./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.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/goblint-regression/28-race_reach_70-funloop_racefree.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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --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 11:07:48,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:07:48,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:07:48,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:07:48,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:07:48,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:07:48,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:07:48,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:07:48,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:07:48,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:07:48,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:07:48,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:07:48,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:07:48,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:07:48,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:07:48,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:07:48,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:07:48,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:07:48,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:07:48,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:07:48,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:07:48,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:07:48,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:07:48,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:07:48,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:07:48,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:07:48,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:07:48,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:07:48,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:07:48,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:07:48,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:07:48,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:07:48,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:07:48,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:07:48,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:07:48,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:07:48,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:07:48,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:07:48,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:07:48,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:07:48,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:07:48,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:07:48,895 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:07:48,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:07:48,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:07:48,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:07:48,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:07:48,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:07:48,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:07:48,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:07:48,898 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:07:48,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:07:48,899 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:07:48,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:07:48,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:07:48,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:07:48,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:07:48,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:07:48,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:07:48,900 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:07:48,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:07:48,901 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:07:48,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:07:48,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:07:48,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:07:48,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:07:48,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:07:48,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:07:48,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:07:48,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:07:48,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:07:48,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:07:48,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:07:48,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:07:48,903 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:07:48,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:07:48,904 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:07:48,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:07:49,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:07:49,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:07:49,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:07:49,208 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:07:49,209 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:07:49,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-09-01 11:07:50,453 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:07:50,723 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:07:50,723 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-09-01 11:07:50,754 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23b4d6b0/0ec84d5cf1774901a61170f091928c07/FLAG2de582bc5 [2023-09-01 11:07:50,768 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23b4d6b0/0ec84d5cf1774901a61170f091928c07 [2023-09-01 11:07:50,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:07:50,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:07:50,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:07:50,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:07:50,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:07:50,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:07:50" (1/1) ... [2023-09-01 11:07:50,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@307ef199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:50, skipping insertion in model container [2023-09-01 11:07:50,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:07:50" (1/1) ... [2023-09-01 11:07:50,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:07:50,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:07:51,134 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-09-01 11:07:51,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:07:51,204 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:07:51,237 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-09-01 11:07:51,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:07:51,304 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:07:51,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51 WrapperNode [2023-09-01 11:07:51,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:07:51,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:07:51,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:07:51,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:07:51,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,346 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 195 [2023-09-01 11:07:51,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:07:51,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:07:51,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:07:51,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:07:51,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,373 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:07:51,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:07:51,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:07:51,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:07:51,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (1/1) ... [2023-09-01 11:07:51,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:07:51,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:07:51,422 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 11:07:51,429 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 11:07:51,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:07:51,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:07:51,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:07:51,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:07:51,447 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 