09:37:52,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 5130000 [2023-09-01 09:38:14,307 INFO L134 LiptonReduction]: Checked pairs total: 14194307 [2023-09-01 09:38:14,307 INFO L136 LiptonReduction]: Total number of compositions: 1683 [2023-09-01 09:38:14,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:38:14,309 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:38:14,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:38:14,955 INFO L130 PetriNetUnfolder]: 111/1258 cut-off events. [2023-09-01 09:38:14,955 INFO L131 PetriNetUnfolder]: For 22050/22050 co-relation queries the response was YES. [2023-09-01 09:38:14,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:38:14,955 INFO L208 CegarLoopForPetriNet]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:38:14,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:38:14,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:38:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash 29428119, now seen corresponding path program 1 times [2023-09-01 09:38:14,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:38:14,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728531488] [2023-09-01 09:38:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:38:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:38:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:38:15,036 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:38:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:38:15,146 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:38:15,147 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:38:15,147 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:38:15,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-09-01 09:38:15,147 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:38:15,148 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:38:15,148 WARN L233 ceAbstractionStarter]: 50 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:38:15,148 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 51 thread instances. [2023-09-01 09:38:15,334 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:38:15,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2220 places, 2373 transitions, 7551 flow [2023-09-01 09:38:18,196 INFO L130 PetriNetUnfolder]: 307/2983 cut-off events. [2023-09-01 09:38:18,197 INFO L131 PetriNetUnfolder]: For 23375/23375 co-relation queries the response was YES. [2023-09-01 09:38:18,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4463 conditions, 2983 events. 307/2983 cut-off events. For 23375/23375 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 12688 event pairs, 0 based on Foata normal form. 0/2573 useless extension candidates. Maximal degree in co-relation 4339. Up to 104 conditions per place. [2023-09-01 09:38:18,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 2220 places, 2373 transitions, 7551 flow [2023-09-01 09:38:18,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2220 places, 2373 transitions, 7551 flow [2023-09-01 09:38:18,492 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:38:18,492 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2220 places, 2373 transitions, 7551 flow [2023-09-01 09:38:18,492 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2220 places, 2373 transitions, 7551 flow [2023-09-01 09:38:18,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2220 places, 2373 transitions, 7551 flow [2023-09-01 09:38:21,624 INFO L130 PetriNetUnfolder]: 307/2983 cut-off events. [2023-09-01 09:38:21,624 INFO L131 PetriNetUnfolder]: For 23375/23375 co-relation queries the response was YES. [2023-09-01 09:38:21,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4463 conditions, 2983 events. 307/2983 cut-off events. For 23375/23375 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 12688 event pairs, 0 based on Foata normal form. 0/2573 useless extension candidates. Maximal degree in co-relation 4339. Up to 104 conditions per place. [2023-09-01 09:38:23,062 INFO L119 LiptonReduction]: Number of co-enabled transitions 5338170 [2023-09-01 09:38:45,332 INFO L134 LiptonReduction]: Checked pairs total: 14743118 [2023-09-01 09:38:45,332 INFO L136 LiptonReduction]: Total number of compositions: 1710 [2023-09-01 09:38:45,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:38:45,334 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:38:45,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:38:46,015 INFO L130 PetriNetUnfolder]: 114/1285 cut-off events. [2023-09-01 09:38:46,016 INFO L131 PetriNetUnfolder]: For 23375/23375 co-relation queries the response was YES. [2023-09-01 09:38:46,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:38:46,016 INFO L208 CegarLoopForPetriNet]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:38:46,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:38:46,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:38:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1613968687, now seen corresponding path program 1 times [2023-09-01 09:38:46,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:38:46,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000459340] [2023-09-01 09:38:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:38:46,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:38:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:38:46,104 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:38:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:38:46,204 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:38:46,204 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:38:46,204 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:38:46,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-09-01 09:38:46,205 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:38:46,205 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:38:46,205 WARN L233 ceAbstractionStarter]: 51 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:38:46,205 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 52 thread instances. [2023-09-01 09:38:46,391 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:38:46,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2263 places, 2419 transitions, 7750 flow [2023-09-01 09:38:49,344 INFO L130 PetriNetUnfolder]: 313/3041 cut-off events. [2023-09-01 09:38:49,344 INFO L131 PetriNetUnfolder]: For 24752/24752 co-relation queries the response was YES. [2023-09-01 09:38:49,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4576 conditions, 3041 events. 