11:07:51,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:07:51,448 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 11:07:51,448 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 11:07:51,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:07:51,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:07:51,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:07:51,449 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 11:07:51,546 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:07:51,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:07:51,811 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:07:51,823 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:07:51,823 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-09-01 11:07:51,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:07:51 BoogieIcfgContainer [2023-09-01 11:07:51,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:07:51,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:07:51,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:07:51,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:07:51,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:07:50" (1/3) ... [2023-09-01 11:07:51,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240fef4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:07:51, skipping insertion in model container [2023-09-01 11:07:51,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:07:51" (2/3) ... [2023-09-01 11:07:51,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240fef4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:07:51, skipping insertion in model container [2023-09-01 11:07:51,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:07:51" (3/3) ... [2023-09-01 11:07:51,831 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-09-01 11:07:51,836 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:07:51,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:07:51,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 11:07:51,842 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:07:51,931 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 11:07:51,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 192 transitions, 392 flow [2023-09-01 11:07:52,075 INFO L130 PetriNetUnfolder]: 49/273 cut-off events. [2023-09-01 11:07:52,076 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 11:07:52,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 49/273 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 975 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-09-01 11:07:52,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 192 transitions, 392 flow [2023-09-01 11:07:52,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 187 transitions, 379 flow [2023-09-01 11:07:52,091 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:07:52,100 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 187 transitions, 379 flow [2023-09-01 11:07:52,103 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 187 transitions, 379 flow [2023-09-01 11:07:52,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 187 transitions, 379 flow [2023-09-01 11:07:52,147 INFO L130 PetriNetUnfolder]: 48/268 cut-off events. [2023-09-01 11:07:52,147 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:07:52,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 268 events. 48/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 917 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-09-01 11:07:52,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 12006 [2023-09-01 11:07:54,302 INFO L134 LiptonReduction]: Checked pairs total: 18220 [2023-09-01 11:07:54,302 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-09-01 11:07:54,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:07:54,318 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;@7f4644c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:07:54,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:07:54,324 INFO L130 PetriNetUnfolder]: 11/39 cut-off events. [2023-09-01 11:07:54,324 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:07:54,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:07:54,325 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 11:07:54,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:07:54,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:07:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -928907132, now seen corresponding path program 1 times [2023-09-01 11:07:54,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:07:54,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627712060] [2023-09-01 11:07:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:07:54,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:07:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:07:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:07:54,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:07:54,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627712060] [2023-09-01 11:07:54,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627712060] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:07:54,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:07:54,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:07:54,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246126624] [2023-09-01 11:07:54,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:07:54,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:07:54,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:07:54,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:07:54,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:07:54,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 342 [2023-09-01 11:07:54,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 70 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:54,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:07:54,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 342 [2023-09-01 11:07:54,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:07:54,716 INFO L130 PetriNetUnfolder]: 380/772 cut-off events. [2023-09-01 11:07:54,717 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:07:54,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 772 events. 380/772 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3513 event pairs, 306 based on Foata normal form. 76/711 useless extension candidates. Maximal degree in co-relation 1428. Up to 707 conditions per place. [2023-09-01 11:07:54,719 INFO L137 encePairwiseOnDemand]: 316/342 looper letters, 24 selfloop transitions, 2 changer transitions 19/48 dead transitions. [2023-09-01 11:07:54,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 185 flow [2023-09-01 11:07:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:07:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:07:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-09-01 11:07:54,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233918128654971 [2023-09-01 11:07:54,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-09-01 11:07:54,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-09-01 11:07:54,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:07:54,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-09-01 11:07:54,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:54,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:54,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:54,746 INFO L175 Difference]: Start difference. First operand has 46 places, 70 transitions, 145 flow. Second operand 3 states and 537 transitions. [2023-09-01 11:07:54,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 185 flow [2023-09-01 11:07:54,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 185 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:07:54,750 INFO L231 Difference]: Finished difference. Result has 48 places, 29 transitions, 73 flow [2023-09-01 11:07:54,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=48, PETRI_TRANSITIONS=29} [2023-09-01 11:07:54,754 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-09-01 11:07:54,754 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 29 transitions, 73 flow [2023-09-01 11:07:54,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:54,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:07:54,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:07:54,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:07:54,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:07:54,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:07:54,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1418114387, now seen corresponding path program 1 times [2023-09-01 11:07:54,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:07:54,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975867584] [2023-09-01 11:07:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:07:54,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:07:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:07:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:07:54,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:07:54,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975867584] [2023-09-01 11:07:54,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975867584] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:07:54,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97827247] [2023-09-01 11:07:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:07:54,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:07:54,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:07:54,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:07:54,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:07:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:07:54,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:07:54,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:07:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:07:54,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:07:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:07:54,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97827247] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:07:54,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:07:54,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:07:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157019914] [2023-09-01 11:07:54,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:07:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:07:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:07:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:07:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:07:54,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-09-01 11:07:54,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 157.57142857142858) internal successors, (1103), 7 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:54,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:07:54,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-09-01 11:07:54,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:07:55,051 INFO L130 PetriNetUnfolder]: 60/146 cut-off events. [2023-09-01 11:07:55,051 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:07:55,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 146 events. 60/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 398 event pairs, 51 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 287. Up to 133 conditions per place. [2023-09-01 11:07:55,051 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 24 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-09-01 11:07:55,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 143 flow [2023-09-01 11:07:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:07:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:07:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 968 transitions. [2023-09-01 11:07:55,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47173489278752434 [2023-09-01 11:07:55,054 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 968 transitions. [2023-09-01 11:07:55,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 968 transitions. [2023-09-01 11:07:55,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:07:55,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 968 transitions. [2023-09-01 11:07:55,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:55,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:55,072 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:55,072 INFO L175 Difference]: Start difference. First operand has 48 places, 29 transitions, 73 flow. Second operand 6 states and 968 transitions. [2023-09-01 11:07:55,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 143 flow [2023-09-01 11:07:55,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:07:55,073 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-09-01 11:07:55,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-09-01 11:07:55,073 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -8 predicate places. [2023-09-01 11:07:55,074 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-09-01 11:07:55,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.57142857142858) internal successors, (1103), 7 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:55,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:07:55,074 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 11:07:55,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 11:07:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:07:55,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:07:55,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:07:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1765262020, now seen corresponding path program 2 times [2023-09-01 11:07:55,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:07:55,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546274650] [2023-09-01 11:07:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:07:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:07:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:07:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:07:55,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:07:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546274650] [2023-09-01 11:07:55,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546274650] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:07:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878513756] [2023-09-01 11:07:55,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:07:55,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:07:55,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:07:55,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:07:55,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:07:55,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:07:55,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:07:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:07:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:07:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:07:55,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:07:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:07:55,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878513756] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:07:55,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:07:55,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:07:55,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154945533] [2023-09-01 11:07:55,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:07:55,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:07:55,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:07:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:07:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:07:55,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-09-01 11:07:55,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:55,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:07:55,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-09-01 11:07:55,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:07:55,707 INFO L130 PetriNetUnfolder]: 60/152 cut-off events. [2023-09-01 11:07:55,708 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 11:07:55,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 152 events. 