313/3041 cut-off events. For 24752/24752 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 12924 event pairs, 0 based on Foata normal form. 0/2623 useless extension candidates. Maximal degree in co-relation 4451. Up to 106 conditions per place. [2023-09-01 09:38:49,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 2263 places, 2419 transitions, 7750 flow [2023-09-01 09:38:49,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2263 places, 2419 transitions, 7750 flow [2023-09-01 09:38:49,658 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:38:49,658 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2263 places, 2419 transitions, 7750 flow [2023-09-01 09:38:49,658 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2263 places, 2419 transitions, 7750 flow [2023-09-01 09:38:49,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2263 places, 2419 transitions, 7750 flow [2023-09-01 09:38:53,103 INFO L130 PetriNetUnfolder]: 313/3041 cut-off events. [2023-09-01 09:38:53,103 INFO L131 PetriNetUnfolder]: For 24752/24752 co-relation queries the response was YES. [2023-09-01 09:38:53,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4576 conditions, 3041 events. 313/3041 cut-off events. For 24752/24752 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 12924 event pairs, 0 based on Foata normal form. 0/2623 useless extension candidates. Maximal degree in co-relation 4451. Up to 106 conditions per place. [2023-09-01 09:38:54,622 INFO L119 LiptonReduction]: Number of co-enabled transitions 5550480 [2023-09-01 09:39:17,518 INFO L134 LiptonReduction]: Checked pairs total: 15342158 [2023-09-01 09:39:17,518 INFO L136 LiptonReduction]: Total number of compositions: 1756 [2023-09-01 09:39:17,520 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:39:17,520 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e0ae70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:39:17,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:39:18,228 INFO L130 PetriNetUnfolder]: 114/1305 cut-off events. [2023-09-01 09:39:18,228 INFO L131 PetriNetUnfolder]: For 24752/24752 co-relation queries the response was YES. [2023-09-01 09:39:18,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:39:18,229 INFO L208 CegarLoopForPetriNet]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:39:18,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:39:18,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:39:18,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1296358125, now seen corresponding path program 1 times [2023-09-01 09:39:18,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:39:18,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618072594] [2023-09-01 09:39:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:39:18,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:39:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:39:18,330 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:39:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:39:18,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:39:18,440 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:39:18,441 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:39:18,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-09-01 09:39:18,441 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:39:18,441 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:39:18,441 WARN L233 ceAbstractionStarter]: 52 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:39:18,442 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 53 thread instances. [2023-09-01 09:39:18,675 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:39:18,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2306 places, 2465 transitions, 7951 flow [2023-09-01 09:39:22,069 INFO L130 PetriNetUnfolder]: 319/3099 cut-off events. [2023-09-01 09:39:22,069 INFO L131 PetriNetUnfolder]: For 26182/26182 co-relation queries the response was YES. [2023-09-01 09:39:22,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4690 conditions, 3099 events. 319/3099 cut-off events. For 26182/26182 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 13199 event pairs, 0 based on Foata normal form. 0/2673 useless extension candidates. Maximal degree in co-relation 4564. Up to 108 conditions per place. [2023-09-01 09:39:22,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 2306 places, 2465 transitions, 7951 flow [2023-09-01 09:39:22,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2306 places, 2465 transitions, 7951 flow [2023-09-01 09:39:22,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:39:22,373 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2306 places, 2465 transitions, 7951 flow [2023-09-01 09:39:22,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2306 places, 2465 transitions, 7951 flow [2023-09-01 09:39:22,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2306 places, 2465 transitions, 7951 flow [2023-09-01 09:39:25,584 INFO L130 PetriNetUnfolder]: 319/3099 cut-off events. [2023-09-01 09:39:25,584 INFO L131 PetriNetUnfolder]: For 26182/26182 co-relation queries the response was YES. [2023-09-01 09:39:25,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4690 conditions, 3099 events. 319/3099 cut-off events. For 26182/26182 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 13199 event pairs, 0 based on Foata normal form. 0/2673 useless extension candidates. Maximal degree in co-relation 4564. Up to 108 conditions per place. [2023-09-01 09:39:27,126 INFO L119 LiptonReduction]: Number of co-enabled transitions 5766930 Killed by 15