60/152 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 398 event pairs, 51 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 278. Up to 133 conditions per place. [2023-09-01 11:07:55,709 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 24 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-09-01 11:07:55,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 211 flow [2023-09-01 11:07:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:07:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:07:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1913 transitions. [2023-09-01 11:07:55,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466130604288499 [2023-09-01 11:07:55,714 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1913 transitions. [2023-09-01 11:07:55,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1913 transitions. [2023-09-01 11:07:55,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:07:55,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1913 transitions. [2023-09-01 11:07:55,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.41666666666666) internal successors, (1913), 12 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:55,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 342.0) internal successors, (4446), 13 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:55,728 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 342.0) internal successors, (4446), 13 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:55,728 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 1913 transitions. [2023-09-01 11:07:55,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 211 flow [2023-09-01 11:07:55,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 197 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:07:55,732 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-09-01 11:07:55,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=175, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-09-01 11:07:55,733 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-09-01 11:07:55,733 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-09-01 11:07:55,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:55,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:07:55,735 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 11:07:55,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 11:07:55,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 11:07:55,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:07:55,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:07:55,941 INFO L85 PathProgramCache]: Analyzing trace with hash -989558236, now seen corresponding path program 3 times [2023-09-01 11:07:55,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:07:55,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594310708] [2023-09-01 11:07:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:07:55,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:07:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:07:55,972 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:07:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:07:56,016 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:07:56,017 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:07:56,018 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:07:56,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:07:56,020 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:07:56,022 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:07:56,022 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:07:56,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 11:07:56,081 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:07:56,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 263 transitions, 544 flow [2023-09-01 11:07:56,114 INFO L130 PetriNetUnfolder]: 82/449 cut-off events. [2023-09-01 11:07:56,114 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:07:56,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 449 events. 82/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1979 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-09-01 11:07:56,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 263 transitions, 544 flow [2023-09-01 11:07:56,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 263 transitions, 544 flow [2023-09-01 11:07:56,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:07:56,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 263 transitions, 544 flow [2023-09-01 11:07:56,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 263 transitions, 544 flow [2023-09-01 11:07:56,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 263 transitions, 544 flow [2023-09-01 11:07:56,168 INFO L130 PetriNetUnfolder]: 82/449 cut-off events. [2023-09-01 11:07:56,168 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:07:56,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 449 events. 82/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1979 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-09-01 11:07:56,185 INFO L119 LiptonReduction]: Number of co-enabled transitions 35052 [2023-09-01 11:07:58,838 INFO L134 LiptonReduction]: Checked pairs total: 57347 [2023-09-01 11:07:58,838 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-09-01 11:07:58,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:07:58,841 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;@7f4644c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:07:58,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:07:58,848 INFO L130 PetriNetUnfolder]: 36/110 cut-off events. [2023-09-01 11:07:58,848 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:07:58,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:07:58,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:07:58,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:07:58,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:07:58,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1710938653, now seen corresponding path program 1 times [2023-09-01 11:07:58,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:07:58,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422891138] [2023-09-01 11:07:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:07:58,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:07:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:07:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:07:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:07:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422891138] [2023-09-01 11:07:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422891138] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:07:58,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:07:58,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:07:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099199301] [2023-09-01 11:07:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:07:58,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:07:58,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:07:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:07:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:07:58,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 466 [2023-09-01 11:07:58,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 107 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:07:58,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:07:58,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 466 [2023-09-01 11:07:58,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:00,081 INFO L130 PetriNetUnfolder]: 12109/18691 cut-off events. [2023-09-01 11:08:00,081 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-09-01 11:08:00,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35981 conditions, 18691 events. 12109/18691 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 120028 event pairs, 10328 based on Foata normal form. 3243/18283 useless extension candidates. Maximal degree in co-relation 12239. Up to 17187 conditions per place. [2023-09-01 11:08:00,211 INFO L137 encePairwiseOnDemand]: 431/466 looper letters, 40 selfloop transitions, 2 changer transitions 25/76 dead transitions. [2023-09-01 11:08:00,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 294 flow [2023-09-01 11:08:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:08:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:08:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2023-09-01 11:08:00,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525035765379113 [2023-09-01 11:08:00,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2023-09-01 11:08:00,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2023-09-01 11:08:00,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:00,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2023-09-01 11:08:00,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:00,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:00,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:00,219 INFO L175 Difference]: Start difference. First operand has 71 places, 107 transitions, 232 flow. Second operand 3 states and 734 transitions. [2023-09-01 11:08:00,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 294 flow [2023-09-01 11:08:00,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:08:00,221 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 124 flow [2023-09-01 11:08:00,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2023-09-01 11:08:00,222 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-09-01 11:08:00,223 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 124 flow [2023-09-01 11:08:00,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:00,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:00,223 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:08:00,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:08:00,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:00,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash 262369979, now seen corresponding path program 1 times [2023-09-01 11:08:00,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:00,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964827626] [2023-09-01 11:08:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:08:00,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:00,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964827626] [2023-09-01 11:08:00,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964827626] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:08:00,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745185513] [2023-09-01 11:08:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:00,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:00,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:08:00,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:08:00,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:08:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:08:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:08:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:08:00,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:08:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:08:00,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745185513] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:08:00,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:08:00,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:08:00,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517666240] [2023-09-01 11:08:00,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:08:00,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:08:00,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:00,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:08:00,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:08:00,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 466 [2023-09-01 11:08:00,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:00,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:00,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 466 [2023-09-01 11:08:00,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:00,641 INFO L130 PetriNetUnfolder]: 2090/3401 cut-off events. [2023-09-01 11:08:00,642 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 11:08:00,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 3401 events. 2090/3401 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18317 event pairs, 1833 based on Foata normal form. 0/2684 useless extension candidates. Maximal degree in co-relation 6596. Up to 3127 conditions per place. [2023-09-01 11:08:00,703 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-09-01 11:08:00,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 226 flow [2023-09-01 11:08:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:08:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:08:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1320 transitions. [2023-09-01 11:08:00,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721030042918455 [2023-09-01 11:08:00,708 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1320 transitions. [2023-09-01 11:08:00,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1320 transitions. [2023-09-01 11:08:00,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:00,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1320 transitions. [2023-09-01 11:08:00,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 220.0) internal successors, (1320), 6 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:00,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 466.0) internal successors, (3262), 7 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:00,716 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 466.0) internal successors, (3262), 7 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:00,716 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 124 flow. Second operand 6 states and 1320 transitions. [2023-09-01 11:08:00,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 226 flow [2023-09-01 11:08:00,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 11:08:00,718 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 154 flow [2023-09-01 11:08:00,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-09-01 11:08:00,718 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2023-09-01 11:08:00,719 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 154 flow [2023-09-01 11:08:00,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.71428571428572) internal successors, (1496), 7 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:00,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:00,720 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:08:00,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:08:00,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:00,926 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:00,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash -676654691, now seen corresponding path program 2 times [2023-09-01 11:08:00,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:00,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146437395] [2023-09-01 11:08:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:00,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:08:00,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:00,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146437395] [2023-09-01 11:08:00,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146437395] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:08:00,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548460179] [2023-09-01 11:08:00,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:08:00,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:00,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:08:00,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:08:01,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:08:01,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:08:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:08:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:08:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:08:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:08:01,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:08:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:08:01,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548460179] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:08:01,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:08:01,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:08:01,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522973259] [2023-09-01 11:08:01,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:08:01,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:08:01,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:08:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:08:01,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 466 [2023-09-01 11:08:01,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 154 flow. Second operand has 13 states, 13 states have (on average 213.3846153846154) internal successors, (2774), 13 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:01,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:01,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 466 [2023-09-01 11:08:01,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:01,483 INFO L130 PetriNetUnfolder]: 2090/3407 cut-off events. [2023-09-01 11:08:01,484 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 11:08:01,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 3407 events. 2090/3407 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18272 event pairs, 1833 based on Foata normal form. 6/2697 useless extension candidates. Maximal degree in co-relation 6580. Up to 3127 conditions per place. [2023-09-01 11:08:01,495 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 40 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-09-01 11:08:01,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 292 flow [2023-09-01 11:08:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:08:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:08:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2601 transitions. [2023-09-01 11:08:01,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46512875536480686 [2023-09-01 11:08:01,502 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2601 transitions. [2023-09-01 11:08:01,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2601 transitions. [2023-09-01 11:08:01,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:01,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2601 transitions. [2023-09-01 11:08:01,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 216.75) internal successors, (2601), 12 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:01,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 466.0) internal successors, (6058), 13 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:01,516 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 466.0) internal successors, (6058), 13 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:01,516 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 154 flow. Second operand 12 states and 2601 transitions. [2023-09-01 11:08:01,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 292 flow [2023-09-01 11:08:01,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:08:01,519 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 224 flow [2023-09-01 11:08:01,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=224, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-09-01 11:08:01,519 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-09-01 11:08:01,519 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 224 flow [2023-09-01 11:08:01,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 213.3846153846154) internal successors, (2774), 13 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:01,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:01,521 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:08:01,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:08:01,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:01,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:01,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1189684003, now seen corresponding path program 3 times [2023-09-01 11:08:01,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:01,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584134626] [2023-09-01 11:08:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:01,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:08:01,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:08:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:08:01,767 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:08:01,767 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:08:01,767 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:08:01,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 11:08:01,767 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:08:01,768 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:08:01,768 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:08:01,768 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 11:08:01,795 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:08:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 334 transitions, 698 flow [2023-09-01 11:08:01,871 INFO L130 PetriNetUnfolder]: 120/656 cut-off events. [2023-09-01 11:08:01,872 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 11:08:01,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 656 events. 120/656 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3152 event pairs, 1 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 457. Up to 16 conditions per place. [2023-09-01 11:08:01,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 334 transitions, 698 flow [2023-09-01 11:08:01,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 334 transitions, 698 flow [2023-09-01 11:08:01,887 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:08:01,888 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 334 transitions, 698 flow [2023-09-01 11:08:01,888 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 334 transitions, 698 flow [2023-09-01 11:08:01,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 334 transitions, 698 flow [2023-09-01 11:08:01,962 INFO L130 PetriNetUnfolder]: 120/656 cut-off events. [2023-09-01 11:08:01,962 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 11:08:01,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 656 events. 120/656 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3152 event pairs, 1 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 457. Up to 16 conditions per place. [2023-09-01 11:08:01,992 INFO L119 LiptonReduction]: Number of co-enabled transitions 67482 [2023-09-01 11:08:04,894 INFO L134 LiptonReduction]: Checked pairs total: 115379 [2023-09-01 11:08:04,894 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-09-01 11:08:04,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:08:04,896 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;@7f4644c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:08:04,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:08:04,912 INFO L130 PetriNetUnfolder]: 62/181 cut-off events. [2023-09-01 11:08:04,913 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 11:08:04,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:04,913 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:08:04,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:04,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:04,914 INFO L85 PathProgramCache]: Analyzing trace with hash -209680597, now seen corresponding path program 1 times [2023-09-01 11:08:04,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:04,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412320721] [2023-09-01 11:08:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:04,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:08:04,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:04,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412320721] [2023-09-01 11:08:04,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412320721] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:08:04,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:08:04,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:08:04,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007640854] [2023-09-01 11:08:04,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:08:04,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:08:04,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:08:04,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:08:04,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 593 [2023-09-01 11:08:04,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 139 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:04,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:04,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 593 [2023-09-01 11:08:04,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:29,638 INFO L130 PetriNetUnfolder]: 291611/404344 cut-off events. [2023-09-01 11:08:29,638 INFO L131 PetriNetUnfolder]: For 4198/4198 co-relation queries the response was YES. [2023-09-01 11:08:30,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779861 conditions, 404344 events. 291611/404344 cut-off events. For 4198/4198 co-relation queries the response was YES. Maximal size of possible extension queue 8917. Compared 3058711 event pairs, 255919 based on Foata normal form. 69865/397351 useless extension candidates. Maximal degree in co-relation 87034. Up to 373221 conditions per place. [2023-09-01 11:08:30,849 INFO L137 encePairwiseOnDemand]: 548/593 looper letters, 57 selfloop transitions, 2 changer transitions 26/98 dead transitions. [2023-09-01 11:08:30,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 98 transitions, 386 flow [2023-09-01 11:08:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:08:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:08:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 930 transitions. [2023-09-01 11:08:30,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227655986509275 [2023-09-01 11:08:30,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 930 transitions. [2023-09-01 11:08:30,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 930 transitions. [2023-09-01 11:08:30,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:30,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 930 transitions. [2023-09-01 11:08:30,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:30,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:30,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:30,859 INFO L175 Difference]: Start difference. First operand has 92 places, 139 transitions, 308 flow. Second operand 3 states and 930 transitions. [2023-09-01 11:08:30,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 98 transitions, 386 flow [2023-09-01 11:08:30,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:08:30,865 INFO L231 Difference]: Finished difference. Result has 95 places, 72 transitions, 175 flow [2023-09-01 11:08:30,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=95, PETRI_TRANSITIONS=72} [2023-09-01 11:08:30,867 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2023-09-01 11:08:30,867 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 72 transitions, 175 flow [2023-09-01 11:08:30,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:30,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:30,867 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:08:30,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 11:08:30,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:30,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:30,868 INFO L85 PathProgramCache]: Analyzing trace with hash 856161219, now seen corresponding path program 1 times [2023-09-01 11:08:30,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:30,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798171891] [2023-09-01 11:08:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:08:30,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:30,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798171891] [2023-09-01 11:08:30,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798171891] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:08:30,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796568664] [2023-09-01 11:08:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:30,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:30,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:08:30,932 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:08:30,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:08:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:31,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:08:31,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:08:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:08:31,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:08:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:08:31,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796568664] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:08:31,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:08:31,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:08:31,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502752937] [2023-09-01 11:08:31,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:08:31,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:08:31,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:08:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:08:31,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 593 [2023-09-01 11:08:31,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 72 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 269.85714285714283) internal successors, (1889), 7 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:31,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:31,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 593 [2023-09-01 11:08:31,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:35,998 INFO L130 PetriNetUnfolder]: 52726/74726 cut-off events. [2023-09-01 11:08:35,998 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2023-09-01 11:08:36,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144813 conditions, 74726 events. 52726/74726 cut-off events. For 1909/1909 co-relation queries the response was YES. Maximal size of possible extension queue 1957. Compared 500685 event pairs, 46777 based on Foata normal form. 0/59675 useless extension candidates. Maximal degree in co-relation 144799. Up to 68679 conditions per place. [2023-09-01 11:08:36,343 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 57 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-09-01 11:08:36,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 311 flow [2023-09-01 11:08:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:08:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:08:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1673 transitions. [2023-09-01 11:08:36,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702079820123665 [2023-09-01 11:08:36,348 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1673 transitions. [2023-09-01 11:08:36,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1673 transitions. [2023-09-01 11:08:36,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:36,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1673 transitions. [2023-09-01 11:08:36,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 278.8333333333333) internal successors, (1673), 6 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:36,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:36,358 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:36,358 INFO L175 Difference]: Start difference. First operand has 95 places, 72 transitions, 175 flow. Second operand 6 states and 1673 transitions. [2023-09-01 11:08:36,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 311 flow [2023-09-01 11:08:36,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 301 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 11:08:36,362 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 201 flow [2023-09-01 11:08:36,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-09-01 11:08:36,362 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -11 predicate places. [2023-09-01 11:08:36,362 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 201 flow [2023-09-01 11:08:36,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 269.85714285714283) internal successors, (1889), 7 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:36,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:36,363 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:08:36,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 11:08:36,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 11:08:36,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:36,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1409609003, now seen corresponding path program 2 times [2023-09-01 11:08:36,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:36,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605405332] [2023-09-01 11:08:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:36,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:08:36,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:36,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605405332] [2023-09-01 11:08:36,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605405332] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:08:36,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866234113] [2023-09-01 11:08:36,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:08:36,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:36,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:08:36,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:08:36,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:08:36,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:08:36,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:08:36,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:08:36,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:08:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:08:36,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:08:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:08:36,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866234113] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:08:36,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:08:36,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:08:36,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627031080] [2023-09-01 11:08:36,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:08:36,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:08:36,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:08:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:08:36,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 593 [2023-09-01 11:08:36,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 269.46153846153845) internal successors, (3503), 13 states have internal predecessors, (3503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:36,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:36,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 593 [2023-09-01 11:08:36,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:08:42,397 INFO L130 PetriNetUnfolder]: 52726/74732 cut-off events. [2023-09-01 11:08:42,397 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-09-01 11:08:42,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144410 conditions, 74732 events. 52726/74732 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 1959. Compared 500637 event pairs, 46777 based on Foata normal form. 6/59688 useless extension candidates. Maximal degree in co-relation 144350. Up to 68679 conditions per place. [2023-09-01 11:08:42,765 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 57 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-09-01 11:08:42,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 373 flow [2023-09-01 11:08:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:08:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:08:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3290 transitions. [2023-09-01 11:08:42,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46233839235525576 [2023-09-01 11:08:42,773 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3290 transitions. [2023-09-01 11:08:42,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3290 transitions. [2023-09-01 11:08:42,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:08:42,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3290 transitions. [2023-09-01 11:08:42,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 274.1666666666667) internal successors, (3290), 12 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:42,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 593.0) internal successors, (7709), 13 states have internal predecessors, (7709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:42,792 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 593.0) internal successors, (7709), 13 states have internal predecessors, (7709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:42,792 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 201 flow. Second operand 12 states and 3290 transitions. [2023-09-01 11:08:42,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 373 flow [2023-09-01 11:08:42,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 81 transitions, 359 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:08:42,795 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 271 flow [2023-09-01 11:08:42,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=271, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-09-01 11:08:42,795 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2023-09-01 11:08:42,796 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 271 flow [2023-09-01 11:08:42,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 269.46153846153845) internal successors, (3503), 13 states have internal predecessors, (3503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:42,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:42,797 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:08:42,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 11:08:43,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:08:43,002 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:43,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash -560863701, now seen corresponding path program 3 times [2023-09-01 11:08:43,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:43,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256693221] [2023-09-01 11:08:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:43,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:08:43,021 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:08:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:08:43,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:08:43,037 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:08:43,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:08:43,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:08:43,037 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:08:43,038 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:08:43,038 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:08:43,038 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 11:08:43,073 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 11:08:43,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 405 transitions, 854 flow [2023-09-01 11:08:43,165 INFO L130 PetriNetUnfolder]: 170/927 cut-off events. [2023-09-01 11:08:43,165 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 11:08:43,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 927 events. 170/927 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4716 event pairs, 6 based on Foata normal form. 0/748 useless extension candidates. Maximal degree in co-relation 676. Up to 32 conditions per place. [2023-09-01 11:08:43,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 405 transitions, 854 flow [2023-09-01 11:08:43,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 405 transitions, 854 flow [2023-09-01 11:08:43,187 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:08:43,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 405 transitions, 854 flow [2023-09-01 11:08:43,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 405 transitions, 854 flow [2023-09-01 11:08:43,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 405 transitions, 854 flow [2023-09-01 11:08:43,276 INFO L130 PetriNetUnfolder]: 170/927 cut-off events. [2023-09-01 11:08:43,277 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 11:08:43,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 927 events. 170/927 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4716 event pairs, 6 based on Foata normal form. 0/748 useless extension candidates. Maximal degree in co-relation 676. Up to 32 conditions per place. [2023-09-01 11:08:43,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 109848 [2023-09-01 11:08:46,586 INFO L134 LiptonReduction]: Checked pairs total: 192210 [2023-09-01 11:08:46,586 INFO L136 LiptonReduction]: Total number of compositions: 310 [2023-09-01 11:08:46,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:08:46,590 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;@7f4644c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:08:46,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:08:46,606 INFO L130 PetriNetUnfolder]: 91/260 cut-off events. [2023-09-01 11:08:46,606 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 11:08:46,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:08:46,607 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:08:46,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:08:46,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:08:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2106642474, now seen corresponding path program 1 times [2023-09-01 11:08:46,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:08:46,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448380668] [2023-09-01 11:08:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:08:46,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:08:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:08:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-09-01 11:08:46,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:08:46,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448380668] [2023-09-01 11:08:46,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448380668] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:08:46,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:08:46,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:08:46,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311153056] [2023-09-01 11:08:46,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:08:46,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:08:46,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:08:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:08:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:08:46,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 715 [2023-09-01 11:08:46,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 172 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:08:46,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:08:46,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 715 [2023-09-01 11:08:46,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand